Air-to-Water Heatpump Product Training

Air-to-Water Heatpump Product Training
SDC & SDF Series 22nd – 23rd July 2010

Content Content of Product Training Product Line Up
System of Model Number Product Feature Product Specification Product Dimension Product Operating Condition Competitors Product Comparison Location of Controls & Components Refrigeration Cycle & Water Circuit System Configuration Block & Wiring Diagrams Indoor Unit Installation Optional External Device Installation Operation & Control Servicing Mode Self-diagnosis Method

Product Line Up

Content Product Line Up 7kW 9kW 12kW 14kW 16kW Indoor Unit
WH-SDC07C3E5 WH-SDF07C3E5 WH-SDC09C3E5 WH-SDF09C3E5 WH-SDC12C6E5 WH-SDF12C6E5 WH-SDC14C6E5 WH-SDF14C6E5 WH-SDC16C6E5 WH-SDF16C6E5 Outdoor Unit WH-UD07CE5-A WH-UD09CE5-A WH-UD12CE5-A WH-UD14CE5-A WH-UD16CE5-A

System of Model Number

System of Model Number Indoor Unit Heat exchange unit WH S D F 07 C 3
5 WH : Air-to-Water S : Split-type D : Standard F : Heating Only ; C : Heating & Cooling Heating Capacity (kW) Generation (Development Sequence) Backup Heater Size (3: 3kW ; 6: 6kW) Destination (E: Europe) Power Source (5: Single Phase ; 8: Three Phase)

System of Model Number Outdoor Unit Heat exchange unit WH U D 07 C E 5
WH : Air-to-Water U : Split-type D : Standard Heating Capacity (kW) Generation (Development Sequence) Destination (E: Europe) Power Source (5: Single Phase ; 8: Three Phase) Connectivity (A: SDF or SDC indoor unit)

Product Feature

Top Class Energy Saving & Compact Heat Exchanger Unit in Industry
Content Product Feature Top Class Energy Saving & Compact Heat Exchanger Unit in Industry Optimized use of Air-to-Air Heat Pump technology to realize up to COP 4.67* Panasonic Air-to-Water * EUROVENT standard (7oC outdoor ambient temperature / 35oC leaving water temperature) for 16.0kW model 892mm Space saving installation with compact design of heat exchanger unit (total volume 0.158m3) SDH : HxWxD : 644x504x295 (0.095m3) UP 66% compared SDF/SDC Daikin Altherma (EKHBH008AA***) : 922x502x361 (0.167m3) Hitachi AquaFree (RWM-3FSN1E/RAS-3HVRNE) : 900x526x372 (0.176m3) Fujitsu General (S6/AOHA24LA) : 1000x450x480 (0.216m3) Toshiba Estia (HWS-****XWHM) : 925x525x355 (0.172m3) 502mm 353mm Volume ratio compare with Daikin Altherma 51%, Toshiba Estia 52%, Hitachi AquaFree 53% & Fujitsu General 58%

Flexible Application & Easy Installation of Heat Pump Unit
Content Product Feature Flexible Application & Easy Installation of Heat Pump Unit Maximum 40m Pipe Length Maximum 30m Height Difference Optimize design for installation space. Long pipe specification improves the flexibility for long piping installation up to 40m* & height difference up to 30m* Pipe connection flexibility allow outdoor pipe connection in four directions (front, bottom, side, rear) to indoor heat exchanger unit * for the 12kW, 14kW and 16.0kW models Rear Side Front Bottom

Content Product Feature
Easy Maintenance, Monitoring Operation of Heat Exchanger Unit & Weekly Timer Front maintenance design of heat exchanger unit allow front panel to be opened or closed by just three screws. Thus, service or maintenance is convenient Easy monitoring of operation status (OFF/ON, outdoor & water inlet & outlet temperatures, abnormality) from the front control panel of heat exchanger unit It is possible to program operation in accordance with the typical weekly schedule (6 programs per day and 42 programs per week) Control Panel

Content Product Feature
Wide Range (7kW ~ 16kW), Flexibility & High Connectivity to Existing or New Installation The Aquarea offer wide ranges (7kW ~ 16kW) that adapt just as well to an existing installation as boiler backup or to a new installation with radiant floor, low-temperature radiators or even fan-coil (in heating and cooling for the SDC models). These ranges also allow connect to a solar kit to increase efficiency and minimise the impact of ecosystem.

Product Specification

Indoor Unit Specification (SDC) Specification items 7kW 9kW 12kW 14kW 16kW Noise level dB (A) C/H : 30 Power Level dB C/H : 43 Dimension Height mm 892 Width 502 Depth 353 Net weight kg 45 51 Refrigerant pipe diameter Liquid mm (inch) 6.35 (1/4) 9.52 (3/8) Gas 15.88 (5/8) Water pipe diameter Inlet 28.00 (1-3/32) Outlet Water drainage diameter 15.00 (19/32) Water pump Motor type Capacitor Run Induction (2.5uF) Capacitor Run Induction (5uF) No. of speed 3 Input power W 100 190 Water flow rate l/min C: 17.6; H: 20.1 C: 20.4; H: 25.8 C: 28.7; H: 34.4 C: 33.0; H: 40.1 C: 35.0; H: 45.9 Pressure relief valve kPa Open: 190; Close: 183 and below Protective device (RCCB) A 40 Expansion vessel volume l 10 Electrical heater kW 3.00 6.00

Indoor Unit Specification (SDF) Specification items 7kW 9kW 12kW 14kW 16kW Noise level dB (A) 30 Power Level dB 43 Dimension Height mm 892 Width 502 Depth 353 Net weight kg 49 Refrigerant pipe diameter Liquid mm (inch) 6.35 (1/4) 9.52 (3/8) Gas 15.88 (5/8) Water pipe diameter Inlet 28.00 (1-3/32) Outlet Water drainage diameter 15.00 (19/32) Water pump Motor type Capacitor Run Induction (2.5uF) Capacitor Run Induction (5uF) No. of speed 3 Input power W 100 190 Water flow rate l/min 20.1 25.8 34.4 40.1 45.9 Pressure relief valve kPa Open: 190; Close: 183 and below Protective device (RCCB) A 40 Expansion vessel volume l 10 Electrical heater kW 3.00 6.00

Heat exchange unit Outdoor Unit Specification (SDC) Specification items 7kW 9kW 12kW 14kW 16kW *Cooling capacity kW 6.00 7.00 10.00 11.50 12.20 EER W/W 2.61 2.41 2.78 2.54 *Heating capacity 9.00 12.00 14.00 16.00 *COP 4.40 4.10 4.67 4.50 4.23 Noise level dB (A) C/H: 48 C: 50; H: 49 C/H: 50 C: 52; H: 51 C: 54; H: 53 Power Level dB C/H: 66 C: 68; H: 67 C: 70; H: 68 C: 72; H: 70 Dimension Height mm 795 1340 Width 900 Depth 320 Net weight kg 66 106 Refrigerant control device Expansion valve Refrigerant oil cm3 FV50S (900) FV50S (1200) Refrigerant (R410A) 1.45 2.75 Refrigerant pipe diameter Liquid mm (inch) 6.35 (1/4) 9.52mm (3/8) Gas 15.88 (5/8) Standard pipe length m 7 Pipe length range 3 ~ 30 3 ~ 40 Maximum height difference 20 30

Outdoor Unit Specification (SDC) Specification items 7kW 9kW 12kW 14kW 16kW Additional gas charging g/m 30 50 Refrigerant chargeless m 10 Compressor Type Hermetic motor Motor type Brushless (4-pole) Rated output kW 1.70 3.00 Fan Propeller fan Transistor (8-pole) Output power W 60 Speed RPM C: 670; H: 580 C: 700; H: 640 C: 600 (top); 640 (bottom) H: 510 (top); 550 (bottom) C: 630 (top); 670 (bottom) H: 540 (top); 580 (bottom) H: 580 (top); 620 (bottom)

