Tait TB8100 User Manual page 144

Output
Output voltage
high
Output voltage
low
Output current
high
134 Part G: Alarms
If mains power fails when the PMU is in battery protection mode, the base
station shuts down instead of using battery power. This protects the battery.
1. The system has been operating on battery power; the battery has become
flat and mains is restored. No action required.
2. The battery is not being charged. Check the PMU's auxiliary output line, if
it is being used for charging.
3. The battery is flat. Replace it.
4. The minimum battery voltage is set too high.
The PMU measures the voltage and the amperage of its DC output to the PA
and to the reciter.
The PMU's DC output (nominally 28 V) is higher than the fixed maximum of
32 V.
The PMU's DC output (nominally 28 V) is lower than the fixed minimum of
24 V.
The PMU is providing more than 15 A of current and is automatically limiting
its output, lowering the output voltage. There is a short circuit or the PMU is
faulty.
MB8100-00-00-806 © TEL 2003