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TROUBLE SHOOTING (Cycle Part) 1. Error Display 1) The Meaning of the First Alphabet EPUA Error concluded by self-diagnosis E101~E700 Detailed item refers.

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Presentation on theme: "TROUBLE SHOOTING (Cycle Part) 1. Error Display 1) The Meaning of the First Alphabet EPUA Error concluded by self-diagnosis E101~E700 Detailed item refers."— Presentation transcript:

1 TROUBLE SHOOTING (Cycle Part) 1. Error Display 1) The Meaning of the First Alphabet EPUA Error concluded by self-diagnosis E101~E700 Detailed item refers error code Pre Error Code P701~P800 Items that need more than 2 times detection to conclude through error The address of Outdoor Unit occurred error U200 : Main Unit U201 : Sub1 Unit U202 : Sub2 Unit U203 : Sub3 Unit The address of Indoor Unit occurred error A047 : Error Occurred At Indoor Unit Whose address 47 2) Error Display method Error TypeError Display MethodExamples Error Occurred at Indoor Unit Error Number →Address of Indoor unit → Error Number (repeat indication) E471→A002→E471→A002 Error Occurred at Outdoor Unit or Other Error Error Number →Address of Outdoor unit → Error Number (repeat indication) E471→U200→E471→U200 ○ In case of several Error should be registered at the same time, Indicator will display one error whose priority is highest. ( Refer Error Code Table to know priority order ) ○ When the same Error Occurred in several Indoor Units, Indicator will display one address of indoor unit whose address number is lowest.

2 TROUBLE SHOOTING (Cycle Part) Error Code (Priority Order)Error Details E221Short or Open of the Outdoor air temperature sensor E251Short or Open of the discharge temperature sensor of Digital compressor E256Short or Open of the discharge temperature sensor of Fixed compressor 1 E257Short or Open of the discharge temperature sensor of Fixed compressor 2 E258Short or Open of the discharge temperature sensor of Fixed compressor 3 E291Short or Open of the high pressure sensor E296Short or Open of the low pressure sensor E271Short or Open of the Sump. Temperature sensor of the compressor 1 E231Short or Open of the Cond. out temperature Sensor E307Short or Open of the Oil balance temperature Sensor1 E308Short or Open of the Suction temperature sensor E311Short or Open of the sub cooler temperature sensor E425Reverse Phase or Phase Open E452Voltage Dip Error E440 Stop Operating Heating mode when Outdoor temperature is over 30 ℃ E442 Stop Operating Heating charging mode when Outdoor temperature is over 15 ℃ E443Stop Operation by Low Pressure E431Self diagnosis failure of Oil balance valve 1 E202No response error after tracking is completed E201 Communication error among outdoor units and indoor units (Pre-tracking failure or setup indoor unit number is different from the real)

3 TROUBLE SHOOTING (Cycle Part) Error Code (Priority Order)Error Details E203Communication error between Outdoor unit’s main and sub MICOM or among outdoor Units E407Comp down By high pressure E410Comp down By low pressure E403Comp down By Anti-freezing control E413Comp down By Sump Protection Control E554Loading failure E416Comp down by compressor discharge temperature E241Cond. out temperature Sensor breakaway E269Suction temperature Sensor breakaway E453Error of Fan Motor’s high temperature E454Fan motor RPM Error E455Error of fan motor IPM high temperature E458CT over current E457Error of fan motor’s reverse revolution E162Outdoor Unit’s EEPROM Error E560Switch Option Set up Error E428Comp down by compression ratio control E121Short or Open of indoor unit’s air temperature sensor E122Indoor Unit EVA in Sensor’s Short or open E123Indoor Unit EVA out Sensor’s Short or open

