Haier ESA412K User Manual Page 177

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  • TROUBLESHOOTING
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Indoor troubleshooting:
no
Outdoor indicator shows 11000.
Alarm condition: outdoor system pressure is lower than 0.05MPa.
12) Outdoor low pressure abnormal
outdoor indicator shows 11000
yes
no
low pressure
abnormal
replace pressure
switch
yes
dredge piping
check if piping is blocked
yes
check if high
pressure is low,too
Lack of refrigerant, charge
additional refrigerant and check if
piping leaks, if yes, replace piping
measure actual pressure by a
pressure gauge to adjust the
output failure
Alarm condition: ambient temperature sensor is in short
circuit or open circuit for 2 seconds continously.
if sensor is fixed
well
Relocate
reconnect
no
check if the wiring is
correct according to
wiring diagram
Is sensor short-circuit
or open-circuit?
Replace sensor
Is sensor resistance
acceptable?
Replace sensor
Replace PCB
yes
yes
yes
no
no
no
1) Sensor failure
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