13-11-608 Page 64
Message
Action Needed
LV RELAY
See “External Device”, page 24, for details.
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
See “External Device”, page 24, for details.
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 EWD99E
Page 7: ...13 11 608 Page 2 Figure 1 2 PACKAGE ILLUSTRATION AIR COOLED 302EWD797 A Ref Drawing...
Page 8: ...13 11 608 Page 3 Figure 1 3 PACKAGE ILLUSTRATION WATER COOLED 303EWD797 A Ref Drawing...
Page 9: ...13 11 608 Page 4 Figure 1 4 WATER COOLED SCHEMATIC 300EWD797 D Ref Drawing...
Page 10: ...13 11 608 Page 5 Figure 1 5 AIR COOLED SCHEMATIC 301EWD797 D Ref Drawing...
Page 30: ...13 11 608 Page 25 Figure 4 2 FLOW CHART FOR SETUP PROGRAMMING 300EWC1255 Ref Drawing...
Page 44: ...13 11 608 Page 39 301EWD546 B Ref Drawing Page 2 of 2...
Page 46: ...13 11 608 Page 41 302EWD546 B Ref Drawing Page 2 of 2...
Page 48: ...13 11 608 Page 43 303EWD546 B Ref Drawing Page 2 of 2...
