SiBE041029EC Troubleshooting
Service Diagnosis 70
4.11 Outdoor Unit PCB Abnormality
Error Code
E1
Method of Error
Detection
The system checks if the microprocessor is working in order.
The system checks if the zero-cross signal comes in properly.
Error Decision
Conditions
The microprocessor program runs out of control.
The zero-cross signal is not detected.
Supposed
Causes
Defective outdoor unit PCB
Broken harness between PCBs
Noise
Momentary drop of voltage
Momentary power failure
Troubleshooting RX50/60G2V1B, 71 class
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Continuously ON or OFF
Blink
YES
(R22035)
NO
Replace the outdoor unit
PCB (main PCB).
Ground the system.
Zero-cross signal
abnormality.
Replace the outdoor unit
PCB (main PCB).
Check if the outdoor unit is
grounded.
Is LED A blinking?
Grounded?
Turn on the power again.
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