114
Manual version: 1.01/ Febr. 2017
Manual rev.: 1
Závady
Troubleshooting
Problem Possible causes Repair
considerably
Worn channel for spring
5.2. Electric problems
Problem Possible causes Repair
1. Machine is not
possible to start
No voltage in the socket Line voltage must be checked
Overload relay is defective (thermal
protection)
Each FA overload relay’s
condition (on/off) must be
checked
Limit switch of either saw band
stretching, band cover or saw arm is not
closed
Check the saw band stretching
and covers
2. When the cut is
finished, the frame is
not raised
Bottom limit switch is adjusted wrongly
Bottom limit switch must be
adjusted according to chapter
ADJUSTING
A malfunction in the hydraulic
(pneumatic) system The HYTOS
(BOSCH) magnetic valve is not working
Function of magnetic valve must
be checked, valve must be
switched on, and voltage across
its terminals and coil must be
checked
3. Electric motor and
pump are without
voltage There is no
voltage between the
contactor and
thermal protection
Wrong contactor
Replace the contactor of the
engine
4. The speed indicator
of the saw band is
not functional
Sensor of speed is not adjusted
Sensor of speed must be
adjusted
Defective display The display must be replaced
Defective sensor – diode of indicator
speed does not light
Sensor must be changed and
adjusted
5. Occasional switching
off of the hydraulic
aggregate MA3
engine protection
Too big working pressure in the
hydraulic system
Service engineer must reduce
the pressure in hydraulic system
6. Hydraulic aggregate
is switched on but
the saw arm or the
Wrong connection of electrical supply
The electrical phases are connected
conversely
The phases must be switched
Only service engineer is allowed
to do this
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