Troubleshooting for Outdoor Unit SiUS121736EA
187 Service Diagnosis
7.6 Outdoor Unit PCB Abnormality
Error Code E1
Outdoor Unit LED
Display
A j 1 i 2 i 3 i 4 h 5 h
Method of Error
Detection
Detect within the program of the microcomputer.
Error Decision
Conditions
The program of the microcomputer is in abnormal running order.
Supposed
Causes
Defective outdoor unit PCB
Noise
Momentary drop of voltage
Momentary power failure
Troubleshooting
(R21809)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
NO
NO
YES
Replace the outdoor unit PCB
(main PCB).
Ground the system.
The cause can be external
factors other than malfunction.
Investigate the cause of noise.
Turn on the power.
Error again?
Check if the outdoor unit is
grounded.
Grounded?
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