Home

Service Manual

1. 3 F ine piers FREE the main CENT Error Code Error Code Description Chapter 4 Troubleshooting Possible Remedies This Eur Craie ama ren CH np Gree Rappers 1 Check CH iermperalusme neris ase ame SEULE 2 Errriiance i repe 3 Eine pbir zn reps BEMINTANT E EE erp ad ram Cee oe mg alie rrr FER rl ee rbd LE n 2 9 the tm ces care puer umeen oY present af the col replace the En NE ihe nal Ime pier circi pres ab tape cnni MACON power nol 1 Tum OF angi ad tae peser feed ing pure 2 Chpck areg connections ip mite valer adi are 1 pump OF ani peser in ine pre 2 Chpck conne ip mite valer al are 528 REV 8 01 14 Chapter 4 Troubleshooting 70 Error Code Description LP 528 REV 8 01 14 Possible Remedies Th s Emer Cie riens ee cocon reel Er happens Tum OFF angi D thee arcad peer in ine pure
2. all UA Either the CH or DHW Outdoor Temperature Mode 1110 AN roro os X w Pump is Operating Shuts DewntctH Mode during Wisi T Weather Conditions T Requires Optiamal Outdoor Sensar 22 erem NOTE Icon wil Flash if Outdoor Sensor aliance is 5 2 im l rana ahrenhert Indicators or 0 10 Volt is nolconnected Operating in DHW Displays Numerals and indu Characters Control panel mode Status display mode Display More will activale nhen he HE bution pressed amd heki Seconds ihe depay panel powered ON Tum the dial cnunierciocinaise and cochense io sod hough the dispioperi parameters To view parameter dels Eie bulon ihe qa cree Press the HE cw 0 im eave the poranek Press he bution Operation hode Te on Lock Mode press fhe ion atthe dc parameker Tum he dii gt counieciochese nr On or Of Pres he 77 bullion fhe secim and riun he parameters Press he bution agen relum ip Operaimn hode BOTE The will mot he charges if Lock Mode akak Lock Mee herve in be hred fT bei making tthe ranges LP 528 REV 8 01 14 39 Chapter 3 How to use control panel Control panel mode Installer Setting Mode acini nhen the powered on press ihe bulton
3. After 0 ot has been displayed by Press dial button for a sec when I rt Turn the dial until 5 shows up pressing current status button for 5 shows up secs turn the dial until it shows I rt Press dial button for a sec when Current ignition attempts number Press current status button for 1 sec 5 IH shows up will be shown ex 95 x10000 after confirmation to go back to the times 950 000times initial status LP 528 REV 8 01 14 Chapter 3 How to use control panel 20 p BBO 4 80 amp J Pump condition current status will 011 be displayed After 0 ot has been displayed by Check RPM by pressing volume pressing current status button for 5 button for 1 sec when P ou _ secs turn the dial until it shows P ou shows up Press current status button with P ou mode to go back to the initial LP 528 REV 8 01 14 21 Chapter 3 How to use control panel Change System Parameters INSTALLER MODE Fault Code history Press current status button for 5 Press dial button for a sec to access com cal 25052 Hed Be secs while display is powered off to viewed by turning the dial enter installer setting mode the codes Press current status button after confirmation to go back to the initial Status Press current status button for 5 Turn the
4. CH Supply Temperature Sensor black white Connector 9 NO Standard Temperature C Resistance k 2 1 Description Part Check Point CN7 Temperature 0 0 1 10 99 Resistance 25 0 1 3 906 Idling Condition 85 0 1 C 0 552 3 Blank is for reference measurement Fixed Number 25 85 3482 4K 2 E Fixed Number of Heat Min While not boiling Dissipation 5 2 71 4 Fixed Number of Heating 8 15 Sec Max 63 2 reaching time while boiling 5 Range of Workable 4 230 F Temperature K _ 2 Water High Limit Temperature Sensor Exhaust Temperature Sensor 9 4 6 fe m als Storage Temperature Sensor lt DHW Temperature Sensor CH Supply Temperature Sensor LP 528 REV 8 01 14 E Chapter 2 Components description Description Part Burner Overheat Switch 7855P 066 Check Point 11 Burner Overheat limit switch prevents damage to burner plate caused by Function temperature exceding 392 F Failure Event Detects overheating temperature if switch has an abnormal condition Effects Boiler shuts down if burner plate temperature exceeds the setting temperature 1 Check the connection around the overheat limit switch and use a multi meter to measure resistance If resistance is 0 Ohm replace the switch 2 Check the Switch setting on the Main PCB 3 Check gas orfice Noz
