Vallox DIGIT2 SE Instructions For Use And Maintenance Manual
Also see for DIGIT2 SE VKL: Operating, maintenance and technical instructionsManualManual
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15TROUBLESHOOTINGVALLOX DIGIT2 SE© VALLOX • We reserve the right to make changes without prior notice.Outdoor air coming tothe dwelling is cold.SYMPTOM REASON DO THIS• Air cools down in the attic ducts.• The heat recovery cell is frozen, which iswhy extract air cannot heat outdoor air.• The post-heating radiator does not work.• The extract air filter or cell is clogged.• The initial adjustment of ventilation has notbeen done.1 • Check the insulation of the attic ducts.• If the heat recovery cell is frozen, check the setpoint forfreezing protection. The setpoint for freezing protection canbe raised by 1 or 2 °C, or the sensor can be bent closer tothe cell, in which case the supply air fan stops earlier (seethe instructions for using the control panel, Section 3.3.23).Thaw the cell before closing the door.• If the post-heating radiator does not operate, check to see ifoverheating protection prevents it from operating: pressbutton Q (figure on page 14) and measure the temperatureof supply air inside the unit when the door is closed. If theradiator does still not work, contact a maintenance compa-ny.• Check that the filters and the heat recovery cell are clean.• Check the functioning of the preheating radiator in the MLVmodel.Supply air fan keepsstopping.• The stopping of the supply air fan is active.NOTE! If you decrease the setpoint too much, thecell may freeze. Compare with list item 1.2 • The fan stops more rarely and the efficiency of the heatrecovery cell gets better when the setpoint is decreased by1 or 2 °C. (See the instructions for using the control panel,Section 3.3.23.)• Check the functioning of the preheating radiator in the MLVmodel.Supply air fan stops andstarts too frequently.• The difference between the stopping andstarting temperatures is too small.• The preheating radiator does not work.3 • Raise the difference between the stopping and starting tem-peratures by 1 or 2 °C. It extends the period between thestopping and starting of the supply air fan. (See the instruc-tions for using the control panel, Section 3.3.22.)• If the (electric) preheating radiator does not function, checkif overheating protection prevents it from operating: pressoverheat protection reset button Q (figure on page 14) andensure that the preheating radiator has been taken into use(see the instructions in Section 2.12. on page 7). If thesesteps do not help, contact a maintenance company.The maintenance remindersymbol ( ) is displayed andthe unit operates otherwisenormally.• The maintenance reminder lights up themaintenance reminder symbol in the maindisplay of the control panel at an intervalof approximately 4 months (factorysetting).• You may change the interval (see theinstructions for using the control panel,Section 3.3.21).4 • Check the cleanliness of the filters and the unit. If needed,clean or replace the filters. Also check the external grille.• Reset the maintenance reminder symbol to make itdisappear. (See the instructions for using the control panel,Section 3.3.10.)"Exh air sensor faulty"message is displayed andthe unit has stopped.• There is a fault in the freezing protectionsensor.5 • Contact a maintenance company. Sensor mounting needs tobe checked and the sensor has to be replaced if necessary."Sup. air sensor faulty"message is displayed and theunit has stopped.• There is a fault in the supply air sensor.6 • Contact a maintenance company. Sensor mounting needs tobe checked and the sensor has to be replaced if necessary."Inp. air sensor faulty"message is displayed and theunit is stopped.• There is a fault in the extract air sensor.7 • Contact a maintenance company. Sensor mounting needs tobe checked and the sensor has to be replaced if necessary."Out air sensor faulty"message is displayed and theunit has stopped.• There is a fault in the outdoor air sensor.8 • Contact a maintenance company. Sensor mounting needs tobe checked and the sensor has to be replaced if necessary. |
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