Service Parts Information 6 : Active Filter; Wo*A100Ldt Models) - Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document

Split system single phase type
2.4.6 Service parts information 6 : Active filter module (Only for
WO*A080LDC and WO*A100LDT models)
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.
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 defective.
36
Check the open or short-circuit
Terminal
Tester (+)
(+IN)
(-IN)
P
L1
P
L1, L2
L2
Check the diode
Terminal
Tester (+)
L2
P
Ref. value 1
Specifications for multimeter
Manufacturer : HIOKI
Model name : 3804
Power source : DC9V
→ Replace Active Filter Module.
Resistance value
Tester (-)
(-IN) 360kΩ ±20%
N
(+IN) 720kΩ ±20%
1.40MΩ
L2
(Ref. value 1)
360kΩ ±20%
N
Control Box
1.69MΩ
N
(Ref. value 1)
Resistance value
Tester (-)
1.32MΩ
P
(Ref. value 1)
1.40MΩ
L2
(Ref. value 1)
Ref. value 2
Specifications for multimeter
Manufacturer : YOKOGAWA
Model name : 7534
Power source : DC3V
Maintenance Document 1589-3
0Ω
/ 2.28MΩ
(Ref. value 2)
∞Ω
/ 1.88MΩ
(Ref. value 2)
/ 1.50MΩ
(Ref. value 2)
/ 1.51MΩ
(Ref. value 2)