Outdoor Fan System Check; Main Circuit Short Check - Daikin CTXG09QVJUW Service Manual

SiUS121630EA

8.12 Outdoor Fan System Check

Check No.19 DC motor

8.13 Main Circuit Short Check

Check No.20 Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is about
0 V before checking
Positive terminal (+) of digital
multimeter
Negative terminal (–) of digital
multimeter
Resistance is OK.
Resistance is NG.
Service Diagnosis
Check the outdoor fan system.
Is the
outdoor fan running?
YES
Outdoor fan system is functioning.
Measure the resistance between the pins of the DB1 referring to the table below.
If the resistance is ∞ or less than 1 kΩ, short circuit occurs on the main circuit.
4
3
2
Multimeter
1
Fan motor
NO
lead wire connector
disconnected?
YES
Reconnect the connector.
~ +
(2, 3) (4)
+ ~
(4) (2, 3)
several kΩ ~ several MΩ
NO
Go to Check No. 16.
(R21195)
~
(2, 3)
–
~
(1)
∞
0 Ω or
Check
–
(1)
(2, 3)
(R24592)
199