32
4111-0014 — Apr. 2020
©
2020 Systems, LLC
TROUBLESHOOTING
Automatic Units (continued)
Symptom Possible Cause Solution
Motor energizes and
runs, but restraint will
not lower
Faulty coil, relay or wiring.
Check coil wiring and relay operation. Coil should
be de-energized to lower restraint.
Faulty spool valve.
Check valve for damage or contamination/clogged
passages.
RIG wedge.
Back up the transport vehicle and press RELEASE
again.
Restraint moves in one
direction only.
Faulty spool valve.
Check valve for damage or contamination/clogged
passages.
Faulty coil or wiring.
Check coil wiring. Coil should be energized for
restraint to raise and de-energized to lower.
Lights don’t change. 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
Lights not flashing, or
not on.
Faulty flasher relay.
Check flasher relay operation.
Note:
Flasher can fail closed (lights on steady, not
flashing) or fail open (lights will not be on).
Faulty light bulbs. Check light bulb operation.
Alarm on or caution light
on.
Faulty RIG sensor. RIG sensor failed or wired incorrectly.
Technical Service at 800-643-5424 or techservices@loadingdocksystems.com
If additional troubleshooting assistance is required, contact Systems, LLC
Technical Services with equipment serial number or customer order number (CO#).
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