Outdoor Fan System Check; Main Circuit Short Check - Daikin FTKN09NMVJU Service Manual

Check

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, RKN18NMVJU
Multimeter
99
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
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
SiUS041501E
NO
Go to Check No. 16.
(R21195)
–
~
(1)
(2, 3)
–
~
(1)
(2, 3)
∞
(R20698)
Service Diagnosis