4 TROUBLE SHOOTING (Cycle Part) Error Code (Priority Order)Error Details E154Indoor Unit’s Fan Error E124Communication error message sent from the indoor unit E153Indoor Unit Floating S/W error (2 nd check) P701Indoor Unit Floating S/W error (1 st check) E152Indoor Unit EEV Closing error (2 nd check) P702Indoor Unit EEV Closing error (1 st check) E151Indoor Unit EEV opening error (2 nd check) P703Indoor Unit EEV opening error (1 st check) E128Indoor Unit EVA in Sensor Breakaway E129Indoor Unit EVA Out Sensor Breakaway E131Indoor Unit Heater Sensor Breakaway E265Sump temperature Sensor of Digital Comp. or Fixed Comp.1 Breakaway E267Fixed Comp.2 Sump’s Temperature Sensor Breakaway E268Fixed Comp.3 Sump’s Temperature Sensor Breakaway E262Fixed Comp.1 Discharge’s Temperature Sensor Breakaway E263Fixed Comp.2 Discharge’s Temperature Sensor Breakaway E264Fixed Comp.3 Discharge’s Temperature Sensor Breakaway E456Fan Motor Over Current Error E461CT Low Current CHStop Operating the unit when the crank case heater is on

5 TROUBLE SHOOTING (Cycle Part) E440, E442 : E440 Stop Operating Heating mode when Outdoor temperature is over 30 ℃ E442 Stop Operating Heating charging mode when Outdoor temperature is over 15 ℃ Decision MethodE440 : Just before outdoor unit operates in heating mode, Outdoor air temperature sensor reading over 30 ℃ E442 : Just before outdoor unit operates in heating charging mode by key mode(K1 S/W in the outdoor unit’s PCB ), Outdoor air temperature sensor reading over 15 ℃ Possible CauseIt is not error of product. (spec. to protect products) It is desired that refer and use working conditions range of temperature. If the value of outdoor air temperature sensor is different from the real, please replace the outdoor air temperature sensor with new one.

6 TROUBLE SHOOTING (Cycle Part) E443: E443Stop Operation by Low Pressure Decision Method If the low pressure of the main unit is below 3.1kgf/ ㎠ G for 3 seconds continuously In cooling mode before Pump down start, Stop operation If the low pressure of the main unit is below 2.6kgf/ ㎠ G for 3 seconds continuously In Heating mode before Pump down start, Stop operation Possible CauseRefrigerant Leakage Low pressure sensor breakdown Action1.Measure the low pressure using manifold gage 2.Read the low pressure of the system using S-NET or View mode 3.Compare the value of case1 with case2. 4.If these value are similar, most of refrigerant is leaked. Please emit remainder refrigerant and do re-vacuum & re-charging 5.If these value are different greatly, please check the connector of the low pressure sensor or replace the low pressure sensor with new one Attention : After recovery of refrigerant (Pump down), because refrigerant fills only in outdoor heat exchanger, preceding descriptions error can arise. In this case, If you open service valve after connecting pipe normally with indoor unit, error will be eliminated because refrigerant circulates to low-pressure side.

7 TROUBLE SHOOTING (Cycle Part) E431: E431Self diagnosis failure of Oil balance valve 1 Decision Method1. No check in case that one outdoor unit is installed 2. In module application, check the condition of Oil balance valve 1 or senor breakaway 3. When hot gas engaged after close the Oil balance valve 1, if the temperature of oil balance tube arise over 5 ℃, display error (Valve Is not closed) 4. During Oil balance operation with the Oil balance valve 1 open, if the temperature of oil balance tube doesn’t change over 7 ℃, display error (Valve Is not open) Possible CauseTemperature Sensor of Oil balance valve 1 breakaway Malfunction of Oil balance valve 1 Solenoid coil of electric connection badness Action1.Check the temperature sensor is inserted correctly in sensor holder 2.Check the value of the temperature sensor is proper 3.Check the oil service valve is open 4.Check the solenoid Coil of the valve is properly installed 5.Check the resistance of the Coil (Was it not short-circuited?) 6.Replace the Oil Valve with new one Attention : Never use welding machine when cut off the oil valve, Do use Tube cutter. ( there is danger of production of fire because oil fills in pipe )

