Daikin REYQ-TA Series Service Manual page 243

SiUS371614E
Troubleshooting
Service Diagnosis
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 in Monitor Mode
8-14 ton classes are equipped
with 2 compressors.
Check for the compressor 1 or
2 applicable to the error code
L 1 while in monitor mode of
the outdoor unit PCB.
CHECK 4
Is the power
transistor normal?
YES
CHECK 4
Is the power
transistor of the fan
driver normal?
YES
CHECK 4 Refer to page 278.
YES
NO
Is the
insulation to
ground resistance of
the relevant compressor
100 kΩ or
more?
YES
NO
Troubleshooting by Error Code
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)
1
REYQ72TA: A3P
REYQ96-168TA: A3P, A6P
2
REYQ72TA: A4P
REYQ96-168TA: A4P, A7P
230