Presentation is loading. Please wait.

Presentation is loading. Please wait.

INVERTER-Y TRAINING 2009. TOPICS Introduction to Y-Inverter Introduction to Y-Inverter Control Algorithm Control Algorithm Troubleshooting Troubleshooting.

Similar presentations


Presentation on theme: "INVERTER-Y TRAINING 2009. TOPICS Introduction to Y-Inverter Introduction to Y-Inverter Control Algorithm Control Algorithm Troubleshooting Troubleshooting."— Presentation transcript:

1 INVERTER-Y TRAINING 2009

2 TOPICS Introduction to Y-Inverter Introduction to Y-Inverter Control Algorithm Control Algorithm Troubleshooting Troubleshooting

3 INTRODUCTION

4 What is inverter ? What are the advantages ? Differences between Conventional & Inverter A/C Basics of Inverter Technology INTRODUCTION

5 Electrical supply has fix frequency Inverter type air conditioner have frequency changer which can change the electrical frequency to control the speed of the compressor This in turn, can control the capacity accordingly What is Inverter? INTRODUCTION

6 Advantages Enhanced room temperature comfort - More precise room temperature control - Temperature fluctuation is kept within ± 0.5 C from set temperature Conventional Inverter INTRODUCTION

7 Time Compressor capacity Full capacity Conventional compressor Slow down as temperature drops Smooth ramp up from zero to high rotational speed Compressor capacity TimeMaintain room temperature at low speed Inverter Room temperature control: switching compressor ON & OFF Room temperature control: Control compressor rotational speed smoothly Advantages Less on / off cycle INTRODUCTION

8 Compressor frequency (rps) Time (min) Advantages Starting frequency INTRODUCTION Max. Target frequency hp – 68 rps 1.5 hp – 74 rps

9 Advantages Fast cooling Room temperature Time Set temperature Conventional non-inverter A/C Inverter A/C Quick cooling INTRODUCTION

10 Running current Hours of operation Conventional A/C: High starting current Frequent on/off cycle Inverter A/C: Low starting current Smooth operation Advantages Low starting current INTRODUCTION

11 Less compressor start – stop cycle Low starting current Longer compressor motor lifespan Advantages Higher reliability INTRODUCTION

12 Advantages Low energy consumption with superior efficiency Frequency of supply current is varied according to load requirements – excellent efficiency Range is between 0 – 68 rps (204 Hz) for 1.0 hp 0 – 74 rps (222 Hz) for 1.5 hp Resulting in significantly LESS compressor start/stop – low energy consumption Lowest operating frequency = 60 Hz INTRODUCTION

13 Advantages Protection Additional software protection against Over current Over heating INTRODUCTION

14 DescriptionInverter A/CConventional A/C Outlook featureAlmost same Controller Variable frequency control Relay sequence control CompressorInverter 3-Phase1 or 3-Phase Frequency0 ~ 204/222 Hz50 or 60Hz Differences Overview INTRODUCTION

15 Basics of Inverter Technology Inverter-driven Compressor Electronic Expansion Valve (EXV) IPM (Inverter Power Module) INTRODUCTION

16 Adjust capacity according to actual load by Controlling the EXV opening Controlling the refrigerant flow Power supply Rectifier circuit IPM Compressor Motor Basics of Inverter Technology INTRODUCTION

17 Inverter system block diagram Energy Source Rectifying Circuit Inverter Circuit Compressor Control & Protection Circuitry Feedback Basics of Inverter Technology INTRODUCTION

18 M IN OUT Rectifier Inverter U W V Inverter drive power circuit Basics of Inverter Technology INTRODUCTION

19 Basics of Inverter Technology What are Rectifier / Inverter? Rectifier: Inverter: Rectifying with smoothing Changing AC DC Inverse transformation with P.W.M. Changing DC AC INTRODUCTION

20 Inverter drive power circuit - components Basics of Inverter Technology M IN OUT U W V Diode Reactor Electrolytic capacitor IPM(Inverter Module) INTRODUCTION

21 The system u compressor motor input Inverter AC/DC Rectifier t t Power supply Input frequency 50Hz t1t1 222 Hz 60 Hz Inverter Output Frequency 222 Hz 60 Hz DC/AC Inverter IPM Basics of Inverter Technology INTRODUCTION

22 Indoor PCB Basics of Inverter Technology INTRODUCTION

23 Outdoor PCB Basics of Inverter Technology INTRODUCTION

24 CONTROL ALGORITHM

25 The compressor is frequency-controlled during normal operation. The target frequency is set based on following parameters: i) Outdoor ambient temperature ii) Set temperature iii) Room temperature When the frequency increases, the rotation speed of compressor increases resulting in an increased refrigerant circulation, this lead to higher amount of heat transfer and vice versa when frequency decreases. Frequency Principle CONTROL ALGORITHM

26 The system has 2 operating modes. The mode selection is done in Inverter (indoor) controls. The operating modes are: – Cool – Fan Operating Modes CONTROL ALGORITHM

