26
APP-001f
SEPT 2016
TOUCHSCREEN CONTINUOUSLY INDICATES
“SYSTEM INITIALIZING”.
The touchscreen will indicate SYSTEM INITIALIZING if the
system is restarting and the purger is already cooled down.
One example of when this might occur is immediately after
pressing the SYSTEM RESET button. The touchscreen
will continue to indicate SYSTEM INITIALIZING until the
liquid make-up level sensor cycles dry. The APPT will then
energize the liquid solenoid until the liquid make-up level
sensor reads wet, at which time it will change to STARTUP
DELAY MODE. The purpose of SYSTEM INITIALIZING is
to ensure the heaters will not energize until the purger
evaporator has been filled with liquid at least one time.
If SYSTEM INITIALIZING appears for only a few minutes
this is normal. If SYSTEM INITIALIZING appears for longer
than 30 minutes, then the reason should be investigated.
REASON 1:
The liquid make-up level sensor is defective
Check:
Remove the cover of the electrical enclosure on
the liquid make-up level sensor. The red LED inside will
be on if it senses liquid, and off if it senses gas. If the
red LED is either always on or always off, and does not
change state, the sensor may be defective.
Action:
Replace the liquid make-up level sensor if defective.
See also Caution section, page 28.
WATER BUBBLER DEVELOPS EXCESSIVE
MINERAL COATING.
REASON 1:
Hard water.
Action:
Add vinegar to the bubbler water. Then, clean with
the supplied brush. Use a water conditioning housing and
cartridge in the water supply line to the purger.
Refer to drawing 2003-07 for additional instructions for
the APPT models
DISPLAY INDICATES “PANEL NOT SET TO HMI”
The PLC is programmed to work with the obsolete keypad
and monochrome Touchscreen as well as the color
Touchscreen. Both the obsolete monochrome Touchscreen
and the color Touchscreen must operate as HMI.
REASON 1
: New Touchscreen is installed but set in
keypad mode
ACTION 1
: Go to Menu Screen 3 and press HMI Display
button. On following screen press HMI ON button.
DISABLED PURGE POINTS WON’T SAVE OR
WILL STILL ENERGIZE WHEN DISABLED
Purge points which aren’t needed can be disabled on
Menu Screen 1 by simply touching the screen at the purge
point to be disabled
REASON
: Touchscreen was replaced and it was set in
keypad mode
ACTION
: Go to Menu Screen 3 to change HMI display first.
Then go to Menu Screen 1 to disable the purge point(s).
PROBLEM RECORDING TO DATA LOGGER
The color Touchscreen has a data collection feature
which will save data points to a removable USB thumb
drive or a SD Card. The data collection feature can be
turned on or off.
REASON
: Data collection feature is turned on but there
isn’t a storage device plugged into the color Touchscreen
ACTION
: Insert either a USB thumb drive or SD Card into
the color Touchscreen
ACTION 2
: Go to Menu Screen 3 and press DATA
COLLECTION button. Press button at top left so it says
DAQ DISABLED
SECTION 5 SERVICE, TROUBLESHOOTING, & PARTS
