Troubleshooting Sheet

14
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Main inspection point:
Flow chart of Malfunction diagnosis
Y
Y
N
N
Y
N
Energize the unit
and wait for 3min
Measure voltage between
N 1and 3 of indoor
wiring block
Voltage > 200V?
Measure voltage
between L and N
of outdoor wiring
block
Normal wiring?
Voltage > 200V?
Indoor main board error
Adjust wiring
Outdoor electric
box error
indoor and outdoor
wiring error
Replace main board
of indoor unit
Replace outdoor
electric box
Replace indoor
and outdoor wiring
Remove malfunction
(2) Indoor fan does not rotate and there is no feedback
Main detection point:
Malfunction diagnosis process:
Is the control panel reliably connected with the motor? Is it loose? Is the connecting sequence correct?
Is the input voltage within the normal range (measure the voltage between L and N of the wiring block XT with AC voltage
gauge.)?
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