Poweramp POWERSTOP 4.2009 - Manual (Page 17)

15 4111-0014 — November 2006
Sept.2007
Troubleshooting
Restraint does not lower-motor runs in pressure relief,
inside and outside lights work. 1. Solenoid valve mechanically stuck ON. Remove
solenoid valve from hydraulic block. Inspect block for
contaminants. Test. Replace if necessary.
Electrical Troubleshooting Continued
Restraint does not lower-motor does not run, inside
and outside lights work. 1. Obstruction activating stored limit switch.
Remove obstruction. Make sure limit switch
operates properly and light changes on limit switch.
NOTE: If equipped with outside signal lights, holding
screwdriver in front of switch and then removing
screwdriver will result in lights changing.
2. Defective limit switch. Use voltmeter to test
stored limit switch operation.
3. Defective control relay(s). Use voltmeter to test
voltage at relays(s) coil and to test relay(s) contact
operation or swap relays one at a time from known
working restraint control box to determine faulty
relay.
4. No voltage at motor. Use voltmeter to test voltage
at motor to determine if wiring is faulty.
5. Motor faulty. Test motor with with voltmeter.
Replace if necessary.
Lights do not work or lights do not work correctly-
restraint raises and lowers. 1. Defective bulb. Replace.
2. Obstruction preventing activation or deactivation
of stored limit switch. Remove obstruction. Test
switch for proper operation.
3. Defective stored limit switch. Use volt meter to
test switch.
4. Defective control relay. Use voltmeter to test
voltage at relay coil and to test relay contact
operation.
5. Defective contact block(s) at light control selector
(or key) switch. Test with voltmeter.
IMPORTANT
Do not run motor when valves are removed from
valve block.
Do not over tighten coil on valve: 15 inch lbs max
which is just over finger tight.
Do not over tighten valve into block: 15 foot lbs
max which is enough to compress the washer and
prevent leakage.
Problem Possible Solution(s)