heat-timer Mini-MOD-CNC Installation And Operation Manual page 27

SENSOR FAULT
All Off, All On
Button: MENU/<System Startup>/.../Sensor Fault
• The Sensor Fault will determine the operating status of all output stages that has their
Mode set to Auto when a sensor reads Short or Open.
• When All-On is selected, the Mini-MOD-CNC will turn all boilers On to 100% when the
System reads Short or Open and the outdoor temperature is below Outdoor Cutoff.
• However, when the Outdoor reads Short or Open, the Mini-MOD-CNC will try to maintain
the Maximum Water Temperature.
• When All-Off is selected, the Mini-MOD-CNC will turn all boilers Off when either the
System or the Outdoor sensor reads Short or Open. However, when the Outdoor reads
Short or Open, the Mini-MOD-CNC will try to maintain the Minimum Water Temperature.
NOTE
A good practice after performing any Startup menu modification is to check
all operating settings and adjustments to match the new settings.
059102-00 REV. C
12 SEQUENCING BOILER SETTINGS
Default: All On
All Off
All On
BACK
SENSOR FAULT
SAVE
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HEAT-TIMER CORP. 27