Tennant 6200E, Руководство по обслуживанию

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ELECTRICAL
4-64
6200E 330415 (6--99)
MACHINE START
The main function of the start circuit is to energize
the M1 coil to close the power contacts of the M1
main contactor. Without M1 energized, only the
horn, optional lighting and accessory vacuum unit
will operate.
Electrical components used to start the
machine:
CB--1, Key switch, Stop switch, M1 main
contactor, 1242 Curtis propel motor controller,
M1a auxiliary contact for the M1 contactor,
D2 diode.
There are three individual circuits used to
energize the M1 contactor:
1. Key switch pr36 volts to the M1 coil
and pin 16 at the motor controller start circuit.
(see Fig. 1)
Current flows from battery positive (1/red circuit)
to the control circuit breaker CB--1. When the key
switch is rotated to the start position, current
continues from terminal 50 of the key switch to
the reverse polarity diode D1 and finally to pin 16
at the propel motor controller. The M1 contactor
coil also re36 volts from the key switch.
2. Propel motor controller provides --36 volts to
the M1 coil. (see Fig. 2)
When the propel motor controller re36
volts to pin 16 (key switch input), the controller
then provides --36 volts to the M1 contactor coil.
With 36 volts now across the M1 coil, both the
power M1 contact, and the M1a auxiliary contact
will close.
3. Key switch run circuit. (see Fig. 3)
Current again flows from the battery positive
(1/red) to the control circuit breaker CB1. With
the key switch spring returned to the run position,
current now travels from terminal 15 of the key
switch through the normally closed stop switch,
M1a auxiliary contact, and on through the
reverse polarity diode D1 to pin 16 at the motor
controller. The key switch, stop switch, or the
controller may open the run circuit causing the M1
coil to drop out.