11 Troubleshooting
0870157201_RA0025-0040F_A0002_IM_en
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
CAUTION
Hot surface.
Risk of burns!
• Prior to any action requiring touching the machine, let the machine cool down first.
FV
EF
Problem
The machine does not start. The motor is not supplied
The machine does not reach
the usual pressure on the
suction connection.
The machine runs very nois-
ily.
IS
GB
CPL
Possible Cause
with the correct voltage.
The motor is defective.
The coupling (CPL) is de-
fective.
Oil level too low.
The inlet screen (IS) is par-
tially clogged.
The inlet filter cartridge (op-
tional) is partially clogged.
Internal parts are worn or
damaged.
Worn coupling (CPL).
Stuck vanes.
Defective bearings.
Troubleshooting | 11
OF
Remedy
• Check the power supply.
• Replace the motor.
• Replace the coupling
(CPL).
• Top up oil.
• Clean the inlet screen (IS).
• Replace the inlet filter
cartridge.
• Repair the machine (con-
tact Busch).
• Replace the coupling
(CPL).
• Repair the machine (con-
tact Busch).
• Repair the machine (con-
tact Busch).
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