GMV 3010, Инструкция по установке, эксплуатации и обслуживанию

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1 0991 497 EN - 24.03.2017
1.01
ENG
3010
¾”
V
ALVE
M
ANUAL
I
NSTALLATION
, U
SE AND
M
AINTENANCE
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4.4 FAULT ANALYSIS
Fault Possible cause Possible solution
The car d
oesn’t
keep the floor
level, pressure
loss.
DEVICES : VRP,
VMD, VSMA, PAM VRP
Remove the spool and check the cleanliness of the closure.
If the seal is damaged and/or worn, replace it. Reassemble the
spool checking that moves well into its housing.
VMD
Remove the solenoid and control the movement of the plunger
(approx 2 mm). Check the cleanliness of the closure and the
good condition of the sphere. Eventually once cleaned, remark
the closing, with the sphere itself.
Hand pump PAM
Check the closing of the check valve of the hand pump.
Car with full load
doesn't start
upward. DEVICES : VS Verify maximum pressure control safety.
Tighten the screw (1) to increase the discharge pressure of the
VS.
Delay too big on
start upward. DEVICES : VP Check the adjustment of the screw (4). Clean filters and
restrictors. Check the perfect sliding and closure cleanliness of
the spool (VP). If no improvement is obtained, replace the valve
VP.
The downward
speed is less
than the upward
speed. DEVICES :
VRF, VMD,
COMPENSATOR VRF
Check the adjustment of the screw (8).
VMD
Check the cleanliness of filters and restrictors.
SPEED COMPENSATOR
Check the perfect sliding of the spool.
If it’s necessary, tighten the screw (9) to increase downwards
speed.
The lift only runs at
high speed, both
upward and
downward. DEVICES :
VML, VRF VML
Check that the screw (3) is open. Clean filters and restrictors.
VRF
Check the perfect sliding of the spool (could be locked in the
open position).
Clean the housing and the spool.
The lift only runs at
slow speed, both
upward and
downward. DEVICES :
VML, VRF VML
Check that the solenoid valve works in manual mode (with a
screwdriver pushing the nucleus).
Check the electrical connections to the solenoid. Clean filters
and restrictors. Check the travel of the plunger (about 2 mm).
VRF
Check the perfect sliding of the spool (could be locked in the
closed position).
Clean the housing and the spool.
The car doesn't
stop correctly at
the floor level, it
goes below and it
has to relevel.
The slow speed
is too high or it
hasn't changed. DEVICES : VMD,
VRFP VMD
Check the perfect sliding of the solenoid nucleus. Clean the
housing and the spool.
VRFP
Check that the screw (5) is fully open.
Unmount and check the perfect sliding of the spool.