Calibration; Shutdown Settings - Sullair LS-20T Operator's Manual

6.12 TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM
SEP MNTN Message
COMPRESSOR DOES NOT
BUILD FULL DISCHARGE
PRESSURE
AIR MNTN Message
LO COOL Message
(Water---cooled packages only)
(Air---Cooled or Water---Cooled
w/canopy)
NOTE ON TRANSDUCERS:
Whenever a sensor is suspected of fault, the rec-
ommended cause of action is to measure the sig-
nal (pressure, temperature, etc.) with an alternate
calibrated instrument and compare readings. If
readings conflict, the electrical and/or tubing con-
nections should be inspected, and if no faults are
evident, then replace the sensor and re---evaluate
against the calibrated instrument.

6.13 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-
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: "
PROBABLE CAUSE
Plugged separator
∆P1 > 10 PSI (0.7 bar)
Air Demand Exceeds Supply
Inlet Air Filter Clogged
Inlet Valve Not Fully Open
Pressure Sensor and/or Connections
at Fault
Blowdown Valve Leaking
Inlet Differential
Water Pressure Feed Below 10 psig
(0.7 bar)
Fan Motor Overload Tripped
", "Y", DSP, "B " , PRG.
SUPERVISOR II DESCRIPTION
Replace separator elements.
Check P1 & P2 pressure transducers.
Check air service lines for open
valves or leaks.
Check for maintenance message on
Supervisor display. Inspect and/or
change element.
Check actuation and butterfly disc
position.
Check connections from transducer.
If adequate, replace transducer.
Repair or replace.
Replace inlet filter, check inlet switch.
Check cooling water supply (i.e.,
closed valves).
Reset after heater elements cool.
Once in calibration mode, you will see a screen like
the following:
In the above example, "0" refers to the amount of
adjustment (in psi or _F, "97" (6.7 bar) refers to the
current value of P1).To make adjustments, Press
the "Y" (UP ARROW) key to increase the value,
press the "B
key to decrease the value. The number on the left
will increase or decrease always showing the total
amount of adjustment. Maximum adjustment is ¦
7. The DSP key exits, wiping out changes to the
current item, while saving changes to any previous
items. The PRG key saves the current item and ad-
vances to the next. All temperatures and pressures
may be calibrated individually.

6.14 SHUTDOWN SETTINGS

For shutdown settings, warnings and pre-alarms,
consult factory.
Section 6
REMEDY
CAL P1
0 97
" (DOWN ARROW / LAMP TEST)
25