Hitachi Utopia PAS-3HVRG, Service Manual

Page: 75 / 127

1-72
TROUBLESHOOTING
(a) Check the mounted part is broken or not by visual
check.
(b) By touching the + side of the tester to the L2 terminal
of ACT module and the - side of the tester to the P
terminal of ACT module, measure the resistance.
If all the resistances are greater than 100 k
Ω
, it is
normal.
(c) By touching the - side of the tester to the L2 terminal
of ACT module and the + side of the tester to the P
terminal of ACT module, measure the resistance.
If all the resistances are from 1 to 5 k
Ω
, it is normal.
(d) By touching the + side of the tester to the L2 terminal
of ACT module and the - side of the tester to the I
terminal of ACT module, measure the resistance.
If all the resistances are from 50 to 200 k
Ω
, it is
normal.
(3) Checking Procedures ACT Module (for 5HP only)
Outer Appearance and Internal Circuit of ACT Module
+
-
L2 P
Power Factor Control
L1 L2
(+)
(-)
P
N1
N2
I
Remove all the terminals of the ACT module before check.
If items (a) to (f) are performed and the results are satisfactory, the ACT module is normal.
Measure it under 1 k
Ω
range of a tester. Do not use a digital tester.
+
-
L2
P
+
-
L2
I