Troubleshooting; Calibration - Sullair LS-10 25HP Operators Manual And Parts Lists

Section 7
MAINTENANCE
TROUBLESHOOTING -- SUPERVISOR II (CONTINUED)
SYMPTOM (DISPLAY)
COMPRESSOR DOES NOT
BUILD FULL DISCHARGE
PRESSURE
LINE PRESSURE RISES ABOVE
UNLOAD SETTING
EXCESSIVE FLUID CONSUMPTION
LIQUID WATER IN COMPRESSED
AIR LINES
NOTE ON TRANSDUCERS:
Whenever a sensor is suspected of fault, the recom-
mended cause of action is to measure the signal
(pressure, temperature, etc.) with an alternate cali-
brated instrument and compare readings. If read-
ings conflict, the electrical and/or tubing connec-
tions should be inspected, and if no faults are evi-
dent, then replace the sensor and re---evaluate
against the calibrated instrument.

7.11 CALIBRATION

The Supervisor II has software calibration of the
pressure and temperature probes. This calibration
affects the offset but not the slope of the pressure
and temperature calculations. Because of this, the
most accurate method is to heat or pressurize the
transducer to its operating value. If this is too diffi-
cult, room temperature/open atmosphere calibra-
40
PROBABLE CAUSE
Air Demand Exceeds Supply
Inlet Air Filter Clogged
Inlet Valve Not Fully Open
Pressure Sensor and/or Connections
at Fault
Pressure Sensor P2 at Fault
Unloading Device (i.e., Blowdown
Valve) Failed to Operate
Solenoid Valve Failed
to Operate
Control Air Signal Leaks
Control Air Signal Filter Clogged
Damaged or Improperly Gasketed
Separator Element
Fluid System Leaks
Fluid Level Too High
Excessive Fluid Foaming
Water Vapor Condensation From Cooling
and Compression Occurs Naturally
Check air service lines for open
valves or leaks.
Check for maintenance message
on Supervisor display. Inspect and/or
change element.
Check actuation and position.
Check connections from trans---
ducer. If adequate, replace trans---
ducer.
Check connections from trans---
ducer. If adequate, replace
transducer.
Check operation of unloading device.
Check operation of solenoid
valve.
Check tubework feeding control
signal for leaks.
Service filter assembly.
Inspect separator element and
gasket. Replace if damaged.
Check tube/pipework for leaks.
Drain excess fluid.
Drain and change fluid.
Remove the water vapor from compressed
air prior to distribution through the air system.
Check operation of aftercooler and moisture
separator. Install a compressed air dryer sized
for the flow and dryness level required. (Note:
Filters may also be required to remove
particulates, liquid oil aerosols or for oil vapor
removal. Change cartridges as recommended
by the filter manufacturer). Check all drain traps
routinely to insure their proper operation. Main---
tain them regularly.
tion is adequate. Calibration may only be done while
machine is stopped and unarmed.
To enter calibration mode, you must press the fol-
lowing keys in sequence while in the default status
display mode: " ", "Y", DSP , "B
Once in calibration mode, you will see a screen like
the following:
CAL
0
In the above example, "0" refers to the amount of ad-
justment (in psi or _F, "97" refers to the current value
of P1).
To make adjustments, Press the "Y" (UP ARROW)
key to increase the value, press the "B
ARROW / LAMP TEST) key to decrease the value.
The number on the left will increase or decrease al-
REMEDY
", PRG.
P1
97
" (DOWN