Haier MRV 5-RC VP1-112B Service Manual page 208

Failure code
Outdoor Indoor unit LED status
digital
display tube:
110-4, 5
Indoor wired
Outdoor unit LED status
controller:
6E
1. Model
MRV 5-RC series
2. Abnormity detection method
◆ Check if the motor DC +/-
loop is short circuit;
◆ Check fan blade load is
stuck, rotation is smooth;
◆ Check if the compressor
resistance is normal,
◆ Check the motor resistance
is normal;
3. Abnormity confirmation
conditions
Fan built-in drive hardware over-
current
4. Possible causes
◆ The power supply of fan
motor capacitor board is poor
◆ Fan blade load is stuck.
◆ Motor built-in driver is not
good
Normal
Failure diagnosis and troubleshooting
Diagnosis
Check if the supply voltage is normal
Check if electrical box wiring is
correct, the fan wire is securely
connected
Rotate the fan by hand, check if
rotation is smooth
Left and right fan DC + (red
line), DC- (white line) voltage is
normal DC540V
Is there any other fault 112,114?
LED5 Failure description:
Fan motor module hardware over current
20 times
LED1 LED2
Normal
N
Y
N
Y
N
Y
N
Y
N
205
Troubleshooting
R e c t i f y o n s i t e b y a f t e r - s a l e s
personnel.
R e c t i f y o n s i t e b y a f t e r - s a l e s
personnel.
Replace fan motor
C h e c k t h e c a p a c i t o r
board voltage
Detect by exclusion.