Haier MRV 5-RC AS072MNERA User Manual

216
Failure code
Outdoor digital
display tube:
119-1, 2
Indoor wired
controller77
Indoor unit LED status
LED5 Failure description:
Current detecting circuit abnormal of
compressor module
20 times
Outdoor unit LED status
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
MRV 5-RC series
Diagnosis Troubleshooting
2. Abnormity detection method
◆
Check if the current sensor
is reversely connected and U
and W is in reverse direction.
◆
Check if the current sensor
is in reverse direction. (the
arrow on sensor points at the
compressor)
◆
Check if the inverter board is
well.
◆
Check if the current sensor
is well.
3. Abnormity conrmation
conditions
The current detection sensor
of inverter control board
is in abnormal conditions,
disconnected or connected
incorrectly.
4. Possible causes
◆
The inverter board and current
sensor is anti-connected or the
current sensor is in incorrect
direction.
◆
The inverter board or current
sensor is damaged.
Replace the corresponding
control boards on failure unit
with inverter control board
and module driver board
respectively and check if the
control board is in abnormal?
Replace the compressor
on the failure unit to
drive with compressor in
good performance and
check if the compressor
is abnormal?
Replace the abnormal
compressor.
Replace the abnormal
inverter control board or
module driver board.
Y
Y
Continued
N

Haier MRV 5-RC AS072MNERA Specifications

General

Brand	Haier
Model	MRV 5-RC AS072MNERA
Category	Heat Pump
Language	English