Man-1152_K25800_series_Power_Supply_Manual_05 Page 11 of 18
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This denotes variants tested & approved by the LPCB
6. Indicators
The diagnostic indicators visible along the edge of the power supply indicate the status of the unit as follows:
AC Normal – Mains power is connected.
Heartbeat (flashing slowly) – The processor is functioning normally.
DC Out on – The 24V DC output is supplying power to the load.
General fault – The battery charge voltage is too high
Earth fault – The 24V DC supply is connected to earth.
Battery low – The battery voltage is below 21 Volts.
Battery disconnected – The battery is disconnected or the charging circuit has
reached higher impedance than it should.
7. Commissioning
Once all connections have been made and checked for safety, ensure that batteries are correctly connected and switch
on the mains power.
Check that the AC Normal LED is on.
Check that the Heartbeat LED is flashing slowly.
Check that power is being supplied to the load with a volt meter. A voltage of 24V +/- 1V should be read.
Remove the mains power and ensure that the batteries continue to supply power to the load.
With the mains removed, the AC Normal indicator should switch off after approximately 30 seconds.
Switch the mains back on and disconnect the battery. The load should continue to operate and the Battery
disconnected LED should light.
This completes the basic commissioning checks.
Q4
C19
C93
RV1
L17
R109
T2
GND
OUT ON
DC
BEAT
DISCON
BAT
HRT
BAT
FLT
LOW
AC
FLT
NORM
GEN
+
slot
sl
ot
slo
t
AC Normal
Heartbeat
General fault
DC Out on
Earth fault
Battery low
Battery disconnected
