SiBE12-816_D
Check
Service Diagnosis
270
8.12 Outdoor Unit Fan System Check
Check No.19
DC motor
8.13 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.
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.
★
The illustration is for 50 class model as representative.
(R7159)
YES
YES
NO
NO
Outdoor unit fan
system
functioning.
Check the outdoor unit fan system.
Go to
Check No. 15
.
Outdoor unit fan running?
Fan motor
lead wire connector
disconnected?
Reconnect the connector.
(–) terminal of the tester
(in case of digital,
(+) terminal)
~
(2, 3)
+
(4)
~
(2, 3)
–
(1)
(+) terminal of the tester
(in case of digital,
(–) terminal)
+
(4)
~
(2, 3)
–
(1)
~
(2, 3)
Resistance in OK
several k
Ω
~ several M
Ω
∞
∞
several k
Ω
~ several M
Ω
Resistance in NG
0
Ω
or
∞
0
0
0
Ω
or
∞
(R12511)
Tester
–~
~
+
1
2
3
4
–
+