Outdoor Fan System Check; Main Circuit Short Check - Daikin FFQ09Q2VJUFFQ12Q2VJUFFQ15Q2VJUFFQ18Q2VJURX09QMVJURX12QMVJURX15QMVJURX18QMVJU Service Manual

SiUS091628EA

5.11 Outdoor Fan System Check

Check No.19 DC motor

5.12 Main Circuit Short Check

Check No.20 Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approximately
0 V before checking.
Positive terminal (+) of
digital multimeter
Negative terminal (–) of
digital multimeter
Resistance is OK.
Resistance is NG.
09/12 class
Multimeter
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 k Ω , short circuit occurs on the main circuit.
4
3
2
1
Fan motor
NO
lead wire connector
disconnected?
YES
Reconnect the connector.
~ +
(2, 3) (4)
+ ~
(4) (2, 3)
several kΩ ~ several MΩ
0 Ω or
NO
Go to Check No. 16.
(R21195)
–
~
(1)
(2, 3)
–
~
(1)
(2, 3)
∞
(R20698)
Check
108