Nova Lock&Load

TROUBLESHOOTING
NOVA Lock & Load
TM
Owner’s Manual
11
PROBLEM PROBABLE CAUSE RESOLUTION
Lock & Load vehicle restraint
lights do not flash and the
hook does not raise.
 Power source malfunction.
 Incorrect wiring.
 Check power source, including facility
circuit breaker and 1A fuse. and
circuit breaker on power module.
 Verify wiring per Electrical Schematic,
Figure K page 14.
Lock & Load vehicle restraint
lights are flashing, but the
hook does not raise or lower to
full extent.
 Chain is loose or broken.
 Low incoming voltage.
 Drive motor defective.
 Incorrect wiring.
 Adjust or replace as required.
 Verify incoming voltage at L1 and L2
is a minimum of 110V. Do not power
off a control transformer from other
equipment unless properly sized for
load.
 Check motor. Repair or replace as
needed.
 Verify wiring per Electrical Schematic,
Figure K page 14.
Lock & Load vehicle restraint
is operational, but hook drops
causing lights to change and/
or horn to sound while trailer is
being serviced.
 Verify brake torque.
 Drive motor defective
 If brake torque is less than 500 in lb or
chain is loose or broken, adjust or
replace as required.
 Check motor. Repair or replace as
needed.
Lock & Load vehicle restraint
is operational but all lights are
out.
 Bulbs burnt out, loose or missing.
 Incorrect wiring.
 Check all bulbs and replace as re-
quired.
 Verify wiring per Electrical Schematic,
Figure K page 14.
Lock & Load vehicle restraint
horn does not sound but hook
and lights are operational.
 Horn is defective.
 Incorrect wiring.
 Power horn using 12V DC power. If
horn does not sound, replace as re-
quired.
 Verify wiring per Electrical Schematic,
Figure K page 14.
Lock & Load vehicle restraint
hook is in stored position with
an inside green light.
 Incorrect wiring.  Verify wiring of SW1 and SW2 at the
control box and outside junction box.
Lock & Load vehicle restraint
carriage does not return to a
full up position
 Carriage binding in track.
 Damaged roller track plate.
 Broken or weak springs.
 Check to see if roller track plate is
clean and rollers are clean, full of de-
bris and lubricated. Use only ap-
proved grease to lubricate rollers.
 Verify that the roller track plate is
straight and not damaged.
 Remove spring cover and replace as
required