Haier AB142FCBIA [106/126] Commercial air conditione

Haier AE142FCBKA [106/126] Commercial air conditione
Commercial Air Conditioner Model: AU242FHBIA,
AU482FIBIA, AU48NFIBJA
Evacuate and recharge
yes
Is system overfed? Is there air in system?
Is reading of discharging pipe pressure
gauge oscillatory?
cleaning
yes
no
Is filter or heat exchanger dirty?
yes
Check fan motor
or indoor EEV
if outdoor fan motor work properly during cooling
cycle? and if indoor fan motor and indoor EEV
work properly during heating cycle?
no
Repair or
replacement
yes
Open stop valve
Is piping twisted or deformed?
no
Are stop valves in suction
pipe and liquid pipe of
outdoor unit open?
yes
yes
Replace high side pressure switch
no
Is pressure value detected by
pressure gage above 3MPa?
no
Is high pressure switch activated?
Check and reconnect
yes
yes
Are connectors of CN16 pressure switch
in good condition?
7. High pressure overhigh protection: 13 flashes of outdoor alarm lamp.
When high pressure switch is activated: Pressure is above 3.0 MPa.
no
no
replace PCB
-106-

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