Outdoor Unit Pcb Abnormality - Daikin 4MXL-T Series Service Manual

Troubleshooting for Outdoor Unit
7.6

Outdoor Unit PCB Abnormality

E1
Error Code
Outdoor Unit LED A j 1 i 2 i 3 i 4 h 5 h
Display
Method of Error Detect within the program of the microcomputer.
Detection
Error Decision
The program of the microcomputer is in abnormal running order.
Conditions
Supposed
 Defective outdoor unit PCB
Causes  Noise
 Momentary drop of voltage
 Momentary power failure
Troubleshooting
204
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn on the power.
Error again?
NO
Check if the outdoor unit is
grounded.
Grounded?
YES
YES
NO
SiUS121827E
Replace the outdoor unit PCB
(main PCB).
Ground the system.
The cause can be external
factors other than malfunction.
Investigate the cause of noise.
(R21809)
Part 6 Service Diagnosis