Twinflex V3 Control Panel Engineering and Commissioning Manual
38
Fault Finding
Summary of Faults
Intermittent Zone Fault
1. Tighten the unused ‘zone screw terminals’ at the EOL device
2. Too many Hatari sounders on a zone. Remove some or adjust sound levels down.
3. EOL resistor has been fitted. Remove and use the correct dil switch on the device.
4. Interference from old or flickering fluorescent lights, low voltage transformers, or general
(less common). Ensure cable is screened and install a Ferrite core on the zone cables.
Ensure detector is away from light.
5. Dirty, or contaminated optical chambers (Mk3). Replace with a new optical chamber.
6. Weak EOL signal. Replace the EOL device.
7. Faulty auto-calibration of EOL signal. Replace the EOL device.
8. More than one EOL switched on
(panel LED flashing faster than buzzer). Remove the EOL
device to see if the system enter fault as normal. If the system stays clear then another device is
set to EOL and this must be found and switched off.
9. Earth fault. Ensure that all system earths are intact and not shorting to any other cables.
Permanent Zone Faults
1. More than one EOL switched on (panel LED flashing faster than buzzer). Remove the
EOL device to see if the system enter fault as normal. If the system stays clear then
another device is set to EOL and this must be found and switched off.
2. No EOL signal detected by panel (LED flashing at the same rate as buzzer). Switch the
EOL on at the last device.
3. O/C or S/C on zone cables. Remove the zone cable from the control panel and check
with an electrical test meter (not a high voltage insulation test).
4. Tighten the unused ‘zone screw terminals’ at the EOL device
5. Interference from old or flickering fluorescent lights, low voltage transformers, or general
(less common). Ensure cable is screened and install a Ferrite core on the zone cables.
Ensure detector is away from light.
6. Dirty or contaminated optical chambers (Mk3). Replace with a new optical chamber.
7. Output unit with no power or no link in fault input.
8. Faulty Zone at control panel (20-30 volts healthy, 1-20 volts faulty, 0 volts zone switched
off).
9. Weak EOL signal. Replace the EOL device.