DAMA-SM-21-001 Troubleshooting
Service Diagnosis 68
4.10 Outdoor Unit PCB Abnormality
Error Code E1
Method of Error
Detection
The system checks if the microcomputer is working in order.
The system checks if the zero-cross signal comes in properly.
Error Decision
Conditions
The microcomputer program runs out of control.
The zero-cross signal is not detected.
Supposed
Causes
Defective outdoor unit PCB
Noise
Momentary drop of voltage
Momentary power failure
Troubleshooting
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?
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
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