5. Press dial button for a sec when 19 cb is displayed Turn the dial to the desired setting Press dial button to save the Press current status button for a when initial setting is displayed setting sec to go back to initial status after Range 50 100 Default 100 confirmation Press current status button for 5 Turn the dial until 20 db shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 20 db is displayed Turn the dial to the desired setting Press dial button to save the Press current status button for a when initial setting is displayed setting sec to go back to initial status after Range 50 100 Default 100 confirmation LP 528 REV 8 01 14 61 Chapter 3 How to use control panel Internal CH primary pump post run timer T T calling for heat Press current status button for 5 Turn the dial until 21 PP shows up secs while display is powered off to Press dial button for a sec when enter into installer setting mode 21 PP is displayed Turn the dial to the desired setting Press dial button to save the Press current status button for a when initial setting is displayed setting sec to go back to initial status after Range 1min 60min confirmation Default 40min Press current status button for 5 Turn the dial until 22 Po shows up secs while display is powered off to Press dial button
6. um it off beire pressing ani holding he E preszed ani held kr fee cons whi ife powered OA E ihe ceni n Toggle through ilems that can be viewedfthanged by luming he tial an item press the lt buien Some displayed lerne can be changed by fuming the dial cnunierciocimise fp ipwer and dockwise in raise the value Press the lt H iain again ip save Selling To lee Insilier Mode press fhe bulon again The ic power of mode Em hey Check bet 10 era codes ED EE 1 Chr Soiree he popan iemperalure mri be srt 1 11 Hari the set perg of ime 120 mn nk F Ths indan deba amer made p 1 Al mm Del dierent bempergiue falls bei a feed seine IF tempera in ium Example if setpoint is 180 and dieen E 27 F the bummer ON rrr adu n 528 REV 8 01 14 Chapter 3 How to use control panel 40 Display Default niema CH Post Wien E safer Ind T T E cala ir I bummer wi hu OFF and fhe CH pump wi de run thes set
7. wo 981000 LWD1140 06 Fan power start coil SELV 26VDC Fan power end coil SELV 26VDC NE 20 Fan dod feedback signal SELV E 2 ISP Reset port SELV 5VDC eu n RER SMW250 04 ISP TOOLO Data port SELV m 1 S ES Low Water Level Leakage Sensor SELV 12V Central Heating Demand SELV 5 Connect to the Display T Control Thermostat SEGUI LWD1140 16 5 cm Air Pressure Switch SELV 14V 28 ERN Burner Limit SELV 14V Condensate Block SELV 14V LP 528 REV 8 01 14 1 ON Chapter 1 Product Characteristics Connector function Connector no of location and Pin Board Description SELV type nr Silk H es Flame Detect Sensor SELV 5VDC EE ORS Operation water temperature sensor SELV 5VDC DH S DHW temperature sensor SELV 5VDC CN 1 5 LWD1140 14 Returen water temperature sensor SELV 5VDC S Exhaust temperature sensor SELV 5VDC Storage water temperature sensor SELV 5VDC SEES CH Over heat temperature sensor SELV 5VDC SELV 4906 IWM Stepper motor position SELV 14VDC SELV Stepper motor X phase SELV 14VDC CN14 IWM IWM Stepper motor Y phase SELV 14VDC SELV 4906 IWM Stepper motor coil X phase SELV 14VDC IWM power IWM Stepper motor phase SELV 14VDC ES Not Used Not Used SELV 5VDC WPS Not Used SELV 5VDC CN3 Not Used SELV 5VDC SMW250 06 VCC SELV 5VDC FLUX1 Water Flow
8. Press current status button for 5 Turn the dial until 25 So shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 25 S0 is displayed Turn the dial to the desired setting when initial setting is displayed Press dial button to save the Press current status button for a Range 9 F 36 F Default 27 F setting sec to go back to initial status after confirmation j Press current status button for 5 Turn the dial until 26 dt shows up Press dial button when secs while display is powered off to 26 dt is displayed enter into installer setting mode Turn the dial to the desired setting Press current status button for a when initial setting is displayed sec to go back to initial status after confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel Press current status button for 5 secs while display is powered off to enter into installer setting mode Turn the dial until 27 PE shows up dl D P 920C 5 920 Turn the dial to the desired setting when initial setting is displayed Range 1min 60min Default 10min Press dial button to save the setting Press current status button for 5 secs while display is powered off to enter into installer setting mode Turn the dial until
9. b Chapter 4 Troubleshooting When system detects water Freeze Protection temperature below 33 F error code automatic restore 85 appears The unit runs to increase the temperature to prevent freezing Check whether operation of boiler is normal after turning display panel off on Check internal CH and DHW pumps are operational Use a flat head screw driver to rotate a screw on the back side of the pump to ensure the pump internal shaft is not stuck Check pumps wiring to ensure proper connection 3 Ensure storage tank and CH supply temperature sensor are properly connected otorage tank temperature sensor OP sensor LP 528 REV 8 01 14 Chapter 4 Troubleshooting 96 Error code Meaning Cause When exhaust temperature Exhaust temperature exceeds190 F error code 94 overheating issue will appear error will automatically automatic reset reset when exhaust temperature is below 180 F Ensure exhaust temperature sensor is properly connected Check main controller connection Check Exhaust Temperature sensor condition when the resistance value meas ured with a multimeter is replace exhaust temperature sensor LP 528 REV 8 01 14 ae Chapter 5 Replacement Instructions Main components Replacement Instructions Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 98
