Section 8
TROUBLESHOOTING
34
8.2 TROUBLESHOOTING (Continued)
SYMPTOM PROBABLE CAUSE REMEDY
COMPRESSOR DOES NOT Inlet Air Filter Clogged Check for maintenance message
BUILD FULL DISCHARGE on Supervisor II display. Inspect and/
PRESSURE (CONT.) or change element.
Inlet Valve Not Fully Open Check actuation of inlet poppet valve.
Pressure Sensor and/or Connections Check connections from trans--
at Fault ducer. If adequate, replace trans--
ducer.
OIL MNTN Message Plugged Oil Filter Replace oil filter.
Oil Differential Check oil differential switch, switch open
or if machine has P3 & P4 pressure
dP2 > 20 psi (1.4 bar) transducer, check transducers.
LINE PRESSURE RISES ABOVE Pressure Sensor P2 at Fault Check connections from trans--
UNLOAD SETTING ducer. If adequate, replace
transducer.
Unloading Device (i.e., Blowdown Check operation of unloading device
Valve, Inlet Poppet Valve, Optional
Spiral Valve) Failed to Operate
Solenoid Valve Failed Check operation of solenoid valve.
to Operate
Control Air Signal Leaks Check tubework feeding control signal
for leaks.
Control Air Signal Filter Clogged See compressor Operator’s Manual for
filter assembly service.
EXCESSIVE FLUID CONSUMPTION Clogged Return Line Strainer or Orifice Clean strainer screen and o -- ring. Re--
placement kit available. Clean orifice.
Damaged or Improperly Gasketed Inspect separator elements and gaskets.
Separator Elements Replace if damaged.
Fluid System Leaks Check tube/pipework for leaks.
Fluid Level Too High Drain excess fluid.
Excessive Fluid Foaming Drain and change fluid.
NOTE ON TRANSDUCERS:
Whenever a sensor is suspected of fault, the
recommended cause of action is to measure
the signal (pressure, temperature, etc.) with
an alternate calibrated instrument and
compare readings. If conflicting, the electri-
cal and/or tubing connections should be in-
spected, and if no faults are evident, then re-
place 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
calibration affects the offset but not the slope
of the pressure and temperature calcula-
tions. Because of this, the most accurate
method is to heat or pressurize the transduc-
er to its operating value. If this is too difficult,
room temperature/open atmosphere calibra-
tion is adequate. Calibration may only be
done while machine is stopped and un-
armed.
To enter calibration mode, you must press
the following keys in sequence while in the
default status display mode: “
”,
“
Y
”
,
“
B
”
, PROG.
Once in calibration
mode, you will see a screen like the follow-
ing:In the above example, “0” refers to the
CAL P1
970
amount of adjustment (in psi or
_
F, “97” (6.7
bar) refers to the current value of P1).To
make adjustments, Press the “
Y
”(UPAR-
ROW) key to increase the value, press the
“
B
” (DOWN ARROW / LAMP TEST) key
to decrease the value. The number on the left
will increase or decrease always showing the
total amount of adjustment. Maximum ad-
justment is
¦
7. The
DISPLY
key exits, wip-
ing out changes to the current item, while
saving changes to any previous items. The
PROG
key saves the current item and ad-
vances to the next. All temperatures and
pressures may be calibrated individually.
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