EP203 AUTOMATIC EXTINGUISHER PANEL
Approved Document No. DFU0002032 Rev 4 • EP203 AUTOMATIC EXTINGUISHER PANEL INSTALLATION MANUAL • Page 37 of 45
Suggested actions :
1. Isolate the mains supply to the panel and remove the mains connector block
(CONN1) from the Power Supply PCB.
2. Position the mains connector block so that the live and neutral connections can
be probed. Taking all due precaution, re-apply the mains and measure the
voltage.
3. Isolate the mains supply again.
4. If the voltage reading was incorrect, re-check the mains supply.
If the voltage reading was correct, check if the mains supply fuse (F1) has
ruptured. If the F1 fuse is intact and the Hazardous Voltages Present red LED on
the Power Supply PCB is lit steady, then the PSU is faulty and should be replaced.
The mains supp ly fuse ( F1) has rup tu red
Sy m p tom s : The panel is running on batteries, but NOT on mains supply.
The LCD unit displays ‘Mains=FAIL’ and the Hazardous Voltages Present red LED on the
Power Supply PCB is NOT lit.
Suggested actions :
1. Isolate the mains supply to the panel.
2. Remove the Main Control PCB and check the mains supply fuse (F1) on the Power
Supply PCB for continuity.
3. If the F1 fuse has ruptured it will be due to an excessive mains surge, or a Power
Supply PCB fault. Check the components on the Power Supply PCB for signs of
damage. If no damage is found, replace the F1 fuse (supplied in the accessory
pack) with the correct type ensuring that the fuse clip is not damaged when re-
inserting the fuse.
4. Reconnect the mains supply. If the Hazardous Voltages Present red LED is NOT lit
then the Power Supply PCB is faulty and should be replaced.
The batte ry fu se ( F2) has rup tured
Sy m p tom s : The panel is running on mains, but NOT on batteries. The LCD unit displays
‘Batt=FAIL’.
Suggested action s :
1. Isolate the mains supply to the panel and disconnect the batteries.
2. Remove the Main Control PCB and check the battery fuse (F2) on the Power
Supply PCB for continuity.
3. If the F2 fuse has ruptured check the components on the Power Supply PCB and
Main Control PCB for signs of damage. If no damage is found replace the F2 fuse
with the correct type (supplied in the accessory pack), ensuring that the fuse clip
is not damaged when re-inserting the fuse.
4. Refit the Main Control PCB and reconnect the batteries.
5. If the Supply Present green LED is lit steady, reconnect the mains supply and
check that the power supply fault has cleared. If the Supply Present green LED is
NOT lit, either the Power Supply PCB, or the Main Control PCB is faulty and
should be replaced.
6. If the F2 fuse is intact, proceed to check the battery voltage (see below).
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