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Service manual

1. S De LESS Figure 6 1 The schematic structure is shown in Figure 6 2 A V A V mmm Primary hydraulic circuit Domestic hot water circuit Figure 6 2 6 2 Removal Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent Remove the panels of the case Empty the primary circuit and the d h w circuit of the boiler 3 Remove the control panel following the instructions from 4 in section 2 3 4 Remove main electronic p c b box following the instructions from 5 in section 2 4 5 Remove the pump following the instructions in section 7 3 6 Completely unscrew the Allen key screws B in Figure 6 3 which hold the exchanger to the plastic groups Figure 6 3 7 Move the exchanger towards the rear of the boiler and extract it to the left Reassemble the d h w heat exchanger carrying out the removal operations in the reverse order Cr Warning to lubricate the O ring gaskets exclusive ly use a silicone base grease compatible to be in contact with foods and approved by the local water Authorities to put the off center location securing pin indicated f Warning When reassembling the exchanger be sure in Figure 6 4 towards the left side of the boiler Figure 6 4
2. Pump speed A 02 A Self regulat Zone valve setting P 04 00 No factory set Room Thermostat 01 Z1 with R T Z2 Remote Control with R C Max c h flow temperature Figure 9 11 02 Z1 with R T Z2 with R C Min c h 7 Repeatthe previous steps in order to display the parameter s flow temperature setting or to switch to the following Gas type P 05 00 G20 Natural 01 G25 B 02 03 eo coo son 04 G30 Butane 05 G31 Propane Not used P 06 C h flow max P 07 85 45 factory set 85 C o R J o temperature C Factory parameters P 08 00 No reset Figure 9 42 reset 04 All parameters return to factory set To reset the boiler to the normal operation press the key B Figure with the exclusion of 9 5 for 10 second or turn off the electricity supply to the boiler P 01 and P 05 39 All parameters return to factory set included Pr 01 and Pr 05 24 PARAMETER Chimney sweep function MAIN ELECTRONIC CONTROL IGNITION P C B LCD VALUES SET 00 No chimney sweep fun factory set 01 D h w low power sweep test 02 C h low power sweep test 03 C h max power sweep test 04 D h w max power sweep test C h reignition frequency C h pump post circu lation 00 99 0 600 sec factory set 30 3 minutes 00 99 0 600 sec factory set 10 1 minute
3. Figure 9 4 2225 MAIN ELECTRONIC CONTROL IGNITION P C B Normally the result of the comparison between these two signals directly operates the fan speed adjusting the useful output gene rated in order to stabilize the temperature of the exiting water If during the d h w mode operation the temperature of the pri mary circuit goes over 90 C the useful output is automatically reduced so that the primary circuit cannot reach excessive tem peratures The control sequences in function E and 3 in function are illustrated in detail in sections 9 7 and 9 8 9 4 Setting the boiler control function modes It is possible to select the various boiler control function modes hereafter named parameters by using the keys of the control panel p c b Figure 9 5 1 Toenter in the parameters setting mode press contemporary the 3 keys A B C Figure 9 5 for 10 seconds at the same time until P01 are displayed on the display indicating the en try in the parameter 01 and the value of parameter Figure 9 5 Figure 9 6 Figure 9 6 2 To change the parameters press c h set keys D or E Figure 9 7 see also Tab 9 1 Figure 9 7 3 To memorize the setting press t
4. LG Figure 5 1 By reducing the combustion products temperature the latent heat of the vapour is transferred to the water circuit allowing an extra gain of useful heat The condensed vapour is then drained through the condensate trap B and the draining pipe C 5 2 Removal Warning isolate the boiler from the mains electricity A supply before removing any covering or component Disconnect the flue system from the boiler 2 Remove the fan group rubber pipe gas pipe following the instructions from 1 to 6 in section Removal of the Air box and the Fan page 44 3 Disconnect the detection electrode connector D the ignition electrodes connector E and the earth wire F 4 Disconnect the fan connector G by pressing the plastic hook placed on the side of the connector Figure 5 2 Unscrew the nuts H Figure 5 2 Remove the fan burner group I Empty the primary circuit of the boiler Remove the clips J Figure 5 2 Loosen the connection K and slightly move the pipe L up wards turn it towards left Figure 5 2 and then move the pipe downwards freeing it from the Condensing heat exchanger OD o Y O Oi Figure 5 2 10 Loosen the connection M and slightly move the pipe N up wards turn it towards left Figure 5 2 and then move the pipe downwards freeing it from the Condensing heat exchanger Figure 5 3
5. gt a L ep D LJ M o o o gt a a ssp gt vY gt jl inm ES o ES Supply network Fan Main circuit Safety thermostat pressure switch Figure 3 3 10 FAULT FINDING 4 FAULT FINDING p p a ETE rp er Egg p DNE teal eas E ee PE ressa 1 111 ome duren ejo eve pp o JO O11IS9J Sec N meussmes e sexeewemo e lel eo sess E FE TE DL ii pasadores e ELLE pers ias le p ty soda e m p pj ttt 11111 N dl 1096 09080 0008100080 00810 l Ed a EE p E SALA SED asamedi was PPP O o Xx o lt o 9 2 o E c c o o E 9 o wweeewn e fel iu ses Tt I eme eme 11 0 wal je ie SAA T lo pe uespxersay sususpico e lel e HHH I o wev TTT TET T e x sewau evo le e ej eel Tt Jefe S cA JIS Ef _ew amp amawa LL L L 1no 90 eoueiddy 43 Sejeoipur ejdsiq Section of the manual note ref in brackets FAULT FINDING ui lessa9au y uBiu 00 aye mo JO yBiy oo aunssaud myp y 0 Jajay J SS A uoisuedxe ay jo uonezuns
6. 44 Al FUNCION criada ala D Qa epi aa 44 17 2 Removal of the Air box and the Fan 44 18 IGNITION DETECTION ELECTRODES AND BURNER 45 18 1 EUNCION v a aaa bd e ls hebr 45 18 2 Removal of the Ignition and detection electrodes 45 18 3 Removal of the burner 45 18 4 Removal of the front insulation panel 46 18 5 Removal of the rear insulation 46 18 6 Checks aee o edie gba a ace 46 19 SAFETY THERMOSTAT 48 19 4 FUNCION 2i ii Sate Peete E DRE anaes 48 192 Ghecks ii 1 oe a PE Os nan q RR Gre Ge es 48 19 3 Removal us aa eyo as ea 48 20 FLUE TEMPERATURE PROBE NTC AND SAFETY THER MAL FUSE Rm a aaa 49 20 1 FUNCHONG uy aia RES aX EF ie ann 49 20 2 REMOVAL i sexe u s toe kq ada ia aoe coe nens 49 20 3 CheCckS 2 os te bbe ete dhe adi 49 21 CONDENSATE TRAP 51 211 FUNCION eieaa ida de ud 51 21 2 Check the cleanness of the trap 51 21 3 Removal setsi isaac 51 22 SHORT SPARE PARTS LIST 52 OVERALL INFORMATION 1 OVERALL INFORMATION 1 1 Overall View Flue temperature probe NTC e Condensing heat exchanger Safety thermostat Expa n sion Ighition vesse electrodes Detection A IN electrode Pipe silencer Burner Fan A
7. 16 PUMP 7 PUMP 7 1 Function The pump A in Figure 7 1 and Figure 7 3 has the function of ma king the water in the main circuit circulate through the main con densing heat exchanger and therefore through the c h system during the c h function or through the secondary heat exchan ger during the d h w function Figure 7 1 7 2 Checks Warning isolate the boiler from the mains electricity A supply before removing any covering or component V Check that the pump is not seized and that the movement of the rotor is not subject to mechanical impediments With the boiler off remove the front panel Remove the air relea se plug of the pump and turn the rotor with a screwdriver Check the electrical continuity With the boiler off remove the front panel and disconnect the connector B Figure 7 3 Measure the electrical resistance between the pump supply con nections Figure 7 2 Electrical resistance of the windings at ambient temperature must be RESISTANCE Y Check the absence of starting defects With the boiler off remove the front case panel Remove the air release plug from the pump Start the boiler and with a screwdriver turn the rotor in the direction of the
8. Gas valve adjustment The person carrying out a combustion measurement AN should have been assessed as competent in the use of a flue gas analyser and the interpretation of the re sults The flue gas analyser used should be one mee ting the requirements of BS7927 or BS EN50379 3 and be calibrated in accordance with the analyser manu facturers requirements and have a current calibration certificate 11 Fit the probe of the flue analyser in the flue exhaust sampling point located on the exhaust pipes of the boiler Figure 11 4 flue exhaust sampling point air intake sampling point Figure 11 4 EUM GAS VALVE 12 Turn on the boiler switching on the fused spur isolation switch 13 Open the gas inlet valve 14 Turn on the boiler and operate for 2 minuets to pre heat the flue before commencing any adjustments Figure 11 5 15 To enter in the parameters setting mode press contemporary the 3 keys G H I Figure 11 5 for 10 second until the dis play shows Figure 11 6 Figure 11 6 Checking the minimum gas valve setting in domestic hot water mode 16 Press keys G and H Figure 11 5 at the same time until the display shows the letters LP that alternate with the heating water temperature value e g 45 indicating the activation of the chimney sweep function at minimum output Figure 11 7 Figure 11 7
