Outdoor Unit Pcb Abnormality - Daikin 3MKS50E3V1B Service Manual

Troubleshooting for Outdoor Unit
7.6

Outdoor Unit PCB Abnormality

E1
Remote
Controller
Display
Outdoor Unit LED A
Display
Method of
Detect within the program of the microcomputer.
Malfunction
Detection
Malfunction The program of the microcomputer is in abnormal running order.
Decision
Conditions
Supposed
Causes
Troubleshooting
Power on again
Check to see that the unit is
grounded.
304
j i i i
1 2 3 4
Defective outdoor unit PCB
Noise
Momentary fall of voltage
Momentary power failure
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Error again?
NO
Grounded?
YES
h h
5
YES
NO
SiBE121135
Replace the outdoor unit PCB.
Carry out grounding work.
The cause can be external
factors other than malfunction.
Investigate the cause of noise.
(R7183)
Service Diagnosis