Haier MRV 5-RC AS072MNERA User Manual

218
Failure code
Outdoor
digital
display tube:
122-1, 2
Indoor wired
controller: 7A
Indoor unit LED status
LED5 Failure description:
Radiator temp. sensor of compressor mo-
dule is abnormal.
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 temperature
acquisition circuit of inverter
board is normal.
◆
Check if the resistance of
temperature sensor is normal.
◆
Check if they are connected
correctly
3. Abnormity conrmation
conditions
The temperature sensor is
disconnected or the resistance
is incorrect.
4. Possible causes
◆
The resistance of
temperature sensor is found
with drift.
◆
The inverter board acquires
inaccurate temperature.
Check if the sensor and
variable frequency board is
connected correctly.
Check if the sensor
resistance is normal.
Replace the variable
frequency board.
Replace the sensor.
Adjust the connection
between temperature sensor
and variable frequency
board.
Y
Y
N
N

Haier MRV 5-RC AS072MNERA Specifications

General

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