Haier AU182AFBEA - Page 298

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6) Sensor failure
check if the wiring is
correct according to
wiring diagram
if sensor is fixed
well
Relocate
reconnect
no
Is sensor short-circuit
or open-circuit?
Replace sensor
Is sensor resistance
acceptable?
Replace sensor
Is DC voltage between
both ends of sensor
near 5V or 0V?
Replace PCB
yes
yes
yes
yes
no
no
no
An external alarm is
identified according to the
list of fault codes
no
7) External alarm
Is an external alarm
connected to the system?
Is ALARM terminal in
mainboard disconnected?
yes
Short connect that
terminal
Solve problem
accordingly
yes
if failure disappear after
PCB is changed
yes
no
replace PCB
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