9. 31 11 GAS VALVE uuu Rok RR e dea 33 11 4 FUNCION ori ira Rt RR kata eee 33 11 2 Description of the parts Figure 11 2 33 11 3 Adjustment iia sss sala suyuta kusam sa an 33 14 4 Checks caida emnt t bo RT ena eret n 35 11 5 Removal of the gas valve 36 12 PRIMARY CIRCUIT FLOW SWITCH 37 124 FUNCION a irse a ena 37 12 2 Checks eR eb anar 37 12 3 Removal 2 235 ord ge coded EP RR 37 13 EXPANSION VESSEL AND PRESSURE GAUGE 38 ASA FEUnOLO udo eto oro ed e qure qaa bin atta 38 19 2 OIOCKS aic iii 38 13 3 Removal of the expansion vessel 38 14 D H W FLOW SWITCH FILTER AND FLOW LIMITER 39 144 FUNCOM sss siasa usupa boone decd eee 39 14 2 Description and location of parts Figure 14 2 39 143 Removal of the sensor 39 TAA CHECKS u a th meer aya bays BE e qu RE Gon ie E 39 14 5 Removal of the flow switch group and d h w circuit filter 40 14 6 Flow limiter tocara da te TI eda aed 40 15 TEMPERATURE PROBE ss 41 15 4 f nctlOon vota de geet eee 41 A A paq cians Ase O 41 15 3 Removal of the c h Temperature probes 41 15 4 Removal of the d h w Temperature probes 42 16 BY PASS VALVE 43 16 EUNCION baaa ia ont ic then Te ois 43 16 2 Removal viciado aa huyu 43 17 FAN AND AIR BOX
10. Figure 20 4 50 CONDENSATE TRAP 21 CONDENSATE TRAP 21 1 Function The condensate trap A in Figure 21 1 and Figure 21 2 allows the discharge of the condensate via the condensate drain pipe avoiding in the mean time the escape of combustion products A plastic ball closes the trap outlet in case that the trap is empty Figure 21 1 If the drain pipe becomes blocked or condensate cannot drain the condensate level it the trap rises until it reaches the screw attached to the flame detection electrode this will cause the boiler lock out 21 2Check the cleanness of the trap Unscrew the plug B on the bottom of the trap A and remove dirt eventually deposit Figure 21 2 21 3Removal Warning isolate the boiler from the mains electrici AN ty supply before removing any covering or compo nent Remove the front and right case panels 2 Unscrew the threaded locking ring B and remove the flexible pipe C Figure 21 2 3 Using pliers remove the spring D moving it upwards 4 Unscrew the screw E and remove the trap A from the pipe F 5 Reassemble carrying out the removal operations in reverse order 51 SHORT SPARE PARTS LIST 22 SHORT SPARE PARTS LIST Key G C part no Description Q ty e Hia iine P 1 Burner mod Activ A Plus 25S Act
11. starts ignition discharges Opens gas valve flame presence beginning of ignition period interrupts ignition discharges gas valve open fan runs closes gas valve YES stops fan interrupts ignition discharges memorizes lock display show lock out End of ignition period r NO si reset key s fan rpm NO pressed YES Safety thermostat or flue f 2 NO NO temperature probe lock out YES icc X YES Figure 9 15 28 CONTROL PANEL ELECTRONIC P C B 10 CONTROL PANEL ELECTRONIC P C B 10 1 Function m Figure 10 1 C h temperature increase key C h temperature reduce key Reset Stand by Winter Summer key D h w temperature reduce key D h w temperature increase key Display 3 star preheating function key Reset Key Access to function menu key Clock key used to access the clock functions Time Day Date setting and the timer 3 star preheating function and heating flow timer cC I rommoou p The Control panel electronic p c b can give to the service 3 le vels of informations Normally information Info modality Function modes setting modality 10 2 Normaly information TaT Indicate the status of the scheduling re quest Flashing comfort program in process t reduced program in process 1234567
12. 17 Allow the analyser to give a stable reading 18 Read the CO value It should be between Type gas CO value range Natural G20 8 7 9 3 Propane G31 9 4 10 4 Natural G20 Propane G31 Activ A Plus 30C Activ A Plus 35C Activ A Plus 16S Activ A Plus 25S To adjust the CO value remove the brass plug by unscrewing it and rotate the Allen key screw 4mm C Figure 11 2 by rotating it clockwise the CO increases Checking the minimum gas valve setting in heating mode 19 Press key G to vary the output in chimney sweep mode when the display shows the letters hP that alternate with the heat ing water temperature value e g 32 the chimney sweep function is at minimum power during heating Figure 11 9 Figure 11 8 20 Allow the analyser to give a stable reading 21 Read the CO value It should be between Type gas Natural G20 Propane G31 Natural G20 Propane G31 CO value range Activ A Plus 30C Activ A Plus 35C Activ A Plus 16S Activ A Plus 25S To adjust the CO value remove the brass plug by unscrewing it and rotate the Allen key screw 4mm C Figure 11 2 by rotating it clockwise the CO 96 increases Checking the maximum gas valve setting in heating mode 22 Press key G to vary the output in chimney sweep mode when the display shows the letters cP that alternate with the heat ing water temperature value e g 78 the
13. Max useful output in c h mode 00 99 0 100906 factory set according to P 01 C h pump working type 00 Depends on room thermostat factory set 04 Always running Ignition power 00 99 0710096 factory set Natural gas G20 20 Activ A Plus 25C 31 Activ A Plus 30C 25 Activ A Plus 35C 30 Activ A Plus 16S 37 Activ A Plus 25S Ignition power LPG Propane G31 26 Activ A Plus 25C 37 Activ A Plus 30C 31 Activ A Plus 35C 36 Activ A Plus 16S 43 Activ A Plus 25S K value external probe diagram 00 Off factory set 01 0 1 60 6 0 K value Min useful output c h 00 99 096100 factory set 00 0 D h w burner turn off function 00 Burner off at fixed d h w 65 C factory set 01 Burner off at set point 5 C NTC on the c h return 00 Probe not present 01 Probe present Not used Not used Not used Not used Not used Not used Not used Not used C h minimum setpoint 25 45 factory set 25 C Maintenance intervals 00 48 months factory set 12 months PARAMETER Presence of domestic cold water temp probe or set of inlet cold water with solar control VALUES SET 00 No NTC probe 01 Yes NTC probe 04 45 C temp NTC inlet probe with solar control Correct pressure c h system Tab 9 1 05 0 5 bar 15 1 5 bar f
14. Other components like the primary circuit pressure switch can temporarily stop the ignition of the burner but allow its ignition when the cause of the intervention has stopped Figure 9 14 and Figure 9 15 show the sequence of the opera tions that are carried out at the start of every ignition cycle and during normal functioning 9 2 Selection and adjustment devices On the Main electronic control ignition p c b several selection adjustment and protection devices are located Figure 9 2 Some of these devices are directly accessible by the user fun ction control temperature adjustment etc others like the fuses are accessible by removing the main electronic p c b lid 24 MAIN ELECTRONIC CONTROL IGNITION P C B Connector ignition electrode Connector flame detection electrode 1 2 3 Connector controler fan 4 Connector flue temperature probe NTC 5 Connector d h w temperature probe NTC d h w flow switch and external temperature probe optional 6 Connector Primary circuit pressure switch 7 Connector safety thermostat and c h temperature probe NTC 8 Connector remote control optional 9 Connector display and function control c h d h w tem perature adjustment control panel p c b 10 Fuse F1 F22AF 11 Connector electric supply Main electronic control ignition p c b 12 Connector 3way diverter valve 13 Connector electric supply control panel p c b 14 Connector gas
15. 11 Using pliers remove the spring O moving it downwards and disconnect the rubber pipe P Figure 5 3 14 CONDENSING HEAT EXCHANGER 12 Unscrew the screws Q and remove the clamps Figure 5 3 13 Disconnect the two connectors R by pressing the plastic hook placed on the side of the connector Figure 5 3 14 Remove the Condensing heat exchanger by levering it and sliding it forwards 15 Reassemble the Condensing heat exchanger carrying out the removal operations in reverse order Ensure to tighten the nuts H Figure 5 2 firmly 5 3 Cleaning If there are deposits of dirt on the coil of the Condensing heat exchanger clean with a bristle paintbrush and remove the dust with a hoover Warning After cleaning or replacement as detailed A above if it deemed necessary to undertake a com bustion analysis as detailed in chapter 11 3 section 11 Figure 5 4 Caution After any periodical servicing or disturbance the combustion chamber silicon seal S Figure 5 4 must be fully inspected and replaced at the discretion of the service engineer After any disturbance to the chamber door seal the appliance must undergo a full analytical combustion performance check D H W HEAT EXCHANGER 6 D H W HEAT EXCHANGER 6 1 Function The d h w heat exchanger A in Figure 6 1 and Figure 6 3 allows the instantaneous transfer of heat from the primary hydraulic cir cuit to the water destined for d h w use
16. Constantly illuminated the presence of this symbol during normal operation indi cates that the heating or preheating timer AM PM has been set Flashing this indicates that the clock has not yet been set by the user ct The back lighting has to be flashing K Constantly illuminated set value Al Constantly illuminated temperature is di I4 r1 splayed without decimals but with a sign t Lt probe connected bar psi m r1 Indicated boiler pressure Lr X Constantly illuminated boiler power dela yed by inhibitor AFCT or other events Constantly illuminated remote control connected Flashing request from remote control in process INFO menu input enabled Constantly illuminated pump active The icon remains on for post circulation 29 CONTROL PANEL ELECTRONIC P C B xE Constantly illuminated boiler antifreeze active FUNCTION AF aK Antifrostat Constantly illuminated system antifree ze active SIGNAL DISPLAYED BY THE LCD LCD FUNCTION E01 RESET Lack of burner ignition on safety lockout E02 RESET _ Safety thermostat intervention lockout E03 RESET General lockout E04 x E05 x Little pressure in the system or pressure transducer disconnected Pressure switch anomaly if present In the case of incorrect pressure the value is visualised with a flashing symbol When pressure is achieved the symbol re mains on for 1
