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ZONESENSE EN54
INSTALLATION COMMISSIONING & OPERATION
12
Trouble Shooting
If a Fault occurs on a critical part of the System, the Panel responds by activating its internal Buzzer
and illuminating the common FAULT light and any other fault light(s) relating to the fault. The Panel's
Fault Output will also activate (provided it has not been Disabled).
Possible faults indicated at the Panel are highlighted below.
Unless otherwise stated, repairing any particular fault condition will automatically clear the fault from
the Panel. If the Panel is RESET while a fault still exists a fault will still be indicated.
Note:
It is possible to mute the Panel's BUZZER at any time by momentarily pressing the
SILENCE BUZZER button.
GENERAL
Fault
The Common FAULT LED is illuminated (amber) when there is a fault on any part of the Fire Alarm
System. It is always lit in tandem with at least one other fault LED which conveys more precise
information on the type of fault detected.
Zone Fault
All of the Panel's Zone circuits are monitored for open and short circuit faults and detector head
removal if diodes have been installed. (unless there is an Alarm condition or the Zone is in test or
disabled). All faults are indicated by the relevant ZONE FAULT indicator pulsing amber.
FAULT STATUS
Power
The POWER ON LED should be illuminated at all times. If the mains supply fails the LED will flash,
see Power Supply Faults for further information.
Power Supply Fault
The POWER FAULT LED is illuminated (amber), the Common FAULT LED is illuminated (amber)
and the POWER LED (green) flashes when one or more of the following has occurred:
The Mains supply is too low or has failed completely.
Symptoms:
The panel runs on batteries but not on Mains
Suggested Action:
Measure for 240 / 28VAC on the primary / secondary sides of the transformer
and the 28VAC on the Main Control Board.
Carefully disconnect the batteries and measure the 27V output of the Power Supply
The Mains fuse has ruptured.
Symptoms:
The Panel runs on batteries but not on Mains
Suggested Action:
(a)
Isolate the Mains supply, and check the PSU's Primary Mains fuse for continuity.
(b)
If the Fuse is ruptured it will be due to excessive Mains surge or a PSU fault. Check the
components on the PSU for damage. If none is found replace the fuse with the correct type and
reconnect the Mains supply.
The Battery supply voltage is too low.
Symptoms:
the Panel runs on Mains but will not run on batteries. If the Mains supply has failed and
the battery supply has been discharged to the point where the voltage is too low (i.e. less than 21V),
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.
If the Mains supply has not failed, but the total battery voltage is less than 21V, 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
