Outdoor Fan System Check; Main Circuit Short Check - Daikin FTKM-U Series Service Manual

SiMX042215E

5.10 Outdoor Fan System Check

Check No.19 DC motor

5.11 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.
 Measure the resistance between the pins of the DB1 referring to the table below.
 If the resistance is  or less than 1 k, short circuit occurs on the main circuit.
Positive terminal (+) of
digital multimeter
Negative terminal (–) of
digital multimeter
Resistance is OK.
Resistance is NG.
 12 class
Part 6 Service Diagnosis
Check the outdoor fan system.
Is the
outdoor fan running?
YES
Outdoor fan system is functioning.
1 2 3 4
– ~ ~ +
Multimeter
Fan motor
NO
lead wire connector
disconnected?
YES
Reconnect the connector.
~ (2, 3) + (4)
+ (4) ~ (2, 3)
several k ~ several M
0  or 
Check
NO
Go to Check No. 16.
(R21195)
~ (2, 3) – (1)
– (1) ~ (2, 3)
R6000751
97