Ingersoll-Rand Xe-145M, Pocket Manual

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85

Verify the main contactors are not opening when
the machine is loaded/unloaded

Overridden when Control Power Loss is unchecked

Check to make sure K2 relay is working
Check Motor Rotation
Xe Software Logic for R & RS machines:
This will occur if 3APT is less than 1 psi (.07 Bar) on a
compressor, 3 seconds after starting (6 seconds if the
compressor is equipped with a soft starter or airend
discharge temperature is less than 50 °F). This
condition can be caused by the motor running in
reverse. Once correct motor rotation is established, this
trip will not be checked again unless power is removed
from the controller.
Recommended Checks

Ensure the main contactors are pulling in. First set
is KM3 + KM1 (WYE connection). Then KM3 drops
to energize KM1 + KM2 (Delta Run).

If the main contacts are pulling in ensure the sensor
3APT is reading correctly.