![background image](http://html.mh-extra.com/html/gardner-denver/wittig-rfw-150-dv/wittig-rfw-150-dv_operating-and-service-manual_563944027.webp)
BA-
45.01.0 • US •01/15
6-5
6. Operation
Possible cause
Elimination
Cooling water temperature exceeds 60°C
Too little cooling water in cooling
system
Cooler contaminated or cooling
water chamber on condenser has
dirt accumulation
Refill with cooling water
Clean cooler or cooling water chamber on
condenser
Mud or liquid has got into the machine
Excess suction into vehicle
At lowest permissible rotation speed,
without pressure or vacuum, rinse with
diesel-oil mixture; then add lubrication oil
as in
Power requirement too high
Rotation speed too high
Discharge pressure too high
Manometer gives incorrect
reading
Exhaust silencer blocked
Adhere to rotation speed limitations
Adhere to nominal pressure; activate or
check safety valve
Replace manometer
Replace exhaust silencer
Lack of lubrication oil although oil tank is
full
Suction filter in oil tank blocked
Clean oil tank and suction filter
Safety valve blows out air
Closed valves in pressure pipe
Blockage in pressure system
Blockage in exhaust silencer
Open valves
Remove blockage
Replace exhaust silencer
Ventilation valve is activated
Closed valves in suction pipe
Suction filter blocked
Open valves
Clean suction filter, replace cartridge if
necessary
Compressed air blows from shaft end and
oil leaks
Seals are damaged
Have radial shaft seal rings in cover plate
replaced
Smell of rubber (with belt drive)
V belts slip due to insufficient belt
tension
Discharge pressure too high
Check belt tension, tighten or replace if
necessary
Adhere to nominal pressure
Tilting of drive belts
Low belt tension
Worn V belts
Disks not aligned
Belt disks worn
Check belt tension, tighten or replace if
necessary
Fit new V belts
Align disks
Replace disks
If the problem is not solved (or not fully solved) by the above measures, please contact our after-sales service
department.
Only start the machine up again when there is no doubt that the fault has been completely
cleared!