Service Diagnosis - Haier AS09GS1ERA Service Manual

The operation lamp flashes when any of the following errors is detected.
1. When a protection device of the indoor or outdoor unit is activated or when the thermistor
malfunctions, disabling equipment operation.
2. When a signal transmission error occurs between the indoor and outdoor units. In either case,
conduct the diagnostic procedure described in the following pages.
None of the units operates
Operation sometimes stops.
Equipment operates but does not
cool, or does not heat (only for heat
pump)
Large operating noise and vibrations
Check the power supply.
Check the indoor PCB
Check the power supply.
Check for faulty operation of the
electronic expansion valve.
Diagnosis by service port
pressure and operating current.
Check the installation condition.

Service diagnosis

Check to make sure that the rated
voltage is supplied.
Check to make sure that the indoor
PCB is broken
A power failure of 2 to 10 cycles can
stop air conditioner operation.
Set the units to cooling operation, and
compare the
temperatures of the
connection pipes of the
connection section among rooms to
check the opening and
closing operation of the electronic
expansion valves of the individual
units.
Check for insufficient gas.
Check to make sure that the required
spaces for installation (specified in
the Technical Guide,
provided.
Domestic air conditioner
liquid side
etc.) are