On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
Chapter 3 Component Failure
Handling
3-26
III.
The voltage of the power output of the power module is
too high
When the output voltage of the power module is at 30.5
!
0.5V,
the module will shut down automatically and the alarm indicator (Alm)
on the power module panel will be on. An overvoltage alarm will be
reported. Such problem will not be solved automatically, therefore the
power module should be replaced.
IV.
The power module is over-heated
When the ambient temperature of the power module is too high
or the heat dissipating system is not working properly, the power
module will be overheated and stop working. The alarm indicator on
the module panel will be on and report an overheat alarm. When the
temperature decreases to an acceptable level, the module will
automatically start working again.
If the ambient temperature is OK and the module fan is running
but the module is still too hot, there must be something wrong with
the module itself. It will have to be replaced then.
V.
The voltage of the power Input of the power module is
too low
The input voltage of the power module is a negative value,
therefore, when the absolute value of the input voltage is less than
36.5
!
1V, the power module will stop working. The alarm indicator on
the module panel will be on and report an undervoltage alarm. When
the absolute value of the input voltage is greater than 38.5
!
1V, the
power module will resume to normal working status automatically.