8 TROUBLE SHOOTING (Cycle Part) E407: E407Comp down By high pressure Decision Method The Value of the high pressure sensor is over 41kgf/ ㎠ Possible Cause Outdoor Unit’s fan motor breakdown or restriction, Fan motor Driver wire is bad or open Outdoor Heat exchanger contamination, Service Valve is closed, Excessive refrigerant Indoor Unit’s fan motor breakdown or restriction Indoor unit’s fan motor capacitor badness or connecting wire open Service Valve is closed, Excessive refrigerant Action1.Check the service valve is open 2.Check the value of the high pressure sensor is proper using manifold gage 3.Check the EEV of both indoor unit and outdoor unit 4.Check the fan operation 5.Confirm refrigerant quantity

9 TROUBLE SHOOTING (Cycle Part) E410: E410 Comp down By low pressure Decision Method If the low pressure of the main unit is below 2.6kgf/ ㎠ G In cooling mode, Stop operation If the low pressure of the main unit is below 1.4kgf/ ㎠ G In Heating mode, Stop operation Possible CauseRefrigerant shortage, EEV choked, Service valve Closed, Compressor Unloading badness, Leakage of discharge check valve of stopped unit Working conditions deviation ; Outdoor temperature is below -5 ℃ Outdoor temperature is below -20 ℃ Action1.Check the service valve is open 2.Check the value of the low pressure sensor is proper using manifold gage 3.Check the EEV of both indoor unit and outdoor unit 4.Check the fan operation 5.Confirm refrigerant quantity

10 TROUBLE SHOOTING (Cycle Part) E403: E403 Comp down By Anti-freezing control Decision Method The temperature of the operating indoor unit’s heat exchanger keeps below -4 ℃ (more than 5 minutes) Possible CauseEEV does not work properly Indoor unit fan motor restriction or badness Air filter of the indoor unit is choked severely Action1.Removes obstacle and cleans dust filter. Error reset (K3) 2.Operate the only relevant indoor unit and check the fan operation 3.Check the PCB & motor 4.Check the Pressure 5.Confirm refrigerant quantity

11 TROUBLE SHOOTING (Cycle Part) E413: E413 Comp down By Sump Protection Control Decision Method The temperature of Sump keeps below 95 ℃ (more than 5 minutes) Possible CauseCompressor Loading badness Sump temperature sensor badness Action1.Connect the S-Net 2.Check the operation of PWM Valve (normal loading/unloading) 3.Check the attachment status of sump temperature sensor 4.Take the sump sensor apart from the compressor and leave it alone in ambient air for about 10 minutes, and check the value of the sump sensor is similar with the ambient air temperature. 5.Replace sump sensor

12 TROUBLE SHOOTING (Cycle Part) E416: E416 Comp down by compressor discharge temperature Decision Method The value of discharge temperature sensor is over 135 ℃ Possible CauseRefrigerant Shortage, EEV Choking, Service valve is closed, Sensor badness, Liquid EEV badness, Liquid Tube Valve badness, Leakage of discharge check valve of stopped unit Action1.Check the resistance of the discharge temperature sensor (refer E251) 2.Check the Service Valve is open 3.Check the EEV Operation 4.In case of partial outdoor units are operated, Check leakage from liquid tube valve or discharge check valve of no-operating outdoor units 5.Confirm refrigerant quantity

13 TROUBLE SHOOTING (Cycle Part) E241: E241 Cond. out temperature Sensor breakaway Decision MethodNo Check in cooling mode In Heating mode, it must satisfy below conditions simultaneously (more than 20min.) 1. average high pressure : 25kgf/ ㎠ G 2. average low pressure : 8.5kgf/ ㎠ G 3. Teva,out – Tair,in ≥ 3 ℃ 4. Teva,in – Tair,in ≥ 2 ℃ 5. Tcond,out – Tair,out ≤ -2 ℃ 6. All Compressor Operation & All indoor Unit operation (thermo on) Possible CauseCond. Out sensor breakaway or badness Outdoor heat exchanger path pipe is choked Action1.Check the temperature sensor is inserted correctly in sensor holder 2.Check the resistance of the discharge temperature sensor (refer E231) 3.Is change in sensor value at heating operation after stop? Replace Heat exchanger assembly with new one.

