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

SiBE061121.book Page 127 Monday, April 25, 2011 3:21 PM
SiBE061121

5.11 Outdoor Fan System Check

Check No.19 DC motor

5.12 Main Circuit Short Check

Check No.20
Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.
0 V before checking.
(–) terminal of the tester
(in case of digital,
(+) terminal)
(+) terminal of the tester
(in case of digital,
(–) terminal)
Resistance is OK.
Resistance is NG.
Service Diagnosis
Check the outdoor fan system.
NO
Outdoor fan running?
YES
Outdoor fan system is functioning.
Measure the resistance between the pins of the DB1 as below.
If the resistance is ∞ or less than 1 k Ω , short circuit occurs on the main circuit.
~
+
several kΩ
~ several MΩ
0 Ω or
Fan motor
lead wire connector
disconnected?
NO
Go to Check No. 15.
+
(2, 3) (4)
~
(4) (2, 3)
∞
∞
0
Check
YES
Reconnect the connector.
(R7159)
–
~
(1)
(2, 3)
–
~
(1)
(2, 3)
several kΩ
∞
~ several MΩ
0 Ω or ∞
0
1
Tester
2
3
4
(R12035)
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