COMFORT-AIRE B-SVH24SA-1 Service Manual page 36

9.3.3 Zero crossing detection error diagnosis and solution (E2)
Error Code
Malfunction conditions
Possible causes
Troubleshooting:
Check if the connections and
power supply is normal?
Yes
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
●
PCB faulty
●
Correct the connections. Turn on the
No
unit when the power supply is good.
Service Manual - SVH 09/12/18/24 Series
36