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Problem
The compressor does not run.
The motor hums, but does not run
or runs slowly.
The fuses blow or the circuit
breaker trips repeatedly.
The thermal overload protector cuts
out repeatedly.
The air receiver pressure drops
when the compressor shuts off.
There is excessive moisture in the
air discharge.
Air is leaking from the compressor.
The compressor runs continuously.
The compressor vibrates.
The air output is lower than normal. The inlet valves are broken.
TROUBLESHOOTING
Possible Cause
Loss of power or overheating.
There is no electrical power being
supplied to compressor or the power
switch is in the OFF position.
A fuse has blown at the power supply.
A breaker has tripped at the power
supply.
Thermal overload open.
The pressure switch is bad.
Tank is full of air.
The voltage from the power supply is low.
The wire gauge or the length of
extension cord is wrong.
The motor winding is shorted or broken.
The unloader or check valve is defective.
The fuse size is incorrect or the circuit
is overloaded.
The gauge wire or the length of
extension cord is wrong.
The unloader or check valve is defective.
The voltage from the power supply is low.
A poorly ventilated room is causing the
motor to overheat.
The gauge wire or the length of
extension cord is wrong.
The connections are loose or leaking
(fittings, tubing, etc.).
The drain valve is loose.
The check valve is leaking.
There is excessive water in the air tank.
The humidity is high.
The hose connection is loose or
improperly sealed.
The air hose is broken or damaged.
The tank drain valve is open.
The pressure switch is defective.
The usage is excessive.
The compressor mounting bolts are loose. Tighten mounting bolts.
The connections are leaking.
(continued)
Check for proper use of extension cord.
Check to be sure the compressor is plugged
in and the power switch is in the ON position.
Replace the fuse at the power supply.
Reset the breaker at the power supply and
determine why the problem happened.
First unplug the compressor and wait until the
motor cools. Locate and push motor reset.
Replace the pressure switch.
Compressor will turn on when tank
pressure drops to cut-in pressure.
Check the voltage with a voltmeter.
Use the correct wire gauge and length
extension cord.
Contact ROLAIR Customer Service (800)310-3573
Contact ROLAIR Customer Service (800)310-3573
Check the fuse or breaker at the power supply is the correct
size and type. Be sure to use only time-delay fuses to avoid
overloading a curcuit, disconnect other electrical appliances
from circuit or operate compressor on its own branch circuit.
Use the correct wire gauge and length
extension cord.
Take the compressor to a service center.
Check the voltage with a voltmeter.
Move the compressor to well-ventilated
area.
Check for proper gauge wire and cord
length.
Check all the connections with soapy water and look for
bubbles. Tighten any loose conections until the leak stops.
Tighten the drain valve.
Contact ROLAIR Customer Service for assistance.
Do not disassemble check valve while
air is in tank - empty the all the air out of
the tank before dissasembly.
Drain the tank to remove water.
Move the compressor to an area of less humidity or use
an air line filter to reduce moisture discharge in the tank.
Ensure connections are sealed with
thread sealing tape and tightened.
Replace the air hose.
Ensure the tank drain valve is closed.
Contact ROLAIR Customer Service for assistance.
Decrease the amount of tool run-time; the compressor is
not large enough to supply the air requirement of the tool.
Contact ROLAIR Customer Service for assistance.
Apply thread sealing tape to fitting and tighten.
19
Solution
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