www.Blue
Giant.com
Gold Ser
ies
TM
enius
G
lue
B
T o
u c
h
C
o n t
r o l
DISC
ONN
ECT
POW
ER
BEFO
RE O
PENI
NG.
READ
AND
FULL
Y
UNDE
R-
R
#038
-244E
Do Not E
nter
Proceed
With Ca
ution
Enter On
Green
STOP
0
ESC
SEL
8 9
7
5 6
4
2 3
1
D
O
C
K
L
E
V
E
L
E
R
17. TROUBLESHOOTING
Only a trained and authorized service technician should perform repairs and adjustments.
Contact your local dealer or distributor for assistance.
PROBLEM CAUSE
PROBLEM
Deck will not raise when the
‘DECK’
touch
button
is
operated.
Motor starts and runs.
1. Incorrect motor rotation
A. Three Phase or Single Phase
- See motor data plate for motor rotation
2. Low or no hydraulic oil in reservoir.
- Check Hydraulic Fluid Level
3. Pump faulty in power pack.
- Replace Pump
4. Coupling between pump and motor broken / worn out.
- Replace coupling
5. Pressure Relief Valve out of adjustment.
- Remove cap and turn adjustment screw clockwise until deck begins to lift.
Deck will not raise when the
‘DECK’
touch
button
is
operated. Motor attempts to
run, but the power supply
circuit breaker / fuses trips /
blows and the motor stops.
Deck will not raise when the
‘DECK’
touch
button
is
operated. Motor does not
attempt to run.
No sound is heard, main power
supply is present.
Deck does not begin to rise
immediately when motor runs.
Deck rises in delayed action.
1. Air is trapped in the deck lifting cylinder.
- Bleed the system. See step 3 below.
2. Pressure Relief Valve set too low on power pack.
- Refer to Power Pack Adjustment
3. Hydraulic hose was not pre-filled with fluid prior to installation.
To bleed air from the hydraulic system:
- Operate the dock leveler and place the deck in its fully lowered, below level position.
- Maintain pressure on the ‘DOWN’ touch button for 2 minutes after the deck has reached its
lowest position and the lip has fully descended.
1. Motor Thermal overload tripped (usually caused by
holding button too long and control station overheats)
- Shut off main power from fused disconnect and turn back on.
2. Jumper removed from overhead terminal block.
3. Overhead door sensor (optional).
- Ensure that overhead door is completely open.
- Check overhead door sensor for any interference and if
faulty, repair or replace.
4. Vehicle Restraint (optional) not engaged.
5. Faulty contactor coil.
- Replace
6. Control Fuse Blown
- Locate faulty fuse. Repair then replace
1. Faulty Power Pack Motor.
2. Faulty Wiring.
3. Fuse / Circuit Breaker sized too low.
VIEW FROM
RESERVOIR
SIDE
PRESSURE
RELIEF
VALVE
U-SERIES VERTICAL STORING DOCK LEVELER WITH BLUE GENIUS™ CONTROLS
21
