Haier MRV5-H - 8.2.5 Fan Motor Detection Standard

140
Failure code
Outdoor
digital
display tube:
125-4, 5
Indoor wired
controller:
7D
Indoor unit LED status
LED5 Failure description:
Fan motor speed un-match
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 compressor
module is damaged
◆
Check if the fan rotation is
smooth;
◆
Check whether the fan
blade load is blocked;
conditions
Hall signal logic built-in the fan
motor is wrong too many times
4. Possible causes
◆
Fan blade overload
◆
Fan motor is bad
Y
Whether the power supply voltage is
N
Adjust the power supply.
Y
Check if the electrical box connect
correctly
Reconnect or r e-fix it i n
accordance with w irin g
diagram.
N
C heck i f the inverter m odule is
normal
N
Replace the inverter module
Y
Exchange the left and the right
fan motor, if the failure fan motor
is OK
N
Replace fan motor