35
6 Problems
CAUTION!
Material damage!
The hand pump cannot be repaired by the operator! In the case of a defect, the appli-
ance must be sent back to the manufacturer for repair.
â
Never open up the hand pump and / or carry out any repairs yourself.
The table below describes steps that can be taken in the event of a malfunction.
Problem
Possible cause
Remedy
Pressure cannot be
built up.
Defective / incorrect seal. Check seal
(size / material / wear)
Seal incorrectly
positioned
Check positioning
of seal.
Pressure relief
valve open
Close pressure relief
valve.
No further increase of
pres-sure is possible
Air was sucked in during
pressure generation.
Open pressure relief
valve so that the air can
be rinsed out of the piston
system.
Ensure the correct position
of the hand pump during
pressure generation.
Pressure fades (unstable) Leakage in the test item
Check connections
Check positioning of seals
Pumping stroke stiff
High counter pressure in
the test item
Increase the pressure with
the hand wheel of the fine
adjustment valve
Содержание HTP1
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