30 Specifications subject to change without notice. SM619PHA-03
E2 (Zero crossing detection error diagnosis and solution)
Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.
Recommended parts to prepare:
• Connection wires
• PCB
Troubleshooting and repair:
Check the connections and
power supply.
Correct the connections. Power on the
unit when the power supply is good.
NO
Indoor main PCB is defective.
Replace the indoor main PCB.
YES
Is it normal?
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