96
Failure code
Outdoor
digital display
tube: 24-0, 1, 2
Indoor wired
controller:
18
Indoor unit LED status
LED5 Failure description:
Oil temperature sensor:
Th, Toil1 and Toil2 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 resistance
characteristic of the sensor is
normal;
◆
Check if the temperature
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
60 seconds continuously, when
given within 5 minutes.
4. Possible causes
◆
The connection of sensor is
not secure;
◆
The sensor is broken;
◆
The oil temperature sensor
is with resistance drift;
◆
The temperature acquired
by PCB is not accurate.
Replace i t correctly by after-
sales personnel on site.
Check i f the correspondin g
connector of sensor is normal
Check i f r esistanc e
characteristic of the sensor
is normal
Check i f the temperatur e
loop a cquired by t he
computer board is normal
Replace i t correctly by after-
sales personnel on site.
Replace i t correctly by after-
sales personnel on site.
N
N
Y
Y
Y
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