EP203 AUTOMATIC EXTINGUISHER PANEL
Page 38 of 45 • EP203 AUTOMATIC EXTINGUISHER PANEL INSTALLATION MANUAL • Approved Document No. DFU0002032 Rev 4
The batte ry vol tage i s too l ow
Sy m p tom s : The panel is running on mains but may, or may not, be running on
batteries. The LCD unit displays ‘Batt=FAIL’.
Suggested actions :
1. If the mains supply has failed and the battery supply has been discharged to the
point where the voltage is critical, i.e. less than 21Vdc, the panel will
automatically turn off to avoid damaging the batteries by allowing them to
deep discharge. The panel will not restart unless fresh, fully charged batteries
are connected, or the mains supply is restored.
2. If the mains supply has not failed, but the total battery voltage is less than
21Vdc, the PSU will not charge the batteries to avoid damage to the charging
circuit. If the batteries can be charged, the panel will still show a power supply
fault until they have sufficient charge, at which point the power supply fault will
automatically be cleared. Depending on battery size and the depth of discharge,
this may take several hours. If the batteries are in poor condition they must be
replaced.
NOTE: The charging circuit is set up during manufacturing, and is temperature
compensated. There is no need to adjust the voltage.
3. If the batteries are in good condition and all the other checks have been
performed and no faults found, the Power Supply PCB is faulty and should be
replaced.
NOTE: Batteries that are not connected, or connected in reverse, or with
opposite polarities will also cause a power supply fault condition.
The S uppl y P re sent g reen LED i s N OT l i t
Sy m p tom 1: Both the mains supply and the standby batteries have failed. This could be
because the mains supply has failed and the batteries have been exhausted.
Suggested action:
1. Restore the mains supply and the Supply Present green LED should come back
on. However, if the batteries are discharged this will be recognized as a fault by
the EP203 panel and indicated as such. See “Battery supply voltage too low”
above.
Sy m p tom 2: The Power Supply PCB, the Main Control PCB and/or the cable that
connects them is faulty.
Suggested action:
1. If the mains supply is present (indicated by the Hazardous Voltages Present red
LED being lit on the Power Supply PCB), check that the connector cable between
the Power Supply PCB and the Main Control PCB is fully inserted at both ends. If
the connector cable is fully inserted either the Power Supply PCB and/or the Main
Control PCB and/or the connector cable are faulty and should be replaced.
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