Outdoor Fan System Check; Main Circuit Short Check - Daikin FTX50GV1B Service Manual

Check

5.11 Outdoor Fan System Check

Check No.19 DC motor

5.12 Main Circuit Short Check

Check No.20 RX50/60G2V1B9, RX50/60G3V1B, RX60G4V1B only
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.
101
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.
Fan motor
NO
lead wire connector
disconnected?
YES
Reconnect the connector.
~ +
(2, 3) (4)
+ ~
(4) (2, 3)
several kΩ ~ several MΩ
4 3 2 1
Multimeter
SiBE041029EC
NO
Go to Check No. 16.
(R21195)
~
(2, 3)
–
(1)
∞
0 Ω or
(R19560)
Service Diagnosis
–
(1)
~
(2, 3)