EPT076596 Issue 1 – March 2022
30
Thermal
Filter signal: High
OK signal: Low
If the DPX3500 system detects an internal temperature
greater than 55
o
C then it will automatically shut down the
extractor to prevent damage to components within the
extractor, and the above symbol will appear. Once the
internal temperature has dropped by 5
0
C the extraction unit
will be able to restart. To restart the extractor after an over
temperature alarm the unit reset button on the thermal trip
needs to be pressed (refer to section 5.05).
Hose blocked
Filter signal: Low
OK signal: Low
This alarm will become active when the DPX3500 system
detects a full blockage in the installation. The DPX3500
system interprets a full blockage as a vacuum spike within
the ductwork and is considered a full blocked as the
extractor cannot maintain the set airflow with the blockage
present.
During this time it is normal to hear the motor increase in
speed. The blockage will need to remain in the ductwork for
over 5 seconds before the alarm is given.
To remove the blockage, isolate the extraction unit from the
mains, remove the flexible hose, locate and remove the
blockage then reattach the hose as previously installed.
Main filter not fitted correctly
Filter signal: High
OK signal: Low
If the main filter has not been inserted correctly the symbol
above will be displayed. Once the main filter has been
inserted correctly the alarm will disappear. For main filter
replacement see section 6.02.
iQ2 board overheating
Filter signal: High
OK signal: Low
The iQ2 board is fitted with thermal protection to prevent
any of the components being damaged at high
temperatures. This is set to 60
o
C. Once the internal
temperature has dropped below 60
o
C the extraction unit
will be able to restart.
Device
Filter signal: High
OK signal: High
If there is VOC board failure, call your local Domino service
technician.
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