Heat exchange unit Outdoor Unit Specification (SDF) Specification items 7kW 9kW 12kW 14kW 16kW *Heating capacity kW 7.00 9.00 12.00 14.00 16.00 *COP W/W 4.40 4.10 4.67 4.50 4.23 Noise level dB (A) 48 49 50 51 53 Power Level dB 66 67 68 70 Dimension Height mm 795 1340 Width 900 Depth 320 Net weight kg 106 Refrigerant control device Expansion valve Refrigerant oil cm3 FV50S (900) FV50S (1200) Refrigerant (R410A) 1.45 2.75 Refrigerant pipe diameter Liquid mm (inch) 6.35 (1/4) 9.52mm (3/8) Gas 15.88 (5/8) Standard pipe length m 7 Pipe length range 3 ~ 30 3 ~ 40 Maximum height difference 20 30

Outdoor Unit Specification (SDF) Specification items 7kW 9kW 12kW 14kW 16kW Additional gas charging g/m 30 50 Refrigerant chargeless m 10 Compressor Type Hermetic motor Motor type Brushless (4-pole) Rated output kW 1.70 3.00 Fan Propeller fan Transistor (8-pole) Output power W 60 Speed RPM 580 640 510 (top); 550 (bottom) 540 (top); 580 (bottom) 580 (top); 620 (bottom)

Product Dimension

Product Dimension Indoor Unit Dimension (7kW ~ 16kW)
Heat exchange unit Indoor Unit Dimension (7kW ~ 16kW) Unit: mm

Product Dimension Outdoor Unit Dimension (7kW ~ 9kW)
Heat exchange unit Outdoor Unit Dimension (7kW ~ 9kW) 30cm Unit: mm

Product Dimension Outdoor Unit Dimension (12kW ~ 16kW)
Heat exchange unit Outdoor Unit Dimension (12kW ~ 16kW) 30cm Dimension same as 2-fan CU-L series Unit: mm

Product Operating Condition

Product Operating Condition
Heat exchange unit Product Operating Condition Indoor Outdoor Water outlet temperature (oC) Ambient temperature (oC) Cooling Maximum 20 43 Minimum 5 16 Heating 55 35 25 -20 When outdoor temperature is out of the above temperature range, the cooling or heating capacity will drop significantly and outdoor unit might stop for protection control.

Location of Controls & Components

Location of Controls & Components
Indoor Unit Control Panel (7kW ~ 16kW) 7 6 4 3 25 13 5 8 11 12 9 24 10 23 2 1 * for the SDF control panel, there’s no Cool Mode Indicator *

Indoor Unit Control Panel (7kW ~ 16kW) 19 17 22 * 18 14 15 20 21 16 * for the SDF control panel, there’s no Water set temperature during cool mode (5oC ~ 20oC)

Indoor Unit Control Panel (7kW ~ 16kW) 19 17 22 * 18 14 15 20 21 16 * for the SDF control panel, there’s no Cool + Tank and Cool Mode selection

Indoor Unit Control Panel (7kW ~ 16kW)

(Activate when water pressure exceeds 0.20MPa)
Location of Controls & Components Heat exchange unit Indoor Unit Components (Activate when water pressure exceeds 0.20MPa) (10L) Pump: 7kW, 9kW -> max 65L/min 12kW, 14kW, 16kW -> max 90L/min

Refrigeration Cycle & Water Circuit

Refrigeration Cycle & Water Circuit
Heat exchange unit

System Configuration

Block & Wiring Diagrams

Indoor Unit & Outdoor Unit Block Diagram (7kW ~ 9kW)

Indoor Unit & Outdoor Unit Block Diagram (12kW ~16kW)

Heat exchange unit Indoor Unit Wiring Diagram (7kW ~ 9kW)

Heat exchange unit Indoor Unit Wiring Diagram (12kW ~ 16kW)

Heat exchange unit Outdoor Unit Wiring Diagram (7kW ~ 9kW)

Heat exchange unit Outdoor Unit Wiring Diagram (12kW ~ 16kW)

Indoor Unit Installation
(7kW ~ 16kW)

Heat exchange unit Indoor Unit Installation Diagram IMPORTANT: Cover refrigerant circuit’s tube connectors and pipes properly to prevent water or moisture from entering the circuit during installation and service work. Failing to do so may cause the system to malfunction. Ø28.00mm (1-3/32”) Ø28.00mm (1-3/32”) * For SDF models, 2-way valve cable is NOT required

Heat exchange unit How to Fix Installation Plate

Heat exchange unit Install The Indoor Unit

Heat exchange unit Water Pipe Installation 1. The minimum requirement of water in the system is 30 litres (for 7kW ~ 9kW models) and 50 litres (for 12kW ~ 16kW models). If this value could not be achieved, please install additional buffer tank (field supply). 2. Cover the pipe end to prevent dirt and dust when inserting it through wall. 3. Must install an external filter (30 mesh or more, field supply) before water inlet connector of indoor unit (indicated with “WATER IN”). 4. Use Rp 1-1/4” nut for both water inlet and water outlet connection and clean all piping with tap water before install. 5. Be sure to use two spanners to tighten the connection with 117.6N.m torque. Over tightening will cause water leakage. 6. Make sure to insulate the water circuit pipes to prevent reduction of heating and cooling capacity. 7. Mount the PS foam and long banding strap (factory supply as accessory for SDC models) to water inlet and water outlet connectors. * Only applicable for SDC models. SUS304 dia SUS304 - Stainless steel grade 304 Dia0.2 - each wire size measures 0.2 diameter. 30 - no. of mesh 1 inch is 30. ( as in file attached: sonewn_com_page013_html)

Heat exchange unit Drain Hose Installation

Heat exchange unit Drain Elbow & Hose Installation (for SDC models only)

Terminal board for external device connection
Indoor Unit Installation Heat exchange unit Electrical Cable Connection (7kW ~ 9kW) Terminal board for external device connection (4 x 4.0 or 6.0mm2) (3 x 4.0mm2) (3 x 4.0 or 6.0mm2) Power Supply 1 - For indoor and outdoor units. Power Supply 2 - For indoor unit backup heater (3kW) and tank unit booster heater (3kW)

Terminal board for external device connection
Indoor Unit Installation Heat exchange unit Electrical Cable Connection (12kW ~ 16kW) Terminal board for external device connection (4 x 4.0 or 6.0mm2) (3 x 4.0mm2) (3 x 1.5mm2) (3 x 4.0 or 6.0mm2) Power Supply 1 - For indoor and outdoor units. Power Supply 2 - For indoor unit backup heater (6kW) Power Supply 3 - For tank unit booster heater (3kW)

Heat exchange unit Electrical Cable for Optional External Device (Field Supply) * for the SDC models

Maximum output power of tank booster heater should be ≤ 3kW.
Indoor Unit Installation Heat exchange unit Optional External Device Connecting Requirement Install a solar connection PCB (CZ-NS1P) when solar station is utilized. 1-pole (min 3.0mm contact gap) * for the SDC models Must connect a jumper between terminal no.13 & no.14, when there’s no tank OLP connection. Maximum output power of tank booster heater should be ≤ 3kW.

