14
Pub. No. 1190 — May 2014
RITE-HITE
®
VBR-500 DOK-LOK
®
Owner’s Manual
Problem Probable
Cause
Solution
1 DOK-LOK barrier does not raise and
Power source malfunction.
Check power source including building
lights do not flash.
circuit breaker, 1A fuse and 5A fuse on
power module.
2 DOK-LOK lights are flashing, but
Blown fuse.
Check 5A fuse on power module.
barrier does not raise/lower, to full
Replace as required.
extent.
Low incoming voltage.
Verify incoming voltage at L1 and L2 is
a minimum of 110V.
Power module failure.
Verify the appropriate LED is lit when
the LOCK button or UNLOCK button is
pressed.
No push button inputs.
Check for failed push button board
or disconnect ribbon cable.
Hydraulic power unit
Check hydraulic power unit. Repair or
replace as required.
3 DOK-LOK barrier is operational but all
Bulbs burnt out, loose or
Check all bulbs and replace as
lights are out.
missing.
required.
Damaged CPU module.
If the ISG and OSR LEDs are not
flashing while in the LOCKED position
or the ISR and OSG LEDs are not
flashing while in the UNLOCKED
position, replace the CPU module as
required.
Incorrect or damaged field
Verify wiring per Electrical Schematic.
wiring.
4 DOK-LOK horn does not sound, but
Horn failure.
Power horn using 12V DC power. If
lights and barrier are operational.
horn does not sound, replace as
required.
Damaged CPU module.
LED labeled HORN should be flashing
while in FAULT state. If not, replace
CPU module as required.
Incorrect or damaged field
Verify wiring per Electrical Schematic.
wiring.
TROUBLESHOOTING
GENERAL DIAGNOSTIC INFORMATION
