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Condition
Control board stuck in the
self check mode
Circuit Breaker tripped
Loose connections
Faulty micro switch
Faulty potentiometer
Faulty drive control board
Faulty motor
20
Troubleshooting Chart (cont.)
Corrective Actlon
When the main power is turned on within 3 seconds of the time
that the battery charger plug is removed the control board initiates
a self diagnostic program. To cancel the self diagnostic program
check, simply turn off the main power switch for
turn it back on.
the problem persists, turn
If
remove the 3 amp fuse for
on the main switch.
Reset
circuit breaker
all
Check
connections in propel motor drcuit especially
V and
X.
With the batteries disconnected, disconnect the wire leads to the
micro switch, at V, and test for continuity. When the control levers
are squeezed the micro switch is engaged. There should be a
slight clicking sound when the switch is engaged. Adjust or
replace
as
necessary.
With the drive motor disconnected at
to the drive motor. THe output voltage
from 0 to
volts
as
24
adjusted and the control levers are squeezed. Resistance of the
at the molex connector at R. The resistance should vary from
to
kilo ohms
as
2.2
with the control levers squeezed. If these fail, the potentiometers
will both need to be replaced.
Test voltage at P should be from 34 to
P is good but the propel motor won't respond, and all the tests
above have boen done, replace the drive control
Squeeze the control Ievem, adjust the potentiometer U, and test
or Q. When the output voltage at X or Q varies
the voltage at
X
from
0
to
24
volts but the motor does not respond, and all the tests
above have been done, replace the motor.
seconds and
3
the main switch
seconds. Replace the fuse and turn
5
or X test the
output
Q or X should vary
at
the potentiometer U on the controls
and
black leads found
the potentiometer U on the controls is adjusted
38
VDC. If the voltage at
board.
Page 20 of 20
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a t
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