Optional External Device Installation

Recommended external room thermostat:
Optional External Device Installation (a) External Room Thermostat To connect an external room thermostat, make sure set the external thermo controller connection to YES through Special Functions Setting Recommended external room thermostat: REMOTE indication will display when external thermo controller connection is set to YES REV200

(a) External Room Thermostat

Recommended 3- way valve kit:
Optional External Device Installation (b) 3- Way Valve Control Recommended 3- way valve kit: 3-way valve function: To change the flow direction of hot/cold water to room side or hot water to tank side. (AB -> A: CLOSE) SFA21/18 (AB -> B: OPEN) (Tank Side) 1. During STOP/HEAT/COOL/FORCE HEATER/PUMPDOWN MODE, relay is default at terminal no.04. (AB -> B: OPEN) 2. During TANK MODE, relay is switched to terminal no.05. (AB -> A: OPEN) VXI46/25 (Room Side)

(c) 2- Way Valve Control (for SDC models only) Recommended 2- way valve kit: 2-way valve function: To allow hot water to radiant floor and/or radiator or to block cold water to radiant floor and/or radiator. SFA21/18 (A -> AB: CLOSE) (radiant floor/radiator) 1. During STOP/TANK/COOL/PUMPDOWN MODE, relay is default at terminal no.01. (A -> AB: CLOSE) 2. During HEAT/FORCE HEATER MODE, relay is switched to terminal no.02. (A -> AB: OPEN) VVI46/25

Connecting cable length must NOT exceed 10m !
Optional External Device Installation (c) Solar Connection PCB (CZ-NS1P) & Control Connecting cable length must NOT exceed 10m ! 1. When solar station pump P2 OFF, CZ-NS1P relay is default at terminal no.20. AB -> A (CLOSE) and tank unit is not heat-up by solar station. 2. When solar station pump P2 ON, CZ-NS1P relay will switch to terminal no.21. AB -> A (OPEN) and tank unit is heat-up by solar station.

(c) Solar Connection PCB (CZ-NS1P)

Operation & Control

Backup & Booster Heaters
Operation & Control (a) Cool Mode Operation (only for the SDC models) OFF OFF Backup & Booster Heaters 1. Thermostat OFF: water outlet temp. < water set temp oC (continuously for 3 mins). 2. Thermostat ON: water outlet temp. > water inlet temp. (at the time of thermostat OFF is triggered) + 3oC (3 mins delay restart). 3. Solar OFF: tank temp. > 77oC; Solar ON: tank temp. < 70oC. 4. Indoor water pump always ON.

Operation & Control Heat exchange unit (b) Cool + Tank Mode Operation (only for the SDC models) OFF OFF 1. Thermostat OFF: water outlet temp. < water set temp oC (continuously for 3 mins). 2. Thermostat ON: water outlet temp. > water inlet temp. (at the time of thermostat OFF is triggered) + 3oC (3 mins delay restart). 3. Solar OFF: tank temp. > 77oC; Solar ON: tank temp. < 70oC. 4. Indoor water pump always ON.

Operation & Control (c) Heat Mode Operation ON OFF
Booster Heater ON OFF 1. Thermostat OFF: water outlet temp. > water set temp oC (continuously for 3 mins). 2. Thermostat ON: water outlet temp. < water inlet temp. (at the time of thermostat OFF is triggered) - 3oC (3 mins delay restart). 3. Backup heater OFF: water outlet temp. > water set temp. - 2oC (continuously for 15 secs). 4. Backup heater ON: water outlet temp. < water set temp. - 8oC AND after 20 mins since previous OFF.

Operation & Control (d) Tank Mode Operation OFF ON
1. Water set temp. = tank set temp. or 55oC whichever is lower. 2. Thermostat OFF: tank temp. > water set temp. + 2oC (continuously for 3 mins). 3. Thermostat ON: tank temp. < water set temp. - 3oC AND water pump ON for 3 mins. 4. Water pump ON: tank temp. < tank temp. (at the time thermostat OFF is triggered) - 3oC. 5. When solar priority is set, heatpump and booster heater OFF when solar request ON. 6. 2 way valve always OFF.

Operation & Control (d) Tank Mode Operation OFF ON
If solar priority is not set, solar 3WV ON only after heatpump thermostat OFF. 1. Water set temp. = tank set temp. or 55oC whichever is lower. 2. Thermostat OFF: tank temp. > water set temp. + 2oC (continuously for 3 mins). 3. Thermostat ON: tank temp. < water set temp. - 3oC AND water pump ON for 3 mins. 4. Water pump ON: tank temp. < tank temp. (at the time thermostat OFF is triggered) - 3oC. 5. 2 way valve always OFF.

Operation & Control (e) Heat + Tank Mode Operation (Heating No Priority) ON OFF/ON 1. During heating heat-up interval, switch to tank heat-up when heating heat-up interval ends, and tank temp. < tank set temp. - 3oC (AND solar 3WV OFF if solar priority is set) is fulfilled 2. During tank heat-up interval, switch to heating heat-up when tank heat-up interval ends OR tank temp. > tank set temp. + 2oC (continuously 3 mins) 3. During heating heat-up interval, backup & booster heaters ON/OFF follows normal operation control 4. Once switch to tank heat-up interval, backup & booster heaters OFF and booster heater delay timer start counting. Booster heater ON after delay timer AND tank temp. < tank set temp.

Operation & Control (e) Heat + Tank Mode Operation (Heating No Priority) ON OFF/ON 1. During heating heat-up interval, switch to tank heat-up when heating heat-up interval ends, and tank temp. < tank set temp. - 3oC (AND solar 3WV OFF if solar priority is set) is fulfilled 2. During tank heat-up interval, switch to heating heat-up when tank heat-up interval ends OR tank temp. > tank set temp. + 2oC (continuously 3 mins) 3. During heating heat-up interval, backup & booster heaters ON/OFF follows normal operation control 4. Once switch to tank heat-up interval, backup & booster heaters OFF and booster heater delay timer start counting. Booster heater ON after delay timer AND tank temp. < tank set temp. If solar priority is not set, solar 3WV ON only after switch to heating heat-up interval.

Operation & Control Setting Water Outlet Temperature (Heat Mode)

Operation & Control Water Temperature Thermo Shift Setting

Operation & Control Indoor Unit Backup Heater Control
1. Normal Heat Mode (i) Backup heater ON condition: - HEATER button is pressed ON - After heatpump ON for 30 mins - After water pump ON for 9 mins - When outdoor ambient temp. < outdoor set temp. for backup heater - When water outlet temp. < water set temp. - 8oC - 20 mins since previous backup heater OFF (ii) Backup heater OFF condition: - When outdoor ambient temp. > outdoor set temp. + 2oC (continuously for 15 secs) - When water outlet temp. > water set temp. + 2oC (continuously for 15 secs) - When switch to tank heat-up interval - Water pump OFF - HEATER button is pressed OFF - Heatpump thermostat OFF - Heatpump OFF 2. Force Heat Mode (i) Backup heater ON condition: - FORCE button is pressed ON - After water pump ON for 9 mins - When water outlet temp. < water set temp. - 8oC - 20 mins since previous backup heater OFF (ii) Backup heater OFF condition: - FORCE button is pressed OFF - When water outlet temp. > water set temp. - 2oC (continuously for 15 secs) When heatpump stops due to error protection (except water outlet temp. sensor error, water inlet temp. sensor error, or flow switch error), backup heater will force ON automatically (even HEATER/FORCE is not selected).

