Loss Of Synchronism Detection; Outdoor Unit Display; Led1 Flashes 18 Or 19 Times; Indoor Unit Overload In Heating Mode - Haier HSU09VHG(DB)-W Service Manual

Outdoor Display

LED1 Flashes 18 or 19 Times

Turn the unit on.
Does the compressor start?
Yes
The compressor starts, but soon stops.
LED1 on the outdoor PCB starts blinking
18/19 times at a 1Hz rate
Yes
The power module is faulty,
replace the power module
Problem Remains
The compressor is faulty,
replace the compressor
Outdoor Display
LED1 Flashes 18 or 19 Times
Check the system refrigerant
charge.
Is it over or under charged?
No
Is the malfunction reported after the unit
has been operating for a period of time
No
Is the indoor air filter dirty?

Loss of Synchronism Detection

1. The compressor wiring is
No
incorrect or has bad connections
2. The compressor is damaged

Indoor Unit Overload in Heating Mode

Yes
Recharge to specifications
Yes
1. The pipe sensor is faulty
2. The indoor PCB is faulty
Yes
Clean the air filter
ERROR CODES & PROBLEM SOLVING
Spare Parts:
Compressor
Power module
Spare Parts:
Indoor pipe sensor
Indoor PCB
Refrigerant
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