Charging Malfunction Of Capacitor Pu - Toyotomi KURO Mini 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.
Put through the power
to turn on the unit and
then wait for 1min
Measure the voltage at both
ends of electrolytic capacitor
with DC voltmeter.
Is the
voltage higher than 85% of
rated voltage?
N
Measure the AC voltage between
terminal L and terminal N of wiring
board XT.
Is the voltage is
within ±10% of rated
voltage?
Y
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.
Check the connection status
of reactor (L in the electric
wiring diagram).
Is the wire connection
of reactor L normal?
Y
Replace the control
board
End
Replace the control
Y
board
Turn off the power
and maintain the
power supply to
N
make the voltage
resume to ±10%
of rated voltage.
Connect the wires
of reactor L according
N
to the electric wiring
diagram.
There's malfunction
for the voltage
detection circuit of
control board.
Put through the
power and turn
on the unit again
N
Put through the
power and turn
on the unit again.
N
Eliminate
Y
malfunction
Eliminate
Y
malfunction
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