Solenoid Valve (02250044; Troubleshooting; Calibration - Sullair DR13 125H Operator's Manual And Parts List

8.2 TROUBLESHOOTING (CONTINUED)
SYMPTOM/MESSAGE
COOL FLT
COMPRESSOR DOES NOT
BUILD FULL DISCHARGE
PRESSURE
LINE PRESSURE RISES ABOVE
UNLOAD SETTING
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 temperature 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.
PROBABLE CAUSE
Cooling Fan Motor Starter Overloads
Tripped
Air Demand Exceeds Supply
Inlet Air Filter Clogged
Inlet Air Valve Not Fully Open
Transducer P2 Malfunction
Blowdown Valve Leaking
or Sluggish
Limit Switch Controlling BVD Failed
to Operate
Defective LP Stage
Blowdown Valve Failed to
Activate
Inlet Throttling Valve Not Fully Open
Limit Switch Controlling BVD Failed
to Operate
Transducer P2 Malfunction
Control Air Filter Clogged

TROUBLESHOOTING

REMEDY
Reset after heater elements cool down.
Should trouble persist, check whether
motor starter contacts are functioning
properly.
Check air service lines for open
valves or leaks.
Check for maintenance message
on Supervisor II display. Change
element.
Check actuation and butterfly disc
position.
Low oil pressure defective control
solenoid valve.
Check connections from trans---
ducer. If adequate, replace trans---
ducer.
Refer to Component Manual for
valve maintenance.
Check limit switch and cam adjuster
on butterfly valve.
Consult Sullair Service Department.
Refer to Component Manual for
valve maintenance.
See inlet valve adjustment.
Check limit switch and cam adjuster
on butterfly valve.
Check connections from transducer.
If adequate, replace transducer.
Refer to Component Manual for valve
maintenance. Check operation of limit
switch.
To enter calibration mode, you must press the
following keys in sequence: "LOGO", DELTA,
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" refers to the current value of
P1).
CAL P1
0
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 keys 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 the next.
Items following P1 calibration are (in order): P1,
P2, P3, P4, T1, T2, T3, T4 and T5 calibration.
Section 8
97
39