Troubleshooting Nd Probable Solutions; Faults, Causes And Solutions - spanesi PONYBENCH BPPLUS Manuel D'utilisation Et De Maintenance

SECTION 9

TROUBLESHOOTING ND PROBABLE SOLUTIONS

9 FAULTS, CAUSES AND SOLUTIONS

FAULT
The PONYBENCH-B lift does not
work: no reaction.
When the <ascent> is operated, the
PONYBENCH-B lift does not move up
or has diffi culty in moving up.
Insuffi cient PONYBENCH-B lift fl ow
rate.
The lift descends by itself from
stationary position until the safety
hook catches and stops on a stop
block.
The lifting arms fail to open/close.
* Only for PONYBENCH-B
POSSIBLE CAUSE
• No power (*).
• Electric motor burnt out (*).
• Pump out of order.
• Not enough oil in control unit tank.
• Pump very worn.
• Ascent solenoid-valve jammed or
out of order.
• Insuffi cient hydraulic circuit operating
pressure insuffi cient.
• Defective jack: defective sealing
gaskets.
• Safety lock valve worn.
• No compressed air.
88
SOLUTION
• Check the power distribution board
and ifnecessary set the master switch
to the correctposition.
• Check the position of the mushroom-
shapedbutton on the control console;
if necessary release it and then press
the reset button.
• Press the master switch placed
on the power board in order to turn
off power and then open the control
panel on the control unit and check
the condition of the fuses. Replace
the fuses if necessary.
• Replace the electric motor.
• Replace the pump.
• Check the tank level and top up the
oil if necessary.
• Replace the pump.
• Check the solenoid valve and
replace if necessary.
• Check the pump operating pressure
on the pressure gauge. Replace the
pump if necessary.
• Change the jack.
• Change the valve.
• Make sure that the compressed air
pipe isconnected to the compressed
air distributionsystem equipped with
a pressure reducer set tothe tight
pressure.