Operation & Control Tank Unit Booster Heater Control
(i) Tank booster heater ON condition: - When tank temp. < tank set temp. - 5oC - 20 mins since previous booster heater OFF - After booster heater delay timer ON during heatpump startup in TANK MODE OR switching from heating heat-up interval to tank heat-up interval in HEAT + TANK MODE (ii) Tank booster heater OFF condition: - When tank temp. > tank set temp. + 2oC (continuously for 15 secs) - When switch from heating heat-up interval to tank heat-up interval BOOSTER HEATER OFF Tank set temp. + 2oC Tank set temp. - 5oC BOOSTER HEATER ON

Operation & Control Sterilization Mode Legionella prevention
1. Sterilization mode can be set from Special Functions setting through indoor unit control panel. 2. During sterilization mode, tank unit will be heat-up to the sterilization set temp. for a certain period of time. 3. Sterilization mode can only be set on TIMER to operate once in a week. 4. During heatpump OFF (standby), and in HEAT/COOL mode, sterilization mode will not start. 5. However, sterilization mode will be cancelled when sterilization set temp. is not achieved after 4 hours. Legionella prevention

Operation & Control Solar Operation Control
SOLAR indication will display when solar priority is set to YES during Special Functions setting from indoor unit control panel

Servicing Mode

Self-diagnosis Method

Heat exchange unit When abnormality occur during operation, the system will stop operation, and OFF/ON LED will blink and error code will display on control panel system error display LCD. Error code is stored in indoor EEPROM. - To reset control panel error code memory STEP: Press and hold ERROR RESET button (< 8 seconds) till a beep sound is heard - To read past error code stored in indoor EEPROM STEP 1: Press CHECK button (> 5 seconds) to enter status mode STEP 2: Press SEARCH UP/DOWN button to retrieve past/last error code STEP 3: Press CANCEL button or wait 30 seconds to exit status mode - To permanently erase error code stored in indoor EEPROM STEP: Press and hold ERROR RESET button (> 8 seconds) till a beep sound is heard System Error Display CHECK Button SEARCH UP/DOWN Button CANCEL Button ERROR RESET Button

Diagnosis Table (Indoor Unit Judgment) Diagnosis Display Abnormality/Protection Control Abnormality Judgment H90 Indoor / outdoor abnormal communication 60 seconds after operation F45 Indoor water outlet temperature sensor abnormality Continue for 5 seconds H23 Indoor refrigerant liquid temperature sensor abnormality H62 Water flow switch abnormality Continue for 10 seconds H76 Indoor - control panel communication abnormality - F37 Indoor water inlet temperature sensor abnormality H12 Indoor / outdoor capacity unmatched 90 seconds after power supply H72 Tank temperature sensor abnormality H70 Indoor backup heater OLP abnormality Continue for 60 seconds H91 Tank booster heater OLP abnormality H99 Indoor heat exchanger freeze prevention

Diagnosis Table (Outdoor Unit Judgment) Diagnosis Display Abnormality/Protection Control Abnormality Judgment H90 Indoor / outdoor abnormal communication 60 seconds after operation H15 Outdoor compressor temperature sensor abnormality Continue for 5 seconds F46 Outdoor current transformer open circuit - F36 Outdoor air temperature sensor abnormality F42 Outdoor heat exchanger temperature sensor abnormality F40 Outdoor discharge pipe temperature sensor abnormality H95 Indoor / outdoor wrong connection H64 Refrigerant high pressure abnormality H42 Compressor low pressure abnormality F27 Pressure switch abnormality Continue for 60 seconds H98 Outdoor high pressure overload protection F15 Outdoor fan motor lock abnormality 2 times within 30 minutes F25 Cooling / heating cycle changeover abnormality 4 times within 30 minutes F41 PFC control 4 times within 10 minutes F24 Refrigerant cycle abnormality 2 times within 20 minutes

Diagnosis Table (Outdoor Unit Judgment) Diagnosis Display Abnormality/Protection Control Abnormality Judgment F14 Outdoor compressor abnormal rotation 4 times in 20 minutes F22 IPM overheating protection 3 times in 30 minutes F20 Outdoor compressor overheating protection 4 times within 30 minutes F16 Total running current protection 3 times within 20 minutes F23 Outdoor DC peak detection 7 times continuously F12 Pressure switch activate 4 times within 20 minutes F43 Outdoor defrost temperature sensor abnormality Continue for 5 seconds F95 Cooling high pressure overload protection -

Connection Capability Rank Abnormality (H12) Malfunction Decision Conditions: During startup operation of cooling and heating, the capability rank of indoor checked by the outdoor is used to determine connection capability rank abnormality. Malfunction Caused: 1. Wrong model interconnected. 2. Wrong indoor unit or outdoor unit PCB (main) used. 3. Faulty indoor unit or outdoor unit PCB (main). Abnormality Judgment: Continue for 90 seconds.

Connection Capability Rank Abnormality (H12) Troubleshooting: Check indoor and outdoor units model number. No Is the indoor and outdoor model number matched? Match the compatible model. Yes Check the spare part numbers of the indoor and outdoor unit PCBs and compare with their Part Lists. No Matched compatibility? Change for specified indoor or outdoor unit PCB (main). Yes Replace the indoor and outdoor unit PCBs (main).

Compressor Tank Temperature Sensor Abnormality (H15) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the compressor tank temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Is the CN-TANK connector connection normal?
Self-diagnosis Method Compressor Tank Temperature Sensor Abnormality (H15) Troubleshooting: Check the CN-TANK connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TANK connector connection normal? - Connector poor contact - Correct the connection Yes Check the compressor tank temperature sensor: - Plug out connector from the outdoor unit PCB (main) - Measure the resistance of the compressor tank temperature sensor Is the measured resistance of the compressor tank temperature sensor matches the value specified in its characteristic chart? - Defect in compressor tank temperature sensor - Replace the compressor tank temperature sensor No Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main)

Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-TH1 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TH1 connector connection normal? - Connector poor contact - Correct the connection Yes Check the indoor refrigerant liquid temperature sensor: - Plug out connector from the indoor unit PCB (main) - Measure the resistance of the indoor refrigerant liquid temperature sensor Is the measured resistance of the indoor refrigerant liquid temperature sensor matches the value specified in its characteristic chart? - Defect in indoor refrigerant liquid temperature sensor - Replace the indoor refrigerant liquid temperature sensor No Yes - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main)

Compressor Low Pressure Protection (H42) Malfunction Decision Conditions: During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29oC or above 26oC is detected by the outdoor pipe temperature sensor. Malfunction Caused: 1. Dust accumulation on the outdoor unit heat exchanger. 2. Air short circuit at outdoor unit. 3. 2 way valve partially closed. 4. Faulty outdoor unit fan motor. 5. Refrigerant shortage (refrigerant leakage). 6. Clogged expansion valve or strainer. 7. Faulty outdoor pipe temperature sensor. 8. Faulty outdoor unit PCB (main).

Compressor Low Pressure Protection (H42) For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Troubleshooting: Check the outdoor unit fan motor operation. No Replace the outdoor unit fan motor and/or outdoor unit PCB (main). Check the dust accumulation on the outdoor unit heat exchanger. Is the outdoor unit fan motor operate normally? Yes Check for gas leakage. Yes Is the outdoor unit heat exchanger dirty? Clean the heat exchanger. - Repair the pipe flare or union nuts Reclaim and recharge refrigerant No Yes Is the oil oozing out from the 2/3 way valve? Check the outdoor air passage. No Check for clogged expansion valve or strainer. Yes Is there any short circuit? Provide sufficient air passage. - Replace the expansion valve and/or strainer Reclaim and recharge refrigerant No Yes Is the expansion valve or strainer clogged (ice formed)? Check the 2-way valve. No Reclaim and recharge for a specified amount of fresh refrigerant. Yes Is the 2 way valve partially closed? Open the 2 way valve. Replace the outdoor unit PCB (main) Replace the outdoor pipe temperature sensor Replace the compressor Yes Is abnormality happened again? No No Procedure complete

