Troubleshooting Guide - Speedaire 40HU29 Instructions Manual

TROUBLESHOOTING GUIDE

Symptom
Unit fails to start - Motor makes
no noise
Unit starts but does not get to
full speed
Unit does not make any or very
little air
Unit runs very noisy
Oil smoke out of inlet on
shutdown
Possible Cause(s)
1. Insufficient power to compressor
2. Unit wired incorrectly
3. Wrong voltage supplied to unit
4. Loose electrical connections
5. Wrong size wiring
6. Blown fuse and / or tripped breaker
7. Starter overload tripped
1. Insufficient power to compressor
2. Loose electrical connections
1. Drain valve open
2. Air leak
3. Restricted or blocked intake
1. Damage to the compressor
2. Loose fasteners
3. Loose pulleys or belts
Normal operation
Corrective Action
1. Source electric to the compressor is either the incorrect
voltage, insufficient wire size to carry the load, the fuse
box or breaker box is not sufficient to carry the load
requirements to the compressor.
2. Any wiring other than what is stated in the manual
could cause a malfunction (see Wiring Section).
3. Make sure voltage is correct with the motor wiring (see
Wiring Section).
4. The entire electrical system should be checked by
a certified electrician. The incoming wires and the
compressor electrical connections should be checked.
Loose connections will cause malfunctions.
5. Check that wire size is rated for the current of the
compressor. State and local codes vary widely and
need to be checked before installation.
6. The breaker and fuses required for this unit must be
time delay.
A tripped breaker or blown fuse may result from a
direct short to ground, high current draw, improper
wiring, incorrect fuse or breaker size and/or type. This
needs to be evaluated by a service center or certified
electrician.
7. Check and reset if necessary. If the overload trips after
the initial reset, refer to the section of the manual that
covers this issue.
1. Source electric to the compressor is either the incorrect
voltage, insufficient wire size to carry the load, the fuse
box or breaker box is not sufficient to carry the load
requirements to the compressor.
2. The entire electrical system should be checked by
a certified electrician. The incoming wires and the
compressor electrical connections should be checked.
Loose connections will cause malfunctions.
1. Make sure the drain valve at the bottom of the tank is
closed.
2. Check the entire system for leaks, including the
compressor unit and any piping attached to the
compressor
3. Make sure that the air intake of the compressor is
not blocked in any way and that the inlet solenoid is
illuminated showing that it is open
1. Check to make sure the compressor has not been
damaged in the shipping or installation. Make sure the
belt guard was not damaged. Belt guard should not be
making contact with flywheel or pulley.
2. Check all bolts and nuts to assure they did not loosen
during shipping.
3. Check to assure pulley and bushings are correctly
tightened.
A small amount of oil may be released with the high
pressure air that vents through the air filter.
Do not remove air filter housing
or perform any maintenance with
pressure in the air end or air pressure tank.
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