Eh 02 (Zero Crossing Detection Error Diagnosis And Solution) - MrCool DIY-MULTI2-18HP230C Service Manual

8.12 EH 02 (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
• Indoor main PCB
Troubleshooting and repair:
Indoor main PCB is defective. Replace
Check the connections and
power supply.
Is it normal?
YES
indoor main PCB.
 Troubleshooting 45
Correct the connections. Turn on the
NO
unit when the power supply is good.
