Gardner Denver INTEGRA EFB99A, Руководство по эксплуатации и обслуживанию

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13-8-619 Page 43
RED COMPRESSOR TEMPERATURE
FAULT INDICATOR
These indicators light only if shutdown conditions exist with thermistors used to sense temperatures. The
shutdown conditions are (1) high temperature, (2) shorted thermistor or wiring, (3) open thermistor or
wiring or (4) extreme low temperature. The indicator will be lit steadily while the condition exists, and
flash after the condition is cleared. After the condition is cleared, the controller may be reset by switching
the operating switch to the OFF position. The controller will recall any shutdown following a power
interruption, and must be reset with the switch.
A steady light usually indicates an open or shorted cable. Check the connections and cable conditions
carefully, and service as required.
If the shutdown occurs while the compressor was running, the temperatures drop fairly rapidly, and you
will normally see a flashing indicator. Check for proper oil level. Check that the fan is operating properly,
the cooler is clean, and that the compressor is located where suitable cooling air is available.
The trip temperature may be lowered by following adjustment instructions, detailed in the controls section
of this manual.
HIGH VOLTAGE INDICATION
If the top red led flashes, but all other lights are off, the controller has sensed high voltage. Disconnect
power. Refer to the transformer connection information in the installation instructions, and connect the
transformer properly. Check that the motor is properly connected for the available voltage. Check all
other electrical components for damage. Restore power to the unit and verify proper voltage on the 120
volt secondary of the control transformer.
TROUBLESHOOTING VOLTAGE PROBLEMS
The compressor package has been designed, built, and tested to operate within one of the following
standard ranges:
200-208 Volts, 60 Hertz
220-230 Volts, 50 Hertz
230-240 Volts, 60 Hertz
380-416 Volts, 50 Hertz
460-480 Volts, 60 Hertz
575-600 Volts, 60 Hertz
Connection to higher voltages will reduce the life of electrical devices within the compressor package. As
voltages get further above the design range, other symptoms may show up.
High voltages may lead to high motor currents. The overload relay will sense these and shut down the
compressor to protect the motor.
Overvoltage protection is provided to protect the electronic control. If the controller senses high voltage, it
will attempt to turn off its outputs, and will latch into a protective mode. The lower 4 lights will all go off,
the top red light will flash.
If the control transformer primary fuses blow, check that the transformer is properly connected for the
incoming line voltage.
Operation with lower voltages will reduce motor life and load capacity. As voltages get further below the
design range, other symptoms may show up.