Haier MRV5-H - Page 134

131
Failure code
Outdoor
digital
display tube:
117- 4, 5
Indoor wired
controller:
75
Indoor unit LED status
LED5 Failure description:
Fan motor module software over current
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 fan motor
strong electricity wire is
insecurely connected;
◆
Fan rotation is smooth
◆
Check if the module is
normal, if short circuit
conditions
Double fan: fan running current
value over 5.5A, single fan: fan
running current value over 6A
4. Possible causes
◆
Fan motor is poor
◆
Fan blade overload
Check if the supply voltage is normal.
Check if the electrical
cabinet is wired correctly,
the variable frequency
board and module board
is connected securely.
Motor rotation is smooth, the sound
is normal
Running current value is normal
Replace and c ompare th e
neighboring electrical cabinet
by exclusion method
accordance with the circuit diagram.
Adjust the supply voltage.
Replace the fan motor
Y
Y
Y
Y
N
N
N
N
Replace the fan motor