10. go back to the previous mode H Eh mode to go back to the initial status After 0 ot has been displayed by Press dial button for 1 sec when 4 55 Current hot water tank pressing current status button for 5 shows up status will be displayed ex 130 F secs turn the dial until it shows I St Press dial button for a sec again to Press current status button with 1 56 go back to the previous mode mode to go back to the initial status LP 528 REV 8 01 14 Chapter 3 How to use control panel Current hot overheating sensor tem After 0 ot has been displayed by perature status will be displayed pressing current status button for Dress dial bution for sec when ex 130 F 5 secs turn the dial until it shows J oH shows Press current status button during mode to go back to the initial status Press dial button for a sec again to go back to the previous mode After 0 ot has been displayed by pressing current status button for Press dial button for 1 sec when 5 secs turn the dial until it shows rt shows up Turn the dial until 1 PH shows up Current power input time will be shown ex 875x100hr Press dial button for a sec again to ithe 2 back to the previous mode CSSS initial status LP 528 REV 8 01 14 Chapter 3 How to use control panel View Burner Oper
11. 29 shows up Turn the dial to the desired setting when initial setting is displayed setting LP 528 REV 8 01 14 Press dial button to save the Press dial button for a sec when 27 is displayed Press current status button for a sec to go back to initial status after confirmation Press dial button for a sec when 29 AP is displayed Press current status button for a sec to go back to initial status after confirmation Bp Chapter 4 Troubleshooting 1 Flame Detection Flame Detection Operating Conditions Blower ON Flame Detector Flame Detection Flame Detection Blower ON GV OFF ERROR E72 Flame Detection Blower OFF GV OFF ERROR E11 Normal Operation LP 528 REV 8 01 14 66 Chapter 4 Troubleshooting 2 Gas Detection Gas Detection Blower ON Normal Operation OFF ERROR E40 3 APS Burner overheat limit Condensate Block switch APS overheat limit Condensate Block NO YES Normal Operation IT OFF GV OFF ERROR E29 LP 528 REV 8 01 14 Chapter 4 Troubleshooting 4 Storage DHW Overheat Exhaust Overheat Sensor Sensor detects Blower OFF Normal operation OFF ERROR xxx 528 REV 8 01 14 68 Chapter 4 Troubleshooting Error code T
12. ra nil ee 1 Chec mn cr Ere Eure Aa am tere 2 deter Gwe Genes CCE GE INFR EE 2 Fine proie porki pex Ue main EF qudm 1 ENIM GE OMEN 2 Fine pue EN Sa 1 Ee 2M wales arr apes ine angi are iei Z Eram a bern ne 3 Chec conection ip ETES d GP ECOLE lE and ane na EE ETEGET ec D ER RETE SEHE 4 E ine probes pores reper tiae m ain com This Eurer mill amr een coiffe E Er 1 pres i in a 2 See ae pes ipae anm um 2 Check areg ip ker Grec EGET 18 CEE ION ENDE 4 rin Tuc P E 1 F PES Fe i CM Zulich 6 amd 7 be 1 High Fire E 3 Check Seo E E IEE uem 4 Check es verd fo boo n Chapter 4 Troubleshooting If flame loss issue repeats Flame loss 8 times while unit is operating manual reset error code 10 will appear If flame is not detected within 1minute after ignition trial the unit restarts If ignition tria
13. 53 Internal Storage Tank Pre heating Mode on or off Press dial button for a sec when Turn the dial until 5 57 shows up 5 5 is displayed Press current status button for 5 secs while display is powered off to enter into installer setting mode Press current status button for a sec to go back to initial status after Press dial button during off status to confirmation Turn the dial to set off status when save the setting initial on shows up Default on Press dial button for a sec when 6 0H is displayed Turn the dial until 6 0H shows up Press current status button for 5 secs while display is powered off to enter into installer setting mode 920 920 Press dial button to save the Press current status button for a sec to go back to initial status after Turn the dial to the desired setting when initial 68 setting is displayed setting confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel 820 820 Press current status button for 5 secs while display is powered off to enter into installer setting mode Turn the dial until 7 oL shows up Press dial button for a sec when 7 0L is displayed 820 Turn the dial to the desired setting when initial 5 setting is disp
