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Duty Cycle: This air compressor pump is capable of running continuously. However, to prolong
the life of your air compressor, it is recommended that a 50%-75% average duty cycle be
maintained; that is, the air compressor pump should not run more than 30-45 minutes in any
given hour.
TROUBLESHOOTING GUIDE
This section provides a list of the more frequently encountered malfunctions, their causes
and corrective actions. The operator or maintenance personnel can perform some corrective
actions, and others may require the assistance of a qualified BOSTITCH technician or your
dealer
Problem
Excessive air tank pressure-safety valve pops off ............................................................................1, 2
Air leaks ............................................................................................................................................................3
Air leaks in air tank or at air tank welds ..................................................................................................4
Air leaks between head and valve plate .................................................................................................5
Air leaks from safety valve...........................................................................................................................6
Knocking Noise .............................................................................................................................................6
Pressure reading on the regulated pressure gauge drops when an accessory is used............7
Compressor is not supplying enough air to operate accessories.......................8, 9, 10, 11, 12, 22
Regulator knob has continuous air leak.................................................................................................13
Regulator will not shut off air outlet........................................................................................................13
Motor will not run...............................................................................................6, 14, 15, 16, 17, 18, 19, 20
Squealing Sound...........................................................................................................................................21
TROUBLESHOOTING CODES
CODE
POSSIBLE CAUSE
1
Pressure Switch (H) does
not shut off motor when
compressor reaches cut-
out pressure
2
Pressure Switch (H) cut-
out too high
3
Tube fittings are not tight
enough
4
Defective air tank
5
Leaking seals
6
Defective Safety Valve (G) Operate Safety Valve (G) manually by pulling on ring. If valve
7
Regulator is not adjusted
correctly for accessory
being used
8
Prolonged excessive
use of air
9
Compressor is not large
enough for accessory
10
Hole in air hose
11
Check valve restricted
12
Air leaks
POSSIBLE SOLUTION
Set the Auto/Off switch to OFF, if the unit does not shut off
contact a BOSTITCH factory service center or a BOSTITCH
authorized service center.
Contact a BOSTITCH factory service center or a BOSTITCH
authorized service center.
Tighten fittings where air can be heard escaping. Check
fittings with soapy water solution. Do Not Overtighten.
Air tank must be replaced. Do not repair the leak.
Risk of bursting. Do not drill into, weld
or otherwise modify air tank or it will weaken. The air
tank can rupture or explode.
Contact a BOSTITCH factory service center or a BOSTITCH
authorized service center.
still leaks, it must be replaced.
It is normal for some pressure drop to occur when an
accessory is used, adjust the regulator as instructed in
Regulator
under Features if pressure drop is excessive.
NOTE:
Adjust the regulated pressure under flow conditions
while accessory is being used.
Decrease amount of air usage.
Check the accessory air requirement. If it is higher than the
CFM or pressure supplied by your air compressor, a larger
compressor is needed to operate accessory.
Replace air hose.
Contact a BOSTITCH factory service center or a BOSTITCH
authorized service center.
Tighten fittings.
15
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