Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 206

Troubleshooting by Error Code
Troubleshooting
CHECK 3
CHECK 4
193
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the
power supply
voltage between L1 and L2,
L2 and L3, and L1 and L3 within
208 V –10% to 230 V
+10%?
YES
CHECK 4 Check the inverter power transistor.
Is the power transistor failing?
NO
CHECK 3
Is the resistance greater than
the standard?
YES
Measure voltage between + and - of
the electrolytic capacitor (C+, C-)
when the compressor is operating.
Is the
measured voltage greater or equal
to 220-240 VDC?
NO
Refer to page 224.
Refer to page 225.
NO
Calibrate the power voltage.
If L2 and Phase N are disconnected,
replace the distribution box.
YES
Replace the outdoor main PCB (A1P).
NO
Replace the fan motor.
YES
Monitor voltage.
(Instantaneous voltage drop)
Replace the fan PCB (A4P, A5P).
SiUS331604E
Check the PCB condition.
In case of a serious failure,
compressor failure may lead to PCB
failure. Therefore, failure would recur
when replacing the PCB. To avoid
this situation, recheck whether the
compressor is grounded or whether
the wire is broken. Moreover, check
the compressor after replacing the
PCB.
Service Diagnosis