14. Calling Heal Jm This rure the hiema es he need CH Purp Pos lun completed Ths oq the nera CH Pung again based on the def ull programme CAF angl On cycle ard pes untl Me hiema Pump Post Purge Time Ee ER M eee CCC This Fanci uk re Eres eran bah be hier GH ai Webern DEI AP oF es OH Skrape TENE pans io purge ar irem the sedem amp Test Mode Lange 1 30 era CH Purp and F I hiema DEM Snape pump arp nec m Turre uf when m om me LP 528 REV 8 01 14 4l Chapter 3 How to use control panel Domestic Hot Water temperature control Range 95 120 F Press power M turn on Press hot water the unit temperature control Turn the dial to set desired DHW button to enter DHW temperature temperature setting mode The default tempera ture is set to 125 F 5 9 9 Press heating water temperature button for more than 5 secs to Press dial button to complete convert temperature unit F or C setting Domestic Hot Water high temperature control Range 121 F 140 F Press water temperature control button to enter DHW temperature Press hot water temperature setting mode The default tempera button for 5 secs to set high ture is set 125 F temperature Press dial
15. Although fan operation is normal replace the fan in case the speed is higher than the reference value 3 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting Error code Meaning Cause Mixing valve error Manual reset Mixing valve is unable to detect its zero point fully opened Mixing Valve recognizes zero point after turning off and on the power Check indication of error after basically turning off and on the power If mixing valve doesn t operate normally replace the part Q If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting 90 Error code Meaning Cause Mixing valve is controlled by more than 500 steps and blocked when zero point is recognized for 10 secs Mixing valve operation error automatic reset Mixing Valve recognizes zero point after turning off and on the power Check indication of error after basically turning off and on the power If mixing valve doesn t operate normally replace the part GIf all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious
16. Chapter 5 Replacement Instructions Main components Replacement Instructions Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 22 Chapter 5 Replacement Instructions Main components Replacement Instructions Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 5 Replacement Instructions 100 Main components Replacement Instructions Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 101 Chapter 5 Replacement Instructions Main components Replacement Instructions Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 102 Chapter 5 Replacement Instructions Main components Replacement Instructions Failure to turn the power off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 103 Chapter 5 Replacement Instructions Main compone
17. Sensor SELV 5VDC EN GND SELV 5VDC CN5 FAN RPM Check SELV 5VDC SMW250 10 GND SELV 5VDC LP 528 REV 8 01 14 17 Chapter 2 Components description Description Part Main Control Board 7855P 008 Check Point N A This part controls all components contained in the combination boiler Failure Event Abnormal main controller operation When the main controller has abnormal condition components may not operate properly Check each connection and or wires damage on the PCB Color Wire Number N A LP 528 REV 8 01 14 Chapter 2 Components description 18 CH Supply Temperature Sensor 7855P 031 Storage Temperature Sensor 7855P 057 DHW Temperature Sensor 7855P 094 Exhaust Temperature Sensor 7855P 092 The controller 5 each sensor with setting temperature then goes to Function safety shut down when measured temperature is over the setting temperature Failure Event Sensor malfunction or overheating condition detected Improper temperature measurement Er 16 Er 28 Er 30 Er 32 Er 33 Er 38 Danone Visibly check for breakage of wires and or each connections 9 2 Check each sensor s resistance range with a multi meter CH Water High Limit Sensor black purple Connector 2 2 Storage Temperature Sensor black orange Connector 3 Color Wire Number Exhaust Temperature Sensor black white Connector 2 5 DHW Temperature Sensor black yellow Connector 9 3
18. View Burner Operating Time Unit 1hr View Burner Operating Time X 1000 hr View Ignition cycles X 10 times View Ignition cycles X 10 000 times Pump Condition Display Fault Code History Clear Error Code History System Reset Change DHW Flow Rate Measurement Unit Internal Storage tank Preheating Mode Change maximum outdoor temperature Change minimum outdoor temperature Fan RPM Adjustment Fan Min RPM Adjustment Reset Burner Operating Time Delete Igniting Cycles Boost Function CH anti cycling time Burner ON temperature LP 528 REV 8 01 14 Chapter 4 Troubleshooting LP 528 REV 8 01 14 Warm weather shutdown 58 Maximum CH supply temperature 58 Minimum CH supply temperature 59 Maximum DHW Set Temperature 59 CH Capacity 60 DHW Heating Capacity 60 Internal CH primary pump post run time eee 61 Internal CH pump overrun timer ON 61 Internal CH pump overrun timer OFF 62 Internal DHW Storage Tank Set Point e 62 Internal DHW Storage Tank Differential 63 Delay Time from DHW to CH Mode J e 63 Internal CH Pump Post Purge Timer 6666 64 Internal amp DHW Pumps Test Mode _ 64 Flame Detection 65 Gas Detection 66 APS Burner Overheat Switch 66 Storage DHW Exhaust Overheat 67 Error code 4 68 Error Code 10 rise 11 Error Code 12 Err
