Panasonic U-8MF2E8 - Other Sensor and Switch Failures

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3WAY SYSTEM
Control Functions
1
11. Alarm Information
Alarm display
Gas temperature sensor in heat exchanger 1
Liquid temperature sensor in heat exchanger 1
EXL1
EXG1
AIR TEMP
Ambient air temperature
Suction temperature
Temp. sensor at refrigerant gas outlet of dual-tubeSCG
SCT
EXG2
Gas temperature sensor in heat exchanger 2
Liquid temperature sensor in heat exchanger 2
Oil temperature sensor 1 (Inverter compressor)OIL1
EXL2
OIL2
F07
F06
F08
F14
F12
F23
H08
F24
H27
Oil temperature sensor 2 (Constant-speed compressor 1)
When the temperature sensor fails or do not connect with PCB, “F” alarm occurs (excluding discharge temperature
sensor for compressor).
* Inverter compressor and the other constant speed compressor which magnet switch is normal do not operate.
* The constant speed compressor contains an over load relay that detects abnormal temperature.
Therefore, there is no risk of danger.
11-5. Temperature Sensor Failure
The constant-speed compressor cannot stop when the contacts of the magnet switch for compressor melt and
cannot cut out.
In this case, system compulsorily operates in cooling mode for safety.
All indoor units operate cooling mode and their fan mode is L (Low Speed).
The fan motor in the outdoor unit which magnet switch cannot cut off operates at maximum rotation speed.
11-6 Magnet Switch Failure
SM830226-003WAYECO-iSYSTEM.in4343SM830226-003WAYECO-iSYSTEM.in4343 2013/02/1311:52:292013/02/1311:52:29