5.17 Troubleshooting Guide - Sullair 600H User Manual

SECTION 5
C S A
ONTROL YSTEM DJUSTMENT
Refer to Figure 5-9. Prior to adjusting the control
system, it is necessary to determine the desired
operating pressure range as well as the maximum
pressure at which the machine is to operate. This
pressure must not exceed the maximum operating
pressure which is stamped on the machine serial
number plate.
1. Start the machine and let it warm-up and
enter full "RUN" mode.
2. Open service valve slightly until engine tries
to speed up. Slowly close the service valve.
With service valve closed, check and adjust
the pressure at the reducing regulator to a
minimum of 60 psig (4.1 bar) and not to
exceed 85 psig (5.2 bar). With service valve
still closed, and the <PRESSURE> switch in
the "Low" position, adjust the low-pressure
back-pressure regulator so the service pres-
sure is between 115 to 125 psig (7.9 to 8.6
bar) with the engine at 1400 rpm. Open the
service valve to load the compressor to
maintain 100 psig (6.9 bar) discharge pres-
sure. Operating speed should be 1800 RPM
on the controller panel. If not, repeat step,
but adjust the unload service pressure up or
down as needed until 100 psig (6.9 bar) is
maintained when engine speed is 1800 rpm.
3. For 150 psig (10.3 bar) "H" machines, turn
the <PRESSURE> switch to "High" position.
Close the service valve and set the "High"
pressure control regulator to maintain 165 to
175 psig (11.4 to 12.1 bar) discharge pres-
sure. Open the service valve to maintain 150
psig (10.3 bar) and check for 1800 RPM full-
load speed. If lower speed is observed, raise
the setting of the low pressure control regu-
lator until rated speed is achieved.
4. For 175 psig (12.1 bar) "HH" machines, turn
the <PRESSURE> switch to "High" position.
600H, 700HH, 750, 750H, 750HH, 825, 900H, 1050 USER MANUAL
—D P
UAL RESSURE
Close the service valve and set the "High"
pressure control regulator to maintain 190 to
200 psig (13.1 to 13.8 bar) discharge pres-
sure. Open the service valve to maintain 175
psig (12.1 bar) and check for 1800 RPM full-
load speed. If lower speed is observed, raise
the setting of the low pressure control regu-
lator until the desired speed is achieved.
5. For 200 psig (13.8 bar) "HH" machines, turn
the <PRESSURE> switch to "High" position.
Close the service valve and set the "High"
regulator to 215 to 225 psig (14.8 to 15.5
bar) discharge pressure. Open the service
valve to maintain 200 psig (13.8 bar) and
check for 1800 RPM full-load speed. If lower
speed is observed, raise the setting of the
low pressure control regulator until the
desired speed is achieved.

5.17 TROUBLESHOOTING GUIDE

The following Table 5-2:Troubleshooting Chart is
based on both the data obtained from actual tests
conducted at our factory and real applied situations.
It contains 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
systematically analyzed before undertaking any
repairs or component replacement procedures.
• Check for loose wiring.
• Check for damaged piping.
• Check for parts damaged by heat or an electrical
short circuit, usually apparent by discoloration or a
burnt odor.
Should your problem persist after making the
recommended check, consult your nearest Sullair
representative or the Sullair.
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