Daikin VRV RXYMQ-A Series Service Manual page 255

SiME332106E
RXYMQ4-6AYFK
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check for power supply
conditions.
(1) Power supply voltage falls
within the range of 380 to
415 V?
(2) Any open phase in the
power supply wiring or any
wrong wiring?
(3) Imbalance in the power
supply voltage is
maintained within 12 V?
There are some
defects in the power
supply conditions
aforementioned.
NO
The
insulation resistance
of the compressor is less
than 100 k:.
NO
The insulation
resistance of the fan motor
is less than
1 M:.
NO
CHECK 4
Is the power
transistor normal?
YES
Connect and disconnect the
connectors as shown in the
table.
The inverter
PCB has damage.
NO
A Go to the next page.
YES
YES
YES
NO
A1P A3P
X20A X4A
X28A X6A
X40A X63A
YES
Troubleshooting by Error Code
Remedy the defects.
Replace the compressor
(M1C).
Replace the fan motor
(M1F).
If the motor gets severely
damaged, the inverter
PCB (A3P) should also
be replaced.
Replace the inverter PCB
(A3P).
Replace the inverter PCB
(A3P).
If the inverter PCB gets
severely damaged, the
compressor and the fan
motor may have been
damaged.
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