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QMB/T
Control Operations
This manual describes the microprocessor control for the QMB/T series of Air Compressors.
The decal at the right shows the control
layout for the electronic control panel.
The primary controls are on the right
hand side of the panel, with the selected
item being displayed on the LED digits
in the top window.
The LED lamps in a vertical column,
show the selected display parameter
and/or any alarm conditions.
On applying system power the LED
status lights will blink and the numeric
display will show the version number of
the software code installed. The system
will be ready to run with the 'POWER'
lamp on (showing that the control board
has power) and the 'SYSTEM PRESSURE' LED will be lit showing the pressure on the numeric display.
NOTE: A flashing '----' on the digit display, accompanied with an LED on the left, signifies a faulty
sensor, either the pressure transducer or the temperature probe.
A FAST blinking LED indicates that the labeled function has been tripped; an over-pressure condition or
motor overload or High Air Temperature (HAT) trip.
A SLOW blinking LED indicates that the Separator Differential Pressure (D.P.) switch has been tripped.
A STEADY LED, along with a message blinking on the display, indicates a service time-out. The
controller is programmed with recommended service intervals on the fluid filter and the air filter. These
filters should be checked and serviced when convenient.
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