19. button to n complete setting Turn the dial to set desired DHW temperature LP 528 REV 8 01 14 Chapter 3 How to use control panel 42 mE control Range 86 180 F Press power Press Central 1 button to turn on heating temperature 0 C D the unit control button to 1 E Turn the dial to set enter temperature desired heating setting mode The water temperature default temperature is set to 180 F Press dial button to complete setting View System Parameters Status Display Mode Outdoor Temperature display Press current status for 5 secs and 0 ot will show up Press power button to turn on the unit Press dial button for 1 sec when O ot shows up Press dial button for 1 sec and Out Press dial button for a sec again to Press current status button with door Temperature will be displayed go back to the previous mode 0 ot mode to go back to initial status LP 528 REV 8 01 14 45 Chapter 3 How to use control panel Water flow rate GPM or LPM Water flow status will be displayed ex 2 64 After 0 ot has been displayed by pressing current status button for 5 secs turn the dial until it shows Press dial button for 1 sec when A GA shows up Press dial button for a sec again to status button during go back to the previous mode mode to g
20. dial until 2 cE shows up Press dial button for a sec when secs while display is powered off to 2 cE is displayed enter into installer setting mode Turn the dial to set status when Press dial button during on status to Press current status button for a initial of shows up save the setting sec to go back to initial status after Default off mode confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel 52 System Reset Press current status button for 5 Turn the dial until 3 In shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when is displayed Turn the dial to set on status when Press dial button during on status to Press current status button for a initial off shows up save the setting sec to go back to initial status after Default off mode confirmation Press current status button for 5 Turn the dial until 4 Fu shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 4 Fu is displayed Turn the dial to set Li when initial Press dial button to save the setting Press current status button for a shows Convert Liter to Gallon during Li status sec to go back to initial status after confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel
21. for a sec when enter into installer setting mode 22 Po is displayed Turn the dial to the desired setting when initial setting is displayed Press dial button to save the Range 1min 60min setting Default 5min Press current status button for a sec to go back to initial status after confirmation LP 528 REV 8 01 14 62 Chapter 3 How to use control panel Internal CH pump overrun timer Off Press current status button for 5 Turn the dial until 23 PF shows up Press dial button for a sec when secs while display is powered off to 23 PF is displayed enter into installer setting mode Turn the dial to the desired setting when initial setting is displayed Press dial button to save the Press current status button for a Range 1min 60min setting sec to go back to initial status after Default 10min confirmation Press current status button for 5 Turn the dial until 24 SF shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 24 SF is displayed Turn the dial to the desired setting when initial setting is displayed Range 140 F 167 F Default Press dial button to save the Press current status button for a 158 s setting sec to go back to initial status after confirmation LP 528 REV 8 01 14 63 Chapter 3 How to use control panel Internal DHW storage tank differential
22. meter Blower GND blue connector 30VDC Power white connector 30VDC Speed feedback signal yellow connector 14VDC VDD connector 30VDC LP 528 REV 8 01 14 Chapter 2 Components description 30 ipti Check Point Description Part Burner Assembly 855 064 Main PCB b R provides the heat source by mixing and combusting air Unable to initialize sustain combustion Failure Event 2 occurs on the surface of burner 3 Gas leakage occurs from burner Abnormal combustion Effects Unstable flame generation Ignition failure ewe ue Visual inspection Unstable flame conditions during operation LP 528 REV 8 01 14 31 Chapter 2 Components description Fire Tube Heat Exchanger Check Point Heats the water by Absorbing the high temperature heat generated by the Function burner Failure Event Water or exhaust gas leakage through the crack 2 Abnormal heat exchange CD Operation of product is stopped Effects 2 Exhaust gas leakage 3 Abnormal noise occurs Error EmorCode EBB E94 Er94 Diaaonostic Check the crack on the surface of heat exchanger x Check the sounds inside the heat exchanger Color Wire Number Wire Number LP 528 REV 8 01 14 Chapter 2 Components description 32 uw Check Point Description Part Condensate Trap 855 053 Main PCB This component reliably discharg
