60
Installation and Maintenance
Service Manual
9. Charging malfunction of capacitor
Main check points:
(1) wiring board XT (2) reactor
NOTE:The control board as below means the control board of outdoor unit.
N
Y
N
Y
N
Y
N
Y
N
Y
Put through the power
to turn on the unit and
then wait for 1min
There's malfunction
for the voltage
detection circuit of
control board.
Measure the voltage at both
ends of electrolytic capacitor
with DC voltmeter.
Replace the control
board
Is the
voltage higher than 85% of
rated voltage?
Measure the AC voltage between
terminal L and terminal N of wiring
board XT.
Turn off the power
and maintain the
power supply to
make the voltage
resume to ±10%
of rated voltage.
Is the voltage is
within ±10% of rated
voltage?
Put through the
power and turn
on the unit again
Eliminate
malfunction
Check the connection status
of reactor (L in the electric
wiring diagram).
Wait for 20min after turning off the
power or use DC voltmeter to measure
the voltage at both ends of capacity
until it's lower than 20V.
Connect the wires
of reactor L according
to the electric wiring
diagram.
Is the wire connection
of reactor L normal?
Put through the
power and turn
on the unit again.
Eliminate
malfunction
Replace the control
board
End
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