27 When Tr >= Ts – 1.5°C - Comp, ID Fan and OD Fan ON When Tr <= Ts - 2°C - Comp and OD Fan OFF - ID Fan remain ON Tr = Room Temperature Ts = Set Temperature CONTROL ALGORITHM Function – Cool Mode

28 At beginning of cooling operation, compressor frequency will be increased smoothly to the target frequency so that the room temperature is reduced. When set temperature is achieved, operation frequency will be reduced to stabilize the room temperature. Function – Cool Mode CONTROL ALGORITHM

29 When will Compressor Stop? When cooling load is too small, even with lowest operation frequency and the room temperature still fall below compressor cut off point, compressor will stop. CONTROL ALGORITHM Compressor Capacity Time Tr <= Ts - 2°C Comp will stop Lowest Freq

30 Function - Fan Mode Only High, Medium and Low fan speeds are allowed. When changing cool mode to fan mode, the compressor will stop and OD fan stops after 30s. Compressor will only ON if the minimum stop time is > 3 minutes and the user change back to cool mode. Fan speed will maintain same as during fan mode. CONTROL ALGORITHM

31 Master by outdoor unit. Indoor controller board will transmit signal to outdoor controller board every 0.5s. Outdoor unit will response to indoor once the valid data is received. Protection Control - Data Communication Error Between Indoor and Outdoor Indoor Outdoor Send Signal Acknowledge PROTECTION

32 If the data communication line between indoor and outdoor occurs error for 15s continuously, compressor will stop, OD fan stop after 30s. ID LED blinks error. If the communication resumes after 15s, error code is clear and compressor restarts after 3 minutes. If the communication is not resume after 15s, unit unable to restart and the error keep blinking. Protection Control - Data Communication Error Between Indoor and Outdoor PROTECTION

33 Indoor Coil Frost Prevention Only available in cooling mode. When the indoor coil temperature < 2 °C, the compressor starts to drop the frequency. This protection is activated when: - Indoor coil temperature < 0 °C for more than 180s. Compressor will stop, OD fan stop after 30s and indoor fan can only run at super low fan speed. The unit can only be restarted after 3 minutes. When the indoor coil temperature >13 °C, the compressor frequency will be reset based on the OD ambient, room and set temperature. PROTECTION

34 Input Current Control PROTECTION No.Unit CapacityI1I2I3 11.0HP9.5A6.5A5.5A 21.5HP10A7A6A

35 Input Current Control PROTECTION When the input current for running compressor exceeds I2, running frequency will be reduced by 1 step. If current still exceeds I2, frequency will be reduced by another 1 step until total current falls between I2 and I3. This protection is activated when the input current exceeds I1 for 2 seconds. Compressor will stop and it is considered total current overload. The unit can only be restarted after 3 minutes. If input current

36 Compressor Discharge Temperature Control PROTECTION

37 If compressor discharge temperature >102 °C, running frequency will be reduced by 1 step. If compressor discharge temperature still >102 °C, frequency will be reduced by another 1 step until temperature falls between 99 °C and 90 °C. This protection is activated when the compressor discharge temperature > 110 °C. The compressor will stop and considered trip. The unit can only be restarted after 3 minutes. If the compressor discharge temperature < 90 °C, the compressor frequency will be reset based on the OD ambient, set and room temperature. Compressor Discharge Temperature Control

38 PROTECTION High Pressure Protection

39 PROTECTION The compressor frequency is adjusted depend on the coil temperature. This protection is activated when the outdoor coil temperature > 64 °C, the compressor stop and OD fan stop after 30s. The unit can only be restarted after 3 minutes. High Pressure Protection

40 PROTECTION Protection on the IPM IPM error is declared when; i)Compressors motor peak current > 21A OR ii)IPM temperature >100°C OR iii)IGBT peak current > 16A. IPM error

41 TROUBLESHOOTING

42 When any error occurs, indoor LED display will keep blinking Fault display by indoor unit LED blinks here

43 Fault diagnosis by remote controller Hold down ON TIMER CLR or OFF TIMER CLR for 5 seconds TIMER CANCEL button TROUBLESHOOTING

44 Fault diagnosis by remote controller Press TIMER CANCER repeatedly until ID buzzer produces long beep The handset temperature display section will indicate the error code ID unit buzzer will produce long beep if the handset error code = unit error A short and two consecutive beeps is not the unit error Error code TROUBLESHOOTING

45 Fault diagnosis using outdoor 7-segment display TROUBLESHOOTING

46 Fault diagnosis using outdoor 7-segment display 7-segment display Flashes error code when error occurs When there is no error, compressor running frequency is displayed, unit: rps TROUBLESHOOTING

47 Fault diagnosis – stored last state error TROUBLESHOOTING Remove battery from remote controller Replace battery again into remote controller Press Mode & ON/OFF buttons together Press Mode button to 5:00 Press ON/OFF once Repeat the fault diagnosis by remote controller steps Mode button TIMER CANCEL button ON/OFF button