17. panel and remove it Figure 2 2 bottom view of the boiler Pull the lower part of the front panel and lift it upwards Figure 2 3 Figure 2 3 To remove the side panels loosen the screws B Figure 2 2 and C Figure 2 3 Pull the side panels towards the outside To Fit the case panels Fit the side case panels Warning Fit the front panel hooking it on the upper A side Push the spring towards the internal side of the boiler and simul taneously push the front case panel until it is completely hold in place Figure 2 4 step 1 2 Repeat the same operation on the opposite side of the front pa nel Figure 2 4 step 3 4 Ensure that the front panel edge is close fitting to the side panels Lock in place the panel with the appropriate screws Figure 2 4 GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS 2 3 Control panel Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent To gain access to the parts located inside the control panel pro ceed as follows 1 Remove the front panel of the case 2 Unscrew the screws D and E Figure 2 5 3 Free the hooks indicated and rotate the lid towards left Figure 2 5 4 To access to the parts located behind the control panel turn it as shown in Figure 2 6 2 4 Main electronic p c b box Warning isolate the boiler from the mains electrici A ty supply before removing any c
18. B Figure 17 3 Figure 17 3 12 Assemble the Fan and the Air box carrying out the removal operations in reverse sequence Before reassembling ensure the fan gasket Figure 17 2 is correctly mounted Warning Be careful not to damage the OR gasket of A the gas pipe when inserting the pipe in the air box air gas mixer After any service operation on the components of the gas circuit check all the connections for gas leaks Warning After cleaning or replacement as detailed A above it is deemed necessary to undertake a com bustion analysis as detailed in section 11 3 44 IGNITION AND DETECTION ELECTRODES 18 IGNITION DETECTION ELECTRODES AND BURNER 18 1 Function Three electrodes are fitted on the fan burner group Two of them fitted on the right side of the fan burner group A are the ignition electrodes B On the left side is the detection electrode C and it detects the presence of the flame Figure 18 1 The burner J is fitted on the rear of the fan burner group A Figure 18 2 18 2 Removal of the Ignition and detection elec trodes ty supply before removing any covering or compo Warning isolate the boiler from the mains electrici nent 1 Remove all the case panels see section 2 2 Disconnect the ignition electrodes connector D and the earth wire E Figure 18 1 and disconnect the detection electrode connect
19. Plus 30C Activ A Plus 35C Three way Gas valve Fan diverter valve Flame detection Ignition electrode bn brown bu blue bk black wh white rd red gy grey Figure 3 1 electrodes J f rd Ld x WIC EH wn our bu SS gn green ye yellow vt violet og orange gnye green yellow rdwh red white JJ b Safety N thermostat C h temperature probe NTC return Flue temp probe NTC Safety thermal fuse D h w outlet temperature probe NTC D h w flow switch Primary circuit pressure switch C h temperature probe NTC flow D h w inlet temperature probe NTC O O O O CAD g he O oj Mo 8 DIAGRAMS 3 2 Wiring diagram Activ A Plus 16S Activ A Plus 25S Gas valve Fan Three way diverter valve Flame detection Ignition electrode electrodes bn brown bu blue bk black wh white rd
20. The day of the week is displayed hi ghlighting the number with the following sequence 1 Mon 7 Sun Constantly illuminated d h w function enabled Flashing d h w function enabled vig 0 ailt lll Flashing solar circuit pump in operation Solar integration at the time of d h w withdrawal is indicated by the lighting of the bars SV versions the bars indicate the value of the temperature of the solar storage range 40 80 C Constantly illuminated heating request from zone 1 and or zone 2 Flashing heating function in progress MU il Constantly illuminated delivery probe and or return probe The ignition of the key the arrow M and the month 1 or 2 indicates the next due date for maintenance The flashing of the symbol the arrow M and 0 indicates that the maintenance pe riod has expired Temperature measurement unit Constantly illuminated 3 star preheating function active Flashing 3 star preheating function in process Flashing down before flame detection Constantly illuminated flame present and modulation level Constantly illuminated lockout error The boiler can be restarted by the user by pressing the reset button All symbols represented with lines that surround them indicate that the symbol is flashing KEY uw BIS Non resettable error _ Constantly illuminated chimney sweep P d function enabled
21. chapter before to remove this part 1 Remove the Ignition and detection electrodes see section Removal of the Ignition and detection electrodes page 45 2 Remove the burner see section Removal of the burner page 45 3 Remove the front insulation panel Figure 18 5 Assemble the new front insulation carrying out the removal operation in reverse order When fitting the new panel ensure that the electrodes holes coincide with the holes of the com bustion chamber 0 front insulation Siliconic gasket Figure 18 5 Caution After any periodical servicing or disturbance the combustion chamber silicon seal Figure 18 5 must be fully inspected and replaced at the discretion of the service engineer After any disturbance to the chamber door seal the appliance must undergo a full analytical combustion performance check 18 5 Removal of the rear insulation See warning note at the end of this chapter before to remove this part Attention Cover the inner of the condensing heat A exchanger to avoid that dirt and debris fall in the coil 1 Dothe operations of section Removal of the burner page 45 from step 1 to step 3 2 Unscrew the screw K remove the washer L and the rear in sulation M Figure 18 6 Figure 18 6 18 6 Checks 1 Check of the spark generator Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent There is not a significa
22. frequency must be 0 32Hz With flow rate the electrical frequency must be 33 200Hz 39 D H W FLOW SWITCH FILTER AND FLOW LIMITER 14 5Removal of the flow switch group and d h w circuit filter ty supply before removing any covering or compo Warning isolate the boiler from the mains electrici nent 1 Remove the front panel of the case and empty the d h w circuit 2 Remove the fork D and pull up the flow switch plug E Figure 14 3 with the help of a screwdriver 3 To remove the body 4 with the filter from the flow switch group rotate the flow switch plug 1 Figure 14 5 4 Reassemble the parts following the removing sequence in reverse order 14 6 Flow limiter The Activ A 25C model is factory fitted with a 10 litres min flow limiter white To install the flow limiter 1 Remove the flow switch group as explained in the section 14 5 2 Rotate the flow switch plug 1 to separate it from the body 4 Figure 14 5 rotate Z lt NE 1 o Figure 14 5 3 Insert the flow limiter 3 as shown in Figure 14 5 4 Reassemble the group following the above sequence in re verse order 40 TEMPERATURE PROBE 15 TEMPERATURE PROBE 15 1 Function The Temperature probe has the function of converting the tempe rature of the water in the hydraulic circuit where it is installed into an electrical signal resistance The relation between temperature and electrical resistanc
23. red gy grey Figure 3 2 unn J U gn green ye yellow vt violet og orange gnye green yellow rdwh red white bk bk Pov 0 iw OUT S X wh C h temperature probe NTC return Flue temp probe NTC thermal fuse Primary circuit pressure switch C h temperature probe NTC flow Safety thermostat O LLLI DIAGRAMS 3 3 Circuit voltages during c h or d h w operation Electrical voltages with burner on C J ony during c h operation emm only during d h w operation 3 way diverter valve D h w Gas valve Flow switch 230 33 200 Hz 230 0 aues ie Li
24. valve pump and fan 9 3 Checking the temperature The Main electronic control ignition p c b makes it possible to separately adjust the c h water flow temperature and d h w outlet temperature The temperature of the water is converted into an electric signal by means of temperature probes The user setting the desired temperature with the control panel p c b key A PY or AWV If the power requested is lower than 4096 of the maximum power output then control is achieved by switching ON the burner at minimum power then switching OFF ON OFF function If the power requested is higher then the burner is switched ON at maximum power and will control by modulating to 4096 of the maximum power output During the c h operation Figure 9 3 the signal coming from the c h temperature probe is compared to the signal given by the control panel through the adjustment made by the user key AM The result of such a comparison operates the fan speed thus regulating the gas flow rate and consequently chan ging the useful output of the boiler t E lt 77A Q5 a Be ee ii III Y Figure 9 3 When the boiler functions in d h w Figure 9 4 the signal co ming from the d h w temperature probe is compared with the signal given by the control panel through the adjustment made by the user key A P
