![background image](http://html1.mh-extra.com/html/gardner-denver/twistair-ewdq-d/twistair-ewdq-d_operating-and-service-manual_3887813062.webp)
13–11–602 Page 52
ADVISORY TROUBLE SHOOTING GUIDE (Continued)
Message
Action Needed
LOW AMB TEMP
The temperature was less than 40
_
F (4
_
C) at: (1) the airend discharge,
(2) oil injection or (3) the package service connection. Ensure that the
compressor is located in a room kept above freezing.
SHUTDOWN TROUBLE SHOOTING GUIDE
Message
Action Needed
All shutdowns are indicated on the keypad by the word “SHUTDOWN” on the top line of the display and one of the
following messages on the lower line of the display. The red indicator in the Status area will be steadily lit while the
conditions exist and will flash after the condition has been corrected. Perform service as indicated. Press the
[STOP/RESET] key to clear the shutdown.
BAD FLOAT SWITCH
120 volts is present at both terminal 10 and 11 of the terminal strip. This
indicates a likely wiring error to the float switch; check and correct. It may
also indicate a short within the switch itself.
CHECK CN4
Both inputs at connector 4 of the controller are off. The most common
cause for this is that the connector plug has been pulled out. Plug the con-
nector back in firmly.
CHECK CN7
All inputs at connector 7 of the controller are off. The most common cause
for this is that the connector plug has been pulled out. Plug the connector
back in firmly.
CHECK CN8
120 volts has been removed from ALL inputs to connector 8 of the control-
ler. The most common cause for this is that the connector plug has been
pulled out. Plug the connector back in firmly.
CHNG H2O FILTER
The differential pressure across the water filter has risen to over 40 psig.
Change the filter to ensure an adequate flow of coolant.
EMERGENCY STOP
The Emergency Stop button has been pressed. Pull it back out to its nor-
mal position. If the button has not been pressed, check that the contact
block is firmly mounted in the right or left (not center) position of the opera-
tor. Check for loose connections which would remove 120 volts from con-
nector 8–8 of the controller.
EXTERNAL DEVICE
120 volts has been removed from terminal 7 of the terminal strip. This is
normally shipped jumpered directly to terminal 9, but the jumper may be
removed to add a field installed shutdown switch. Reset the external
switch.
HIGH DIS TEMP R
This indicates that the controller has detected a rapid temperature rise in
the airend discharge. This normally would indicate a loss of coolant injec-
tion into the airend. Completely check all water piping, the filter, and flow
controls for blockage or freezing. This may also be caused by a loose con-
nection at connector 7 of the controller. Monitor the temperature carefully
during restarts after servicing.
HIGH DISCH TEMP
This indicates that the controller has detected temperature in excess of
the programmed high temperature limit at the airend discharge. The most
common cause for this is inadequate package cooling. Ensure proper air
flow for aircooled units, or adequate cooling water for water cooled units.
Monitor the temperature carefully during restarts after servicing.
Summary of Contents for TWISTAIR EWDQ D
Page 14: ...13 11 602 Page 4 FIGURE 1 6 AIR WATER SCHEMATIC FIGURE 1 7 OIL SCHEMATIC...
Page 17: ...13 11 602 Page 7 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 18: ...13 11 602 Page 8 DECALS 216EAQ077 206EWD077 222EAQ077 221EAQ077 208EAQ077...
Page 35: ...13 11 602 Page 25 FIGURE 4 2 FLOW CHART FOR SET UP PROGRAMMING...
Page 44: ...13 11 602 Page 34 FIGURE 4 6 CONTROL TUBING SCHEMATIC 206EWD797 A Ref Drawing...
Page 48: ...13 11 602 Page 38 FIGURE 4 10 WIRING DIAGRAM FULL VOLTAGE 202EWD546 REF DRAWING...
Page 49: ...13 11 602 Page 39 FIGURE 4 11 WIRING DIAGRAM WYE DELTA 203EWD546 REF DRAWING...
Page 50: ...13 11 602 Page 40 FIGURE 4 12 AUTO SENTRY ES CONTROLLER DISPLAY...
Page 53: ...13 11 602 Page 43 FIGURE 5 2 FLOW DIAGRAM AIR COOLED 202EWD797 B Ref Drawing...
Page 54: ...13 11 602 Page 44 FIGURE 5 3 FLOW DIAGRAM WATER COOLED 203EWD797 A Ref Drawing...
Page 68: ......