Daikin B-Series Service Manual page 214

Si12-714
Troubleshooting
Check No.12
Refer to P.223
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn off the power and turn it on
again.
Get the system started.
∗ Running current
as shown at right with relay
cable 1 or 2?
NO
Check No. 12
Check the capacitor voltage.
DC320±30V?
NO
Measure the rectifier input voltage.
Voltage within
the allowable range (Supply
voltage±15%)?
NO
YES
Current Capacitor charged when
(guideline) the indoor unit or outdoor
unit main relay turns on
Rising with increasing
frequency
Time
2 sec
YES
Turn off the power. Disconnect the
harnesses U, V and W.
Check with the inverter checker (∗).
Any LED off?
NO
Turn off the power and reconnect
the above harnesses. Then turn on
the power again and get the
system restarted.
Compressor running?
NO
YES
Troubleshooting
Replace the outdoor unit
PCB.
* Inverter checker
Part No.: 1225477
YES
Correct the power supply or
replace the SPM.
(Replace the outdoor unit
PCB.)
YES
Replace the outdoor unit
PCB.
Replace the compressor.
Replace the outdoor unit
PCB.
Check the supply voltage.
(R2848)
203