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13–11–602 Page 54
SHUTDOWN TROUBLE SHOOTING GUIDE (Continued)
Message
Action Needed
LOW WATER PRESS
The controller has attempted to start and load the compressor, but pres-
sure is not building up in the water reservoir. This may indicate either a
failure of the motor to turn the compressor, or a failure of the inlet valve
to open. If the latter, check also the wiring and piping to solenoid valves
IVO and IVC; these are both turned on to load up the compressor.
LV RELAY
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.
MOTOR CONTACT
The controller has attempted to turn off the compressor, but is still receiv-
ing a return signal from the starter’s auxiliary contact. Check that the start-
er operates freely and that the contact block is properly installed on the
starter.
MOTOR OVERLOAD
One of the motor overload relays within the electrical control box has
tripped, indicating high motor shaft load, low voltage, or excessive imbal-
ance in the incoming power. Disconnect and lock out power, open the box,
and press the reset buttons one at a time – the tripped one will click when
reset. Measure motor amps and take corrective actions to get all currents
within the motor nameplate rating. If overloads had not tripped, check for
the cause that 120 volts was removed from connector 8–1 of the control-
ler.
MOTOR STARTER
The controller has attempted to start the compressor, but did not receive
a return signal from the starter’s auxiliary contact. If the starter does not
pick up when attempting to start, check that connector 9 of the controller
is plugged in firmly, and check the starter coil. If the starter does pick up,
but this message appears, check that the auxiliary contact block is proper-
ly installed on the starter and wired to connector 8, terminal 4.
OPEN THERM
The controller has detected an open connection to thermistor: (A) air end
discharge, (B) oil injection, or (C) final package discharge to the service
valve. This normally indicates a loose or broken connection at the control-
ler connector 4 or 7; check and correct the connection. This could also
be indicating a broken wire or thermistor probe.
OPEN XDUCER
Signal voltage has fallen too low at transducer: (A) Final discharge, (B)
Water,or (C) Oil. This error is frequently the result of the transducers being
improperly zeroed. Disconnect the air lines to the transducers and follow
the procedure indicated in the adjustment instructions. This may also indi-
cate a loose connection of the red wire to the transducer or a defective
transducer. Check connections, or replace transducer if necessary.
PHASE RELAY
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.
POWER FAILURE
The power to the compressor unit has been turned off and back on. Press
[STOP/RESET] and select an operating mode.
PUMP/FAN CONTACT
The controller has attempted to turn off the pump and fan, but is still receiv-
ing a return signal from the starter’s auxiliary contact. Check that the start-
er operates freely and that the contact block is properly installed on the
starter.
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: ......