Water Flow Switch Abnormality (H62) Malfunction Decision Conditions: During operation of cooling and heating, the water flow detected by the indoor water flow switch is used to determine water flow error. Malfunction Caused: 1. Faulty water pump. 2. Water leak in system. 3. Faulty connector connection. 4. Faulty water flow switch. 5. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 10 seconds (but no judgment for 9 minutes after compressor startup/restart). 7, 9kW : 3.5l/min -> 8l/min 12, 14, 16kW : 4.1l/min -> 15l/min

Water Flow Switch Abnormality (H62) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the system water pump. Is the CN-FLOW connector connection normal? No - Connector poor contact - Correct the connection Yes No Is the water pump working? Replace the faulty water pump. Check the indoor water flow switch: - Plug out connector from the indoor unit PCB (main) - Dismantle the water flow switch - Position the water flow switch in reverse direction (downward) - Measure the continuity of the water flow switch Yes Check the system water passage. Yes Is there any water leakage? Fix the system water leakage. - Defect in indoor water flow switch - Replace the indoor water flow switch Is there any continuity? No No Check the CN-FLOW connector connection: - Turn OFF the power - Check the connector connection Yes - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main)

Outdoor High Pressure Abnormality (H64) Malfunction Decision Conditions: During operation of cooling and heating, when the outdoor high pressure sensor output signal is 0Vdc or 5Vdc. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes.

Outdoor High Pressure Abnormality (H64) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-HPS connector connection: - Turn OFF the power - Check the connector connection Reconnect the high pressure sensor connector to the outdoor unit PCB (main). Turn ON the power and run the system. Measure the DC voltage pin 1 & 3 (GND) of CN-HPS. No Is the CN-HPS connector connection normal? - Connector poor contact - Correct the connection Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main) Check the continuity of the outdoor unit PCB (main) high pressure sensor connector CN-HPS: - Plug out connector from the outdoor unit PCB (main) - Measure the continuity pin 1 & 3 (GND) and pin 1 & 4 (5V) of CN-HPS Is the measured voltage 0Vdc or 5Vdc? No Yes - Defect in outdoor high pressure sensor - Replace the outdoor high pressure sensor - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main) Yes Is there any continuity? No

Indoor Backup Heater OLP Abnormality (H70) Malfunction Decision Conditions: During operation of indoor backup heater, when no power supplies to indoor backup heater or OLP open circuit. Malfunction Caused: 1. Faulty power supply connector connection. 2. Faulty connector connection. 3. Faulty indoor backup heater overload protector (OLP). 4. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 60 seconds.

Indoor Backup Heater OLP Abnormality (H70) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Is the abnormality happened during operation of indoor backup heater? No - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main) Yes Check indoor backup heater OLP continuity: - Turn OFF power supply - Reset heater 1 OLP - Measure the continuity of OLP Multimeter to measure continuity Use a test pen to push this button to reset OLP Check the indoor backup heater incoming AC power supply (2): - Turn ON power supply (2) & RCCB - Measure the AC voltage between RCCB’s L1 & N1 - Measure the AC voltage between PCB’s AC2-L3 & AC2-N2 Is there any continuity? - Defect in RCCB Replace RCCB Terminal board assembly connector poor contact Correct the connection or replace the indoor unit PCB (main) No Is measured voltage 230Vac? - Defect in indoor backup heater OLP - Replace indoor backup heater OLP No Yes Check the CN-OLP1 connector connection: - Turn OFF the power - Check the connector connection - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main) Yes Is the CN-OLP1 connector connection normal? No - Connector poor contact - Correct the connection Yes

Tank Temperature Sensor Abnormality (H72) Malfunction Decision Conditions: When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Is the abnormality happened during tank connection set to ON?
Self-diagnosis Method Tank Temperature Sensor Abnormality (H72) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Is the abnormality happened during tank connection set to ON? No - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main) Yes Check the terminal board assembly no. 15 and no. 16, and CN-TH2 connector connections: - Turn OFF the power - Check the connector connections Is the terminal board assembly no.15 and no. 16, and CN-TH2 connector connections normal? No - Connector poor contact - Correct the connection Yes Check the tank temperature sensor: - Plug out connector from the indoor unit PCB (main) - Measure the resistance of the tank temperature sensor Is the measured resistance of the tank temperature sensor matches the value specified in its characteristic chart? No - Defect in tank temperature sensor - Replace the tank temperature sensor Yes - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main)

Indoor-Control Panel Communication Abnormality (H76) Malfunction Decision Conditions: During standby and operation of cooling and heating, indoor-control panel error occur. Malfunction Caused: 1. Faulty connector connection. 2. Faulty control panel. 3. Faulty indoor unit PCB (main).

Indoor-Control Panel Communication Abnormality (H76) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-REMOTE connector connection: - Turn OFF the power - Check the connector connection Check the DC voltage from the indoor unit PCB (main): - Plug out connector from the indoor unit PCB (main) - Turn ON the power - Measure the DC voltage pin1 & 4 of CN-REMOTE Is the CN-REMOTE connector connection normal? No - Connector poor contact - Correct the connection Yes Is the remote controller (control panel) voltage 5Vdc (pin1 & 4) generated? - Defect in remote controller (control panel) - Replace the remote controller (control panel) Check the control panel cable connection. Yes No - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main) Is the control panel cable connection normal? No - Defect in cable connection - Replace control panel cable Yes

Indoor/Outdoor Abnormal Communication (H90) Malfunction Decision Conditions: During operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused: 1. Faulty outdoor unit PCB (main). 2. Faulty indoor unit PCB (main). 3. Indoor-outdoor signal transmission error due to wrong wiring. 4. Indoor-outdoor signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units. 5. Indoor-outdoor signal transmission error due to disturbed power supply waveform. Abnormality Judgment: Continue for 1 minute after operation.

Indoor/Outdoor Abnormal Communication (H90) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the indoor-outdoor units connection wires. Yes Is there any wiring error? Correct the indoor-outdoor units connection wires. No Turn OFF the power and disconnect terminal 3 wire. Turn ON the power and measure Vdc between terminal 2 & 3 from the outdoor unit. No Is the Vdc fluctuate between 45-60Vdc? Replace the outdoor unit PCB (main). Yes Turn OFF the power and reconnect terminal 3 wire. Turn ON the power and again measure Vdc between terminal 2 & 3 from the outdoor unit. No Is the Vdc fluctuate between 15-60Vdc? Replace the indoor unit PCB (main).

Tank Booster Heater OLP Abnormality (H91) Malfunction Decision Conditions: During operation of tank booster heater, and tank booster heater OLP open circuit. Malfunction Caused: 1. Faulty connector connection. 2. Faulty tank booster heater overload protector (OLP). 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 60 seconds.

Tank Booster Heater OLP Abnormality (H91) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Is the abnormality happened during operation of tank booster heater? No - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main) Yes Check the CN-OLP2 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-OLP1 connector connection normal? - Connector poor contact - Correct the connection Yes Multimeter to measure continuity Use a test pen to push this button to reset OLP Check tank booster heater OLP continuity: - Turn OFF power supply - Reset tank booster heater OLP - Measure the continuity of OLP Is there any continuity? No - Defect in tank booster heater OLP - Replace tank booster heater OLP Yes - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main)

Unspecified Voltage between Indoor and Outdoor (H95) Malfunction Decision Conditions: The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused: 1. Insufficient power supply. 2. Faulty outdoor unit PCB (noise filter/main).

