Poweramp POWERSTOP AUTO 11.1996 - Manual (Page 18)

Electrical Troubleshooting
16
PROBLEM POSSIBLE SOLUTION(S)
Restraint does not raise or lower - Motor
does not run, inside & outside lights do
not work. 1. No voltage at control assembly. Check voltage
input.
2. Blown fuse inside control assembly. Use voltmeter
to test.
WARNING: LINE SIDE OF FUSE IS ALWAYS HOT. LOCK
OFF POWER TO CONTROL ASSEMBLY BEFORE
REMOVING FUSE.
3. Defective contact block at power selector switch.
Use voltmeter to test.
Restraint does not raise or lower - motor
hums but does not run, inside & outside
lights work. 1. Voltage too low. Check for low voltage. Increase
wire size to correct voltage drop.
2. Defective capacitor. Disconnect capacitor. Test.
CAUTION: DISCHARGE CAPACITOR BEFORE
ATTEMPTING A CAPACITOR TEST.
Restraint does not raise - motor runs in
pressure relief, inside & outside lights
work. 1. Solenoid coil not electrically energizing. Check coil
for magnetism. Use voltmeter to test voltage at coil.
2. Solenoid spool mechanically stuck OFF. Remove
spool from hydraulic block. Inspect spool & block for
contaminants. Test. Restraint if necessary.
NOTES:
DO NOT RUN MOTOR WHEN SPOOL IS REMOVED FROM
BLOCK.
DO NOT OVERTIGHTEN COIL ON SPOOL. NUT IS TO ONLY
BE TIGHTENED TO PREVENT COIL FROM FALLING OFF
SPOOL.
DO NOT OVERTIGHTEN SPOOL INTO BLOCK. SPOOL IS
ONLY TO BE TIGHTENED TO PREVENT FLUID EXIT FROM
BLOCK VIA SPOOL WHEN UNIT OPERATING.
Restraint does not raise - motor does not
run, inside & outside lights work. 1. Defective contact block at activated pushbutton.
Use voltmeter to test.
2. No voltage at motor. Use voltmeter to test voltage
at motor.
3. Thermal protector inside motor has tripped. Wait
for protector to reset.