23. outlet temperature sensor is properly connected Check DHW outlet temperature sensor condition When the resistance value meas ured with a multimeter is 0Q replace DHW outlet temperature sensor 3 If all things are normal please replace main controller AAEFNIN Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 nt Chapter 4 Troubleshooting Error code Meaning Cause CH supply temperature When CH supply temperature sensor sensor error malfunctions or gets disconnected automatic reset error code Er 33 will appear Check CH supply temperature sensor condition When the resistance value measured with a multimeter is 00 replace CH supply 3 If all things are normal please replace main controller Failure to turn the power off to appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting 80 Error code Meaning Cause Exhaust temperature When exhaust temperature sensor sensor error malfunctions or gets disconnected automatic reset error code Er 35 will appear Ensure the exhaust temperature sensor is properly connected 2 Check exhaust temperature sensor condition When the resistance value measured with a multimeter is 0 replace exhaust temperature sensor 3 If all things are normal please replace main controller WARNIN Failure to tur
24. status button for a when initial setting is displayed sec to go back to initial status after Range 0 20 min Default 1 min confirmation Press current status button for 5 Turn the dial until 14 00 shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 14 bo is displayed Turn the dial to the desired setting Press dial button to save the Press current status button for a when initial setting is displayed setting sec to go back to initial status after Range 9 F 27 F Default 27 F 528 REV 8 01 14 Chapter 3 How to use control panel 56 Warm weather shutdown Press current status button for 5 Turn the dial until 15 OF shows up Press dial button for a sec when secs while display is powered off to 15 is displayed enter into installer setting mode Turn the dial to the desired setting Press dial button to save the setting Press current status button for a when initial setting is displayed sec to go back to initial status after 50 110 F Default 110 F confirmation Press current status button for 5 Turn the dial until 16 cH shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 16 cH is displayed Turn the dial to the desired setting when initial setting is displayed Range miniimum suppl
25. with after setting completion to go back d Lc mode to go back to the initial _ to the previous mode status LP 528 REV 8 01 14 Chapter 3 How to use control panel CH Supply water temperature Current supply water temperature status will be displayed ex 108 F After 0 ot has been displayed by pressing current status button for Dh eo Von 5 secs turn the dial until it shows E 9p E oP shows up Press current status button during E oP mode to go back to the initial status Press dial button for a sec again to go back to the previous mode DHW outlet water temperature 4 Current DHW temperature status After 0 ot has been displayed by will be displayed 120 F pressing current status button for when 5 secs turn the dial until it shows F dH F dH shows up Press current status button during F dH mode to go back to the initial status LP 528 REV 8 01 14 Press dial button for a sec again to go back to the previous mode Chapter 3 How to use control panel 46 After 0 ot has been displayed by pressing current status button for 5 secs turn the dial until it shows H Eh Press dial button for 1 sec when Current exhaust gas temperature H Eh shows up status will be displayed 130 F Press dial button for a Sec again to Press current status button with
26. E LLL LE LLL LL EL LLL E LT E E T GAS VALVE FLAME DETECTION 3 1 55 35 f flame extinguishes FAN IGNITION GAS VALVE FLAME DETECTION 1 1205 1st 60s 2nd 60s f abnormal ignition Alarm after the 10 trial FAN IEEE IGNITION GAS VALVE FLAME DETECTION 35 1 55 35 1 05 10s 1 0s 3S LP 528 REV 8 01 14 Chapter 1 Product Characteristics 11 nali VAVAUAVA AV A AUA A A AU i og lt ME e gt LLI 4 N 2 4 y m m m m m m m m m mmi ig 04 9494 MOD 49 49 44 m inii 13 Chapter 1 Product Characteristics Wiring Diagram UCM 11 5 Dom TE an t 528 REV 8 01 14 Chapter 1 Product Characteristics Wiring Diagram NER 1 Qoo CE Lu m LS nan n LN gon it T Mixing Valve LP 528 REV 8 01 14 i Chapter 1 Product Characteristics Connector function Connector Descriptions a no of pd and Board Silk SELV Mm Power Supply Line M E rum CN9 e NN NN a Power Supply Neutral T 120 912 AC Power COM Line T 120V RS485 SELV 5VDC RS485 SELV 5VDC RS485 SELV 5VDC RS485 SELV 5VDC fume Go 9810500
