100
Failure code
Outdoor
digital
display tube:
28
Indoor wired
controller:
1C
Indoor unit LED status
LED5 Failure description:
High pressure sensor Pd failure
20 times
Outdoor unit LED status
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
MRV 5-HR series
DiagnosisT roubleshooting
2. Abnormity detection method
◆
Check if the sensor
connection is normal;
◆
Check if voltage
characteristic of the sensor is
normal;
◆
Check if the pressure loop
acquired by the PCB is normal.
conditions
It is detected that the AD value
is below 11 (open circuit) or
above 1012 (short circuit)
for 30 seconds continuously,
and no alarm is given during
defrosting and within 3 minutes
at the end of defrosting.
4. Possible causes
◆
The connection of pressure
sensor is not secure;
◆
The pressure sensor is
broken;
◆
The pressure acquired by
PCB is not accurate.
Replace it c orrectly by after-
sales personnel on site.
Check i f the correspondin g
connector of sensor is normal
Check if t he v oltage
characteristic of the sensor
is normal
Check if the pressure loop
acquired by t he computer
board is normal
Replace it c orrectly by after-
sales personnel on site.
Replace it c orrectly by after-
sales personnel on site.
N
N
Y
Y
Y
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