international 31
Finding the causes of any troubles turned up and their remedy always demands extra attention and caution. Before starting
trouble-shooting, always pull the power supply plug.
In the following, some of the most frequent defects and their causes are listed. In case of any further defects, please call
your dealer.
Problem
Possible Cause
Remedy
Machine cannot be switched on.
No power supply. Carbon brush worn.
Check power supply. Take machine to
your service point.
Machine switches automatically off
during idle run.
No mains supply.
Check fuses. Due to the integrated low-
voltage protection, the machine does
not restart automatically. Upon return
of the voltage, the machine must be
switched on again.
Machine stops during planing.
Overload protection reacts due to blunt
knives, infeed too fast, or chip removal
too thick.
Before work is continued, replace
knives or let cool down the motor.
Response of the overload protection.
Too much chip removal Too fast feed
Blunt knives
Before continuing work, replace the
knives or wait for the motor to cool
down.
Planed surface not smooth.
Infeed too fast. Blunt knives. Irregular
feed.
Reduce infeed speed. Replace knives.
Apply constand pressure and reduce
feed.
When thicknessing, chip ejection
obstructed (without dust extractor).
Chip removal too important. Blunt
knives. Wood too humid.
Reduce chip removal. Replace knives.
When surface planing, chip ejection
obstructed (without dust extractor)
Chip removal too important. Infeed to
fast. Blunt knives. Wood too humid.
Reduce chip removal. Replace knives.
With surface planing and thicknessing,
chip ejection obstructed (with dust
extractor).
Suction performance too weak.
Use a dust extractor unit having an air-
flow rate at the suction connection of at
least 20 m/s.
Rpm drops during planing.
Chip removal too important.
Reduce chip removal.
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