The Communication Fault Between Ipm And Outdoor Pcb; Outdoor Unit Display; Led1 Flash 4 Times - Haier HSU09VHG(DB)-W Service Manual

Outdoor Display

LED1 Flash 4 Times

1) Check the plugs of MODULE COM and MODULE POWER on the
outdoor PCB and IPM modules for secure connections
2) Check the P & N wires between the outdoor PCB and IPM modules
for secure connections
Are the connections secure?
1. Measure for an approx. voltage
of 5VDC between pins 1 and 2 of
the Module Power connector
2. Measure for an approx. voltage
of 15VDC between pins 2 and 3 of
the Module Power connector
Replace the power module
PAGE 50
The Communication Fault Between IPM and Outdoor PCB
No
Yes
No
Yes
ERROR CODES & PROBLEM SOLVING
Re-seat the connections
Replace the outdoor PCB
Spare Parts:
Power module
Outdoor PCB