AP Expert VT-110, User Manual

Page: 65 / 84

16
Alarms
Topics Covered in this Chapter
▪ Alarm Display and Meaning
▪ Viewing Alarm Logs
▪ Alarm Conditions
▪ Setting the Alarm Start and Stop Temperatures
Alarm Display and Meaning
When an alarm occurs, the controller lights up the alarm pilot light and posts the alarm condition into the
alarm log menu. The following table gives a list of all possible alarm conditions. Another alarm situation
occurs when power to the controller fails. In this case, the alarm relay is activated. When the alarm relay
is activated, the normally open contact closes.
Display Meaning
Low Temp Alarm Low temperature alarm
High Temp Alarm High temperature alarm
Low Pressure Alarm Low static pressure alarm
High Pressure Alarm High static pressure alarm
Probe #1-6 Defect A temperature probe is defective
Outside Probe Defect Outside probe is defective
Pot Inlet Defect The inlet is defective
Water Spill
Water consumption is too high
Lo/Hi Water Usage The water consumption of the past 24 hours is too low or too high
compared to the water consumption of the previous 24 hours
SP probe defect The static pressure sensor is defective
RH Probe Defect The humidity probe is defective
Viewing Alarm Logs
1. Using the menu select arrow keys, navigate to Alarms .
The alarm log is displayed onscreen.
2. Use the down arrow key to scroll down.
890-00081 Expert VT-110 65