How To Check Simply The Main Part; Capacitor Charge Fault; Main Check Points; Fault Diagnosis Process - ComfortStar CARAT18-CD Service Manual

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:

Turn on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor (test3)
Voltage higher than 200V?
N
Measure the AC voltage between
terminal L and N on wiring board
XT(power supply)
Voltage within
210VAC~250VAC?
Y
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
(L in the Electrical
Wiring Diagram)
If the wiring of
reactor L is normal?
Y
Replace the control
panel AP1
End
Fault with the voltage
testing circuit on
Y
control panel AP1
Shut down the power
and repair the power
supply to restore the
N
range
210VAC~250VAC
Connect the reactor L
N
according to Electrical
Wiring Diagram
correctly
Replace the control
panel AP1
power on and
If the fault is eliminated?
restart the unit
N
Re-energize and
If the fault is eliminated?
turn on the unit
N
Y
Y