Daikin VRV RXYMQ-A Series Service Manual page 254

Troubleshooting by Error Code
248
A
The insulation
resistance of the fan
motor is less
than 1 M:.
NO
CHECK 4
Is the power
transistor normal?
The
outdoor unit main
PCB has damage.
NO
Turn ON the power supply,
and then press the ON button.
The
system enters
standby mode before the
outdoor fan starts
rotating.
NO
The
system enters
standby mode before
completing the startup
operation of the
compressor.
NO
The error U2 recurs.
NO
YES
NO
YES
YES
YES
YES
SiME332106E
Replace the fan motor.
If the motor gets severely
damaged, the outdoor
unit main PCB (A1P)
should also be replaced.
Replace the outdoor unit
main PCB (A1P).
Replace the outdoor unit
main PCB (A1P).
If the outdoor unit main
PCB gets severely
damaged, the
compressor and the fan
motor may have been
damaged.
Replace the outdoor unit
main PCB (A1P).
Replace the outdoor unit
main PCB (A1P).
If the outdoor unit main
PCB gets severely
damaged, check for the
compressor.
Check for wirings.
Continue operation.
The error could have
resulted from causes such
as instantaneous power
failure.
Part 6 Service Diagnosis