Fujitsu ASU18RLF Service Instructions Manual page 53

SERVICE PARTS INFORMATION 6
Active filter module
Check Point 1 : Check Open or Short-circuit and Diode (D1)
Remove connector, check the open or short-circuit and the diode in the module
L1
+IN
-IN
If it is abnormal,replace ACTIVE FILTER MODULE
Check Point 2 : Check the Output DC voltage (between P and N)
Check the Output DC voltage (between P and N) of compressor stopping and operating.
>> If the output voltage of compressor operating is less than the output voltage of compressor stopping,
Active Filter Module is detective. >> Replace Active Filter Module
L2
P
N
Check the open or short-circuit
Terminal
Tester(+) Tester(-)
(+IN)
( IN)
( IN)
N
(+IN)
P
L1 L2
N
P
L1,L2 Control Box
L2 N
Check the diode
Terminal
Tester(+) Tester(-)
L2 P
L2
P
Ref. value 1
Specifications for Multimeter
Manufacturer : HIOKI
Model name : 3804
Power source : DC9V.
02-32
Resistance value
+ -
360k 20%
0
+ -
720k
20%
1.40M / 2.28M
(Ref. value 1) (Ref. value 2)
+ -
360k 20%
1.69M / 1.88M
(Ref. value 1) (Ref. value 2)
Resistance value
1.32M / 1.50M
(Ref. value 1) (Ref. value 2)
1.40M / 1.51M
(Ref. value 1) (Ref. value 2)
Ref. value 2
Specifications for Multimeter
Manufacturer : YOKOGAWA
Model name : 7534
Power source : DC3V.