SiMT041311E
Troubleshooting
Service Diagnosis
142
2.15 Outdoor Unit PCB Abnormality
Error Code
E1
Method of Error
Detection
Detect within the programme of the microcomputer.
Error Decision
Conditions
The programme of the microcomputer is in abnormal running order.
Supposed
Causes
Defective outdoor unit PCB
Noise
Momentary drop of voltage
Momentary power failure
Troubleshooting
(R19727)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
ON or OFF
Blink
NO
YES
Turn on the power again.
Check if the unit is earthed.
Replace the outdoor unit
PCB.
Zero-cross signal
abnormality.
Replace the outdoor unit
PCB.
Earth the system.
Is LED A blinking?
Earthed?