Unspecified Voltage between Indoor and Outdoor (H95) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the supply voltage - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main) Is the measured AC voltage 230V? No Supply voltage as specified? No Correct the power supply. Yes Yes Check the rectification voltage between DCP & DCN. Check the AC voltage from outdoor unit PCB (noise filter): - Turn OFF the power - Plug out connector AC-BLK, CN-BLK & CN-WHT from the outdoor unit PCB (noise filter) - Turn ON the power - Measure the AC voltage between AC-BLK & CN-WHT - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main) Is the measured voltage between DCP & DCN ~325Vdc? No Yes - Defect in outdoor unit PCB (noise filter) - Replace the outdoor unit PCB (noise filter) Check the DC filter (capacitor) PCB connector connection. Is the measured AC voltage 230V? No Yes Is the DC filter (capacitor) PCB connector connection normal? No Check the AC voltage supply to outdoor unit PCB (main): - Turn OFF the power - Reconnect connector AC-BLK, CN-BLK & CN-WHT to the outdoor unit PCB (noise filter) - Turn ON the power - Measure the AC voltage between AC-BLK & CN-WHT - Connector poor contact - Correct the connection Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main)

Outdoor High Pressure Protection (H98) Malfunction Decision Conditions: During operation of heating, when pressure 4.0MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: 1. Faulty water pump. 2. Insufficient water flow rate in system. 3. Water leak in system. 4. 2/3 way closed. 5. Clogged expansion valve or strainer. 6. Excessive refrigerant. 7. Faulty outdoor high pressure sensor. 8. Faulty outdoor unit PCB (main).

Outdoor High Pressure Protection (H98) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the 2/3 way valve. Check the system water pump. Yes No Is the 2/3 way valve closed? Open the 2/3 way valve. Is the water pump working? Replace the faulty water pump. No Yes Check for clogged expansion valve or strainer. Check the system water flow rate. - Replace the expansion valve and/or strainer Reclaim and recharge refrigerant Yes Is the expansion valve or strainer clogged (ice formed)? Is the water pump speed adjusted according to system hydraulic external static pressure? No Readjust the water pump speed. No Check refrigerant amount. Yes Check the system water passage. Is the additional refrigerant amount filled correctly? No Reclaim and recharge with correct amount of refrigerant. Yes Is there any water leakage? Fix the system water leakage. Yes - Replace the outdoor unit PCB (main) Replace the outdoor high pressure sensor No

Indoor Freeze-up Protection (H99) Malfunction Decision Conditions: During anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature < 0oC. Malfunction Caused: 1. Faulty water pump. 2. Insufficient water flow rate in system. 3. Water leak in system. 4. 2 way valve partially closed. 5. Clogged expansion valve or strainer. 6. Refrigerant shortage (refrigerant leakage). 7. Faulty indoor refrigerant liquid temperature sensor. 8. Faulty indoor unit PCB (main).

Indoor Freeze-up Protection (H99) For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Troubleshooting: Check the system water pump. Check for clogged expansion valve or strainer. Is the water pump working? No Replace the faulty water pump. - Replace the expansion valve and/or strainer Reclaim and recharge refrigerant Yes Is the expansion valve or strainer clogged (ice formed)? Yes Check the system water flow rate. No Check refrigerant amount. Is the water pump speed adjusted according to system hydraulic external static pressure? No Readjust the water pump speed. No Is the additional refrigerant amount filled correctly? Reclaim and recharge with correct amount of refrigerant. Yes Check the system water passage. Yes Check the indoor refrigerant liquid temperature sensor. Yes Is there any water leakage? Fix the system water leakage. Does it conform to the sensor characteristic chart? No Check the 2 way valve. Yes Replace the indoor unit PCB (main). No Is the 2 way valve partially closed? Yes Open the 2 way valve. Replace the indoor refrigerant liquid temperature sensor. No

Outdoor High Pressure Switch Activate (F12) Malfunction Decision Conditions: During operation of cooling and heating, when pressure 4.5MPa and above is detected by outdoor high pressure switch. Malfunction Caused: 1. Dust accumulation on the outdoor unit heat exchanger. 2. Air short circuit at outdoor unit. 3. Faulty water pump. 4. Insufficient water flow rate in system. 5. Water leak in system. 6. 2/3 way valve closed. 7. Clogged expansion valve or strainer. 8. Excessive refrigerant. 9. Faulty outdoor high pressure sensor and switch. 10. Faulty outdoor unit PCB. Abnormality Judgment: Continue 4 times in 20 minutes.

Outdoor High Pressure Switch Activate (F12) For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Troubleshooting: Check the dust accumulation on the outdoor unit heat exchanger. Check the 2/3 way valve. Yes Is the outdoor unit heat exchanger dirty? Clean the heat exchanger. Is the 2/3 way valve closed? Yes Open the 2/3 way valve. No No Check the outdoor air passage. Check the system water passage. - Fix the system water leakage - Replace outdoor high pressure sensor Yes Is there any short circuit? Yes Provide sufficient air passage. Is there any water leakage? No No Check the system water pump. - Replace the expansion valve and/or strainer Reclaim and recharge refrigerant - Replace outdoor high pressure sensor Check for clogged expansion valve or strainer. Yes - Replace the faulty water pump - Replace outdoor high pressure sensor Is the water pump working? No Is the expansion valve or strainer clogged (ice formed)? Yes No Check the system water flow rate. - Reclaim and recharge with correct amount of refrigerant - Replace outdoor high pressure sensor Check refrigerant amount. No Is the water pump speed adjusted according to system hydraulic external static pressure? - Readjust the water pump speed - Replace outdoor high pressure sensor No Is the additional refrigerant amount filled correctly? - Replace the outdoor unit PCB (main) Replace the outdoor high pressure sensor and switch Yes Yes

Compressor Rotation Failure (F14) Malfunction Decision Conditions: A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused: 1. Compressor terminal disconnect. 2. Faulty outdoor unit PCB (main). 3. Faulty compressor. Abnormality Judgment: Continue 4 times in 20 minutes.

Compressor Rotation Failure (F14) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the U, V, and W connector connection: - Turn OFF the power - Check the U, V, and W connector connection at outdoor unit PCB (main) and compressor terminal Is the connector connection normal? No - Connector poor contact - Correct the connection Outdoor unit PCB (main) Compressor terminal Yes Disconnect the harnesses U, V, and W from the compressor terminal. Inverter checker From the disconnected harnesses U, Y, and W, connect them to the inverter checker. Turn ON the power and operate the system. Check the inverter checker 6 LEDs blinking condition. Is the blinking of the 6 LEDs in same sequence/condition? No IPM defective Replace the outdoor unit PCB (main) Yes Replace the compressor.

Outdoor Fan Motor (DC Motor) Mechanism Locked (F15) Malfunction Decision Conditions: The rotation speed detected by the Hall IC of the fan motor during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm). Malfunction Caused: 1. Operation stop due to short circuit inside the fan motor winding. 2. Operation stop due to breaking of wire inside the fan motor. 3. Operation stop due to breaking of fan motor lead wires. 4. Operation stop due to fan motor Hall IC malfunction. 5. Operation error due to faulty outdoor unit PCB. Abnormality Judgment: Continue 2 times in 30 minutes.

Outdoor Fan Motor (DC Motor) Mechanism Locked (F15) For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Troubleshooting: Turn OFF the power and rotate the fan by hand. Turn OFF the power and disconnect the fan motor connector. Turn ON the power. Does the fan rotate smoothly? No Replace the fan motor. Yes Check the output of the fan motor from outdoor unit PCB (main). Turn ON the power and operate the fan motor. No Is the fan motor power supply voltage ~325Vdc (pin1 & 4) generated? No Does it rotate? Replace the outdoor unit PCB (main). Yes Yes Stop the fan motor. Is the fan motor control voltage 15Vdc (pin5 & 4) generated? No Replace the outdoor unit PCB (main). Check the rotation feedback output from the fan motor. Yes Operate the fan motor, is the rotation command voltage 1-5Vdc (pin7 & 4) generated? No Replace the outdoor unit PCB (main). Rotate the fan motor by hand, is the rotation feedback voltage 15Vdc (pin6 & 4) generated? No Replace the fan motor. Yes Replace the fan motor. Yes Replace the outdoor unit PCB (main).

