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400P-RVS AUTOMATIC PORTABLE COMPRESSOR

OPERATING INSTRUCTIONS:

Please read and follow the operating instructions carefully to assure that you will enjoy the 

convenience and best use out of your air compressor.

1.  Always operate the compressor AT OR BELOW THE MAXIMUM PRESSURE RATING of the

compressor.  Refer to Specifications section of this manual.

2.  Always OBSERVE THE MAXIMUM DUTY CYCLE of the air compressor.  Refer to Specifications

section of this manual for details. Operations exceeding maximum pressure ratings and or duty

cycle will result in damage to air compressor.

3.  Your air compressor is equipped with an AUTOMATIC THERMAL OVERLOAD PROTECTOR.

This feature is designed to protect the air compressor from over-heating and causing permanent

damage to your air compressor. The thermal overload protector will automatically cut off power

to air compressor should internal operating temperature of the air compressor rise above safe

levels during excessive use.

4.  Should your compressor shut off suddenly after extended use, do not attempt to restart air

compressor.  Turn ON/OFF switch of air compressor to the OFF position. The automatic thermal

overload protector will automatically reset when internal temperature of the air compressor drops

below safe level.  After allowing air compressor to cool off for about 30 minutes, you can safely

resume use of the air compressor by turning on the air compressor.

5.  For your convenience, and to protect the air compressor from over-pressure operation that can

cause permanent damage to the unit - this compressor is equipped with built-in pressure switch

with a factory set cut-on pressure of 130 PSI (± 5%) and a factory set cut-off pressure of

155 PSI (± 5%). During inflation of tire pressures between 130 PSI to 155 PSI, if you stop inflation,

the compressor may not restart. This is completely normal, since inline pressure is greater than

cut-on pressure of the pressure switch and less than cut-off pressure of the pressure switch.

To restart compressor, deflate tire pressure to below 130 PSI, reconnect tire chuck to tire valve

stem and resume tire inflation.

6.  Please note that you may experience a slight delay of the compressor’s motor starting when the

ON/OFF switch is turned on while compressor is pressurized (when there is pressure in the line

that the compressor is connected to).  This is a normal delayed reaction, not a Compressor

ON/OFF switch malfunction.

7.  It is strongly recommended that you keep the vehicle’s engine running while using the air

compressor to prevent discharge of your vehicle’s battery.

8.  ONLY OPERATE THE AIR COMPRESSOR IN WELL VENTILATED AREAS.

Compressor performance is enhanced when operating compressor with vehicle engine running.

IMPORTANT:

 Engine must be running while using this compressor.  

Before attaching air compressor power clamps to your vehicle’s battery terminals, check to make 

sure that the ON/OFF switch of your compressor is in the OFF position. Attach the Positive (+) 

battery clamp (Red) to the Positive terminal of the battery and the Negative (-) battery clamp (Black) 

to the Negative terminal of the battery.  Always keep your vehicle’s engine running while operating 

compressor to avoid draining your vehicle’s battery.

CAUTION:

 Your Portable Air Compressor is Moisture and Dust Resistant, but NOT WATER OR DUST 

PROOF. Never place compressor in soft sand while running the compressor. Vibration from the 

compressor will cause the compressor to settle into soft sand, resulting in compressor drawing in 

foreign particles. Never expose compressor to water while running the compressor.

USER MANUAL

Summary of Contents for 40044

Page 1: ...OMPRESSOR HEAVYWEIGHT SERIES PART NO 40044 IMPORTANT It is essential that you and any other operator of this product read and understand the contents of this manual before installing and using this product SAVE THIS MANUAL FOR FUTURE REFERENCE USER MANUAL ...

Page 2: ...r explosive materials or where aerosol products are being used Do not operate this product where oxygen is being administered Do not pump anything other than atmospheric air Never use this product while sleepy or drowsy Do not use any tools or attachments without first determining maximum air pressure for that tool or attachment Never point any air nozzle or air sprayer toward another person or an...

Page 3: ...of 155 PSI 5 During inflation of tire pressures between 130 PSI to 155 PSI if you stop inflation the compressor may not restart This is completely normal since inline pressure is greater than cut on pressure of the pressure switch and less than cut off pressure of the pressure switch To restart compressor deflate tire pressure to below 130 PSI reconnect tire chuck to tire valve stem and resume tir...

Page 4: ... injury NOTE Your air compressor is equipped with a pressure switch cut on at 130 PSI cut off at 155 PSI This feature is designed to protect the air compressor from over pressure causing permanent damage to your air compressor The pressure switch automatically turns off the motor when the internal pressure of the air compressor reaches the factory set cut off pressure of 155 PSI and restarts when ...

Page 5: ... before high speed traveling onto roadways 5 Use heat resistant minimum 200 PSI rated working pressure extension hose Do not use aftermarket hoses with less than 200 PSI working pressure Some aftermarket hoses may not be suitable for use with this air compressor due to heat and pressure typically generated by this type of air compressors CAUTION Never touch the air compressor or fittings connected...

Page 6: ...e red plug from compressor s air inlet port 3 Install inlet air filter onto compressor s air inlet port Thread tape Not Recommended 4 Hand tighten inlet air filter IMPORTANT For optimal compressor performance replace filter element periodically Clogged filter will drastically reduce compressor flow rate and performance 400P RVS AUTOMATIC PORTABLE COMPRESSOR USER MANUAL ...

Page 7: ... cuts out repeatedly 1 Lack of proper ventilation or ambient temperature is too high 2 Compressor valves failed 1 Move compressor to well ventilated area or area with lower ambient temperature 2 Replace compressor Excessive knocking or rattling 1 Worn bearing on eccentric or motor shaft 2 Cylinder or piston ring is worn 1 Service or replace compressor Compressor air flow lower than normal or canno...

Page 8: ...ithout the prior express written consent of VIAIR VIAIR does not make any representations warranties or guarantees express or implied as to the accuracy or completeness of the Manual Users must be aware that updates and amendments will be made from time to time to the Manual It is the user s responsibility to determine whether there have been any such updates or amendments Neither VIAIR nor any of...

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