Section 8
TROUBLESHOOTING
39
8.2 TROUBLESHOOTING (CONTINUED)
SYMPTOM/MESSAGE PROBABLE CAUSE REMEDY
COOL FLT Cooling Fan Motor Starter Overloads Reset after heater elements cool down.
Tripped Should trouble persist, check whether
motor starter contacts are functioning
properly.
COMPRESSOR DOES NO T Air Demand Exceeds Supply C heck air service lines for open
BUILD FULL DISCHARGE valves or leaks.
PRESSURE
Inlet Air Filter Clogged Check for maintenance message
on Supervisor II display. Change
element.
Inlet Air Valve Not Fully Open Check actuation and butterfly disc
position.
Low oil pressure defective control
solenoid valve.
Transducer P2 Malf unction C heck connections from trans---
ducer. If adequate, replace trans---
ducer.
Blowdown Valve Leaking Refer to Component Manual for
or Sluggish valve maintenance.
Limit Switch Controlling BVD Failed Check limit switch and cam adjuster
to Operate on butterfly valve.
Defective LP Stage Consult Sullair Service Department.
LINE PRESSURE RISES ABOVE Blowdown Valve Failed to Refer to Component Manual for
UNLOAD SETTING Activate valve maintenance.
Inlet Throttling Valve Not Fully Open See inlet valve adjustment.
Limit Switch Controlling BVD Failed Check limit switch and cam adjuster
to Operate on butterfly valve.
Transducer P2 Malf unction C heck connections from transducer.
If adequate, replace transducer.
Control Air Filter Clogged Refer to Component Manual for valve
maintenance. Check operation of limit
switch.
NOTE ON TRANSDUCERS: Whenever a sen -
sor is suspected of fault, the recommended
cause of action is to measure the signal (pres-
sure, temperature, etc.) with an alternate cali-
brated instrument and compare readings. If
readings conflict, the electrical and/or tubing
connections should be inspected, and if no
faults are evident, then replace the sensor and
re---evaluate against the calibrated instrument.
8.3 CALIBRATION
The Supervisor II has software calibration of the
pressure and temperature probes. This calibra-
tion affects the offset but not the slope of the
pressure and t emperature calculations. Be-
cause of this, the most accurate method is to
heat or pressurize the transducer to its operating
value. If this is too difficult, room temperature/
open atmosphere calibration is adequate. Cal -
ibration may only be done while machine is
stopped and unarmed.
NOTE
Calibration mode may be entered from the de-
fault display mode when the machine is in
“MANUAL” SHUTDOWN.
To enter calibration mode, you must press the
following keys in sequence: “L OGO”, DELT A,
DSP, “
”, PRG.Onceincalibrationmode,you
will see a screen like the following: In the above
example, “0” refers to the amount of adjustment
(in psi or _F, “97” refers to the current value of
P1).
CAL P1
970
To make adjustments, Press the “DELTA” key to
increase the value, press the “
” key to de -
crease the value. The number on the left will in-
crease or decrease always showing the total
amount of adjustment. Maximum adjustments is
+ / --- 7 .
Other k eys operate the same as in program
mode. The “LOGO” key restores the original val-
ue of the current item. The “DSP” key exits, wip-
ing out changes to the current item, while saving
changes to any previous items. The “PRG” key
saves the current item and advances to t he next.
Items following P1 calibration are (in order): P1,
P2,P3,P4,T1,T2,T3,T4andT5calibration.
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