48 Error Codes TROUBLESHOOTING

49 Outdoor 7-segment display TROUBLESHOOTING Press on the tact switch Display parameter by flashing of 7-segment Parameter 125, display as 25, follow by 01

50 Equipments Digital clamp meter Digital multi-meter Pressure gauge AC CURRENT RESISTANT AC VOLTAGE TROUBLESHOOTING

51 Error C4 – ID coil thermistor short /open Error C4 – ID coil thermistor short / open - Remove the ID coil thermistor from PCB - Set digital multi-meter to ohm reading - Measure both terminals on the sensor using multi-meter test leads - The reading must comply with a particular temperature, refer Table 3 - If the reading differs by ±2°C. It is acceptable TROUBLESHOOTING

52 Resistance - temperature At 25 C Resistance value: 10 k TROUBLESHOOTING

53 Error C9 – Room thermistor short /open Error C9 – Room thermistor short / open Sensor RTH201 1.Possibility – low 2.Unit design with air opening at the front panel to allow sufficient space for air flow & measurement 3.10 C < operating temp. < 40 C Air intake gap for room temperature sensing TROUBLESHOOTING

54 Error H9 – OD air thermistor short /open Error H9 – OD air thermistor short / open Error J3 – Compressor discharge pipe thermistor short /open / misplaced Error J3 – Compressor discharge pipe thermistor short / open / misplaced Error J6 – OD coil thermistor short /open Error J6 – OD coil thermistor short / open TROUBLESHOOTING Share a same connector Connection to PCB

55 Error H9 – OD air thermistor short /open Error H9 – OD air thermistor short / open - Remove the OD air thermistor from PCB - Set digital multi-meter to ohm reading - Measure both terminals on the sensor using multi-meter test leads. - The reading must comply with a particular temperature, refer Table 3 - If the reading differs by ±2°C. It is acceptable TROUBLESHOOTING Thermistor

56 Error J3 – Compressor discharge pipe thermistor short /open / misplaced Error J3 – Compressor discharge pipe thermistor short / open / misplaced - Remove the compressor discharge pipe thermistor from PCB - Set digital multi-meter to ohm reading - Measure both terminals on the sensor using multi-meter test leads. - The reading must comply with a particular temperature, refer Table 3 - If the reading differs by ±2°C. It is acceptable TROUBLESHOOTING Thermistor

57 Error J6 – OD coil thermistor short /open Error J6 – OD coil thermistor short / open - Remove the OD coil thermistor from PCB - Set digital multi-meter to ohm reading - Measure both terminals on the sensor using multi-meter test leads. - The reading must comply with a particular temperature, refer Table 3 - If the reading differs by ±2°C. It is acceptable TROUBLESHOOTING Thermistor

58 Error P4 – Heat sink thermistor short /open Error P4 – Heat sink thermistor short / open - Remove the heat sink thermistor from PCB - Set digital multi-meter to ohm reading - Measure both terminals on the sensor using multi-meter test leads. - The reading must comply with a particular temperature, refer Table 3 - If the reading differs by ±2°C. It is acceptable TROUBLESHOOTING

59 Error E8 – AC input over current - Set clamp meter to AC current - Clamp terminal 1 on the OD unit terminal block - If the reading < 10 Amp. It is acceptable TROUBLESHOOTING

60 Error U2 – DC voltage out of range - Set multi-meter to DC voltage - Measure terminals 1 & 2 on the OD unit terminal block using multi-meter test leads - If the reading is within V. It is acceptable TROUBLESHOOTING positive lead (+) negative lead (-)

61 Error F6 – High pressure protection - Coil overload - Possible causes: coil dirty and air short circuit Where a wall or other obstacle is in the path of outdoor units intake or exhaust airflow Follow this installation guidelines to avoid air short circuit TROUBLESHOOTING

62 Error L5 – IPM / IGBT error - Possible causes: over current or over heat - At start up: could be due to software - After running some time: could be due to over current or over heat TROUBLESHOOTING Heat sink IPM

63 Error UO – Insufficient gas - Connect pressure gauge to OD service valve - Press and hold on the ID ON/OFF button - Set to high fan mode and temperature at 16 °C using remote controller - Under cooling mode: For 1.0 hp: at 45 rps, the pressure reading should be between 125 – 150 psi For 1.5 hp: at 65 rps, the pressure reading should be between 125 – 150 psi Check pressure reading at rated capacity Press & hold TROUBLESHOOTING

64 Error U4 – Communication error - Maximum communication wire length up to 30 meters - Make sure the recommended type of wire is used - External interference or noise - Check for loose connection TROUBLESHOOTING

65 Error UA – Installation error Y5WMY10/15J Y5SLY10/15D TROUBLESHOOTING

66 Thank You Q & A


Download ppt "INVERTER-Y TRAINING 2009. TOPICS Introduction to Y-Inverter Introduction to Y-Inverter Control Algorithm Control Algorithm Troubleshooting Troubleshooting."

Similar presentations


Ads by Google