25. 5 s and then disappears Flashing a high pressure gt 2 8 bar ON 2 6 bar OFF Q intermediate pressure 0 15 lt P lt Pon rising 0 15 lt P lt Pon 0 2 decreasing pressure critical 0 00 P 0 15 bar E06 x Faulty c h temp probe NTC1 or NTC2 E07 xV Faulty d h w temp probe NTC Pump activated for the post circulation pha se Po flashing temperature flashing Boiler in anti freeze phase bP flashing temperature flashing E08 P d Faulty external temp probe NTC with K set E09 x Faulty flue temp probe NTC if present Boiler on demand for d h w power The d h w temperature is displayed E10 RESET Flue probe intervention lockout if present E11 RESET E12 Flame detection error Failure return NTC probe Boiler requesting heating power and remote control connected E13 DT delivery return gt 40K if foreseen Set c h all other symbols are disabled Faulty pump or primary temperature above Set D h w all other symbols are disabled Delayed burner ignition for setting the sy stem the hourglass symbol turns on E14 RESET 105 C Absence of flow from temperature gradient E14 gt 2K s E20 RESET Lockout EVG E21 RESET Lockout EVG E22 RESET Lockout EVG E23 RESET Lockout EVG E24 RESET Abnormal combustion ignition lock E25 RESET Abnormal combustion operation l
26. E GAUGE 13 EXPANSION VESSEL AND PRESSURE GAUGE 13 1 Function The Expansion vessel Ain Figure 13 1 function is to allow for the volume expansion of the c h circuit water due to the temperature rise Figure 13 1 13 2Checks 1 sani Figure 13 2 Turn off the flow and return isolation valves and empty the primary circuit of the boiler Remove the protective cap B in Figure 13 2 from the valve on the top of the expansion vessel and connect a suitable air pressure gauge 3 Check the pre load pressure and refer to the section Expan sion vessel in the User manual and installation instructions for the correct value 13 3 Removal of the expansion vessel ty supply before removing any covering or compo nent Warning isolate the boiler from the mains electrici Remove the front and right hand side panels of the case turn off the flow and return isolation valves and empty the primary circuit Completely unscrew the connection C the locknut D Figure 13 3 Unscrew the screws E and remove the bracket F Figure 13 3 Remove the expansion vessel from the front of the boiler Re assemble the parts in reverse order of removal Figure 13 3 38 D H W FLOW SWITCH FILTER AND FLOW LIMITER 14 D H W FLOW SWITCH FILTER AND FLOW LIMITER 14 1 Function The d h w flow swi
27. ONTROL IGNITION P C B 9 MAIN ELECTRONIC CONTROL IGNITION P C B 9 1 Function Inlet Information On the Main electronic control ignition p C b Function control C h temperature adjustment D h w temperature adjustment Boiler reset button printed circuit board p c b From other boiler devices C h temperature probe NTC D h w temperature probe NTC D h w flow switch Primary circuit pressure switch Flue temperature probe NTC Safety thermostat Flame detection electrode Room thermostat if fitted Time switch if fitted Outlet command Pump Three way diverter valve Gas valve Fan Ignition electrodes Display indicates Er control panel electronic p c b Figure 9 1 The fundamental function of the Main electronic control ignition p c b is that of controlling the boiler in relation to the external needs i e heating the dwelling or heating the water for d h w use and operating in order to keep the temperature of the hydraulic circuits constant This is obviously possible within the useful power and maximum working temperature limits foreseen Generally the Main electronic control ignition p c b receives inlet information coming from the boiler the sensors or from the outside printed circuit board p c b room thermostat etc pro cesses it and consequently acts with outlet commands on other components of the boiler Figure 9 1 The Main electronic cont
28. The Flue temperature probe NTC A in Figure 20 1 and Figure 20 2 senses the temperature of the combustion products that flow through the condensing heat exchanger a a ta I CHA PJ Figure 20 1 Pa Ifthe temperature of the combustion products circuit reaches the limit temperature the Flue temperature probe NTC reduces the gas flow rate to the burner The temperature of the combustion products should decrease to a safe value temperature In the case that the temperature of the combustion products rea ches a potentially dangerous value it stops the boiler operation lock out This allows the use of plasticmaterials for the flue outlet pipes and bends The use of kits different from the original isn t however allowed since the flue pipes are integral parts of the boiler Figure 20 2 A Safety thermal fuse B in Figure 20 1 Figure 20 2 is also con nected in series with the Flue temperature probe NTC and acts as a safety device in extreme case of incorrect operation of the Flue temperature control system Reaching the breakdown temperature it opens the circuit and locks out the boiler In case of intervention of this safety device the heat exchanger part shown in Figure 20 3 may be damaged and must be replaced Figure 20 3 20 2 Removal Warning i
29. Wall hung fanflue roomsealed high efficiency gas boiler Service manual ActivA Plus Models Activ A Plus 30C Activ A Plus 35C Activ A Plus 16S Activ A Plus 25S Leave this manual adjacent to the gas meter Warning Service repairs must be carried out only by a qualified Gas Safety Registered Engineer who will be responsible for the current Regulations for gas appliances ABIASI TABLE OF CONTENTS 1 OVERALL INFORMATION 4 1 1 Overall VIEW suu x da aS T Ken nie i 4 1 2 Hydraulic diagram 0 0000 a a ee 4 2 GENERAL ACCESS AND EMPTYING HYDRAULIC CIR GUMS uuu a aa ma qaa mata ale een 5 2 1 Nomenclature fa eaae m m et or mr re ge 5 22 CASS Panel Sis sence z w T a OMS a ga Sa Qui aaa dioe 5 2 3 Control panel u imc adi 6 2 4 Main electronic p c b box 6 2 5 Emptying the primary circuit ooooocooooooo 7 2 6 Emptying the d h w circuit T 3 DIAGRAMS oia iaa 8 3 1 Wiring diagram Activ A Plus 30C Activ A Plus 35C 8 3 2 Wiring diagram Activ A Plus 16S ActivA Plus 25S 9 3 9 Circuit voltages nx seb ee nbi UE Aer edu 10 4 FAULT FINDING 000 002 cee eee eee 11 4 1 Display diagnostic u comico i 13 5 CONDENSING HEAT EXCHANGER 14 5 1 FUNCION se cid pase P RF RR ERREUR Eas s 14 5 2 R moVval ci s hee downed ane aha dep gs 14 5 9 Cleaning 2402 0 cde tea bee d eh R
30. a tion which can cause severe irritation to people wearing contact lenses Irritation to respiratory tract Precautions Dust goggles will protect eyes People with a histo ry of skin complaints may be particularly susceptible to irritation High dust levels are only likely to arise following harsh abrasion In general normal handling and use will not present high risk fol low good hygiene practices wash hands before touching eyes consuming food drinking or using the toilet First aid Medical attention must be sought following eye contact or prolonged reddening of the skin 47 SAFETY THERMOSTAT 19 SAFETY THERMOSTAT 19 1 Function The safety thermostat A in Figure 19 1 is a device that senses the temperature of the primary circuit water which flows in the outlet pipe of the condensing heat exchanger If the temperature control system of the boiler fails and the tem perature of the primary circuit reaches a dangerous temperature the safety thermostat opens the electric circuit that supplies the on off operators of the gas valve Consequently the full sequence ignition device attempts to light the burner and at the end locks the boiler and lights the lock out on the display ON a E le Figure 19 1 pa 19 2Checks Overheat temperature va
31. actory set 10 1 bar 25 MAIN ELECTRONIC CONTROL IGNITION P C B 9 5 Checks Check that the fuses are complete If the Main electronic control ignition p c b does not supply any device pump fan etc check that the fuses 10 Figure 9 2 are complete If a fuse has blown replace it with one that has the same cha racteristics after having identified the reason for failure Y Lock sequence Start the boiler until the burner is ignited With the burner firing interrupt the gas supply The Main elec tronic control ignition p c b must carry out four complete ignition cycles and then after about 4 minutes goes to lock out state Switch off and on the electricity supply to the boiler by means of the fused spur isolation switch the device must not unlock and the burner must not turn on 9 6 Removal of the electronic control p c b Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent When replacing the Main electronic control ignition p c b all parameters must be correctly checked adjusted accordin gly with the values noted in table in the installation manual see chapter COMMISSIONING section Setting record for information on parameters see also section 9 4 Remove all the body panels see section 2 2 2 Gain access to the parts located inside the Main electronic p c b box as explained in the section 2 4 of this manual 3 Remove all the wiring con
32. arrow If there is a defect in starting the rotor will begin to turn normally only starting it manually Y Check that the impeller is integral with the rotor With the boiler off remove the front and right hand side case pa nels lower the control panel and empty the primary circuit Remove the pump head by undoing the screws which hold it to the pump body and check that the impeller is firmly joined to the rotor 17 PUMP 7 3 Removal pump 7 4 Removal electrical capacitor Warning isolate the boiler from the mains electricity Warning isolate the boiler from the mains electricity A supply before removing any covering or component A supply before removing any covering or component Remove the front and right hand side case panels 1 Remove the front and right hand side case panels Empty the primary circuit of the boiler 2 Disconnect the connector B Figure 7 3 following the indica 3 Disconnect the connector B Figure 7 3 following the indica tions given on the connector box tions given on the connector box 3 Remove the connector K of the cover box by levering with a 4 Disconnect the earth connector C screwdriver in as shown in Figure 7 4 0382342 ALITONE so so ot Figure 7 4 4 Remove the capacitor connection block L freeing it from the hook M and pulling it as indicated by the arrow Figure 7 5 Figure 7 3 5 Loosen the connection G and pull up and turn to the left the pipe H 6 Re
