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2.18 P4: Discharge temperature protection (For all models)
2.18.1 Digital display output
P4
2.18.2 Description
•
Discharge temperature protection.
•
The system stops running.
•
Error code is displayed on the unit with the error.
2.18.3 Trigger / recover condition
•
Trigger condition: Discharge temperature (T5) > 115
•
Recover condition: Discharge temperature (T5) < 90
•
Reset method: Resume automatically.
2.18.4 Possible causes
•
Temperature sensor/switch not
connected properly or has malfunctioned.
•
Insufficient refrigerant.
•
System blockage.
o
C.
o
C.
•
Indoor load too large.
•
System contains air or nitrogen.
•
Poor condenser heat exchange.
•
Main PCB damaged.
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