14 TROUBLE SHOOTING (Cycle Part) E269: E269Suction temperature Sensor breakaway Decision MethodTsuc,ini ; Suction temperature of the compressor on the verge of operation Tsuc,real ; Suction temperature of the compressor operating now | Tsuc,real - Tsuc,ini | < 2 ℃ (more than 30 min.) Possible CauseSuction temperature sensor breakaway or badness Action1.Check the temperature sensor is inserted correctly in sensor holder 2.Check the resistance of the discharge temperature sensor (refer E231)

15 TROUBLE SHOOTING (Cycle Part) E458: E458 CT over current Decision MethodThe CT value of the relevant compressor is over 20A ( more than 5 sec.) Possible CauseCT sensor badness Compressor Breakdown Action1.Check the resistance of the CT sensor connector 2.Check the value of CT sensor is zero at stop 3.Compare the value of CT sensor with another measurement device 4.Replace the relevant compressor

16 TROUBLE SHOOTING (Cycle Part) E428: E428Comp down by compression ratio control Decision Method(High pressure + 1) / (Low Pressure + 1) ≥ 8.5 (more than 10 min.) Possible CausePressure sensor badness EEV malfunction Pipe is clogged Action1.Check the service valve is open 2.Check the value of the pressure sensor (S-Net or View mode) is proper using manifold gage 3.Check the operation of EEV (Outdoor units / indoor units) 4.Check pipe status 5. In case of partial outdoor units are operated, Check leakage from liquid tube valve or discharge check valve of no-operating outdoor units 6.Confirm refrigerant quantity

17 TROUBLE SHOOTING (Cycle Part) E153: E153 ↔ A***Indoor Unit Floating S/W error (2 nd check) P701Indoor Unit Floating S/W error (1 st check) Decision Method Possible CauseDrain pump Breakdown Floating S/W malfunction Action1.After separating Floating S/W connector, check the resistance of both ends of the Floating S/W is infinity. (OPEN when there is no water) 2.Check the supplied voltage to the Drain pump is proper. Replace PCB of Indoor Unit. 3.Check the operation of Drain pump Replace Drain pump of Indoor Unit. ※ After Service, Indoor unit should be reset by power supply

18 TROUBLE SHOOTING (Cycle Part) E152: E152 ↔ A*** Indoor Unit EEV Closing error (2 nd check) P702 Indoor Unit EEV Closing error (1 st check) Decision MethodIn Cooling mode, it must satisfy below conditions simultaneously (more than 20min.) 1. Tcond,out – Tair,out > 3 ℃ 2. Tair,in – Teva,in > 4 ℃ 3. Tair,in – Teva,out > 4 ℃ 4. Compressor is operating normally & relevant indoor Unit is ON (thermo on) In Heating mode, it must satisfy below conditions simultaneously (more than 3min.) 1. average high pressure : over 18kgf/ ㎠ G 2. after 5 minutes from safety start ends 3. more than 2 indoor unit are operating in heating mode (thermo on) 4. Tair,in – Teva,in > -3 ℃ & Tair,in – Teva,out > -3 ℃ Possible CauseIndoor unit’s EEV does not open Action1.Check the EEV connector is inserted correctly in the indoor PCB 2.Check the EEV Coil is inserted correctly in the EEV body 3.Check the resistance of the coil 4.Replace EEV assembly with new one.

19 TROUBLE SHOOTING (Cycle Part) E151: E151 ↔ A***Indoor Unit EEV opening error (2 nd check) P703Indoor Unit EEV opening error (1 st check) Decision MethodNo check In Heating mode In Cooling mode, it must satisfy below condition (more than 20min.) - Either Teva,in or Teva,out of stopped indoor unit is below to zero Possible CauseIndoor unit’s EEV does not close Action1.Check the EEV connector is inserted correctly in the indoor PCB 2.Check the EEV Coil is inserted correctly in the EEV body 3.Check the resistance of the coil 4.Replace EEV assembly with new one.

