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TROUBLESHOOTING AUTOSENTRY T ELECTRONIC CONTROLLER
The electronic controller provides all of the control functions necessary to operate the compressor
package. Five indicator lights on the electronic controller provide information on its operating status.
Whenever unexpected operation occurs, carefully note which indicators are lit.
GREEN POWER-ON INDICATOR
This light indicates that power is supplied to the controller. If this light is off, it indicates:
- The disconnect, breaker, or fuses serving the compressor are open
- Transformer fuses are open
- The control board fuse is open or
- There is a break in the wiring
If the light is lit steadily, it indicates that the controller has been properly reset and may be operated. Auto
restart has not been enabled.
If the light is flashing rapidly, power has been interrupted, and the controller needs to be reset. Turn the
switch to the OFF position to reset the controller.
If the light flashes slowly, it indicates that the controller is operational, and is set for automatic restart after
power failure.
If the controls drop out while attempting to start, and this light starts flashing, the wiring to the compressor
is insufficient for the load. Check for loose connections or undersized wiring to the compressor package.
GREEN
AUTOMATIC MODE INDICATOR
This light simply indicates the operating state of the controller. When it is off, the compressor operation is
stopped. If the switch is in the OFF position, switch it to ON to start the compressor. If the light is off
while the switch is in the ON position, the overload relay has tripped.
When the operating switch is turned on, the light will light to indicate that automatic operation is enabled.
The light will be on steadily if the pressure switch closes to load the compressor. The light flashes slowly
while running unloaded or while the motor is stopped.
If this light is off, but the top red led flashes, refer to high voltage indication below.
YELLOW HIGH / LOW TEMPERATURE WARNING
This indicator lights if temperatures at either probe are near freezing or near the high temperature
shutdown temperature. It will not shut down the compressor, but advises that operating conditions are
near the limits of the compressor package. If the conditions improve, the light will begin flashing after all
temperatures are back within normal operating range. If the compressor is located in a cold area, provide
shelter and heat to prevent icing in the package. If this indicator comes on while the compressor is
running, check oil level and proper flow of cooling air through the cooler. Provide adequate ventilation to
the package to reduce ambient temperatures.
This may be reset by simply switching the operating switch to the OFF position. The controller will recall
any warning following a power interruption, and must be reset with the switch.
Summary of Contents for INTEGRA EFB99A
Page 9: ...13 8 619 Page 2 300EFB797 A Ref Drawing Figure 1 2 COMPRESSOR ILLUSTRATION...
Page 12: ...13 8 619 Page 5 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 13: ...13 8 619 Page 6 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 30: ...13 8 619 Page 23 300EFB542 C Ref Drawing Figure 4 3 WIRING DIAGRAM...
