Section 7
MAINTENANCE
51
SEP MNTN MESSAGE (CONT.)
COMPRESSOR DOES NOT
BUILD FULL DISCHARGE
PRESSURE
LINE PRESSURE RISES ABOVE
UNLOAD SETTING
EXCESSIVE FLUID CONSUMP-
TION
dP1 > 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
Pressure Sensor P2 at Fault
Unloading Device (i.e., Blowdown Valve,
Sullicon Actuator, Optional Spiral Valve)
Failed to Operate
Pressure Regulator Maladjusted
Solenoid Valve Failed to Operate
Control Air Signal Leaks
Control Air Signal Filter Clogged
Clogged Return Line Strainer or Orifice
Damaged or Improperly Gasketed
Separator Elements
Fluid System Leaks
Fluid Level Too High
Excessive Fluid Foaming
Check P1 and P2 pressure transducers.
Check air service lines for open valves or leaks.
Check for maintenance message on Supervisor
display. Clean or change element.
Check actuation and butterfly disc position.
Check connections from transducer. If adequate,
replace transducer.
Replace valve.
Check connections from transducer. If adequate,
replace transducer.
Check operation of unloading device. See Section
7.5.
Check operation of pressure regulator.
Check operation of solenoid valve. See Section
7.5.
Check tubework feeding control signal for leaks.
Service filter assembly. See Section 7.5.
Clean strainer -screen and o-ring replacement kit
available. Clean orifice.
Inspect separator elements and gaskets.
Replace if damaged.
Check tube/pipework for leaks.
Drain excess fluid.
Drain and change fluid.
7.8 TROUBLESHOOTING GUIDE- SUPERVISOR (CONTINUED)
SYMPTOM PROBABLE CAUSE REMEDY
NOTE ON TRANSDUCERS:
Whenever a sensor is suspected of fault, the rec-
ommended cause of action is to measure the signal
(pressure, temperature, etc.) with an alternate cali-
brated instrument and compare readings. If con-
flicting, 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.
7.9 CALIBRATION
The Supervisor has software calibration of the pres-
sure and temperature probes. This calibration af-
fects 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 trans-
ducer to its operating value. If this is too difficult,
room temperature/open atmosphere calibration is
adequate. Calibration may only be done while ma-
chine is stopped and unarmed.
To enter calibration mode, you must press the fol-
lowing keys in sequence while in the default status
display mode: “ ”, “▲”, DSP, “ ” , PRG
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
CAL P1
0 97
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