3-10
Chapter 3: System Monitoring
3.1.2
Alarms and I
2
C Bus
This section details the system alarms and I
2
C bus.
Audible Alarms
You will hear an audible alarm if any of the following components fails:
•
Cooling modules
•
PSU modules
•
Hard disk drives
•
Sensors or presence detection circuitries
If you hear an audible alarm, ensure to read the error message on the terminal or PAC Mgmt.
Software screen to determine the cause of the alarm. Take appropriate actions to solve the problem.
You can turn off the alarm using the mute button on the front panel.
NOTE:
When the temperature exceeds the preset threshold, the
controller’s charger circuits stop
charging. You will receive a message that says
Thermal Shutdown/Enter Sleep Mode
. When the
temperature falls back to normal range, the super capacitor resumes charging.
I
2
C bus
The operating status of the PSU and cooling modules are collected via the I
2
C serial bus. If either of
the modules fails, the system detects the failure and you will be notified via the same methods stated in
audible alarms.