Input Over Current Detection (F16) Malfunction Decision Conditions: During operation of cooling and heating, when outdoor current above 27.9A is detected by the current transformer (CT) in the outdoor unit PCB. Malfunction Caused: 1. Excessive refrigerant. 2. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 20 minutes.

Input Over Current Detection (F16) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Get restarted and measure the AC current from the outdoor LIVE terminal. Is the measured AC current over 27.9A? No Replace the outdoor unit PCB (main). Yes Check refrigerant amount. Excess refrigerant? Yes Reclaim and recharge with correct amount of refrigerant. No Replace the outdoor unit PCB (main).

Compressor Overheating (F20) Malfunction Decision Conditions: During operation of cooling and heating, when temperature above 112oC is detected by the compressor tank temperature sensor. Malfunction Caused: 1. Faulty compressor tank temperature sensor. 2. 2/3 way valve closed. 3. Refrigerant shortage (refrigerant leakage). 4. Clogged expansion valve or strainer. 5. Faulty outdoor unit PCB (main). 6. Faulty compressor. Abnormality Judgment: Continue 4 times in 30 minutes.

Compressor Overheating (F20) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the compressor tank temperature sensor. Check for clogged expansion valve or strainer. No Does it conform to the sensor characteristic chart? Replace the compressor tank temperature sensor. Yes - Replace expansion valve and/or strainer Reclaim and recharge refrigerant Yes Is the expansion valve or strainer clogged (ice formed)? Check the 2/3 way valve. No Yes Reclaim and recharge for a specified amount of fresh refrigerant. Is the 2/3 way valve closed? Open the 2/3 way valve. No Is abnormality happened again? Yes Replace the outdoor unit PCB (main) Replace the compressor Check for gas leakage. No Procedure complete - Repair the pipe flare or union nuts Reclaim and recharge refrigerant Is the oil oozing out from the 2/3 way valve? Yes No

IPM Overheating (F22) Malfunction Decision Conditions: During operation of cooling and heating, when temperature 95oC is detected by the outdoor IPM temperature sensor. Malfunction Caused: 1. Faulty outdoor unit fan motor. 2. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 30 minutes.

IPM Overheating (F22) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the outdoor unit installation condition. Yes Is there any improper heat radiation? - Reinstall the outdoor unit - Remove the obstacle(s) No No Is the outdoor unit fan motor operating? Replace the outdoor unit fan motor. Yes - Defect in IPM - Replace the outdoor unit PCB (main)

Output Over Current Detection (F23) Malfunction Decision Conditions: During operation of cooling and heating, when outdoor DC current is above 40.1 ± 5.0A (for: UD07~09CE) OR 44.7 ± 5.0A (for: UD12~16CE) is detected by the IPM DC Peak sensing circuitry in the outdoor unit PCB (main). Malfunction Caused: 1. Faulty outdoor unit PCB (main). 2. Faulty compressor. Abnormality Judgment: Continue for 7 times.

Are the compressor’s winding resistance (U-V, V-W, or U-W) shorted?
Self-diagnosis Method Output Over Current Detection (F23) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the compressor winding resistance: - Turn OFF the power and disconnect the harnesses U, V, and W - Measure the winding resistance between U-V, V-W, and W-U Are the compressor’s winding resistance (U-V, V-W, or U-W) shorted? Yes - Compressor defective due to winding shorted - Replace the compressor No - Outdoor electronic circuit defect due to power transistor shorted - Replace the outdoor unit PCB (main)

Refrigeration Cycle Abnormality (F24) Malfunction Decision Conditions: 1. During operation of cooling and heating, compressor frequency > Frated. 2. During operation of cooling and heating, running current: 0.65A < I < 1.65A. 3. During operation of cooling, water inlet temperature - indoor refrigerant liquid temperature < 5oC. 4. During operation of heating, indoor refrigerant liquid temperature - water inlet temperature < 5oC. Malfunction Caused: 1. Faulty water inlet or indoor refrigerant liquid temperature sensors. 2. 2/3 way valve closed. 3. Refrigerant shortage (refrigerant leakage). 4. Clogged expansion valve or strainer. 5. Faulty outdoor unit PCB (main). 6. Poor compression of compressor. Abnormality Judgment: Continue 2 times in 20 minutes.

Refrigeration Cycle Abnormality (F24) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the water inlet and indoor ref. liquid temperature sensors. No Does it conform to the sensor characteristic chart? Replace the water inlet or indoor ref. liquid temperature sensor. Check for clogged expansion valve or strainer. Yes - Replace expansion valve and/or strainer Reclaim and recharge refrigerant Yes Check the 2/3 way valve. Is the expansion valve or strainer clogged (ice formed)? No Yes Is the 2/3 way valve closed? Open the 2/3 way valve. Reclaim and recharge for a specified amount of fresh refrigerant. No Yes Replace the outdoor unit PCB (main) Replace the compressor Check for gas leakage. Is abnormality happened again? No - Repair the pipe flare or union nuts Reclaim and recharge refrigerant Yes Procedure complete Is the oil oozing out from the 2/3 way valve? No

Four Way Valve Abnormality (F25) Malfunction Decision Conditions: 1. During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0oC. 2. During cooling operation, when the indoor pipe temperature of thermostat ON indoor unit > 45oC. Malfunction Caused: 1. Faulty sensor. 2. Faulty connector connection. 3. Faulty outdoor unit PCB (noise filter/main). 4. Faulty four way valve. Abnormality Judgment: Continue 4 times in 30 minutes.

Four Way Valve Abnormality (F25) For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Troubleshooting: Yes Four way valve coil disconnected (loose)? Correct the four way valve coil. Check the indoor pipe temperature sensor. No Yes Is the harness out of the CN-HOT connector? Reconnect the harness. No Does it conform to the sensor characteristic chart? Replace the indoor pipe temperature sensor. No Check the continuity of the four way valve coil. Yes Is F25 occur during heating operation? Yes Disconnect the harness from the CN-HOT connector. Resistance between harness about 1.52k ohm? No Replace the four way valve coil. No Is the four way valve coil energize during cooling operation? Yes Replace the outdoor unit PCB (noise filter/main). Yes Measure AC voltage supply to CN-HOT (pin1 & 3) during heating operation. No Replace the four way valve. Is the voltage supply to four way valve 230Vac? No Replace the outdoor unit PCB (noise filter/main). Yes Replace the four way valve.

Outdoor High Pressure Switch Abnormal (F27) Malfunction Decision Conditions: During compressor stop, and outdoor high pressure switch is remain opened. Malfunction Caused: 1. Faulty connector connection. 2. Faulty switch. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 1 minute.

