13–11–602 Page 55
SHUTDOWN TROUBLE SHOOTING GUIDE (Continued)
Message
Action Needed
PUMP/FAN STARTER
The controller has attempted to start the pump and fan, 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 3.
SHORTED THERM
The controller has detected a shorted connection to thermistor: (A) air end
discharge, (B) oil injection, or (C) final package discharge to the service
valve. This normally indicates a faulty connection (e.g. wire strands
touching) at the controller connector 4 or 7; check and correct the connec-
tion. This could also be indicating a damaged wire or thermistor probe.
SHORTED XDUCER
Signal voltage has exceeded approximately 4.6 volts at transducer: (A)
Final discharge, (B) Water, or (C) Oil. This may indicate a loose connec-
tion of the black wire to the transducer or a defective transducer. Check
connections, or replace transducer if necessary.
WATER PRESS
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.
CONTROLS TROUBLE SHOOTING GUIDE
The following are recommended service actions. Observe all instructions noted elsewhere in this manual. All electri-
cal service is to be performed only by a qualified electrician.
Symptom
Recommended action
No display,
Check incoming power to the compressor unit. Ensure that the discon–
compressor stopped
nect is on and that fuses have not blown (or circuit breaker tripped). If pow-
er is being properly supplied to the control box, check the fuses located
at the fan starter, the control transformer fuses, and the fuse located on
the ES controller chassis near connector CN–6.
Compressor will
To operate, the controller must be placed into an operating mode (e.g.
not start.
“AUTO”); press the [STOP/RESET] key to put the control into the READY
state, then select a mode with the operating mode keys. In AUTOMATIC
and SEQUENCE modes, compressors will not start until the pressure
drops below the reset pressures.
Display indicates
The controller prevents attempts to start the main motor if the reservoir
“NOT BLOWN DOWN”
pressure is over 5 psig. Pressure continues to be relieved from the reser-
voir while this message is on, and the compressor will start automatically
after the pressure has dropped. If this message remains with NO pres-
sure in the reservoir, follow the transducer zeroing procedure found in the
controls adjustment section.
Display indicates
The controller is provided with an input for user–furnished remote con–
“REMOTE STOP”
trols. This display indicates that 120 volt is removed from terminal 6 of the
terminal strip. Check all connections of the factory installed jumper, or the
customer – provided controls, if applicable.
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: ......
