High Pressure Sensor Error
1. Error Detection Method
It is judged an error based on the criteria listed below.
- Cooling: Status of lower 5°C saturated temperature under the detect pressure compared to the outdoor heat exchanger liquid temperature (C1 temp.) was continuosly detected for 30 minutes.
- Heating: Status of lower 5°C saturated temperature under the detect pressure compared to the highest E1 temperature in the indoor unit was continuously detected for 30 minutes.
- Open circuit or Short circuit
2. Error Diagnosis
|1-1||Sensor Sensor connector is connected to control PC board properly.||Yes||1-2|
|Reconnect and check|
|1-2||Is sensor resistance value in normal? Disconnect the connector and measure the resistance value between each wire of sensor. Correct reference values: between 1-2: 8.5 ｋ ohm, 1-3: 1.0 ｋ ohm, 2-3: 8.5ｋ ohm||Yes||2-1|
|2-1||Replace PC board because of outdoor control PC board failure.||Yes||Correct|
|2-2||Tends to have insufficient refrigerant charge in the system.||Yes||Adjust the amount of refrigerant|
|2-3||Are the tubes clogged?||Yes||Avoid clogging|
Control PC board
|3-1|| The difference between the value of actual high pressure and that of detect pressure will roughly indicate as shown below.
|No||Replace control PC board|