Mars DVH Series - Page 36

Service Manual - DVH 09/12/18/24 SF Series
Service Manual - DVH 09/12/18/24 SF Series
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9.3.3 Zero crossing detection error diagnosis and solution (E2)
Error Code
E2
Malfunction conditions
When PCB does not receive zero crossing signal feedback for 4
minutes or the zero crossing signal time interval is abnormal.
Possible causes ● Connection error
● PCB faulty
Troubleshooting:
Check if the connections and
power supply are normal?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.