Curtis PMC 1204X/1205X/1209/1221 Manual
34
Bench Test Procedure
A. Hook up the controller as shown. Connect the voltmeter leads to the
controller’s B+ and B- terminals. Make sure the fault switch is OFF!
B. Turn on the power switch (not the keyswitch) and watch the voltmeter. Its
reading should build up slowly over several seconds to within a couple of volts
of full battery voltage. If this voltage does not come up, the controller is bad.
C. Now turn on the keyswitch. The main contactor should turn on and the
voltage at the controller’s B+ and B- terminals should now equal the full
battery voltage. Move the throttle through its range. The lamps should
remain off.
D. Select “forward” with the forward/reverse switch. The forward contactor
should turn on. Increase the throttle and watch the lamp brightness. The
lamps should go smoothly from full off to full on over the throttle range. If
a bypass contactor is connected, it should turn off quickly when the throttle
is returned to full off.
E. Repeat step D, selecting “reverse” with the forward/reverse switch.
F. If the controller has the SRO option, test it as follows:
1. Turn off the keyswitch (which will serve as the SRO interlock for
this test).
2. Select “forward” with the forward/reverse switch. The forward
contactor should remain off.
3. Turn on the keyswitch. The forward contactor should still remain
off, and the lamps should not turn on when the throttle is moved
through its range.
4. Move the forward/reverse switch back to “neutral” (center), and
then select “forward” again. This time, the forward contactor
should turn on; moving the throttle through its range should change
lamp brightness; and the bypass contactor (if one is used) should
turn on a couple of seconds after the throttle reaches full on and
should turn off quickly when the throttle is returned to full off.
G. With the controller on and operating in the forward direction, check the
controller’s fault detect feature as follows:
1. Move the throttle to full on. The lamps should be at full brightness.
TROUBLESHOOTING & BENCH TESTING
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