Daikin SkyAir RZR-P Series Service Manual page 170

Troubleshooting by Remote Controller
Troubleshooting
CHECK 4
Check the inverter power transistor.
When the compressor is running,
measure the voltage between
+ and - of electrolytic capacitor
(C+, C–).
CHECK 3
CHECK 4
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the power
NO
supply voltage 208~230V
±10%?
YES
Is the power YES
transistor defective?
NO
CHECK 3
NO
Is the resistance above
standard value?
YES
Is the
YES
measured voltage 220
VDC or more?
NO
Refer to P.175.
Refer to P.176.
SiUS281117
Correct power supply.
Replace the inverter PCB.
∗Observe the conditions of the
PCB.
In the case of a serious failure,
a compressor failure may
cause the failure of the PCB.
Even if the PCB is replaced, it
may cause failure again.
To avoid that, recheck the
compressor for ground and for
any broken wires.
Furthermore, even after the
completion of PCB
replacement, check the
compressor.
Replace the fan motor.
Monitor the voltage.
(Instantaneous voltage drop)
Replace the inverter PCB
(A1P).
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