BUSCH R5 RA 0155 A, Instruction Manual

Page: 22 / 28

11 | Troubleshooting
22 / 28 Instruction Manual R5 RA 0155 A_EN_en
Problem Possible Cause Remedy
The machine does not start. The motor is not supplied
with the correct voltage.
• Check the power supply.
The motor is defective. • Replace the motor.
The coupling (CPL) is defec-
tive. • Replace the coupling
(CPL).
The machine does not reach
the usual pressure on the
suction connection. Oil level too low. • Top up oil.
The inlet screen (IS) is par-
tially clogged. • Clean the inlet screen (IS).
The inlet filter cartridge (op-
tional) is partially clogged. • Replace the inlet filter car-
tridge.
Internal parts are worn or
damaged. • Repair the machine (con-
tact Busch).
The machine runs very noisi-
ly. Worn coupling (CPL). • Replace the coupling
(CPL).
Stuck vanes. • Repair the machine (con-
tact Busch).
Defective bearings. • Repair the machine (con-
tact Busch).
The machine runs too hot. Insufficient cooling. • Remove dust and dirt
from the machine.
• Check the cooling fan.
Ambient temperature too
high. • Observe the permitted
ambient temperature.
Oil level too low. • Top up oil.
The exhaust filters (EF) are
partially clogged. • Replace the exhaust filters
(EF).
The machine fumes or ex-
pels oil droplets through the
gas discharge. The exhaust filters (EF) are
partially clogged. • Replace the exhaust filters
(EF).
An exhaust filter (EF) with o-
ring is not fitted properly. • Ensure the correct posi-
tion of the exhaust filters
(EF) and the o-rings.
The float valve (FV) does
not work properly. • Check float valve and the
oil return line, repair it if
necessary (contact Busch).
Abnormal oil consumption. Oil leaks. • Replace seals (contact
Busch).
The float valve (FV) does
not work properly. • Check float valve and the
oil return line, repair it if
necessary (contact Busch).
The machine runs at atmos-
pheric pressure for a long
period. • Make sure that the ma-
chine operates under vac-
uum.
The oil is black. Oil change intervals are too
long. • Flush the machine (con-
tact Busch).
The inlet filter (optional) is
defective. • Replace the inlet filter.
The machine runs too hot. • See problem "The ma-
chine runs too hot".