11.9.3 Remove the solenoid valve from the assembly.
11.9.4 Transfer the ttings to the correct ports on the
new three-way valve. Install the new valve back onto
the assembly. Firmly push the 1/4" tubes back into
the correct ttings to make leak proof connections.
Reconnect the harness to the coil.
11.10 GENERAL CLEANING
11.10.1 Keep the unit free of dust and dirt. Using
a general purpose cleaner, dampen a soft cloth and
periodically wipe down the exterior surfaces.
12.0 ALARMS AND TROUBLESHOOTING
12.1 VIEWING DRYER ALARM EVENTS
12.1.1 The LCD will capture and display only the
primary alarm that was the cause of the problem.
Other alarms generated due to the primary one
will not be displayed but will be indicated in the
Segregated Alarm output. Besides the Alarm, a time
and date stamp will also be captured to help with
possible troubleshooting. Entries in to the Dryer
Events Logs will hold up to 10 events of the latest
occurrences for review. To access - Go to MENU,
choose VIEW DRYER EVENTS, press OK. Use
the UP and DOWN arrows to select #1 through #10
events. Number 1 event is the last event to occur.
12.2 THE HELP KEY
12.2.1 A HELP key will be shown on the display
upon occurrence of an Alarm. Press the HELP key
to access assistance for troubleshooting the primary
alarm. Use the UP and DOWN arrows to select
the possibilities. Press the MORE key for more
information about that choice. Press EXIT to return to
the previous MENU. Make another choice and hit the
MORE key again. In most cases this will guide you
to the most likely cause of the alarm. If not, call the
Dielectric Technical Support Department with Model
and date of Manufacture for additional support.
12.3 MAINTENANCE AND THE ATS
12.3.1 If the ST series Air Dryer is connected to an
ATS300/300 Plus, turn ON the Manual Operation
Switch located on the ATS/Alarm Interface Board at
the rear of the Dryer. This will remove the Dryer from
active or standby duty from ATS300 control. NOTE:
The LCD will display MANUAL OPERATION and
the LED will be ashing RED.
NOTE: For ATS300’s it’s okay to leave the BUS
Cable connected. Removing them could disrupt
Air Dryers that are located down the line. Once
Maintenance or the alarm has been resolved, TURN
OFF the MANUAL OPERATION switch.
NOTE: If troubleshooting alarms, it may be helpful
to disconnect the ATS300 Plus 9-pin Bus Cable to
isolate the fault.
12.3.2 In Manual Operation mode only, individual
sensors may be selected for alarm override. It’s
recommended to select one at a time to help determine
the root cause of the alarm, (i.e. - bad sensor).
CAUTION: Do not leave the air dryer unattended
while operating in manual operation.
To override a sensor, go to MENU, Manual
Operation, the display will prompt a message to
toggle the Manual Operation Switch (located on the
back of the Dryer on the Alarm/ATS Interface Board)
to ON. Select which sensors to override and press OK
to enter Manual Mode. NOTE: ipping the manual
operation switch to ON rst will automatically bring
up the sensor selection screen without the prompt.
Turning OFF the switch will exit manual operation
and return the dryer to normal operation. The dryer
will shutdown and then automatically restart and run
through its start-up routine.
12.4 CLEAR AND RESET ALARM
12.4.1 To Clear and Reset an Alarm from the Display,
press MENU, choose RESET DRYER ALARM,
press OK – Press YES to reset the alarm and then
press EXIT to return to the scrolling display. See
16Appendix “F” for Alarm Description and Timing
for further information.
15
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