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The possible Alarm messages are as follows.
CHECK INLET CONTROL- This will occur if the
machine is unloaded and the inlet vacuum is less than
3 psig (.2 bar).
CHECK INLET CTRL SYS 1 (2) - This will occur if the
inlet butterfly valve fails to open or close properly. A 1
means the inlet valve failed to closer properly. A 2
means the inlet valve failed to open properly.
CHECK MOTOR ROTATION- This will occur if the
machine is started and the compressor has incorrect
rotation.
CONTROL POWER LOSS- This will occur if the
controller detects a loss of the 110 VAC or 120 VAC
control power.
EMERGENCY STOP- This will occur if the Emergency
Stop button is engaged. The button must be
disengaged before the alarm can be cleared.
FAN MOTOR OVERLOAD- This will occur if a fan
motor overload is sensed.
HIGH AIREND DISCH TEMP- This will occur if the
airend discharge temperature is greater than 228°F
(109°C).
LOW SUMP AIR PRESSURE- This will occur if the
machine is running fully loaded and the sump pressure
drops below 20 psig (1.4 bar).
LOW UNLOAD SUMP PRESS- This will occur if the
machine is running unloaded and the sump pressure
is less than 15 psig (1.0 bar) for 15 seconds.
MAIN MOTOR OVERLOAD- This will occur if a drive
motor overload is sensed.
CHECK SET POINTS- This will occur if the controller
has determined some of the data stored in memory
contains unacceptable values. When this occurs, the
sensors should be calibrated and all the set points
checked. It is normal for this alarm to occur after
changing controller software.
REMOTE START FAILURE- This will occur if the
Remote Start button is pressed after the machine is
running or if the Remote Start button remains closed.
REMOTE STOP FAILURE- This will occur if the
Remote Stop button remains open and either Start
button is pressed.
SENSOR FAILURE 1AVPT (or 3APT, 4APT,
5CPT,2CTT, 2ATT, 3CTT) - This will occur if a sensor
is recognized as missing or broken. This does not
apply to sensor 4ATT.
STARTER FAULT 1SL (2SL)- This will occur if the
starter contacts open while the machine is running. It
will also occur if the machine is given the stop
command and the starter contacts do not open. 1SL
refers to the auxiliary circuit on starter contact 1M. 2SL
refers to the auxiliary circuit on starter contacts 2M
and 1S.
STEPPER LIMIT SWITCH- This will occur if both limit
switches are activated at the same time.
INVALID CALIBRATION- This will occur during the
calibration process if the sensor reads greater than
20% of scale.
LOW COOLANT PRESSURE- This will occur if the
compressor is running and the following conditions are
met. The coolant must be less than 1 psi and either
the sump pressure is greater than 10 psi or the inlet
vacuum is less than 12 psi.