13-11-607 Page 58
Message
Action Needed
LV RELAY
120 volts has been removed from J1-4 of the expansion board. This is
normally 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 receiving a
return signal from the starters’ auxiliary contacts. Check that the starter
operates freely and that the contact blocks are 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 imbalance 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 5-3 of the controller.
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 6 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 properly installed on the
starter and wired to connector 1, terminal 4.
OPEN
THERMISTOR
The controller has detected an open connection to the airend discharge
thermistor. This normally indicates a loose or broken connection at the
controller connector 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
Injection, or (C) Reservoir. This usually indicates 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 J1-4 of the expansion board. This is
normally 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.
SHORTED
THERMSTR
The controller has detected a shorted connection to the airend discharge
thermistor. This normally indicates a faulty connection (e.g. wire strands
touching) at the controller connector 7; check and correct the connection. 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 Injection, or (C) Reservoir. This may indicate a loose
connection of the black wire to the transducer or a defective transducer.
Check connections, or replace transducer if necessary.
Summary of Contents for PUREAIR EWC99C
Page 7: ...13 11 607 Page 2 Figure 1 2 PACKAGE ILLUSTRATION 307EWC797 B Ref Drawing...
Page 8: ...13 11 607 Page 3 Figure 1 3 AIR WATER SCHEMATIC 308EWC797 F Ref Drawing...
Page 25: ...13 11 607 Page 20 Figure 4 2 FLOW CHART FOR SETUP PROGRAMMING 300EWC1255 Ref Drawing...
Page 38: ...13 11 607 Page 33 Figure 4 4 WIRING DIAGRAM FULL VOLTAGE 305EWC546 B Ref Drawing Page 1 of 2...
Page 39: ...13 11 607 Page 34 305EWC546 B Ref Drawing Page 2 of 2...
Page 41: ...13 11 607 Page 36 306EWC546 B Ref Drawing Page 2 of 2...
