Heat Controller A-DVC24SD-1 - Zero Crossing Detection Error Diagnosis

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Heat Controller DVC/DVH Inverter Mini-Split
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10.3.3 Zero Crossing Detection Error Diagnosis and Solution (E2)
Error Code
E2
Malfunction 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
● Faulty PCB
Trouble shooting:
Check if the connections and
power supply is 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.