46
16.5.3.
Compressor Low Pressure Protection (H42)
Error code will not display (no OFF/ON Control Panel LED blinking) but store in EEPROM
Malfunction Decision Conditions:
During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29
°
C or above 26
°
C 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. 2/3 way valve 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 main PCB.
Summary of Contents for WHSD24BE51
Page 10: ...10 4 Location of Controls and Components 4 1 Indoor Unit 4 1 1 Location of Control ...
Page 11: ...11 ...
Page 12: ...12 4 1 2 Main Components 4 2 Outdoor Unit ...
Page 13: ...13 5 Dimensions 5 1 Indoor Unit ...
Page 14: ...14 5 2 Outdoor Unit ...
Page 16: ...16 7 Block Diagram ...
Page 17: ...17 8 Wiring Connection Diagram 8 1 Indoor Unit ...
Page 18: ...18 8 2 Outdoor Unit ...
Page 19: ...19 9 Electronic Circuit Diagram 9 1 Indoor Unit ...
Page 20: ...20 9 2 Outdoor Unit ...
Page 21: ...21 10 Printed Circuit Board 10 1 Indoor Unit 10 1 1 Main Printed Circuit Board ...
Page 22: ...22 10 2 Outdoor Unit 10 2 1 Main Printed Circuit Board ...
Page 23: ...23 10 2 2 Capacitor Printed Circuit Board 10 2 3 Noise Filter Printed Circuit Board ...
Page 71: ...71 17 3 To Remove Pressure Gauge 17 4 To Remove Control Panel ...
Page 72: ...72 17 5 To Remove Electronic Controller Board and Transformer 17 6 To Remove RCCB ...
Page 74: ...74 When reinstall the water pipe use grease or water at the joining ...
Page 79: ...79 18 3 Hydraulic Pump Performance ...
Page 82: ...82 19 2 WH UD24BE5 1 WH UD30BE5 1 ...
Page 83: ...83 ...