Haier MRV 5-RC AB242MRERA User Manual

174
5. Troubleshooting
Failure code
Outdoor
digital
display tube:
20-0
Indoor wired
controller:
14
Indoor unit LED status
LED5 Failure description:
Defrosting temperature sensors:
Tdef failure
20 times
Outdoor unit LED status
Normal
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
MRV 5-RC series
Diagnosis Troubleshooting
2. Abnormity detection method
◆
Check if the sensor
connection is normal;
◆
Check if resistance
characteristic of the sensor is
normal;
◆
Check if the temperature
loop acquired by the PCB is
normal.
3. Abnormity conrmation
conditions
AD value is below 11 (open
circuit) or over 1012 (short
circuit) for 60 seconds,
sensor has no alarm when
abnormal in cooling mode.
4. Possible causes
◆
The connection of sensor is
not secure;
◆
The sensor is broken;
◆
The sensor is with
resistance drift;
◆
The temperature acquired
by PCB is not accurate.
Replace it correctly by after-
sales personnel on site.
Check if the corresponding
connector of sensor is normal
Check if resistance
characteristic of the sensor
is normal
Check if the temperature
loop acquired by the
computer board is normal
Replace it correctly by after-
sales personnel on site.
Replace it correctly by after-
sales personnel on site.
N
N
Y
Y
Y

Haier MRV 5-RC AB242MRERA Specifications

General

Brand	Haier
Model	MRV 5-RC AB242MRERA
Category	Heat Pump
Language	English