Midea MCH3U-27PHH2 User Manual

48
8.4.1.3 Zero-crossing signal detection error diagnosis and solution.
Malfunction conditions
When PCB does not receive zero crossing signal feedback for
4 minutes or the zero crossing signal time interval is abnormal.
Potential causes
● Connection mistake
● Faulty PCB
Trouble shooting:
Check if the connections and
power supply is normal ?
Correct the connections . Turn on the
unit when the power supply is good .
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
PIC 4: Check point button, press 1 time for check
how many indoor units are connected.

Midea MCH3U-27PHH2 Specifications

General

Brand	Midea
Model	MCH3U-27PHH2
Category	Air Conditioner
Language	English