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Operating instructions 

 
 

RECTIFYING MALFUNCTIONS 

Malfunction

 

Cause

 

Remedy

 

• 

Oil level rises 

• 

Drops of water in oil 

• 

Oil has milky colour 

Water has collected in the crank 
housing. Operating temperature is 
not being reached because the 
switch-on times are too short. 

Change oil at once 
Use a smaller compressor if neces-
sary 

 

Water has collected in the crank 
housing because the machine is 
installed in a damp place. 

Change oil at once 
Select a dry place for installation  

• 

Motor cut-out has been triggered 

Ambient temperature is too high 

Ventilate the room or choose a 
cooler place for installation 

 

Supply voltage is wrong 

Ask a qualified electrician to check 
supply voltage and cross-sections of 
the supply wiring. 

 

Valves are defective 

Replace the valves 
Recommendation: call in BLITZ 
Service-Department 

• 

Low air delivery 

Suction filter clogged 

Clean / replace suction filter 

• 

Excessive oil consumption 

Wrong oil is being used 

Check the type of oil 

 

Wear between the piston-rings and 
the cylinder walls 

Replace the piston rings 
Recommendation: call in BLITZ 
Service-Department 

• 

Air is escaping through the safety 
valve on the storage tank 

Pressure switch is set too high 

Check the pressure switch settings  

• 

Air is escaping from the depres-
surisation pipe on the pressure 
switch or the solenoid valve 

Non return valve is defective 

Check the non return valve 
Recommendation: call in BLITZ 
Service-Department 

• 

Air is escaping from the depres-
surisation pipe of the pressure 
switch or the solenoid valve whilst 
compressor is running. 

Air relief valve or pressure switch 
dirty or defect 

Check air relief valve 
Recommendation Call in BLITZ 
Service Department 

• 

Automatic condensate drain 
(option) lets out water constantly 

Automatic condensate drain is 
polluted 

Clean condensate drain (this can not 
be claimed unter quaranty) 

 

MAINTENANCE – OVERALL VIEW 

 

After 100 working 
hours, max. 6-8 weeks 
after inital start 

After 500 working 
hours, at least once a 
year 

After 2000 working 
hours, at least every 2 
years 

Change Oil 

• 

 

• 

 

• 

 

Check air filter for pollution 

• 

 

• 

 

• 

 

Regulate tension of the V-belt 

• 

 

• 

 

• 

 

Clean automatic condensate drain 
(option) on air receiver 

• 

 

• 

 

• 

 

Check valve for erosion 

 

 

• 

 

 

 The given intervals are based on experience. They can differ considerably depending on the 

operating conditions. 

 Always tighten all screw connections that have been loosened during maintenance work.

 

Summary of Contents for DZNT series

Page 1: ...IL FREE PISTON COMPRESSORS TYPE DZNT GZNT GZNTS GKTE GKTZ GKTZH IDENT NR 50140 980 25 03 2003 BLITZ M SCHNEIDER WERKZEUG UND MASCHINENFABRIK GMBH H FINGER STRASSE 55 D 78199 BR UNLINGEN PHONE 07 71 92...

Page 2: ...ructions 2 1 control flange 7 belt guard 2 manometer 8 motor 3 safety valve 9 compressor block 4 pressure switch 10 air receiver 5 condensate drain 11 electric control unit 6 air outlet 12 cooler with...

Page 3: ...takes inadequate maintenance incorrect consumable material installation of the wrong replacement parts please only ever use original Blitz parts improper technical alterations to the machine failure t...

Page 4: ...sh to the ground and could cause very serious injury It is strictly forbid den to move or stand in the danger area underneath a suspended load CAUTION Improper lifting Lifting the compressor in the wr...

Page 5: ...r other regulations in force in the country of operation including those issued by the local power supply utility Always check the direction of rotation before starting the compressor up Units connect...

Page 6: ...hem The master switch must be switched off or the plug pulled out of the mains socket before any maintenance work is done Warning air pressure in the machine Even if the machine is switched off the ai...

Page 7: ...this work OIL CHANGE INTERVALS Mineral oil every 500 operating hours Synthetic oil every 1 000 operating hours Carry out an oil change at least once a year PROCEDURE Oil quantity see technical data L...

Page 8: ...lt for compressor drive is tensioned by displacing of electric motor Loosen the fixing screw of the motor by few turns Displace the motor until the v belt is tensioned Retension the fixing screw The v...

Page 9: ...t Air is escaping through the safety valve on the storage tank Pressure switch is set too high Check the pressure switch settings Air is escaping from the depres surisation pipe on the pressure switch...

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