Section 9
COMPRESSOR MAINTENANCE
AND TROUBLESHOOTING
34
Figure 9---5 Inlet Control Valve
* Repair Kit P/N 02250050---614
*
*
WARNING
!
Before doing compressor maintenance, discon-
nectcompressor frompower sourceand lockout
powersource.Isolatecompressorfrom linepres-
sure by closing r ecommended discharge shut---
off valve andreleasing all internal pressurefrom
compressor.
WARNING
!
Assure that line pressure gauge on compressor
indicates “ZERO” pressure before any work is
done. Failure to comply can cause injury.
1. Remove the two (2) rear access panels which
cover the inlet valve assembly.
2. Identify and t ag the plastic lines connected to
the blowdown valve and disconnect.
3. Remove the three (3) capscrews from the inlet
valve cover.
4. Remove cover (with blowdown valve attached)
and o --- rings.
5. Removepiston,pistonspring,checkspringand
valve stem.
6. Inspect and clean all parts.
7. Assemble valve stem, check spring, piston
spring and piston into inlet valve housing.
8. Lubricate new o---rings and installthe innerand
outer o---rings onto cover.
9. Position cover in inlet valve housing and install
capscrews. Tighten capscrews to 6 ft.---lbs.
(8.1Nm).
10. Reconnect the plastic lines to the appropriate
fittings on the valve.
11. Assemble two (2) rear access panels on the
compressor.
12. Start compressor and check for leaks.
9.7 TROUBLESHOOTING INTRODUCTION
(COMPRESSOR)
The information contained in the Troubleshooting
chart is based upon both the actual applied situa-
tionsandextensivetestingatthefactory.Itcontains
symptoms and usual causes for the described
problems. However, DO NOT assume that these
are the only problems that may occur. All available
data concerning the trouble should be systemati-
cally analyzed before undertaking any repair or
component replacement procedures.
Adetailedvisualinspectionisworth performingfor
almostany problems which may prevent unneces-
sarydamagetothecompressor.Alwaysremember
to:
a. Check for loose wiring.
b. Check for damaged piping.
c.Check forpartsdamagedbyheatoranelectrical
hortcircuit,usuallyapparent bydiscoloration or
a burnt odor.
Should your problem persist after making the rec-
ommended check, consult your nearest Sullair
representative or the Sullair Corporation factory.
9.8 TROUBLESHOOTING--COMPRESSOR
SYMPTOM PROBABLE CAUSE REMEDY
T1 HI Message Discharge Temperature Exceeded
225_F (107_C) for Pre --- Alarm
Discharge Temperature Exceeded
235_F (113_C) for Shutdown
Ambient Temperature Exceeded Improve local ventilation (i.e.,
105_F(41_C) remote intake of process and/or
cooling air).
Fluid Level in Sump is Too Low Check/correct fluid level.
Thermal Valve Malfunctioned Check/replace thermal valve.
Cooler Fins are Dirty Clean cooler fins.
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