Ch. 19. Air Temperature Controller Sec. 19.10. Alarms
19.9.3.3. Error: 2 Phase Power
The ATC requires single phase power. This error is typically caused by the wrong type of wall power
or:
• The earth ground connection may be faulty
• There is current flowing in the neutral power line which may indicate a disconnected neutral line
and the return path is though the earth ground connection.
Note Contact your facilities personnel to confirm correct wiring exists. Once repaired you can clear the
error.
19.10. Alarms
The ATC has two thermal switches that will trip an audible alarm when their respective temperature
is reached. The alarm is an indication that an unsafe temperature has been reached inside the ATC.
This condition will generate a critical error to display in the status box and cause the ATC to go into a
disabled state until the error is cleared by a factory service technician.
In the event that the alarm sounds and the ATC does not shut the heater power off, an additional thermal
switch on the main AC power will activate turning the unit completely off. This switch will reset after
the ATC has cooled down but will reactivate if the unit continues to overheat.
BETA
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