31
4111-0014 — Apr. 2020
© 2020 Systems, LLC
Symptom
Possible Cause
Solution
Restraint will not raise.
If lights are on but motor
does not run: motor
overload device tripped or
fuse blown.
Reset overload or replace fuse.
Note:
When replacing fuses or breakers, the replacement
must have the same specification as the original.
Faulty wire connections.
Check all wire connections for damage and/or
corrosion.
Faulty stored prox switch.
Check stored prox switch wiring and operation.
Note:
Stored prox switch has two lights on switch:
GREEN when metal is present, on RED when no
metal is present. Replace if lights do not work
Faulty RIG sensor.
RIG sensor failed or wired incorrectly.
Motor energizes, but
does not run.
Faulty motor.
Replace motor.
Capacitor wired incorrectly
or faulty.
Check wiring to capacitor.
Insufficient voltage.
Check wire size to control box from facility. Consult
Tech Services for correct wire size.
Motor energizes and
runs, but restraint will
not raise or lower.
Low hydraulic fluid.
Check for leaking cylinders or hoses. Fill hydraulic
fluid to correct level (see page 19).
Clogged suction filter.
Check for water contamination. Drain and remove
fluid reservoir to clean suction filter.
Faulty coil or wiring.
Check coil wiring. Coil should be energized for
restraint to raise and de-energized to lower.
Faulty spool valve.
Check valve for damage or contamination/clogged
passages.
TROUBLESHOOTING
Automatic Units
• Check all fuses inside the control panel(s). Replace
any blown fuse(s) with a fuse of equal specification.
• Make sure the correct voltages are present at the
proper locations inside the control panel(s).
Before performing the detailed troubleshooting procedures, check the following items first:
