YES
YES
YES
NO
NO
NO
NO
YES
Are the characteristics of the heat
exchanger sensor (Tho-R1, R2)
OK?
Is the air circulation around the
outdoor unit done properly?
Is the high pressure protection control
activated properly?
Does the temperature (external
gauge) correspond with the
displayed temperature in the event
of an alarm?
Too much refrigerant.
Recharge correct amount of refrigerant.
Replace defective sensor.
- Is the air circulation at the outdoor
unit obstructed?
- Is the installation space sufficient?
- Is the heat exchanger clogged?
Check the operation data with
logging tool.
Defective control PCB - replace.
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