Gardner Denver INTEGRA EFB99A, Руководство по эксплуатации и обслуживанию

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13-8-619 Page 44
Low voltages may lead to high motor currents. The overload relay will sense these and shut down the
compressor to protect the motor. If voltage is low while the compressor is off, locate and correct the
cause. If the voltage drops low only while the compressor is running, look for poor connections or
undersized wiring.
If any of the starters or contactors within the box chatter, or if the electronic controller drops out while
attempting to start, it is a clear indication that the wiring is inadequate for the compressor. Look for poor
connections or undersized wiring.
OTHER CONTROLS TROUBLESHOOTING
If the overload relay has tripped, disconnect and lock out power. Check all line and load connections to
the starter for proper torquing. Check that the overload relay is properly adjusted per the instructions
glued inside the control box. Look for any additional sources of heat which may affect the overload relay.
Reset the relay by pressing the reset button on the relay. Close up the box and restore power.
If overload problems persist, contact a qualified electrician or motor shop. Measure all incoming voltages
with the motor off and at full load. Measure amps while running full load. Correct wiring if voltages are
outside of limits or if imbalance is found in any of the sets of readings. If voltages are okay, but amps are
high, reduce the load on the motor.
Remember that the overload relay is designed to protect both the motor and the wiring. Do not misadjust
this protection.
If the Auto light is steadily lit, but motor does not start, check the starter coil and wiring from the controller
to the coil.
If the Auto light is steadily lit, but the compressor does not load, check the solenoid valve coil, the motor
starter contact, and the wiring from the controller to these components.
If pressure drops, but the Auto light does not stop flashing, check the adjustment and connections of the
pressure switch.
If the pressure rises, but the Auto light stays lit steadily, check the adjustment and connections of the
pressure switch.
NOTICE
Gardner Denver factory remanufactured replacement compressor airend units
are available from your authorized distributor, on an exchange basis, for all
rotary screw compressor units.