11
HP15P004SS man v.171212
Air Compressor
Troubleshooting
Always inspect the compressor before use, and make sure it is in good working condition. Make sure all air
vents are clear. Check the power cable to make sure it is intact and free from cracks, bare wires etc. Avoid
using solvents when cleaning plastic parts, most plastics are susceptible to damage from the various types of
commercial solvents.
Trouble
Possible Cause
Corrective Action
Compressor will not start
1. Blown fuse or circuit breaker
tripped
1. Replace or reset fuse/circuit breaker
2. Loose electrical connections
2. Check wiring connnections
Low pressure
1. Restricted air filter
1. Replace air filter
2. Defective check valve
2. Replace check valve
3. Air leak in safety valve
3. Check valve by pulling on ring. If
condition persists, replace valve
Safety valve releases
Defective pressure switch
Replace pressure switch
Pressure in tank falls
1. Air leaks at joints
1. Allow the compressor to build pres-
sure in the tank, to the max pressure if
possible. Spray or brush soapy water
on all air connections and look for bub-
bles. Tighten leaky connections. Do not
over-tighten.
2. If the problem continues, contact
customer support for further advice.
Unloader valve leaks when
pump is not running
Unloader valve seal defective
Allow air in the air tank out until all
pressure is released. Remove the un-
loader valve plug and clean the valve
seal. If damaged, replace seal and
re-install.
Compressor stopped and will
not re-start
1. Thermal overload protector has
engaged due to motor overheat-
ing
1. Check that the main supplied
voltage corresponds to the compres-
sor specifications. An inadequate
extension cord (too thin or too long)
can cause the motor to overheat due
to voltage drop. Excessive use (over
1 hour continuous) can cause motor
overheating. Allow the motor to cool
down.
2. Motor windings burn-out
Contact customer support
Motor does not start and
makes a humming sound
Capacitor burn-out
Contact customer support
Motor does not start or starts
slowly
Low voltage electrical supply to
motor
Check that the main supplied voltage
corresponds to the compressor speci-
fications.
An inadequate extension cord (too thin
or too long) can cause the motor to
overheat due to voltage drop.
Check power quality at outlet
Compressor runs noisily and
metallic sounds are heard
Compressor will not come to
max pressure
Head gasket or reed valve dam-
aged.
Stop the compressor and contact cus-
tomer support
Compressor doesn’t provide
as much air as when new
and/or cuts off after a much
shorter time period.
1. Tank has reduced capacity due
to water retention
2. Pressure switch is out of adjust-
ment
1. Open drain valve to release water
2. Contact customer support
Pump unit does not stop
when the tank reaches maxi-
mum working pressure.
Defective or pressure switch out
of adjustment
Stop the compressor immediately (risk
of explosion) and contact customer
support