AIR IN ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
SECTION 7: TROUBLESHOOTING
090012-OP_r0
PAGE - 111
COMPRESSOR (CONTINUED)
Compressor system over-
pressures
This condition will cause a
compressor shutdown, and a
fault light will turn on. Before
restarting the compressor,
determine the cause of the over-
pressure. May also cause the
relief valve to open.
Pressure switch setting too high
Reset pressure switch. Refer to
Section
2.2.7, Adjustable Pressure Switch
, and
Section 6.6.14, Adjusting the Pressure
Setting
. Replace if switch continues to
deviate from setting.
Pressure switch malfunction
Check for operation/damage: repair or
replace.
Unload solenoid valve defective
Replace solenoid valve.
Leak in air control line
Check for leaks and take corrective action.
Restriction in control line
Clean if soiled; if ice is present, clear and
remove.
Damaged/kinked control line
Check line for damage (wear, kinks, etc.).
Re-route, re-tie or replace if necessary
(refer to
Appendix A, A.6 Hose Installa-
tion Guide
for assistance in running or
checking hose lines).
Control line connections are not prop-
erly seated/poor connection quality
Check lines for proper seating/ensure line
ends have been cut cleanly and are square
(
DO NOT
use wire cutters: use a loom cut-
ting tool or a clean, sharp razor blade).
Inlet valve Teflon “O” ring popped out of
groove
Replace “O” ring: Refer to
Section 6.6.2,
Repairing the Air Inlet Valve
.
Order inlet
valve repair kit—see
Table 9A: Recom-
mended Spare Parts List
.
Inlet valve piston is stuck in down posi-
tion.
Check for proper operation with an auxiliary
air source—replace or rebuild inlet valve.
Consult
Section 6.6.2
.
Compressor shaft seal is leaking
Replace shaft seal with available kit. Refer
to
Section 6.6.7
.
Minimum pressure/check valve is
malfunctioning
Rebuild or replace check valve: Refer to
Section 6.6.10
; order check valve repair
kit—see
Table 9A: Recommended Spare
Parts List
.
Pressure gauge is malfunctioning
Check gauge for proper operation; replace if
necessary and check controls.
Defective safety valve
Replace safety valve.
Plugged coalescer
Replace coalescer. Refer to
Section 6.6.6,
Replacing the Spin-on Air/Oil Coalescer
.
Continued on next page
7.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Possible Cause
Corrective Action
