Faults
25
Faults
WARNING
Operation of a damaged or malfunctioning compressor can lead to serious or even
fatal injuries.
In the event of a fault, disconnect the compressor from the power supply immedi-
ately.
In the event of a fault, vent the compressor manually immediately.
Use the compressor only when the fault has been rectified.
ATTENTION!
The compressor is at risk of damage if repairs are carried out by unauthorised persons.
Make sure repairs to the compressor are only carried out by the manufacturer.
Faults
If faults occur on the compressor that you are unable to rectify through lubrication and cleaning, you must
notify PREBENA Service.
Do not attempt to perform any repair work on the compressor yourself.
Make sure all faults on the compressor are rectified by PREBENA Service.
Overview of faults
The following overview lists possible faults and the necessary measures.
Fault
Possible cause
Corrective measure
A
Motor does not start
Fault in the electric power supply
Check cable, fuse,
compare motor data with the power system.
B
Motor running irregularly
Tension at the drive V-belt too low
Adjust tension on drive V-belt.
Drive V-belt worn
Replace drive V-belt.
C
Motor protecting switch turns off during
operation.
Inadequate voltage supply due to
weak power system
Switch off additional loads/consumers where possible
Extension cable too long or cross-
section too small
Use suitable cable.
Motor protecting switch has tripped
due to overheating
Interrupt current supply via the pressure switch.
Allow compressor to cool down.
If the motor protecting switch trips again on
renewed starting:
Notify aftersales service (see page 27).
D
Heavy V-belt abrasion (black deposit on
belt guard)
Tension at the drive V-belt too low
Adjust tension on drive V-belt.
E
Compressor does not reach final pres-
sure.
Lines and / or manual venting leak-
ing.
Tighten, seal and clean screw fittings.
Notify aftersales service (see page 27).
Venting screw fitting of final pres-
sure safety valve not in operating
position.
Unscrew out venting screw fitting fully.
Final pressure safety valve blows
off too early.
Replace valve.
Notify aftersales service (see page 27).
Piston rings seized or worn.
Free up or replace piston rings.
Notify aftersales service (see page 27).
Piston clearance too large.
Check piston clearance and replace parts.
Notify aftersales service (see page 27).
F
Delivery output drops.
Pipes leaking.
Tighten screw fittings.