33. ases 29 Press keys G H Figure 11 5 at the same time again to exit the chimney sweep mode and return to the previously set boiler status Figure 11 11 C h d h w function Figure 11 11 30 Switch off the boiler and turn off the hot water tap s 31 Close the air flue sampling points 32 After adjustment fit the protective brass plug C Figure 11 2 Important after the gas pressure checks and any adjustment operations all of the test points must be sealed 11 4 Checks Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent M Check the on off operators coils 1 Remove the front panel of the case 2 Disconnect the electrical connector E Figure 11 2 3 Measure the electrical resistance between the connector pins of the on off operators as illustrated in Figure 11 12 Upper on off operator r approx 6400 O Lower on off operator approx 920 O at ambient temperature Figure 11 12 35 GAS VALVE 11 5Removal of the gas valve Warning isolate the boiler from the mains electrici 8 Remove the brass plug and turn the plastic screw inside it A ty supply before removing any covering or compo fully clockwise until it stops Do not overtight nent 9 Turn it counter clockwise 2 and 3 4 turns 10 Adjust the gas valve using the flue analyser as described in 1 Remove the front panel of the case as explained in the sec section 11 3 tion 2 3 of
34. be opened or closed 11 2 Description of the parts Figure 11 2 B Maximum gas pressure adjustment C Minimum gas pressure adjustment D On off operators E On off operators electric connector F Gas valve inlet pressure test point Figure 11 2 11 3 Adjustment Warning isolate the boiler from the mains electrici AN ty supply before removing any covering or compo nent Check the supply pressure before making any adjustment to the gas valve 1 Close the gas inlet valve 2 Remove the front panel of the case and lower the control panel see sections 2 2 and 2 3 3 Loosen the internal screw on the Inlet Pressure Test Point F Figure 11 2 of the Gas valve and connect a pressure gauge using a suitable hose 4 Open the gas inlet valve 5 Turn on the electricity supply to the boiler switching on the fused spur isolation switch 6 Setthe boiler in c h d h w function as illustrated in Figure 11 3 C h d h w function Figure 11 3 7 Open at least one hot water tap fully 8 Read the inlet pressure value and ensure that it is within the limits given in the table Gas supply pressures of the user installation manual If it does not comply with the required pressure check the gas supply line and governor for faults and or correct adjustment 9 Switch off the boiler close the gas inlet valve and close the water tap 10 Disconnect the pressure gauge and close the Inlet Pressure Test Point F Figure 11 2
35. chimney sweep function is at maximum output in heating mode Figure 11 9 Figure 11 9 34 GAS VALVE 23 Allow the analyser to give a stable reading 24 Read the CO2 value It should be between Activ A Plus 30C Activ A Plus 35C Type gas Natural G20 CO value range 9 2 9 8 Propane G31 9 9 10 8 Activ A Plus 16S Activ A Plus 25S Natural G20 9 2 9 8 Propane G31 9 9 10 8 To adjust the CO value rotate screw B Figure 11 2 by rota ting it clockwise the CO decreases Checking the maximum gas valve setting in domestic hot water mode 25 Press further key G to vary again the output in chimney sweep mode when the display shows the letters dP that al ternate with the heating water temperature value e g 60 the chimney sweep function is at maximum output in domestic hot water mode Figure 11 10 Figure 11 10 26 Open at least one hot water tap fully 27 Allow the analyser to give a stable reading 28 Read the CO2 value It should be between Activ A Plus 30C Type gas Natural G20 CO value range 9 2 9 8 Propane G31 9 9 10 8 Activ A Plus 35C Natural G20 9 3 9 9 Propane G31 10 0 10 9 Activ A Plus 16S Activ A Plus 25S Natural G20 Propane G31 To adjust the CO value rotate screw B Figure 11 2 by rota ting it clockwise the CO decre
36. e be sure that it is correctly oriented by matching the reference C with the notch D of the water group Figure 16 3 Figure 16 3 TOA FAN AND AIR BOX 17 FAN AND AIR BOX 17 1 Function The function of the Fan A Figure 17 1 is to force the mixture of air and gas into the burner The function of the Air box B is to mix the gas and the air in the right proportion The flow rate of the air gas mixture and consequently the input power of the boiler is proportional to the speed of the fan that is controlled by the electronic control p c b m all H i E CHE e 3 lt T lt Figure 17 1 17 2 Removal of the Air box and the Fan Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent 1 Turn off the gas supply 2 Remove all the case panels see section 2 2 a y USA 57 Figure 17 2 Disconnect the air manifold C Figure 17 2 Disconnect the rubber pipe D Unscrew the gas connector E Remove the fixing fork F and remove the gas pipe G Disconnect the connector H 0 O Q Q Disconnect the fan connector by pressing the plastic hook placed on the side of the connector 9 Unscrew the screws J 10 Remove the fan A with the air box B 11 Remove the screws K and the air box
37. e is stated in Figure 15 1 Q 12500 12000 11500 11000 10500 10000 9500 9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 C Figure 15 1 On the boiler there are four Temperature probes Two on the in put output of the primary condensing heat exchanger c h Tem perature probe A and B in Figure 15 2 and Figure 15 3 two on the input output of the d h w heat exchanger d h w Temperatu re probe C and D in Figure 15 2 Figure 15 4 and Figure 15 5 LC LA ct l X 7 c h c h d h w d h w return flow inlet outlet Figure 15 2 15 2 Checks Temperature resistance relationship Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent Disconnect the cable from the Temperature probe Measure the temperature of the pipes F and H only c h Tem perature probe where the Temperature probes are located and check the electrical resistance according to the graph in Figure 15 1 15 3 Removal of the c h Temperature probes ty supply before removing any cover
38. er ignition on safety lockout E02 RESET Safety thermostat intervention lockout E03 RESET General lockout E04 Y Little pressure in the system or pressure transducer disconnected E05 Y Pressure switch anomaly if present E06 Y Faulty c h temp probe NTC1 or NTC2 E07 4 E08 4 Faulty d h w temp probe NTC Faulty external temp probe NTC with K set E09 Y Faulty flue temp probe NTC if present E10 RESET Flue probe intervention lockout if present E11 RESET Flame detection error El2 4 E13 4 Failure return NTC probe AT delivery return gt 40K if foreseen E14 RESET Faulty pump or primary temperature above 105 C E14 Absence of flow from temperature gradient gt 2K s E20 RESET Lockout EVG E21 RESET Lockout EVG E22 RESET E23 RESET Lockout EVG Lockout EVG E24 RESET Abnormal combustion ignition lock E25 RESET Abnormal combustion operation lock E69 Y Wiring error lockout Boiler not configured Primary circuit temp limit during D h w operation 3 CONDENSING HEAT EXCHANGER 5 CONDENSING HEAT EXCHANGER 5 1 Function The Condensing heat exchanger A in Figure 5 1 has the fun ction of transferring heat produced from combustion of the gas and from the flue exhausted gas to the water circulating in it
39. he key B Figure 9 8 Figure 9 8 4 The setting is confirmed by the visualization of OK and then the display shows the value of changed parameter Figure 9 9 Ne I s Ul aman a Y 2 w PUE M ee Ev Figure 9 9 5 To exit from setting without modifing the set press the keys A or C till the visualization of parameter P 01 show ing the lighting value before the setting Figure 9 10 23 MAIN ELECTRONIC CONTROL IGNITION P C B Important at the end of the setting operation it is important EN 1 Va to fill update the table in the installation manual see chapter LE MX COMMISSIONING section Setting record gf H ri PARAMETER VALUES SET nm mn Boiler type to be upda 00 No power Er 99 NE S ted with the complete 35 Activ A Plus 25C A range 36 Activ A Plus 30C 37 Activ A Plus 35C 40 Activ A Plus 16S 41 Ac C Type of water sensors C h d h w Figure 9 10 6 In order to pass from a parameter to another press c h set keys A or C at the same time until P 02 are displayed on the display indicating the entry in the parameter 02 and the value of parameter Figure 9 11
40. iasi UK Ltd Commercial Road Leamore Enterprise Park WALSALL WS2 7NQ Sales Tel 01922 714600 Tech Service Tel 01922 714636 www biasi co uk
41. ing or compo Warning isolate the boiler from the mains electrici nent 1 Remove all the case panels and the sealed chamber lid 2 Empty the primary circuit of the boiler 3 Remove the electric connector G and E and unscrew the c h Temperature probes A and B Figure 15 3 4 Reassemble the c h Temperature probes carrying out the re moval operations in reverse order Figure 15 3 44 TEMPERATURE PROBE 15 4Removal of the d h w Temperature probes Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent Removal of the d h w Outlet Temperature probe 1 Remove the front panel of the case and lower the control panel Empty the d h w circuit of the boiler Remove the electric connector Figure 15 4 Remove the fork J and pull the d h w Temperature probe C Reassemble the d h w Temperature probe carrying out the removal operations in reverse order Q Q N EA Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in con tact with foods and approved by the local water Au thorities Figure 15 4 Removal of the d h w Intlet Temperature probe 6 Remove the front panel of the case and lower the control panel 7 Empty the d h w circuit of the boiler 8 Remove the electric connector K Figure 15 5 9 Remove the fork L and pull the d h w Temperature probe D 10 Reassemble the d h w Tempera
