Daikin RZQ Series FCQ20EVA Service Manual page 88

Symptom-based Troubleshooting
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Turn the operation switch ON and
OFF, then wait at ON side.
unit start operation after 3
Is the discharge side
of compressor hot after the unit
Check on the cause why overcurrent
relay (for compressor) or compressor
protection thermostat acted.
[Electric system]
voltage is within ±10 % of
specified voltage.
Is the size of power
cable through total length
[Refrigerant circuit]
After vacuum drying, charge correct
amount of refrigerant. Then, start
operation again.
temperature difference
between inlet and outlet of
electronic expansion
temperature difference
between suction side and
discharge side of four
Defective compressor
79
Does the
YES
minutes?
NO
NO
stops?
YES
Power supply
NO
YES
NO
correct?
YES
Is there any
NO
valve?
YES
Is there any
NO
way valve?
YES
Not so hot
SiME281501E
Normal. Unit is in 3 minutes
standby mode.
Check the compressor.
Contact the power company.
Replace the power cable.
Replace the electronic expansion
valve.
Replace the four way valve.
Check the compressor.
Service Diagnosis