Daikin VRV III-S RXYMQ6PV4A Service Manual page 185

Troubleshooting by Indication on the Remote Controller
Troubleshooting
When the compressor is running,
measure the voltage between
+ and - of electrolytic capacitor
(C+, C-).
∗
1: Inverter's Power Transistors Check : Refering to information on page 232, 233.
∗
Check No.3
174
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the
NO
power supply voltage
230~240V ±10%?
YES
Check the inverter power
transistor. ∗1
YES
Has the power transistor
got faulty?
NO
∗
Check No.3
NO
Is the resistance
above standard
value?
YES
YES
Is the measured voltage
220 VDC or more?
NO
: Refering to information on page 202.
SiME34-608
Correct power supply
Replace the inverter PC board.
Observe the conditions of
the PC board.
In the case of a serious
failure, a compressor failure
may cause the failure of the
PC board. Even if the PC
board 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 PC board
replacement, check the
compressor.
Replace the fan motor
Monitor the voltage
(Instantaneous voltage drop)
Replace the inverter PC board
(A1P).
(S2605)
Troubleshooting