42. irbox Electronic controlbox airgasmixer Three way diverter valve f D h w heat Gas restrictor I A exchanger U lt Condensate tra Main circuit S i pressure switch C h pressure relief valve OIDO al m ooh Ae a OM MO Electric actuator N 7 NT diverter valve Automatic air purger valve D h w D h w temperature probe Cas valve ficus wich y Pump Figure 1 1 1 2 Hydraulic diagram Central heating c h operation Domestic hot water d h w operation A C h C h D h w D h w water return water flow inlet outlet Figure 1 2 mm GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS 2 GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS 2 1 Nomenclature Figure 2 1 Right side panel Front panel Control panel Main electronic p c b box Left side panel NAON 2 2 Case panels Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent For the most part of the check and maintenance operations it is necessary to remove one or more panels of the case The side panels can be removed only after the removal of the front panel To remove the front panel loosen screws A Figure 2 2 lift the
43. iv A Plus 16S 1 BI1313 100 Burner mod Activ A Plus 30C Activ A Plus 35C 1 BI1313 101 2 Expansion vessel 1 BI1462 100 3 H58 660 Condensing heat exchanger 1 BI1432 101 mod Activ A Plus 30C Activ A Plus 35C H58 659 Condensing heat exchanger 1 BI1432 100 mod Activ A Plus 25S Activ A Plus 16S 4 Fan 1 BI1313 102 5 Gas valve 1 BI1313 103 SIT 848 Sigma 0848135 6 H50 189 Safety valve mod Activ A Plus 30C Activ A Plus 35C 1 BI1181 100 Watts 6 E83 013 Safety valve mod Activ A Plus 25S Activ A Plus 16S 1 BI1131 100 Watts T Main Electronic control ignition p c b 1 BI2035 100 8 Interface electronic p c b 1 9 Control panel electronic p c b 1 10 E01 205 D h w heat exchanger 1 BI1001 102 11 Pump 1 12 H74 553 Temperature probe main circuit 2 BI1442 106 13 D h w flow switch 1 BI1441 501 14 D h w flow sensor 1 BI1441 104 15 Primary circuit pressure switch 1 BI1431 101 16 Three way diverter valve electric actuator 1 BI1431 100 17 H20 989 Condensate trap 1 BI1262 118 18 E83 101 Overheat thermostat 1 BI1172 105 ELTH type 261 19 H58 661 Flue temperature probe NTC 1 BI1432 102 20 E23 792 Fuse 2 AF 250VAC 5x20 3 BI1165 112 21 169 016 Temperature probe D h w circuit 2 KI1042 501 22 H58 709 Detection electrode 1 BI1293 103 23 H58 709 Ignition electrode 1 BI1293 102 52 SHORT SPARE PARTS LIST Figure 22 1 53 20 80 EUR AU IO UE LIMIT 17962 2101 0 2711 56A4 UK B
44. iver in as shown in Figure 8 5 Figure 8 5 Reassemble the three way diverter valve carrying out the remo val operations in the reverse order EA Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in con tact with foods and approved by the local water Au thorities Attention When reassembling the three way diverter valve be sure that the three way diverter is correctly oriented by matching the reference H with the notch of the water group Figure 8 5 8 5 Removal of the diverter group 1 Remove the front and both side case panels 2 Empty the primary circuit and the d h w circuit of the boiler 3 Remove the electric actuator section Removal of the elec tric actuator page 19 4 Remove the fixing spring Figure 8 6 and remove the pri mary circuit flow switch J 5 Disconnect d h w temperature probe K s q Figure 8 7 6 Unscrew the connector L Figure 8 7 the c h flow connector and the d h w outlet connector 7 Remove the d h w heat exchanger see Removal page 16 8 Unscrew the screw M and remove the diverter group 9 Reassemble the diverter group carrying out the removal op erations in the reverse order EA Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in con tact with foods and approved by the local water Au thorities 20 MAIN ELECTRONIC C
45. lue 1 Run the boiler and set the temperature at maximum by press ing the appropriate key 2 Allow the boiler to reach its maximum operating temperature monitor the temperature gauge on the instrument panel The boiler shouldmaintain a temperature below that of the safety thermostat and no overheat intervention should occur ty supply before removing any covering or compo Warning isolate the boiler from the mains electrici nent Electrical function 1 Remove all the case panels and the lid of the sealed cham ber 2 Disconnect the safety thermostat and check its electrical fun ction Normally no intervention the contact must be closed electrical resistance zero Q 19 3 Removal Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent Remove all the case panels Disconnect the wiring B detail in Figure 19 2 Unscrew the screws C and remove the overheat thermostat N Figure 19 2 4 Reassemble the overheat thermostat carrying out the opera tions in reverse order 5 Apply an adequate quantity of heat conducting compound between the pipe and the thermostat Warning After cleaning or replacement as detailed above if it deemed necessary to undertake a com bustion analysis as detailed in section 11 3 48 FLUE TEMPERATURE PROBE NTC AND SAFETY THERMAL FUSE 20 FLUE TEMPERATURE PROBE NTC AND SAFETY THERMAL FUSE 20 1 Function
46. move the fork F loosen the connection J and remove the pipe l 7 Remove the locking plate D Unscrew the two screws E that hold the pump on the frame and remove the pump Figure 7 5 Reassemble the pump carrying out the removal operations in the reverse order When reassembling the pump check the correct location of the O ring gasket in the inlet port of the pump that seals the connection between the pump and the plastic group 18 THREE WAY DIVERTER VALVE 8 THREE WAY DIVERTER VALVE 8 1 Function The diverter valve A Figure 8 1 has the function of modifying the hydraulic circuit of the boiler by means of an electric command given by the electronic control p c b in order to send the water that exits the primary heat exchanger towards the c h system or towards the d h w heat exchanger E c q A i M ii 5 HO mE Figure 8 1 8 2 Checks A Warning check the electrical continuity Figure 8 2 indicates the relationship between the electric com mand coming from the electronic control p c b and the position of the actuator B brass spindle when the boiler operates in d h w mode Figure 8 3 indicates the relationship between the electric com mand coming from the electronic control p c b and the
47. ndex Primary circuit pressure J00 value External temperature J01 value K curve value configured in loco J02 value Offset climatic curve value J03 value een set point with climatic curve Joa value Temperature NTC delivery J05 value Temperature NTC return J06 value Domestic set J07 value Temp Dhw inlet if foreseen J08 value Temp Dhw output J09 value Dhw capacity J10 value Flue temperature if foreseen J11 value Fan speed if foreseen J12 value Pressure transducer pressure if foreseen J13 value lonization value J14 value Number of months to maintenance J15 value ona m J16 value HWCH Hardware code high J17 value HWCL Hardware code low J18 value SWCH Software code high J19 value SWCL Software code low J20 value 10 4Function modes setting modality It is possible to select the various boiler control function modes hereafter named parameters by using the keys of the control panel p c b During the function modes setting the boiler does not operate To get in function modes setting modality see section 9 4 10 5Removal of the control panel electronic p c b ty supply before removing any covering or compo Warning isolate the boiler from the mains electrici nent Remove all the body panels see section 2 2 2 Gain access to the parts located inside the Control panel elec tronic p c b as explained in the section 2 3 of this manual 3 Remove all the wiring M connected t
48. nected to the Main electronic con trol ignition p c b 4 Delicately flex the hooks F in the directions indicated Figure 9 13 in order to release the circuit from the box 5 Remove the Main electronic control ignition p c b JS in A Figure 9 13 6 Re assemble the Main electronic control ignition p c b fol lowing the removal procedures in the reverse order Important When re assembling the Main electronic control ignition p c b 7 Itis not necessary to utilise static protections but it is advis able to ensure that the pcb is handled with care and held at the edges andwith clean dry hands Attention After installing the Main electronic control ignition p c b properly set the parameters above it is deemed necessary to undertake a com T Warning After cleaning or replacement as detailed bustion analysis as detailed in section 11 3 26 MAIN ELECTRONIC CONTROL IGNITION P C B 9 7 Thermal control in the 3 mode Switch in the function mode Taking water from the domestic ho water circuit YES circulator on NO circulator off fan still lt YES Is primary circuit temperature higher than that selected Main circuit pressure ES switch consense YES NO stop circulator 3min NO YES lock memorised NO i starts fan checks fan
