107
24.3. System Status Screen
System Status Screen
The display shows operating mode if in normal operation. Alarms will interrupt the display.
Alarm messages will appear on the display and remain there until dismissed. Dismissing an alarm is just clearing the
alarm from using the entire screen to display the condition(s). The alarm condition still exists and up to two alarm codes
are displayed along the right side of the screen above the thermostat demand type status. To dismiss an alarm, press the
BACK
button.
COOLING
UNOCC
RAT: 76.0F
DAT: 57.0F
ZONE AND DISCHARGE
AIR TEMPERATURES
OCCUPIED (OCC) OR
UNOCCUPIED (UNOCC)
FIRST TWO ALARMS THAT
ARE ACTIVE
NORMAL MODE
MESSAGE
Y1
THERMOSTAT
DEMAND TYPE
74, 93
LON ON
NETWORK
STATUS
Figure 32. System Status Display
24.3.1.
Network Status
The second line on the left side (see figure 32) is used for displaying network status. The status will indicate either ON or
OFF for the network employed. Network types are listed in table 60.
Table 60. Network Status
Screen Label
Network Type
LON
LonTalk
BACNET
BACnet
LCONN
L-Connection
RTU
Rooftop Unit stand-alone mode status indicator
24.3.2.
Unit Operation
This section describes the display and control buttons, how to configure the unit, and how to read stored configuration
data, status, and alarms.
The M3 unit controller is an input and output junction point. If in the thermostat mode, thermostat inputs at P297 result
in an output to unit components. If the heartbeat LED is not flashing, see table 62 on page 109 for heartbeat operation.
If the display shows an alarm. If the thermostat input indicating lights are not responding appropriately, check the
thermostat or a DDC control acting as thermostat inputs into P297.
Basic cooling and heating functions may be energized to test major unit components by using the M3 unit controller
testing function or by using jumper wires on the Field Wiring Termination plug P297.
24.3.3.
Alarm Status Display
Figure 33 shows how alarms are displayed. Alarming value may indicate the condition which triggered the alarm
(temperature, voltage, pressure, time, etc.).
ALARM 173
2.4.2014 12: 02: 24
ALARMING VALUE = 0
AIR FLOW SWITCH CON
ALARM(S) ARE PRESENT -
ALARM CODE, ALARMING
VALUE, AND DATE TIME STAMP
(HOUR, MINUTE AND SECONDS)
OF ALARM EVENT.
COMPLETE ALARM LISTING AND
DESCRIPTION ARE AVAILABLE BY
SCROLLING DOWN (A DOWN AR
ROW ON THE SCREEN INDICATES
MORE TEXT FOLLOWS)
WHILE THE ALARM IS SHOWING ON THE STATUS SCREEN, PRESS THE
HELP BUTTON FOR FURTHER DETAILS CONCERNING THE ALARM.
Figure 33. Alarm Code Readout Example