20 TROUBLE SHOOTING (Cycle Part) E128: E128 ↔ A***Indoor Unit EVA in Sensor Breakaway Decision MethodIn Cooling mode, it must satisfy below conditions simultaneously 1. Tcond,out – Tair,out > 3 ℃ 2. Tair,in – Teva,in ≤ 4 ℃ * 3. Tair,in – Teva,out > 4 ℃ 4. Compressor is operating normally & relevant indoor Unit is ON (thermo on) In Heating mode, it must satisfy below conditions simultaneously 1. average high pressure : over 25kgf/ ㎠ G 2. average low pressure : below 8.2kgf/ ㎠ G 3. Tcond,out – Tair,out < -2 ℃ 4. Teva,in - Tair,in < 2 ℃ * 5. Teva,out - Tair,in ≥ 3 ℃ 6. Compressor is operating normally & relevant indoor Unit is ON (thermo on) Possible CauseIndoor unit’s Eva in sensor breakaway Action1.Check the Eva in sensor is inserted correctly in the sensor holder

21 TROUBLE SHOOTING (Cycle Part) E129: E129 ↔ A*** Indoor Unit EVA out Sensor Breakaway Decision MethodIn Cooling mode, it must satisfy below conditions simultaneously 1. Tcond,out – Tair,out > 3 ℃ 2. Tair,in – Teva,out ≤ 4 ℃ * 3. Tair,in – Teva,in > 4 ℃ 4. Compressor is operating normally & relevant indoor Unit is ON (thermo on) In Heating mode, it must satisfy below conditions simultaneously 1. average high pressure : over 25kgf/ ㎠ G 2. average low pressure : below 8.2kgf/ ㎠ G 3. Tcond,out – Tair,out < -2 ℃ 4. Teva,out - Tair,in < 3 ℃ * 5. Teva,in - Tair,in ≥ 2 ℃ 6. Compressor is operating normally & relevant indoor Unit is ON (thermo on) Possible CauseIndoor unit’s Eva out sensor breakaway Action1.Check the Eva out sensor is inserted correctly in the sensor holder

22 TROUBLE SHOOTING (Cycle Part) E265: E265Sump temperature Sensor of Digital Comp. or Fixed Comp.1 Breakaway Decision MethodTsump,ini ; Sump temperature of the compressor on the verge of operation Tsump,real ; Sump temperature of the compressor operating now | Tsump,real - Tsump,ini | < 2 ℃ (more than 60 min.) No Check after 60 min. from starting operation Possible CauseSump temperature sensor breakaway ActionCheck the attachment status of sump temperature sensor Note : Only Digital compressor or Fixed 1 compressor has the sump sensor

23 TROUBLE SHOOTING (Cycle Part) E262,E263,E264: E262 ↔ U*** Fixed Comp.1 Discharge’s Temperature Sensor Breakaway E263↔ U*** Fixed Comp.2 Discharge’s Temperature Sensor Breakaway E264↔ U*** Fixed Comp.3 Discharge’s Temperature Sensor Breakaway Decision MethodIt must satisfy below condition (more than 30min.) 1. The CT sensor value of the relevant compressor is over 5A 2. Discharge temperature < Saturation temperature calculated with high pressure Possible CauseCompressor Discharge Temperature sensor breakaway Compressor Discharge Temperature sensor badness Action1. Check the temperature sensor is inserted correctly in sensor holder Insert the sensor in the sensor holder 2. Check the resistance of the discharge temperature sensor (refer E251) Replace the sensor 3. Check the sensor position corresponds to compressor correctly Change the sensor position correctly