49. nt way to verify the integrity of the spark generator When the fan turns but the burner does not light a possible cause is a faulty spark generator and it is advisable to replace it to locate the fault Check the position of the electrode edges Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent 1 Remove the ignition electrodes see section Removal of the Ignition and detection electrodes page 45 2 Check for the correct distance between the metallic edges of the ignition electrode see Figure 18 7 Figure 18 8 46 IGNITION AND DETECTION ELECTRODES 3 5 mm earth electrode Ignition electrode Figure 18 7 Check the connection wires Warning isolate the boiler from the mains electrici ty supply before removing any covering or compo nent Figure 18 8 Remove all the case panels and the sealed chamber lid 2 Check for the integrity of the insulation of wires which con nect the electrodes to the spark generator and to the control ignition p c b Warning Insulation panelsmaterial handling care Mineral fibres are used in this appliance for the insulation panels of the combustion chamber Excessive exposure to thesematerials may cause temporary irri tation to eyes skin and respiratory tract Known hazards Some people can suffer reddening and itching of the skin Fibre entry into the eye will cause foreign body irrit
50. o the Control panel elec tronic p c b Figure 10 3 Figure 10 3 4 Unscrew the screws L and K 5 Remove the Control panel electronic p c b 6 Reassemble the Control panel electronic p c b carrying out the removal operations in the reverse order 10 6Removal of the interface electronic p c b Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent 31 CONTROL PANEL ELECTRONIC P C B 1 Remove all the body panels see section 2 2 2 Gain access to the parts located inside the Interface elec tronic p c b as explained in the section 2 3 of this manual 3 Remove all the wiring N S O e P connected to the nterface electronic p c b Figure 10 4 TEES in IB Figure 10 4 Unscrew the screws R and Q 5 Remove the Interface electronic p c b Reassemble the Interface electronic p c b carrying out the removal operations in the reverse order 32 GAS VALVE 11 GAS VALVE 11 1 Function The gas valve A in Figure 11 1 controls the gas inflow to the boiler burner gt s E n A um Figure 11 1 By means of an electric command given to the on off operators the passage of the gas through the Gas valve can
51. ock E69 x Wiring error lockout E99 Pa Boiler not configured Boiler in chimney sweep in function The activation of the chimney sweep occurs configuring the parameter P09 01 and is visualized LP minimum dhw hP minimum heating cP maximum heating dP maximum dhw The transition occurs with keys A increase and B decrease dhw temperature The writing on the display alternates L01 Primary circuit temp limit during D h w ope ration Boiler Stand By hyphens are turned on in sequence to simulate running antifreeze protection activated 30 CONTROL PANEL ELECTRONIC P C B 10 3Info modality The INFO mode allows the display of some information on the boiler functioning status In case ofmalfunctioning of the boiler it may be useful to communicate such information to the Autho rised Service Centre Engineer so that the causes can be under stood In order to access the INFO mode press keys A Figure 10 1 the index J00 and the value of the parameter appear on the display Figure 10 2 Figure 10 2 To scroll the values press B reduce and A increase keys Fi gure 10 1 In order to exit the INFO mode hold keys A and C Figure 10 1 pressed at the same time The following table gives details of each parameter and the possible value that can be show Value visualised I
52. ontrol p c b and if it does not activate the control board will indicate that a fault condi tion see section 4 1 of this manual has occurred 12 2Checks Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent M Electrical check It is possible to verify the general operation of the switch by mea suring the electric resistance between the contacts bk and wh of the switch 1 Measure the electrical resistance between the tabs bk and wh Figure 12 2 The contact must close resistance zero with c h pressure of 0 35 bar or higher The contact close resistance zero with c h pressure of 0 35 bar or higher bk black rd red Figure 12 2 12 3 Removal Warning isolate the boiler from the mains electrici AN ty supply before removing any covering or compo nent 1 Remove the front and right hand side panels of the case turn off the flow and return isolation valves and empty the primary circuit 2 Remove the fixing spring D Figure 12 3 and remove the pri mary circuit pressure switch C 3 Disconnect the connectors E Figure 12 3 Figure 12 3 4 Reassemble the primary circuit pressure switch in reverse order of removal Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in contact with foods and approved by the local water Authorities Ht EXPANSION VESSEL AND PRESSUR
53. or F 3 Unscrew the screws G and remove the ignition electrodes B and the detection electrode C 4 Assemble the Ignition and detection electrodes carrying out the removal operation in reverse order 18 3 Removal of the burner Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent 1 Remove the air box and the fan see section Removal of the Air box and the Fan page 44 2 Remove the Ignition and detection electrodes see section Removal of the Ignition and detection electrodes page 45 3 Unscrew the screws H Figure 18 1 and remove the cover of the combustion chamber 4 Unscrew the screws Figure 18 1 and remove the Air gas duct lid 5 Remove the burner by sliding it forward burner gasket locating tab Figure 18 3 6 Assemble the burner carrying out the removal operation in reverse order Ensure the burner is correctly located by lining up the locating tab Figure 18 3 45 IGNITION AND DETECTION ELECTRODES burner gasket Air gas duct gasket Figure 18 4 Before reassembling ensure the burner gasket is correctly located Warning After cleaning or replacement as detailed abo A ve it is deemed necessary to undertake a combustion analysis as detailed in section Adjustment page 33 18 4Removal of the front insulation panel See warning note at the end of this
54. overing or compo nent To gain access to the parts located intomain electronic p c b box proceed as follows 1 Remove the front panel of the case Terminal block lid removal 2 To remove the terminal block lid F Figure 2 7 free the front hooks Figure 2 7 3 Slightly rotate the lid as indicated by the curved arrow and free the rear hooks 4 Remove the lid Main electronic p c b lid removal To get access to the main electronic p c b 5 Pull the box that contains the electronic p c b and rotate it Figure 2 8 Figure 2 8 GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS 6 Remove the terminal block lid F Figure 2 7 7 Free the hooks placed on the three sides indicated and rotate the lid towards left Figure 2 9 Figure 2 12 Figure 2 9 2 6 Emptying the d h w circuit 1 Close the d c w inlet cock H Figure 2 10 2 Open one or more hot water taps until the boiler has been 2 5 Emptying the primary circuit completely emptied 1 Close the c h circuit flow and return cocks G Figure 2 10 Figure 2 10 Remove the front and right panels of the boiler Open the drain tap Figure 2 11 combi or Figure 2 12 only c h until the boiler is completely emptied 4 To help the draining of the primary circuit loose the condens ing heat exchanger air purger valve CLOSED Figure 2 11 DIAGRAMS 3 DIAGRAMS 3 1 Wiring diagram Activ A
55. position of the actuator B brass spindle when the boiler operates in c h mode In both figures the relationship between the position of the actua tor and the resistance of the motor windings the motor must be disconnected from the wiring is also given B Spindle visible Ia 9 4 Kohm Open circuit bk bu bn bk black gt bu blue slo bn brown SIX Figure 8 2 D h w mode B Spindle not visible Open circuit 9 4 Kohm bk bu bn bk black gt bu blue o gt bn brown SIS Figure 8 3 C h mode 8 3 Removal of the electric actuator Warning isolate the boiler from the mains electrici A ty supply before removing any covering or compo nent 1 Remove the front case panel 2 Disconnect the connectors C Figure 8 4 3 Remove the fixing spring D and remove the actuator E Reassemble the actuator carrying out the removal operations in the reverse order When reassembling the actuator refer to Figure 8 3 or to the wiring diagram in section 3 for the correct wiring connection 19 THREE WAY DIVERTER VALVE Figure 8 4 8 4 Removal of the three way diverter valve 1 Remove the front and both side case panels 2 Empty the primary circuit and the d h w circuit of the boiler 3 Remove the electric actuator see Removal of the electric actuator page 19 Remove the fixing spring F Figure 8 5 5 Remove the threewaydiverter valve G by levering with a screwdr
56. rol ignition p c b is also a full sequen ce ignition device and does a sequence of operations ignition cycle which lead to the ignition of the gas at the burner lt checks the presence of the flame during the entire period in which it is activated and supplies the fan regulating its speed The Main electronic control ignition p c b has a safety function and any incorrect interventions or tampering can result in condi tions of dangerous functioning of the boiler The Main electronic control ignition p c b can lock the functio ning of the boiler lock state and stop its functioning up to the resetting intervention The lock out is signalled on the display of the printed circuit board p c b and can be reset only by using the boiler reset button placed on the control panel electronic p c b see section 10 1 Some components which are connected to the device can acti vate the lock state The causes of a lock state could be The intervention of the safety thermostat overheat of the pri mary circuit The intervention of the flue temperature probe overheat of the combustion products Afault on gas supply Faulty ignition faulty ignition electrodes their wiring or connection Faulty flame detection faulty detection electrode its wiring or connection Faulty condensate drainage Faulty gas valve faulty on off operators or not electrically supplied Faulty Main electronic control ignition p c b
