Check point 4. Check serial signal (Reverse transfer signal)
Check serial signal (Reverse transfer signal)
•
Check if indicated value swings between AC 90 V and AC 270 V at the outdoor unit terminal 1
—3.
•
If it is abnormal, check the parts below.
–
Outdoor unit fan motor in
•
If outdoor fan motor is abnormal, replace outdoor unit fan motor and main PCB.
•
If the checked parts are normal, replace the main PCB.
Check point 1-2. Check external cause such as noise
•
Check the complete insulation of the grounding.
•
Check if there is any equipment that causes harmonic wave near the power cable (Neon light
bulb or any electronic equipment which causes harmonic wave).
2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit)
BLACK
1
2
WHITE
RED
3
L1
RED
L2
WHITE
L3
BLACK
N
BLUE
"Service parts information"
End
End
AC
+
-
on page 03-49
- (03-5) -
2. Troubleshooting with error code