Daikin CTX Series Service Manual page 86

DAMA-SM-21-003
Troubleshooting
Reference
Check No.17 Refer to P.89
Reference
Check No.18 Refer to P.89
Reference
Check No.22 Refer to P.91
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Check No. 17
Check the installation condition.
NO
Stop valve fully open?
YES
Turn off the power. Then, turn on
the power to restart the system.
See if the same error occurs.
NO
Error again?
YES
Check No. 22
Check the power module.
NO
Normal?
YES
Check the power supply voltage.
NO
Voltage as rated?
YES
Short circuit of
NO
wire breakage between
compressor's coil
phases?
YES
Fully open the stop valve.
Monitor the power supply
voltage, discharge and suction
pressures, and other factors
for a long term.
Possible causes
* Momentary drop of power
supply voltage
* Compressor overload
* Short circuit
Replace the outdoor unit
PCB (main PCB).
Correct the power supply.
Check the discharge pressure.
Go to Check No. 18
Replace the compressor.
Troubleshooting
Not a malfunction.
Keep observing.
Check the connectors and
other components.
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