Arris CHP Max5000, Equipment Manual

Page: 56 / 267

2-24 CHP Max™ Headend Optics Platform Chassis, Controllers and Power Supplies Rev D
The factory-default threshold and deadband values for each parameter are listed in
Table 2.10. A deadband or hysteresis value prevents alarm oscillation. Once a threshold is
exceeded, the alarm can only be downgraded if the parameter is at least a deadband below
the threshold value.
➤
To adjust the alarm threshold limits
1. Follow the procedures for Local Monitoring with the CHP-CMS Craft Management
Software —page 1-12.
2. Double-click the Fan module identifier in the module inventory or double-click on
any of the eight fans on the rear of the chassis in the image map to open that Fan
Bay’s management window.
3. Right click on any of the eight Fan current meters and select Configure from the
shortcut menu. Refer to Figure 2.15.
4. In the Alarm Setup area, drag the slider or enter the desired alarm limit value for the
Major low, Minor low, Minor high, and Major high. Click OK to save these alarm limit
values.
Table 2.10 Factory-default Threshold and Deadband Values
Parameter Major
Low
Minor
Low
Nomina
l
Minor
High
Major
High
Shutdown
Threshold
Deadband
Fan 1 through 8 Current
CHP-CHASSIS-19 (mA)
150 150 215 450 450 N/A 1
Fan 1 through 8 Current
CHP-CHASSIS-19Q,
CHP-CHASSIS-19Q-B,
CHP-CHASSIS-19S,
CHP-CHASSIS-19S-B, or
CHP-CHASSIS-19U (mA)
59 61 85 448 450 N/A 1
Note The alarm thresholds for Fan 1 current through Fan 8 current are not
independent. Changing the alarm threshold value on any of the fan meters will
automatically update the alarm thresholds on the other seven fan meters.