109
Installation and Maintenance
Service Manual
●Outdoor unit:
1.Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit)
Main detection point:
● Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter;
● Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged?
Malfunction diagnosis process:
Turn on the unit
and wait 1 minute
Fault with the
voltage testing
circuit on control
panel AP1
Replace the
control panel
AP1
Shut down the
power and repair
the power supply to
restore the range
210VAC~250VAC
power on and
restart the unit
If the fault is
eliminated?
Measure the AC voltage
between
terminal L and and N on wiring
board XT(power supply)
Voltage higher than
200V?
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor
Voltage within
210VAC~250VAC?
Shut down the power and wait 20 minutes;
or use DC voltmeter to measure the
voltage on the two ends of capacitor
(test3), until the voltage is lower than 20V
Check the
connection of reactor
(Lin the Electrical Wiring
Diagram)
If the wiring of
reactor Lis normal?
Connect the
reactor Laccording
to Electrical Wiring
Diagram correctly
Re-energize
and turn on
the unit
If the fault is
eliminated?
Replace the
control
panel AP1
End
N
N
N
N Y
Y
Y
Y
Y
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