If UPS transfer to backup mode for 10sec and transfer back to line mode
operation without any code or alarm, means the battery set is healthy,
otherwise UPS may give code to indicate the cause of failure.
4.3.4. Beep Codes
The following table contains common UPS statuses with their beep codes.
UPS Status
Beep Code
UPS faulty, Inverter shut down. All
functions inhibited.
Long Continuous Beep
Control keypad error
Long Continuous Beep
UPS faulty, loads continue to be supplied
via Inverter or Bypass.
Single beep every two seconds
In battery mode
Single beep once per second
Battery low
Quick and short successive beeps
Confirm RS-232 port receiving
two quick and short beeps
Service mode okay
one quick and short beep
5.
UPS System Block Diagram
Figure 4.1
Figure 4.1 illustrates the True On-Line Double Conversion architecture
of the UPS system. The major modules consist of:
1) An AC-to-DC power converter (rectifier) with PFC control circuit
2) A DC-to-AC high frequency inverter
3) An intelligent battery charger
4) A bank of stationary, maintenance-free batteries
5) A DC-to-DC push/pull converter control circuit
6) A static bypass loop
7) Input and output EMI filters
The table below provides a summary of the UPS operating modes under
various utility AC power source and battery conditions.
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Содержание Continuity 1000
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