27. F Rise 7 1 Gal Hot Water Capacity 45 F Rise 5 5 Gal 77 F Rise 3 2 Gal Installation Indoor Floor stand type Flue System Sealed Combustion Direct Vent Vent Run 2 50ft 3 100ft Schedule 40 PVC CPVC SS NG Orifice Needle 0 232 5 9 mm Orifice Size LP Orifice Needle 0 185 4 7 mm NG 3 5 WC to 14 WC Gas Supply Pressure 3 5 WC to 14 WC Low Fire 273 VENT NG 0 0039 WC 0 002 WC Manifold Pressure High Fire 2 3 VENT NG 0 374 WC 0 216 WC Main Supply 120V 60Hz 6A Power Suppl pply Maximum 160W Power Consumption Ignition System Direct Electronic Ignition Automatic Flame Sensing Burner System Single Orifice Premixed Fuel Modulation Metal Fiber Infrared Gas Valve System Air ratio valve Minimum Flow Rate 0 5 GPM Internal Pipe Material Copper Dimensions W15 7 H53 0 D26 8 shipping Weight 250 lbs Internal Storage Tank Water Capacity 11 Gallon Boiler Heat Exchanger Capacity 4 Gallons 15 Gallons Total Water Capacity Main Controller Control Panel GTX 920C 920 CB HTP CH Pressure Min 15 Max 30 PSI DHW Pressure Connection Sizes CH Supply Return Gas Inlet Max 150 PSI DHW Inlet Hot Water Outlet ES NE 1 NPT 1 2 NPT 1 2 x 3 4 Bell Coupling Provided to Upsize Gas Line Materials Cabinet Cold Rolled Carbon Steel Heat Exchanger Primary Heat Exchanger Stainless Stee
28. Service Manual EFTC 140F Hot Water Combination Boiler Advanced Heating amp Hot Water Systems 120 Braley Road East Freetown MA 02717 1 800 323 9651 www htproducts com LP 528 REV 8 01 14 EFTC 140F Hot water combination boiler Service Manual Model EFTC 140F Hot Water Combination Boiler Natural Gas NG Factory Default e Liquid Propane Gas LP Field Convertible Refer to the gas conversion manual 6 Heat Exchanger bears the ASME Stamp N WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions f you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier LP 528 REV 8 01 14 528 REV 8 01 14 Chapter 1 Product Characteristics Chapter 2 Components description Chapter 3 How to use control panel LP 528 REV 8 01 14 Specifications Dimensions Components Descri
29. and heat capacity control makes domestic hot water highly efficient by maintaining constant temperature during usage Hold this Button More than 5 seconds Press this Butbon Less than 55econds When Control Panel Power i5 OM Change DHW Set Point Temperature Status Display Mode 95 12052 35 49 C When Control Panel Power is OFF Hold this Button Morethan 5 Seconds Installer Mode io Change DHW Set Point Temperature i E p c SPO 121 14058 49 5 60C i A Press this Button Less than 5 Seconds Press this Button Less than 5 Seconds ta i Change CH Set Foint Temperature Turns Control Power Panel ON OFF 86 1B0 F 30 822 Hold this Button More than 5 Seconds er erature Press this Button Less than 5 Seconds URBE Select Menu by Pressing Dial Button Scroll Values by Turning Dial Clockwise of Caunterclockwiset P 920C 4 BD of DC 5 5 mj O LP 528 REV 8 01 14 Chapter 3 How to use control panel 38 CD Specification Lock Mode is la rere Ic Operational Appliance is in a Communication State Antifreeze Modeis Is Heating Stoned Water Operational Status Display Mode Installer Mode is Operational Appliamce Operating in CH Mode icon wil Aaah if there call heat bed 15141 11 Home On md AoA att eo Oo a indicator
30. ater Water flow rate is not detected and water leakage occurs around the mixing Failure Event valve Effects CD Ignition sequence does not start 2 Operation of product is stopped once water leakage is detected Error EmorCode Er Er68 68 Diaaonostic O co 0 Restart the unit Q Check the connection around the mixing valve IWM Inlet Water Modulation GND brown connector DHM Position Sensor orange connector DC 14V white connector Color Wire Number DHM X phase black connector 4 DHM Y phase red connector 9 DC 14V blue connector 6 DHM phase green connector DHM Y phase yellow connector 9 D f9 9 055556606 528 REV 8 01 14 Chapter 3 How to use control panel 36 B Function explanation 1mm PR Dr e po bora pem ur n hraa rr LP 528 REV 8 01 14 37 Chapter 3 How to use control panel Less Je a Beast LEE Pres n dE poor ne h nn Rare an H ler enter iini tuin dr ee a md ol eis Pee eee n ern m Control panel Customized Temperature Control Advanced technology used for the flow sensor