24 TROUBLE SHOOTING (Cycle Part) E461: E461 CT low current Decision MethodThe CT value of the relevant compressor is below 4A ( more than 10min.) Possible CauseCT sensor badness Compressor Breakdown OLP Trip Action1.Check the resistance of the CT sensor connector 2.Check the value of CT sensor is zero at stop 3.Compare the value of CT sensor with another measurement device 4.Check whether OLP trip is occurred 5.Replace the relevant compressor

25 TROUBLE SHOOTING (Cycle Part) Vacuum Mode : Tact S/W K1 K1 8 timesVacuum mode (Main)“K” “5” “M“ “BLANK“ K1 9 timesVacuum mode (Sub1)K” “5” “S“ “1“ K1 10 timesVacuum mode (Sub2)K” “5” “S“ “2“ K1 11 timesVacuum mode (Sub3)K” “5” “S“ “3“ K1 12 timesVacuum mode (All)“K” “5” “A” “BLANK” In vacuum mode, 1. System operation is prohibited. 2. System does not execute both self diagnosis and protection control. Outdoor EEVLiq. EEVValves4way Valve Fully open OpenCooling mode Action Outdoor Units with vacuum mode set Outdoor Units with normal mode set Outdoor EEVLiq. EEVValves4way Valve Fully Closed ClosedCooling mode 7-Segment display

26 TROUBLE SHOOTING (Cycle Part) Pump down Mode : Tact S/W K2 1.Close the liquid service valve of all units 2.Press Tact S/W K2 3 times 3.System start the pump down operation 4.Outdoor unit that pump down is ended stops operation 5.Close the gas service valve in order that operation stops How to pump down all units K2 3 timesPump down (All Unit)“K” “7” “BLANK“ “BLANK“ K2 3 timesPump down (Main)“K” “7” “M“ “BLANK“ K2 3 timesPump down (Sub1)“K” “7” “S“ “1“ K2 3 timesPump down (Sub2)“K” “7” “S“ “2“ K2 3 timesPump down (Sub3)“K” “7” “S“ “3“ 7-Segment display ※ Pump down operation under long pipe installation is NOT desirable. Please Use adequate refrigerant recovery device.

27 TROUBLE SHOOTING (Cycle Part) K1 3 timesPump out Main“K” “3” “M“ “BLANK“ K1 4 timesPump out Sub1K” “3” “S“ “1“ K1 5 timesPump out Sub2K” “3” “S“ “2“ K1 6 timesPump out Sub3K” “3” “S“ “3“ Pump out Mode : Tact S/W K1 7-Segment display 1.Close the liquid service valve of Sub1 unit 2.Press Tact S/W K1 4 times 3.Sub1 Unit start the pump out operation 4.Check low pressure in view mode(K4 S/W) ; Do not operate system under 1.6kgf/ ㎠ G (L.P.) 5.Close the gas service valve 6.Press K3 to reset the system How to pump out Sub1 unit (example)

28 TROUBLE SHOOTING (Cycle Part) S/WK6K7K8 On Digital comp1_main Fixed comp1_sub1 Fixed comp1_sub2 Normal Fixed comp2_main Fixed comp2_sub1 Fixed comp2_sub2 Normal Fixed comp3_main Fixed comp3_sub1 Fixed comp3_sub2 Normal Off Digital comp1_main Fixed comp1_sub1 Fixed comp1_sub2 Disbranch Fixed comp2_main Fixed comp2_sub1 Fixed comp2_sub2 Disbranch Fixed comp3_main Fixed comp3_sub1 Fixed comp3_sub2 Disbranch Disbranch breakdown compressor : DIP S/W K6, K7, K8 ※ Should be set in individual unit Sub1 Fixed comp.2 is broken How to Disbranch Compressor Sub1 unit (example) 1.Set DIP S/W K6 ON, K7 OFF of Sub1 Unit 2.Press K3 to reset the system ※ It is temporary expedient and service is needed for long term operation

29 TROUBLE SHOOTING (Cycle Part) Monitoring Program : S-NET I+


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