Domus SPR418 Manuale di installazione e istruzioni per l'uso - Pagina 14
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V E N T I L A T I O N
Maintenance
6.0
6.1
Routine maintenance
6.1.1 The two appliance G3 filters should be cleaned on a regular basis, the exact frequency will
be determined by individual living conditions.
6.1.2 The word 'FILTER' will appear on the home screen of the digital user-interface after the
set time has elapsed – when this occurs, clean the filters – see 5.1.4 for resetting details.
6.1.3
Before cleaning the filters, turn off the appliance at the isolator switch.
6.1.4 To remove the two filters, pull out the two caps from the front of the appliance and gently
slide out the filters in their carrier frames.
6.1.5 Lightly vacuum the filters to remove surface debris and then gently wash through in warm
soapy water. Ensure that the filters are completely dry before refitting. Important: do not
dry on a radiator or use excessive heat as this may distort the carrier frames.
7.0 Faults
7.1 Fault finding
Caution - the electrical supply to the unit and from any external triggers into the unit must
be isolated before removing covers to electrical connections.
Fault
Nothing displayed on the
controller LCD screen
'Unconnect' displayed on the
controller LCD screen
'Fail' displayed on the
controller LCD screen
LAB1306R, Issue 1, March 2018
LAB1199R, Issue 4, Apr 2017
Checks and possible solutions
• Check there is power connected to the unit.
Presence of an orange light visible from
outside the white wiring centre box will
indicate this.
• Check the electrical connections between
VCC (on controller) and 5V (on PCB)
• Check the electrical connections between
GND (on controller) and GND (on PCB)
• Check the electrical connections between TD
(on controller) and RXD (on PCB)
• Check the electrical connections between RX
(on controller) and TXD (on PCB)
• If relevant, check with the building
management services team if the external
inhibit function has been activated
• If connected, check the smoke detector isn't
activating the external inhibit function
• If no external inhibit control is connected,
check there is a link wire present between the
two terminals of the external inhibit connection
on the main PCB
• Check the electrical connections of the
aforementioned link wire between the two
terminals of the external inhibit on the main
PCB
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