INSTRUCTION, USE
AND MAINTENANCE MANUAL
GB
Page 43 of 168
7522-M001-14_P
GG40256.11SL - GG40256.11ST - GG40256.15
GG40256T.15 - GG40256A.15 - GG40256D.15
GG40256TD.15 - GG40256.15SL - GG60360.15
GG60360T.15 - GG60360A.15 - GG60360D.15 - GG60360TD.15
Problem
Possible cause
Remedy
When a control device is operated
the machine does not move at all.
a)
Solenoid valve not receiving
power.
b)
Solenoid valve jammed.
c)
Transformer fuse blown.
d)
Control unit not set correctly.
a)
Call the after-sales
service.
b)
Call the after-sales
service.
c)
Change the fuse.
d)
Call the after-sales
service.
No pressure in hydraulic circuit.
a)
Power unit motor turning in
wrong direction.
b)
Power unit pump has failed.
c)
No oil in power unit tank.
a)
Restore correct rotation
direction by changing
socket connection.
b)
Call the after-sales ser-
vice.
c)
Fill power unit tank
with oil
Machine operates in jerks.
a)
Not enough fluid in power unit
tank.
b)
Control unit switch has failed.
a)
Top up with oil.
b)
Call the after-sales
service.
The mandrel doesn’t rotate.
( O n l y f o r G G 4 0 2 5 6 D . 1 5 ,
GG40256TD.15, GG40256.11SL
(VARGNAV43AD), GG40256.15SL
(inverter version) (VARGNA-
V43AD), GG60360D.15 and
GG60360TD.15)
a)
The first current threshold has
been exceeded.
b)
The second current threshold
has been exceeded.
c)
Lack of supply.
d)
Insufficient net voltage.
e)
Net voltage too high.
f)
Sudden and short drop of net
voltage.
g)
The second temperature th-
reshold has been exceeded.
a)
Wait for the automatic reset
lifting the pedal.
b)
Disconnect the machine from
the net for 30 seconds at least,
then reconnect. If the problem
persists, check the harness.
c)
Connect the supply.
d)
Shorten the length of possible
extension cable to the machine
or raise the leads section (di-
sconnect and reconnect).
e)
Disconnect the machine from the
net for 30 seconds at least, then
reconnect.
f)
Disconnect the machine from the
net for 30 seconds at least, then
reconnect.
g)
The machine does not start until
the temperature does not lower
under the safety limit.
The mandrel does not reach the
maximum speed.
( O n l y f o r G G 4 0 2 5 6 D . 1 5 ,
GG40256TD.15, GG40256.11SL
(VARGNAV43AD), GG40256.15SL
(inverter version) (VARGNA-
V43AD), GG60360D.15 and
GG60360TD.15)
a)
The first temperature threshold
has been exceeded.
b)
Raised mechanical resistance.
a)
Let the motor body
cool.
b)
Make the mandrel ro-
tate loadless for some
minutes. If it does not
accelerate, call the af-
ter-sales service.