57. rpm NO Is fan rpm YES temperature higher than 110 C NO exact 7 Y YES A Ye beginning of wait period Y A flame presence YES End of wait NO period starts ignition discharges interrupts ignition discharges Opens gas valve flame presence gas valve open beginning of ignition period fan runs closes gas valve at es stops fan NO Engar ignition YES interrupts ignition discharges period memorizes lock display show lock out m NO reset key Is fan rpm NO pressed YES gt Safety thermostat or flue temperature probe lock out YES Figure 9 14 225 MAIN ELECTRONIC CONTROL IGNITION P C B 9 8 Thermal control in the se mode Switch in the um function mode See functioning with the function Taking control in the J mode lt YES water from the domestic ho water circuit Request for heat from room thermostat NO NO sec 9 7 circulator off fan still YES circulator on Is primary circuit temperature higher than that selected Main circuit pressure Switch consense YES YES NO gt stop circulator 3min NO YES NO lock memorised L cancels lock starts fan checks fan rpm Is fan rpm exact NO NO temperature higher than 110 C YES i Le beginning of wait period I YES flame presence End of wait period NO
58. seJd y YOoYD saseb any ay jo an ea OO au Y92949 ez A eue on ay Buisn indu jeeu eujuou ay uoeejjuseopJeloqeu 6 991 soyu ejes MOY e ues senjeA Jedoid Jo jenuew uonelj e sui Bugjes anjea seb ay 10 anjea 9U 1 J 1 e si Buipea siu je1souueu jojes y jo uonueAJ9jul y pue yN ule ay JO Bueeu Jano ay esneo pinos ssed q powwel y jenuew uonejejsur osje ees Buil 1294100 sy juaa pue noo ay Jo sseupunos JO 429u2 Je loq eu Aq xoeq payons jou si seb jsneuxe ey euns u pue seoueJeej ees pej ejsul AnoeJuoo si jeur eni ay yeu AJU A suononujsqo jo eouesqe pue sseupunos 104 499u2 sseujufi sef 10 de uonejosi pue edid Ajddns sef ay yoouD uonoeuuoo ejneu pue aul jo juejod ay 49049 sesnj euJajxa pue Bnd ejqeo Ajddns jo AjuBejur ay Aja N Ienn u pue 1 euj ueewjeq A0 z40 x499u9 L Ly uonoes ees eldsip e ueijdde ay Aq uaAIB uoneoipur jeorndo 34 uioJ osje peurejqo eq ueo uorneulnojJul njes JON Re dsip y uo 3 se pejeorpul S no 4907 HO S Jejioq y uaym SALA j9Jes y woy Syed J JEAA y a uo uonesado Buunp SNA jajes ay WO Syed I JEAA 9jeJ MO J WU p MOT epoui y o ui uoneJedo Je nBes eunye1eduje Wu p 100d 6 ainjeladula A U p uo 100d Ja1oq ASION uone inpoul 19 uoou gpow WWp uo poeJoo sejejedo Jajloq eu yeay Jou seop ujejs s y o au p
59. solate the boiler from the mains electrici A ty supply before removing any covering or compo nent 1 Remove all the case panels 2 Disconnect the connector C from the Flue temperature probe NTC by pressing the plastic hook placed on the side of the connector 3 Unscrew and remove the flue temperature probe A Figure 20 2 from the condensing heat exchanger 4 Assemble the Flue temperature probe NTCcarrying out the removal operations in reverse sequence 20 3 Checks Overheat temperature value 1 Set the temperature control knobs to their max position and run the boiler in d h w and c h 2 Allow the boiler to reach its maximum operating temperature monitor the temperature gauge on the instrument panel The boiler shouldmaintain a temperature below that of the Flue temperature probe NTC and no overheat intervention should occur V Temperature resistance relationship 1 Remove the Flue temperature probe NTC see section 20 2 2 Measure the Flue temperature probe NTC electrical resistan ce at the ambient temperature and check it according to the graph in Figure 20 4 49 FLUE TEMPERATURE PROBE NTC AND SAFETY THERMAL FUSE Q 12500 12000 11500 11000 10500 10000 9500 9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 o 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 C
60. t a ka 15 6 D H W HEAT EXCHANGER 16 6 1 FUNGUOM aa a aning iann e a aio 16 6 2 Removal iconos ia 16 T PUMP iii rr AA 17 7 1 F rictiot s a ri o a RR suaqqa 17 7 2 CHECKS us squa oen onc ehem quqa a 17 7 3 Removal PUMP sis asear ri ret de aa 18 7 4 Removal electrical capacitor 18 8 THREE WAY DIVERTER VALVE 19 8 1 FUNCION rodada os 19 8 2 Checksi LS dra ene ig ce onte alada 19 8 3 Removal of the electric actuator 19 8 4 Removal of the three way diverter valve 20 8 5 Removal of the divertergroup 20 9 MAIN ELECTRONIC CONTROL IGNITION P C B 21 9 1 F fictiol u a iaa 21 9 2 Selection and adjustment devices o 21 9 3 Checking the temperature 22 9 4 Setting the boiler control function modes 23 A A BRE Rae y cp oit ems d usce e RH 26 9 6 Removal of the electronic control p C D 26 9 7 Thermal control in the x A then Re 27 9 8 Thermal control in the IOC iste sa eed ce Rd Brauer 28 10 CONTROL PANEL ELECTRONIC P C B 29 10 1 FUNCION siria et 29 10 2 Normaly information 2 u u iniae uY au qu Sie 29 40 37 Infoxmodality eeds ia zoe a NR 31 10 4 Function modes setting modality 31 10 5 Removal of the control panel electronic p c b 31 10 6 Removal of the interface electronic p c b
61. tch A in Figure 14 1 is a device that generates an electrical signal when hot water is drawn t al M l JL Figure 14 1 p lt When the flow rate through the d h w circuit reaches about 2 5 litres min the sensor closes the electric contact that switches the boiler d h w operation ON 14 2 Description and location of parts Figure 14 2 1 Flow switch plug 2 O ring 3 Flow limiter Activ A 30C Activ A 35C optional accessory 4 Body with flow meter turbine 5 Filter am p ey 2 3 Figure 14 2 14 3 Removal of the sensor Warning isolate the boiler from the mains electrici ty supply before removing any covering or compo nent Figure 14 3 1 Remove the front panel of the case 2 Disconnect the connectors B and remove the sensor holder C Figure 14 3 3 Remove the sensor 14 4 Checks ty supply before removing any covering or compo Warning isolate the boiler from the mains electrici nent Sensor operation 0 32 Hz without flow rate 33 200 Hz witht flow rate wh white bu blue rd red Figure 14 4 1 Remove the front panel of the case 2 Don t disconnect the connectors B 3 Measure the electrical frequency at the leads of the sensor Without flow rate the electrical
62. this manual 2 Disconnect the connector J Figure 11 13 After any service operation on the components of the gas circuit check all the connections for gas leaks Warning After cleaning or replacement as detailed above it is deemed necessary to undertake a com bustion analysis as detailed in section 11 3 Figure 11 13 3 Turn off the gas supply and disconnect the gas isolation cock connector from the inlet port of the gas valve 4 Using pliers remove the spring L and the rubber pipe M Fig ure 11 13 5 Unscrew the connector N remove the fixing fork O and re move the pipe P Unscrew the screws K and remove the valve 7 Reassemble the valve carrying out the removal operations in reverse order Warning Be careful not to damage the OR gasket of A the gas pipe when inserting the pipe in the air box air gas mixer Before fitting a new valve it is advisable to preset it as fol lows 36 PRIMARY CIRCUIT FLOW SWITCH 12 PRIMARY CIRCUIT FLOW SWITCH 12 1 Function The Primary circuit flow switch A in Figure 12 1 function is to check the presence of water in the primary hydraulic circuit and that the pressure is above the minimum Ww NS X Figure 12 1 This device is connected to the main electronic c
63. ture probe carrying out the removal operations in reverse order EA Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in con tact with foods and approved by the local water Au thorities Figure 15 5 42 BY PASS VALVE 16 BY PASS VALVE 16 1 Function The By pass valve A in Figure 16 1 is located between the c h water flow and return and its function is that of guaranteeing a minimum flow across the primary heat exchanger if the circula tion across the c h system is completely closed The By pass valve is fitted on the rear side of the diverter group lt X Figure 16 1 16 2 Removal Warning isolate the boiler from the mains electrici AN ty supply before removing any covering or compo nent 1 Remove all the case panels 2 Empty the primary circuit of the boiler 3 Remove the locking plate B and pull up the by pass valve A Figure 16 2 Figure 16 2 4 Reassemble the by pass valve as illustrated in Figure 16 2 reversing the order of removal Cr Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in con tact with foods and approved by the local water Au thorities Attention When reassembling the By pass valv
64. ue 2x06 seuoeei yno urew ay Jo eunjejeduje ay pow y o uo Aejdsip uo uoneoipul 13 ON WWp yo Bumweup e Buunp u A apou yo ui uone1gedo JejnBay de3 ay uo J9 e pjoo wy p Ajddns jou seop 1e loq eu L 119s ue4 340 Aejdsip jeued ouo ay L epoul WU p JO y o ul 194419 jejs jou SBOP JeJloq eu L eqouJd duu jeu19 X3 oBneD eunsseJgd 9AJE jajes 9ssan uoisuedx3 OLN 9qoud dws an y JOJ911I89J Sec jejsouueu Ajejes epoJjoeje uonoejeg epoJjoeje uou JOJ911IS9J Jie ue4 anjea ssed Ag egoud dwe my q eqouJd duu 19119 ule Jeyy wu q anjea Sec q o d ujoeje jeued ionuoo sbumes Jejog q o d oiuojosje uen q o d 91uo0a13 sesn4 UoIAS Mol W U d 9AJE JOLOAIG duing JeBueuoxe jeeu wu q YOUMS eJnsseuJd jinoJr ule N JeBueuoxe jesy Bursuepuo noso wu nouo yD den pue edid ureup puoo sedid an y eui Ajddns seo aul Aj ddns samog 4 3no 320 eoueiddy T pajeq 2 lrozlizelizer ver ZL 9b zs GVLICClLIV LL OL S6 Evl csgcl 9 v Ve z U sjax9e q ul jas ajou lt Jenuew ay jo uon529S x99uo o slu uoduioo FAULT FINDING 4 1 Display diagnostic The display indications provide help in the diagnosis of fault fin ding The control panel display gives other information for the user The following table gives fault code error and the reson for the fault E01 RESET Lack of burn

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