Table of Contents
Troubleshooting by Error Code
Troubleshooting
263
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check in Monitor Mode
12/14 ton classes are equipped
with 2 compressors.
Check for the compressor 1 or 2
applicable to the error code U2
while in monitor mode of the
outdoor unit PCB.
Check for power supply
conditions.
(1)Power supply voltage falls
within the standard range?
(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 not more
than 100 kΩ.
NO
The insulation
resistance of the fan
motor is not more than
1 MΩ.
NO
CHECK 4
Is the power
transistor normal?
YES
A
YES
YES
YES
NO
SiUS341615E
Remedy the defects.
Replace the compressor.
RXYQ72-120TA: M1C
RXYQ144/168TA: M1C, M2C
Replace the fan motor.
If the motor gets severely
damaged, the inverter
PCB ( 1) should also be
replaced.
1
RXYQ72-120TA: A3P
RXYQ144/168TA: A3P, A6P
Replace the inverter PCB.
( 1)
Service Diagnosis
- Quick Links:
- Outdoor Unit
Hide quick links:
Chapters
Table of Contents
Troubleshooting
