Hitachi W 6VB2, Technical And Service Manual, Page: 16 / 25

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(2) Wiring of variable speed control switch
Insert each cord into the terminal 1
↑
and
terminal 2
↑
of the speed control switch as shown
in Fig. 10, and tighten the screw [tightening
torque: 0.6 _ + 0.2 N
•
m (6 _ + 2 kgf
•
cm, 5.2 _ + 1.7
Ibs-in)]. Insert the lead wire (white) coming from
the stator into the terminal M1 and the lead wire
(yellow) into the terminal M2. Insert each lead
wire (white) coming from the noise suppressor
into the terminal C1 and C2. After insertion, pull
each lead wire slightly to check the lead wires do
not come off. To disconnect the lead wires, insert
a small flat-blade screwdriver into the slots near
the terminals and pull out the lead wires.
(Cord) (Cord)
White
Fig. 10 Wiring of speed control switch
Y
ellow
(Noise suppressor)
White White
(Noise suppressor) (Stator) (Stator)
8-5. Insulation Tests
On completion of reassembly after repair, measure the insulation resistance and conduct the dielectric strength
test.
Insulation resistance: 7 M
Ω
or more with DC 500 V Megohm Tester
Dielectric strength: AC 4,000 V/1 minute, with no abnormalities
• • • • • • • •
220 V --- 240 V (and 110 V for U.K. products)
AC 2,500 V/1 minute, with no abnormalities
• • • • • • • •
110 V --- 127 V (except for U.K. products)
8-6. No-load Current Values
After no-load operation for 30 minutes, the no-load current value should be as follows
Current (A) max.
Voltage (V) 110
2.5
115 120 220 230 240
2.5 2.5 1.2 1.2 1.1