Heat Controller B-DVH09SD-0 Service Manual page 35

Heat Controller
10.3.3 Zero Crossing Detection Error Diagnosis and Solution (E2)
Error Code
Malfunction
Possible Causes
Trouble shooting:
Check if the connections and
power supply is normal?
Indoor main PCB is
defective. Replace indoor
main PCB.
E2
When PCB does not receive zero crossing signal feedback for 4
minutes or the zero crossing signal time interval is abnormal.
Connection Error
●
Faulty PCB
●
Yes
Correct the connections. Turn on the
No
unit when the power supply is good.
35
DVC/DVH Inverter Mini-Split