York DHP30NWB21SDCP30NWB21SDHP36NWB21SDCP36NWB21S Service Manual page 56

Outdoor unit
(1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel)
Main Check Points:
Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC.
If the reactor (L) is correctly connected? If the connection is loose or fell? If the reactor (L) is damaged?
Fault diagnosis process:
Measure the AC voltage between
terminal L and N on wiring board
XT(power supply)
Shut down the power and wait 20 minutes;or
use DC voltmeter to measure the voltage
on the two ends of capacitor , until
the voltage is lower than 20V
49
Turn on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor
Voltage higher than 200V?
Y
N
Voltage within
N
210VAC~250VAC?
Y
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
Connect the reactor
Laccording to Elec-
If the wiring of
N
trical Wiring Diagr-
reactor L is normal?
am correctly
Y
Replace the control
panel AP1
End
Fault with the voltage
Replace the control
testing circuit on
panel AP1
control panel AP1
Shut down the power
power on and
and repair the power
supply to restore the restart the unit
range
210VAC~250VAC
N
Re-energize and
turn on the unit
N
If the fault is
Y
eliminated?
If the fault is
Y
eliminated?