Ingersoll-Rand R110IU-10, Manual

Page: 9 / 79

9
Blowdown system
Open the valve and
restart.
Check the operation of
the load solenoid
mechanically and
electrically
Check the operation of
the unloader valve −
strip and clean if
necessary.
Excessive current has
caused the motor
overload to trip
Check the actual operating
pressure and lower the
setting if it is too high.
Isolate the electrical supply
and check that the air end
and motor rotate freely.
Check the separator element
for excessive pressure drop
.
Set the motor overload on
star-delta at .67 * FLA * SF
of motor name plate data
tag. Measure current at
bottom of MOL
Compressor trips and
indicates motor
overload.
Fault T 3
Compressor shutdown
display shows
OVERPRESSURE.
Fault T 12, W 12
Isolation valve
Check for leaks, open service
valves or exceptionally high
demand.
Offline pressure set
too low
Air Demand too
high
Compressor will not
build up rated pressure.
Check the offline pressure
setting.