Carrier DHMVHA Service Manual page 18

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DIAGNOSIS AND SOLUTION (CONT.)
Zero Crossing Detection Error (EL02)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
Check if the connections and
the power supply is normal.
Yes
Indoor main PCB is
defective. Replace the
indoor main PCB.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
EL02
When the PCB does not receive a zero crossing signal feedback for 4 minutes or the zero crossing signal
time interval is abnormal.
Connection mistake
PCB Faulty
No
18
Correct the connections. Turn on the
unit when the power supply is good.