Problem Possible cause Solution
The motor does not operate. There is no power supply. Check the power supply. See
Power supply (electric pump
units)
on page 22.
Check the fuses in the electri-
cal box of the pump unit.
The remote control cable is
damaged.
Contact your local HYTORC
representative.
The motor is overheated. The voltage is too low. See
Power supply (electric
pump units)
on page 22. Con-
tact your local HYTORC repre-
sentative.
9.2.3 Pneumatic pump units
Problem
Possible cause Solution
The pump does not build pres-
sure.
The air supply is too low. When the pump operates,
make sure that the air pressure
is at least 4 bar.
Use a hose with an inner diam-
eter of at least 3/4".
Ice builds up at the exhaust. The ambient temperature is too
low.
Wait 5-10 minutes to let the ice
melt.
Use a de-icer.
The ambient air has a high hu-
midity.
Use a demoisturiser.
The pressure in the system
does not increase.
The air shut-off valve fails due
to excessive moisture and/or
dirt in the air supply.
Clean the air shut-off valve and
the air lines.
The valve in the remote control
fails.
Replace the valve in the remote
control.
Troubleshooting
37 - 001 - 37
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