How To Check Simply The Main Part - York EVHC 09 DSAAAR Service Manual

Troubleshooting Guide

3 How to Check simply the main part

(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 fallen? If the reactor (L) is damaged?
Fault diagnosis process:
Switch on the unit
and wait 1 minute
Use DC voltmeter
voltage on the two
ends of electrolytic
Voltage higher than 200V?
Measure the AC voltage between
terminal L and N on wiring board
XT
210VAC~250VAC?
Switch off the power and wait 20 minutes; or
use DC voltmeter to measure the voltage on the
two ends of capacitor (test3), until the voltage
connection of reactor
reactor L is normal?
Replace the control
166
to measure the
capacitor (test3)
Fault with the voltage
Y
N
Switch off the power
and repair the supply
Voltage within
N
Y
is lower than 20V
Check the
(L in the Electrical
Wiring Diagram)
Connect the reactor L
If the wiring of
N
according to Electrical
Wiring Diagram
Y
panel AP1
End
Replace the control
testing circuit on
panel AP1
control panel AP1
Re-energize and
power to restore the
switch on the unit
voltage to
210VAC~250VAC
N
Re-energize and
switch on the unit
N
If the fault is eliminated? Y
If the fault is eliminated? Y