
101
MicroController Control System
Testing And Adjusting
Contactor
The lift truck can move suddenly. Injury to
personnel or damage to the lift truck is possible.
Safely lift the drive wheels off the floor. Put blocks
of wood under the frame so both drive wheels are
free to turn. Keep away from drive wheels that
turn.
Battery voltage and high amperage are present.
Injury to personnel is possible. Disconnect the
battery and discharge the head capacitor (HEAD
CAP) before any contact is made with the control
panel.
NOTICE
Damage can be caused to the control panel. Do not
switch the direction lever from one direction to
the other (plug the lift truck) when the drive wheels
are off the ground and in rotation at full speed.
1.
Disconnect the battery and discharge the head
capacitor.
WARNING
WARNING
Coil Resistance
2.
Disconnect all leads to both terminals of the coil.
3.
Set the multimeter to the 200
Ω
range.
4.
Measure the resistance of the coil at both
teminals. If must be within specifications.
See Component Measurements in Specifications
section.
5.
If the coil is not within specifications, the contactor
assembly will be replaced.
Coil Pulsing
2.
With the contactor coil leads, set the multimeter to
the 200 volts DC range.
3.
Connect the multimeter negative lead to the
negative coil terminal Y and the meter positive lead
to the coil positive terminal X wire #15 or #16.
4.
Connect the battery and activate the controls
necessary for the contactor to be activated.
5.
After the contactor activates the multimeter must
indicate 48 volts. If the voltage is not correct
and the contactor passed the Coil Resistance test,
the logics must be replaced.
Contactor Tips
2.
Visually inspect the tips to verify they are not
welded, melted, burned, or pitted.
3.
Pull and release the tips quickly to verify there is no
binding.
4.
Visually inspect the contactor assembly.
Verify foreign objects don't interfere with normal
contactor operation.
Содержание B20S-3
Страница 3: ......