Service Manual - Buderus

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12 Trouble Shooting ProceduresThe HS2105 has built-in self diagnostics software which continually monitors sensor inputs to ensure thatmeasured values are within acceptable limits, monitors response of system components and signals descriptiveerror messages if these conditions are not met.Message (ERR) Meaning ActionBURNER Burner lock-out Check burner and press burner reset.BLR SENSR Defective FK sensor Check resistance of FK boiler sensor andverify with curve.OA SENSOR Defective outside air sensor Check resistance of OA sensor andverify with curve.DHW SENS Defective DHW sensor Check resistance of FB sensor andverify with curve.MIX SENSR De f e c t i ve mixed circuit sensor (FV) Check resistance of FV sensor and verifywith curve .Check sensor placement and wiring.R E M OT E1 / 2 No n - Responding Room Se n s o r s Check wiring to room sensor (wire 1 to 1, wire 2 to2). If lights on room sensor blink, check HKdial internal on room sensor. Check if roomsensor is activated on HS2105HEATING Heating system stays cold. Turn control OFF/ON.Continued pump logic operation. Check boiler operation.Check manual high limit reset.DHW DHW stays cold for 2 hours. Check tank pump operation and system piping.These messages are very helpful in troubleshooting the HS2105. The control continues burner and circulatoroperation in case of sensor failure to prevent possible freeze-up of the heating system.36
Parameter Settings at the Installation Level 13Record your specific settings at the installation level on this page for future reference. Observe that not allentries listed may actually be accessible as it depends on the modules inserted in the HS2105 and the valueof certain parameters.Parameter Range Factory Setting Actual SettingLanguageDeutschReference Temperature PERIM-HTG 86˚F - 194˚F 167˚FReference Temperature FLOOR-HTG* 86˚F - 140˚F 113˚FFreeze Protection 0˚F - 50˚F 34˚FRoom Sensor OFF / ON OFFRoom Compensation OFF / 1 - 18˚F 5˚FNight Setback Modes Outside Setback OASETBACKSetbackRoom SetbackBoiler OffMaximum Circuit 1 Temperature 158 - 210˚F 176˚FMaximum Circuit 2 Temperature* 68 - 140˚F 122˚F for FLOOR-HTG68 - 194˚F 194˚F for PERIM-HTGFlue Gas Temperature** OFF/120˚F - 480˚F OFFOffset : Vertical Shift of Heating Curve -9˚F - 9˚F 0˚FHeating Circuit 1 NO SYSTEM/PERIM-HTG PERIM-HTGHeating Circuit 2* NO SYSTEM/PERIM-HTG FLOOR-HTGFLOOR-HTGDHW Production ON/OFF ONDHW recirculation Pump OFF/1/2/3/4/6/ON 2Burner System*** 1 stage/2 stage /modulating ONE-STAGEModulation Range*** 10% - 60% 30%Modulating Valve Operating Time*** 5 sec. - 60 sec. 12 sec.Pumplogic (Condensate Protection) 59˚F - 140˚F 104˚FBuilding Response 1/2/3 2DHW Prior ON/OFF ON*Requires Mixing Module FM 241**Requires Communications Module KM 271***Requires Burner Module FM 24237
Page 1 and 2: 5647 488 5/98 USAService ManualEcom
Page 3 and 4: Introduction 1Brief Description of
Page 5 and 6: Mounting Instructions 2• Remove t
Page 7 and 8: Testing the Manual Reset High Limit
Page 10 and 11: 5 Program OverviewListing of Entrie
Page 12 and 13: 6 Installation EntriesBuilding Type
Page 14 and 15: 6 Installation EntriesMinimum Fi ri
Page 16 and 17: 6 Installation EntriesCondensate Pr
Page 18 and 19: 6 Installation EntriesFlue Gas Temp
Page 20 and 21: 6 Installation EntriesHeating Curve
Page 22 and 23: 6 Installation EntriesVertical Shif
Page 24 and 25: 6 Installation EntriesMaximum Heati
Page 26 and 27: 6 Installation EntriesAdjusting the
Page 28 and 29: 6 Installation EntriesTo Change the
Page 30 and 31: 6 Installation EntriesDHW Recircula
Page 32 and 33: 8 Testing of RelaysTesting of All R
Page 34 and 35: 10 Total System ResetRESETAn overal
Page 38 and 39: 14 Sensor Curves (General)Switch th
Page 40 and 41: 4015 Wiring Diagrams
Page 46: 4615 Wiring Diagrams

Service Manual - Buderus

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