Outdoor High Pressure Switch Abnormal (F27) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-PSW1 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-PSW1 connector connection normal? - Connector poor contact - Correct the connection Yes Check the continuity of the outdoor high pressure switch: - Plug out outdoor high pressure switch connector from CN-PSW1 channel - Measure the connector continuity (normally close) Multimeter - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main) Is there any continuity? Yes No - Defect in outdoor high pressure switch - Replace the outdoor high pressure switch

Outdoor Air Temperature Sensor Abnormality (F36) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Is the CN-TH1 connector connection normal?
Self-diagnosis Method Outdoor Air Temperature Sensor Abnormality (F36) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-TH1 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TH1 connector connection normal? - Connector poor contact - Correct the connection Yes Check the outdoor air temperature sensor: - Plug out connector from the outdoor unit PCB (main) - Measure the resistance of the outdoor air temperature sensor Is the measured resistance of the outdoor air temperature sensor matches the value specified in its characteristic chart? - Defect in outdoor air temperature sensor - Replace the outdoor air temperature sensor No Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main)

Indoor Water Inlet Temperature Sensor Abnormality (F37) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water inlet temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Self-diagnosis Method Indoor Water Inlet Temperature Sensor Abnormality (F37) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-TH1 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TH1 connector connection normal? - Connector poor contact - Correct the connection Yes Check the indoor water inlet temperature sensor: - Plug out connector from the indoor unit PCB (main) - Measure the resistance of the indoor water inlet temperature sensor Is the measured resistance of the indoor water inlet temperature sensor matches the value specified in its characteristic chart? - Defect in indoor water inlet temperature sensor - Replace the indoor water inlet temperature sensor No Yes - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main)

Outdoor Discharge Pipe Temperature Sensor Abnormality (F40) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Is the CN-DIS connector connection normal?
Self-diagnosis Method Outdoor Discharge Pipe Temperature Sensor Abnormality (F40) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-DIS connector connection: - Turn OFF the power - Check the connector connection No Is the CN-DIS connector connection normal? - Connector poor contact - Correct the connection Yes Check the outdoor discharge pipe temperature sensor: - Plug out connector from the outdoor unit PCB (main) - Measure the resistance of the outdoor discharge pipe temperature sensor Is the measured resistance of the outdoor discharge pipe temperature sensor matches the value specified in its characteristic chart? - Defect in outdoor discharge pipe temperature sensor - Replace the outdoor discharge pipe temperature sensor No Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main)

Power Factor Correction (PFC) Abnormality (F41) Malfunction Decision Conditions: During operation of cooling and heating, when the PFC protection circuitry in the outdoor unit PCB (main) senses abnormal high DC voltage level. Malfunction Caused: 1. Power supply surge. 2. Compressor windings not uniform. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 10 minutes.

Power Factor Correction (PFC) Abnormality (F41) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the compressor winding resistance: - Turn OFF the power supply and disconnect the harnesses U, V, and W - Measure the winding resistance between U-V, V-W, and W-U Check the supply voltage. No Supply voltage as specified? Correct the power supply. Yes Are the compressor’s winding resistance (U-V, V-W, U-W) uniform? Operate the system. Verify PFC abnormality by measuring the DC voltage between DCP-OUT and DCN-OUT of the outdoor unit PCB (main). No Replace the compressor. Is the DC voltage between DCP-OUT and DCN-OUT normal (between Vdc)? Yes - Defect in PFC circuitry - Replace the outdoor unit PCB (main) Yes Replace the outdoor unit PCB (main). No

Outdoor Pipe Temperature Sensor Abnormality (F42) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Self-diagnosis Method Outdoor Pipe Temperature Sensor Abnormality (F42) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-TH1 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TH1 connector connection normal? - Connector poor contact - Correct the connection Yes Check the outdoor pipe temperature sensor: - Plug out connector from the outdoor unit PCB (main) - Measure the resistance of the outdoor pipe temperature sensor Is the measured resistance of the outdoor pipe temperature sensor matches the value specified in its characteristic chart? - Defect in outdoor pipe temperature sensor - Replace the outdoor pipe temperature sensor No Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main)

Outdoor Defrost Temperature Sensor Abnormality (F43) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the outdoor defrost temperature sensor are used to determine sensor errors. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Self-diagnosis Method Outdoor Defrost Temperature Sensor Abnormality (F43) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-TH2 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TH2 connector connection normal? - Connector poor contact - Correct the connection Yes Check the outdoor defrost temperature sensor: - Plug out connector from the outdoor unit PCB (main) - Measure the resistance of the outdoor defrost temperature sensor Is the measured resistance of the outdoor defrost temperature sensor matches the value specified in its characteristic chart? - Defect in outdoor defrost temperature sensor - Replace the outdoor defrost temperature sensor No Yes - Defect in outdoor unit PCB (main) - Replace the outdoor unit PCB (main)

Indoor Water Outlet Temperature Sensor Abnormality (F45) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor error. Malfunction Caused: 1. Faulty connector connection. 2. Faulty sensor. 3. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.

Self-diagnosis Method Indoor Water Outlet Temperature Sensor Abnormality (F45) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the CN-TH1 connector connection: - Turn OFF the power - Check the connector connection No Is the CN-TH1 connector connection normal? - Connector poor contact - Correct the connection Yes Check the indoor water outlet temperature sensor: - Plug out connector from the indoor unit PCB (main) - Measure the resistance of the indoor water outlet temperature sensor Is the measured resistance of the indoor water outlet temperature sensor matches the value specified in its characteristic chart? - Defect in indoor water outlet temperature sensor - Replace the indoor water outlet temperature sensor No Yes - Defect in indoor unit PCB (main) - Replace the indoor unit PCB (main)

Outdoor Current Transformer Open Circuit (F46) Malfunction Decision Conditions: A current transformer (CT) open circuit is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (< 0.65A) for continuously 20 seconds. Malfunction Caused: 1. CT defective. 2. Faulty outdoor unit PCB (main). 3. Compressor defective (low compression). Abnormality Judgment: Continue 3 times in 20 minutes.

Outdoor Current Transformer Open Circuit (F46) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Measure the current from the outdoor LIVE terminal. Operate heating operation. When F46 occurs again, turn OFF the power. No - Defect in CT - Replace the outdoor unit PCB (main) Is the current < 0.65A? Check the 2/3 way valve. Yes While the system is still in heating operation, check the discharge pressure. Is the 2/3 way valve closed? Yes Open the 2/3 way valve. No Is the pressure unchanged (same as when compressor stop)? No Replace the outdoor unit PCB (main). Check for gas leakage. Yes - Repair the pipe flare or union nuts Reclaim and recharge refrigerant Yes While the system is still in heating operation, further check (by touching) if: Compressor discharge pipe is cold Compressor body is warm to confirm the compressor low compression. Is the oil oozing out from the 2/3 way valve? No Turn ON the power, and operate heating operation. Yes Replace the compressor.

Cooling High Pressure Overload Protection (F95) Malfunction Decision Conditions: During operation of cooling, when pressure 4.0MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: 1. Dust accumulation in the outdoor unit heat exchanger. 2. Air short circuit at outdoor unit. 3. 2 way valve closed. 4. Faulty outdoor unit fan motor. 5. Clogged expansion valve or strainer. 6. Excessive refrigerant. 7. Faulty outdoor high pressure sensor. 8. Faulty outdoor unit PCB (main).

Cooling High Pressure Overload Protection (F95) Troubleshooting: For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component. Check the outdoor unit fan motor operation. Check the dust accumulation on the outdoor unit heat exchanger. Is the outdoor unit fan motor operate normally? No Replace the outdoor unit fan motor and/or outdoor unit PCB (main). Yes Is the outdoor unit heat exchanger dirty? Clean the heat exchanger. Yes Check for clogged expansion valve or strainer. No Check the outdoor air passage. - Replace the expansion valve and/or strainer Reclaim and recharge refrigerant Is the expansion valve or strainer clogged (ice formed)? Yes Yes Is there any short circuit? Provide sufficient air passage. No Check refrigerant amount. No Check the 2 way valve. No Is the additional refrigerant amount filled correctly? Reclaim and recharge with correct amount of refrigerant. Yes Is the 2 way valve closed? Open the 2 way valve. Yes - Replace the outdoor unit PCB (main) Replace the outdoor high pressure sensor No

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Air-to-Water Heatpump Product Training

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