Gardner Denver Wittig RFW 150 DV, Руководство по эксплуатации и обслуживанию

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BA-
45.01.0 • US •01/15
6-4
6. Operation
Procedure if faults occur
Gardner Denver rotary compressors and
compressor/vacuum pumps of the RFW series are
characterized by the fact that the rotor vanes work with
practically no wear under normal operating conditions.
If however any malfunctions should occur, the
following overview gives you the possibility to find the
cause and to solve the problem.
Possible cause Elimination
Volume flow performance of
compressor/vacuum pump deteriorates

Vacuum filter contaminated

Leaking suction pipe

Leaking fittings

Rotation speed too low

Premature wear to vane; perhaps
contamination (water, dirt etc.)
has enter the machine (e.g. by
excess suction).

Clean filter, if necessary replace filter
element

Find and seal leaks

Replace fittings

Adhere to rotation range

Replace rotor vanes or have machine
overhauled in authorized repair workshop
Abnormal noise level

Machine poorly balanced

. Bearing worn out

Too little lubrication oil

Unsuitable lubrication oil

Rotor vanes knock due to lateral
wear

Housing bore has grooves or
undulations due to dirt intake

Incorrect rotation speed

Altered pressure

Altered vacuum

Balance machine exactly

Have bearing replaced

Refill with oil; clean oil reservoir and
suction filter

Fill out oil in accordance with 5.8 ,
lubrication oil table

Replace rotor vanes

Have housing re-bored and honed in
authorized repair workshop. If intake air is
strongly contaminated, fit a fine filter

Adhere to rotation speed limitations

Adhere to nominal pressure

Adhere to nominal vacuum
Compressed air temperature too high

Discharge pressure too high

Exhaust silencer blocked

Four-way tap in wrong position

. Poor cooling

Valve plate in non-return valve
jammed

Vacuum filter blocked

Vacuum too low/counter-pressure
too high

Adhere to nominal pressure

Replace exhaust silencer

Turn four-way tap to correct position

Add cooling water, clean cooler and
cooling water chamber

Clean non-return valve

Clean filter

Adhere to nominal vacuum / check
exhaust gas system, clean if necessary
Operating pressure / vacuum is not reached

Manometer or vacuum meter
gives incorrect reading

Drive belts slips

Four-way tap in wrong position

Condensate draining tap open

Replace manometer or vacuum meter

Check belt tension, tighten if necessary

Turn four-way tap to correct position

Close condensate draining tap