Error code:
P4
Reason:
Safety shutdown of inverter controller. Internal system monitoring triggered (e.g. communi-
cation problem between board and compressor, the compressor speed is not OK)
Cause:
n
Faulty electrical connections
n
Inverter regulation on board defective
n
Condenser fan motor defective
n
Compressor defective
n
Control board defective
Check the electrical connection between the
control board and compressor. Are these cor-
rectly implemented?
YES
Establish a proper connection.
NO
Check the inverter controller. Is this functional?
NO
Replace the control board.
YES
Check the condenser fan motor. Is it OK?
NO
Follow the instructions for troubleshooting fault
F5
YES
Check the winding resistances of the com-
pressor. Are they OK?
NO
Replace the compressor
YES
Replace the control boards of the outdoor unit.
Check individual components
Check the temperature probes
Disconnect the temperature probe from the control
board and measure the resistance on the plug's
contacts.
1
Fig. 29: Check temperature probes
1: Multimeter
Error code:
dF
Reason:
The unit is in heating mode and the outdoor unit is being defrosted. After the defrost phase,
the indoor unit automatically switches back to the last operating mode
REMKO ATY
40
Summary of Contents for ATY 265
Page 41: ...Resistance values for probes T1 T2 T3 and T4 K Ohm K Ohm K Ohm K Ohm 41...
Page 42: ...Resistance values for probe T5 K Ohm K Ohm K Ohm K Ohm REMKO ATY 42...
Page 49: ...49...
Page 50: ...REMKO ATY 50...
Page 51: ......
