Daikin VRV RXYQ72-384XAYCA Service Manual page 314

Troubleshooting by Error Code
Troubleshooting
Note(s)
Reference
CHECK 4 Refer to page 362.
307
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn OFF the power supply
once, and then turn it ON
again.
Return to normal?
NO
CHECK 4
Is the power
transistor normal?
YES
CHECK 4
Is the power
transistor of the fan
driver normal?
YES
Inverter PCB (1)
A4P
YES
NO
Is the
insulation to
ground resistance of the
relevant compressor 100
k or more?
YES
NO
Fan PCB (2)
M1F: A6P
M2F: A5P
The error could have resulted from
external factors other than failures
(e.g. external noise or thunder).
NO
Replace the compressor and the
inverter PCB (1) together.
Replace the inverter PCB (1).
Replace the inverter PCB (1) and the
fan PCB (2).
Replace the inverter PCB (1).
Part 6 Service Diagnosis
SiUS342004EB