User Instructions

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I. Within 5 minutes the PSU will start signaling a failure in the battery circuit.
II. The ALARM LED will start blinking.
III. The APS and ALARM technical outputs will change status into opposite.
IV. Acoustic indication will be activated.
b) Reconnect the wires in the battery circuit.
c) The power supply should return to normal operation, indicating the initial status, within 5
minutes after the battery test is completed.
3. PSU operation indication.
3.1 Optical indication.
The PSU is fitted with three LED lights at the front panel
AC voltage
 ON - PSU supplied with 230V AC voltage
 OFF - no 230V AC supply
24V DC output voltage
 ON - 24V DC voltage at the MIC output of the power supply
 OFF - no 24V DC voltage at the MIC output of the power supply
FAILURE
Collective failure
 blinking - failure
 OFF – normal operation
3.2 Technical outputs.
The power supply is fitted with relay indication outputs changing state upon the occurrence of a specific event:
 EPS FLT – output of 230V AC power failure indication.
Output indicating 230V AC power failure. Under normal status – with the 230V AC supply on - the
output is closed (open *); in the case of power failure the output is switched to an open state (shorted *)
after 10 seconds.
 APS FLT– output of battery failure indication.
Output indicating failure in the battery circuit. Under normal status – with the 230V AC supply on - the
output is closed (open *); in the case of failure the output is switched to an open state (shorted *). Failure
can be triggered by the following events:
- Faulty battery
- Undercharged battery
- Disconnected battery
- High resistance of the battery circuit
- Battery voltage below 11,5V during battery-assisted operation
- Battery fuse failure
- No continuity in the battery circuit
 PSU FLT – output of power supply failure indication
Output indicating PSU failure. Under normal status – with the 230V AC supply on - the output is closed
(open *); in the case of failure the output is switched to an open state (shorted *). Failure can be triggered
by the following events:
- Battery voltage below 13V
- Battery voltage higher than 14,6V
- Failure of the battery charging circuit
- F
AUX
fuse failure
- Too high battery temperature
- Temperature sensor failure
- Internal damage of the power supply
 ALARM – technical output of collective failure indication.
Output indicating collective failure. Under normal status – with the 230V AC supply on - the output is
closed (open *); in the case of failure at any EPS, APS, or PSU output, the output is switched to an open
state (shorted *).
* Depending on the position of the jumper for configuring the relay contacts, see Table 1, item 8