Troubleshooting | 11
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11 Troubleshooting
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.
only on SV
VA
IIF
IDF
VRV
DV
DRV
standard on SD/DC
IIF2
only on SD/DC
only on DC
optional on SV
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.
• Repair the machine (con-
tact Busch).
The machine does not reach
the usual pressure.
The internal filters (IIF, IDF)
are partially clogged.
• Replace the filter cart-
ridge.
The inlet filter cartridge (op-
tional) is partially clogged.
• Replace the inlet filter
cartridge.
One of the regulating valves
(VRV, PRV) is jammed in an
open position
• Dismantle, clean, check
and reassemble the regu-
lating valve (contact
Busch).
Stuck vanes.
• Free the vanes or replace
them.
The vanes (VA) are worn
• Replace the vanes.
The felt washer of the dis-
charge valve (DV) is partially
clogged (SV version only).
• Dismantle the discharge
valve and change the felt
washer.
The machine runs very nois-
ily.
The machine runs in the
wrong direction
• Check the direction of ro-
tation.
Defective bearings.
• Repair the machine (con-
tact Busch).
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