Delta OIL-FREE AIR COMPRESSOR CP503 Instruction Manual Download Page 17

17- ENG

A08200

Performing repairs may expose voltage sources, moving 

parts or compressed air sources, moving parts or 

compressed air sources. Personal injury may occur. Prior to attempting 

any repairs, unplug the air compressor and bleed off all air tank air 

pressure.

PROBLEM

CAUSE

CORRECTION

Pressure switch does 
not shut off  motor when 
compressor reaches "cut-
out" pressure. 

Pressure switch "cut-out" 
too high.  

Move On/Auto/Off lever 
to the "OFF" position,  if 
the outfit does not shut off 
contact a Trained Service 
Technician.

Contact a Trained Service 
Technician.

Excessive tank 
pressure - safety 
valve pops off.

Tube fittings are not tight 
enough.

Tighten fittings where air 
can be heard escaping. 
Check fittings with soapy 
water solution. 

Do Not 

Overtighten.

Air leaks at 
fittings.

Air leaks at 
pressure switch 
release valve  
(if equipped).

Defective pressure switch 
release valve.

Contact a Trained Service 
Technician.

Air leaks in air 
tank or at air 
tank welds.

Defective air tank.

Air tank must be replaced.  
Do not repair the leak.

Do not 

drill into, 

weld or otherwise modify 

air tank or it will weaken. 

The tank can rupture or 

explode.

Air leaks 
between head 
and valve plate. 

Leaking seal.

Contact a Trained Service 
Technician.

Possible defect in safety 
valve.

Operate safety valve manually 
by pulling on ring.  If valve still 
leaks, it should be replaced.

Air leak from 
safety valve.

Possible defect in safety 
valve.

Operate safety valve manually 
by pulling on ring.  If valve still 
leaks, it should be replaced.

Knocking Noise.

TROUBLESHOOTING

Summary of Contents for OIL-FREE AIR COMPRESSOR CP503

Page 1: ...t 2004 Delta Machinery To learn more about DELTA MACHINERY visit our website at www deltamachinery com For Parts Service Warranty or other Assistance please call 1 866 422 4286 Oil Free Air Compressor...

Page 2: ...the symbols below Please read the manual and pay attention to these symbols IMPORTANT SAFETY INSTRUCTIONS Some dust created by power sanding sawing grinding drilling and other construction activities...

Page 3: ...roperty damage To reduce the risk of fire do not allow the compressor to operate unattended Always operate the compressor in a well ventilated area free of combustible materials gasoline or solvent va...

Page 4: ...ndensed water from tank causing rust and thinning of the steel tank Modifications or attempted repairs to the tank Unauthorized modifications to the unloader valve safety valve or any other components...

Page 5: ...ect voltage and adequate fuse protection The compressed air directly from your compressor is not safe for breathing The air stream may contain carbon monoxide toxic vapors or solid particles from the...

Page 6: ...thing WARNING Risk of Falling A portable compressor can fall from a table workbench or roof causing damage to the compressor and could result in serious injury or death to the operator Always operate...

Page 7: ...parts WARNING Risk of Unsafe Operation Unsafe operation of your air compressor could lead to serious injury or death to you or others HAZARD WARNING Risk of Serious Injury or Property Damage When Tran...

Page 8: ...nderwriters Laboratories Standards for Safety Cut In Pressure While the motor is off air tank pressure drops as you continue to use your accessory When the tank pressure drops to a certain low level t...

Page 9: ...t up and down stairs or steps The unit must be lifted or pushed up a ramp 1 Submerge handle grip into warm soapy water to make installation easier Remove handle grip from soapy water and slide onto ha...

Page 10: ...4 If these grounding instructions are not completely understood or if in doubt as to whether the compressor is properly grounded have the installation checked by a qualified electrician IMPROPER GROUN...

Page 11: ...ther electrical needs lights appliances etc 3 Extension cords comply with specifications 4 Circuit is equipped with a 15 amp circuit breaker or 15 amp time delay fuse NOTE If compressor is connected t...

Page 12: ...is always less than or equal to the tank pressure Tank Pressure Gauge The tank pressure gauge indicates the reserve air pressure in the tank Regulator Controls the air pressure shown on the outlet pr...

Page 13: ...ON AUTO position The compressor will start 5 Run the compressor for 15 minutes Make sure the drain valve is open and there is minimal air pressure build up in tank 6 After 15 minutes close the drain...

Page 14: ...ety valve ring 5 Drain water from air tank by opening drain valve counter clockwise on bottom of tank Water will condense in the air tank If not drained water will corrode and weaken the air tank caus...

Page 15: ...rn clockwise 7 Replace the outlet tube and tighten the nut 8 Perform the Break in Procedure See Break in Procedure in the Operation section SERVICE AND ADJUSTMENTS Unit cycles automatically when power...

Page 16: ...cheduled maintenance as necessary 2 Set the On Auto Off lever to OFF 3 Turn the regulator counterclockwise and set the outlet pressure to zero 4 Remove the air tool or accessory 5 Pull ring on safety...

Page 17: ...re air can be heard escaping Check fittings with soapy water solution Do Not Overtighten Air leaks at fittings Air leaks at pressure switch release valve if equipped Defective pressure switch release...

Page 18: ...accessory is being used Compressor is not supplying enough air to operate accessories Prolonged excessive use of air Compressor is not large enough for air requirement Hole in hose Check valve restric...

Page 19: ...heck for proper fuse You should use a time delay fuse Check for low voltage problem Check the extension cord Disconnect the other electrical appliances from circuit or operate the compressor on its ow...

Page 20: ...ser Air compressors with 60 and 80 gallon tanks will be inspected at the site of installation Contact the nearest Authorized Warranty Service Center that provides on site service calls for service cal...

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