Table of Contents
Advertisement
38MGRBQ: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Zero-crossing signal detection error diagnosis and solution
ERROR CODE
MALFUNCTION DECISION
CONDITIONS
SUPPOSED CAUSES
Troubleshooting
Are the connections and
power supply normal?
Indoor main PCB is
defective. Replace indoor
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
EC / PC 40
When the PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time
interval is abnormal.
Connection mistake
PCB faulty
Yes
.
main PCB.
Correct the connections. Turn on the
No
unit when the power supply is good.
37
Advertisement
Table of Contents
