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13. TROUBLESHOOTING
Trouble What to do first Possible Causes Countermeasures
The drill motor
does not start.
(1) Turn off the main switch.
(2) Turn off the PRCD (220-240V)
and unplug the drill motor from
the power supply.
Fault in the electric supply Plug the drill motor into another power
supply and check whether the drill
motor works. Check the extension cord,
RCD/GFCI/PRCD, power supply, and
the outlet. Replace them if necessary.
Other power tools are plugged into the
power supply.
Disconnect the other power tools from
the power supply. Secure at least 4.0
kVA (100 V), 3.5 kVA (110-120V) or 5.2
kVA (220-240V) for the drill motor.
The power cable/plug is damaged. Contact a Shibuya authorized dealer.
The main switch is damaged. Contact a Shibuya authorized dealer.
The armature/field coil is damaged. Contact a Shibuya authorized dealer.
The carbon brushes are worn out. Replace the carbon brushes.
(1) Turn off the main switch.
(2) Check the PRCD (220-240V).
The PRCD is turned off. Turn on the PRCD.
The motor runs,
but the core bit
does not
revolve well /
abnormal
noises.
(1) Turn off the main switch.
(2) Turn off the PRCD (220-240V)
and unplug the drill motor from
the power supply.
(3) Check that the gear change
knob is shifted properly.
(4) Check the core bit.
The gear change knob is not shifted
properly.
Shift the gear change knob to engage
gears properly.
The clutch is worn or loose. Contact a Shibuya authorized dealer.
Gears are worn or damaged. Contact a Shibuya authorized dealer.
Fragments of working materials such as
rebar, concrete, stones are jammed
between the core bit and the drilled
material.
Remove the concrete core from the
core bit.
The drill motor
shuts off during
the operation.
(1) Check whether the circuit
protector tripped.
If the circuit protector tripped, the drill
motor was overloaded due to apply too
much feed pressure.
Restart the drilling, and take care not to
apply too much feed pressure.
(2) Check whether the PRCD
tripped (220-240V).
If the PRCD tripped, electric leakage was
detected or voltage was dropped.
Contact a Shibuya authorized dealer, or
an electrical engineer.
(3) Unplug the drill motor from the
power supply.
Electric power failure Check the electric supply with electrical
engineer.
Water leaks
from the water
leakage hole /
swivel ring /
spindle shaft.
(1) Turn off the main switch.
(2) Turn off the PRCD (220-240V)
and unplug the drill motor from
the power supply. DO NOT
TOUCH THE POWER PLUG
WITH WET HANDS.
Oil seals are worn. Contact a Shibuya authorized dealer.
Water pressure is too high. Reduce the water pressure to less than
3 bar.
The core bit
can not be
attached to the
spindle.
(1) Check the core bit threads and
the spindle threads.
The core bit thread is blocked with dirt or
damaged.
Clean the thread, or replace the bit if
necessary.
The spindle thread is blocked with dirt or
damaged.
Clean the thread. If the spindle was
damaged, contact a Shibuya authorized
dealer.
Drilling
performance
goes down
(1) Turn off the main switch.
(2) Turn off the PRCD (220-240V)
and unplug the drill motor from
the power supply.
(3) Check the drainage water from
the drilling hole.
If the water contains iron powders, the
machine is cutting the rebar(s).
Restart the drilling, and take care not to
apply too much feeding pressure.
(4) Check the water supply Insufficient coolant water Increase the amount of water supply.
(5) Check the core bit.
The core bit is worn out, damaged, or
defected.
Replace with a new core bit.
The core bit segments are glazed. Contact the core bit seller to ask proper
sharpening methods.
Aggregate of concrete is too hard. Use a core bit with softer segments.
Maximum drilling depth is reached. Remove the core and use an extension
bar for core bits.
(6) Jolt the drill motor / stand / core
bit to see if it shakes.
The base is not securely fixed to the
working material.
Set up the machine again. Redo
anchoring securely / Adjust the leveling
bolts properly.
There is play between the carriage block
and the column.
Adjust the carriage block.
Screws which are fastening the base and
column, the carriage block and motor are
loosened.
Tighten the screws.
(7) Check for the axial runout of the
spindle.
Axial runout of the spindle is observed.
Contact a Shibuya authorized dealer.
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