Hyd-Mech S-20DS, Use And Maintenance Manual, Page: 132 / 138

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Use and maintenance manual S--20DS
Troubleshooting machine faults
PROBLEM PROBABLE CAUSE SOLUTION
The main switch does not work
'
Electrical supply
.
Check: phases, cables, plug,
socket.
'
Minimum voltage relay
.
Check that it is correctly sup-
plied and not burnt out.
Spindle motor will not turn
'
Electrical power supply
.
Check: the phases; the
cables; the plug; the socket.
Also check that the motor
connections are in place.
'
Motor contactor
.
Check input and output pha-
ses and check whether when
supplying A1 and A2 relay
the contactor closes.
'
Polarity change switch
.
Check input and output pha-
ses
'
Head control lever micros-
witch
.
Check that it is functioning; if
broken, replace
'
Blade tensioning
.
If the blade is not correctly
tensioned to 60 Bar, the
pressure contact does not
close and the machine is in
EMERGENCY state
'
Blade protection cover
.
Check that the closure is cor-
rect and the limit stop pres-
sed
'
Current drop
.
Check connections on the
handgrip switch, the blade
protection limiter and the
pressure gauge on the blade
tensioner group
BMT not energised (Minimum
Tension Coil)
'
Electrical power supply
.
Check: the phases; the
cables; the plug; the socket.
'
BMT Reset switch
.
Make sure that the minimum
tension coil is energised
when switch is turned from 0
to 1. If it is not, replace the
switch.
'
Emergency stop pushbutton
in
.
Make sure the emergency
stop button is released: turn
it clockwise through 1/4 of a
turn to release it.
Electropump is not working
'
Electrical supply
.
Check: phases, cables, plug,
socket and fuse no. 5 in the
electrical plant
'
No--return valve
.
Clean, if blocked replace
'
Filter
.
Clean
The pressure gauge does not
give blade tension pressure
'
Oil level
.
Top up oil level in blade ten-
sioner cylinder
'
Blocked connection
.
Check for blockages
'
Broken
.
If damaged, replace