Duomo BX444-Mc Manuale - Pagina 10

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In case of alarm

Extinguish any naked flames.

Do not switch lights or electrical devices on or off.

Open all windows and door to increase ventalation.

•

If the ALARM LED is off the levels of gas have dropped. A responsible, qualified person is now safe to find the cause of the alarm.

•

If the alarm sound reamins constant and the cause is not evident or not possible to eliminate turn off the emergency isolation valaves to the area and

contact your gas provider emergency line. They will advise accordingly.

Troubleshooting

The Problem

No light are illuminated on the fascia of the

detector

One or all of the sensor fault lights are

illuminated

Sensor fault continues to alarm

The detector is subject to repeated alarms

The detector is in main alarm condition and

the main gas valve is not closing

There is no supply to the solenoid valve

The sensor is connected but no LED is lit on

the front fascia

Still experiencing difficulties?

If you have made the checks above and are still experiencing diffculties then please call Duomo (UK) Ltd on

+441905 797989

for technical assistance.

t: 01905 797989

e: [email protected] | w: www.duomo.co.uk

Check that the electrical supply is reaching the device and that the plug in terminal rail is pushed

into place.

Check that the plug is inserted correctly.

Check that the sensor wiring is correctly terminated at both the detector and the sensor. Check that

12V DC is present at the sensor. The green LED on the sensor should be illuminated.

By pressing the TEST button on the detector fascia it is possible to check the efficiency of the

device and if the sensors have been connected correctly.

Check the sensor wiring. If the red Overload LED is illuminated then a short circuit or overload has

occured on the sensor or connecting cable.

Ensure that there is not an occasional gas leak. This may be due to a valve or joint which leaks

under pressure.

Check that the connections are correct and that power is supplied to the valve i.e. The valve is not

stuck in the open position. The function of the alarm relays both the Pre-Alarm and the Main Alarm

can be checked by pressing the TEST button on the detector fascia. Check that the main alarm

action is configured for a latching alarm.

(Switch 2 on 5th DIP switch - See Configuring the BX444Mc)

The Main Alarm relay is a volt free contact, therfore you must connect the live supply to the

common of the main alarm relay contacts terminal 10.

A supply will then come from terminal 12 to the solenoid valve.

Check that the DIP switch is set to the ON position for the sensor

(Switch 1 on one of the first three DIP switches - See Configuring the BX444Mc

The Solution