UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
16 Chapter 2. Operation
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CHAPTER 2. OPERATION

2.1 Local Indicators

Location and Identification: Refer to Figure 7.
Description: There are three (3) indicators located on the ACU+ Controller’s front panel. Refer to Table 2
for the function of the indicators.
Figure 7
Local Indicators and Menu Navigation Keys Locations
Indicator
Normal State
Fault State
Fault Cause
Status
(Green)
On
Off
No input power to the ACU+
Controller.
Minor
Alarm
(Yellow)
Off
On
The system has one or more active
Minor alarms. Alarm conditions are
programmable.
Critical/Major
Alarm (Red)
Off
On
The system has one or more active
Critical or Major alarms. Alarm
conditions are programmable.
Table 2
Local Indicators
ESC
ENT
USB
Port 10/100MEthernet
Port(RJ-45)
M820B
Criticalor Major
AlarmIndicator
(Red)
MinorAlarm
Indicator(Yellow)
Status
Indicator
(Green)
Menu
Navigation
Keys
Status
Indicator
(Green)
MinorAlarm
Indicator(Yellow)
Criticalor Major
AlarmIndicator
(Red)
ESC ENT
MenuNavigation Keys
USB
Port
10/100MEthernet
Port(RJ-45)
M820D