Outdoor Fan System Check; Main Circuit Short Check - Daikin FTX20K(2)V1B Service Manual

Check

5.11 Outdoor Fan System Check

Check No.19 DC motor

5.12 Main Circuit Short Check

Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is about 0 V
Check No.20
before checking.
 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.
Positive terminal (+) of
digital multimeter
Negative terminal (–) of
digital multimeter
Resistance is OK.
Resistance is NG.
20/25/35 class
Multimeter
87
Check the outdoor fan system.
Is the
outdoor fan running?
YES
Outdoor fan system is functioning.
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
SiBE041525F
NO
Go to Check No. 16.
(R21195)
~
(2, 3)
–
(1)
0 Ω or ∞
(R20698)
Service Diagnosis
–
(1)
~
(2, 3)