Fault P5: Compressor outlet probe overtemperature
Check the heater exchanger of the outdoor
unit. Is the heat exchanger clean?
NO
Clean the heat exchangers.
YES
Is there a lack of refrigerant?
YES
Rectify the leak. Adjust the refrigerant quan-
tity.
NO
Check the current consumption and winding
resistances of the compressor and replace it if
necessary.
Fault P6: Indoor unit heat exchanger probe overtemperature
Check the heat exchanger and air filter on the
indoor unit. Are the heat exchanger and filter
clean?
YES
Clean heat exchanger and filter.
NO
Check the function of the fan motor.
Fault P7: Indoor unit heat exchanger probe anti-freeze protection
Is the room temperature below 4 °C?
YES
Increase room temperature
NO
Check the heat exchanger and air filter on the
indoor unit. Are the heat exchanger and filter
clean?
YES
Clean heat exchanger and filter.
NO
Check the function of the fan motor.
Fault P8: Outdoor unit overcurrent protection
Check all electrical connections. Are these
correctly implemented?
NO
Replace the connections.
YES
Check the compressor windings. Are they
OK?
NO
Replace the compressor.
YES
Exchange the control boards of the outdoor
unit.
REMKO BL series
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