31. ating Time Unit 1hr After 90 08 has been displayed by Turn the dial until 2 rh shows up pressing current status button for 5 secs turn the dial until it shows I rt Press dial button for a sec when Irt shows up Press current status button for 1 sec after confirmation to go back to the Press dial button for a sec when 2 rh Current power input time will be initial status _ shows shown ex 375hr After 0 ot has been displayed by Press dial button for a sec when I rt Turn the dial until 3 rTH shows up pressing current status button for 5 shows up secs turn the dial until it shows Press dial button for a sec when Current power input time will be Press current status button for 1 sec 3 rh shows up shown ex 75 x1000hr 75 000hr after confirmation to go back to the initial status LP 528 REV 8 01 14 48 49 Chapter 3 How to use control panel View ignition cycles displayed value X 10 times After 0 ot being displayed by press Press dial button for a sec when rt Turn the dial until 4 It shows up ing current status button for 5 secs shows up _ turn the dial until it shows Press dial button for a sec when Current ignition attempts number Press current status button for 1 sec 4 It shows up will be shown ex 175 x10times after confirmation to go back to the 1750 5 initial status P 920C
32. cuit Failure Event Jumper is disconected The unit shutsdown unit shutsdown 0 Make sure the jumper is properly connected Color Wire Number Jumped Wire Connection white connector 9 9 9 Vol al of EE af alc CN11 LP 528 REV 8 01 14 23 Chapter 2 Components description APS Air Pressure Switch Check Point Description Part 7855P 017 Main PCB CN11 Function This APS monitors the flue for blockage 08 Combustion noise occurs Failure Event 2 Imperfect and lifting flame occurs 3 The unit will not ignite Effects Pressure due to exhaust vent blockage will affect the boiler operation Check APS wiring connection Check the hose for blockage or kinking Check exhaust vent for blockage Check APS resistance using a multi meter Color Wire Number Air pressure switch blue connector 09 Diagonostic o al el al all elle LP 528 REV 8 01 14 Chapter 2 Components description 24 Condensate Blockage APS Check Point Description Part 7858 017 Main CN11 This switch monitors the condensate This switch monitors the condensate dischage line for blockage 000000 line This switch monitors the condensate dischage line for blockage 000000 blockage Failure Event The unit will not ignite Pressure due to condensate line blockage will affect the boiler operation Check Co
33. ensure correct position LP E as shown 3 5 WC 14 WC From more than DC 2 5V after ignition safety cut off will appear When setting before ignition is less than DC 2 5V Re place flame sensor 2 When setting after ignition is more than DC 2 5V Replace flame sensor Flame detector sensor setting Please check after closing front cover ITEM Before ignition After ignition If the flame sensing viewing port is excessively discolored loss of fame will occur To correct this problem replace the flame viewing glass If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury death LP 528 REV 8 01 14 i Chapter 4 Troubleshooting If temperature on the CH supply CH overheating temperature sensor tagged OP temperature issue on connectors exceeds manual reset 203 F error Er 16 will appear In case that CH supply temperature is more than 203 F water temperature overheating fault occurs and all output except for fan post purge is stopped Check point Check to see if the default DIP SWITCH settings have been changed from the factory settings assure that default settings are set to correct overheating condition Q Please check CH supply temperature sensor wires are tagged OP When the value measured with multi meter is 00 replace the sensor Check internal CH pum
34. es the condensate generated by the Function combustion Failure Event Unneutralized condensate is discharged Product corrosion and environmental degradation are caused by the Effects condensate Check the hose for blockage or bending LP 528 REV 8 01 14 2p Chapter 2 Components description Internal DHW Storage Tank Check Point Transfers energy into DHW to provide stable temperature Failure Event Leakage occurs at DHW storage tank Effects CD Operation of product is stopped Domestic hot temperature fluctuation Replace DHW tank Color Wire Number 528 8 01 14 Chapter 2 Components description Internal CH DHW Recirculation Check Point Description Part Pumps 7855 081 Main PCB Function Provides circulation through the heat exchanger and internal storage tank Failure Event Water flow is not detected Effects Unit does not opperate 2 Internal CH DHW circulation pump is not operating ELM CS CD Visual inspection check wiring for proper connection Internal DHW circulation pump yellow green Connector 2 9 Internal primary circulation pump white Connector 09 kiturarmi LP 528 REV 8 01 14 35 Chapter 2 Components description wu Check Point Description Part DHW Mixing Valve 7855P 043 Main PCB CN14 This component controls DHW outlet temperature by mixing cold and hot w
35. he lemme Screen eme LP 528 REV 8 01 14 1 Unies the pue ip tie appliance Er pee n 2 ChpPck wave cer iz oc 3 Rame deter CORRE ue Geos gears MOTS CRC Geile are rame 2513 Bum 7 5C aller 4 werd ere Gore hee aae na Drame 2 Manum ial ine aree i che whos apr 1e becs mue bi appliances n Er presume ik beharra 3 5 an wn 2 Cheol Bec 1 Check E rip High Fire i Sache G ami 7 be OFF far noel CET 2 Ceci E CH miri pipe k iriri Gore i enun es ip ipo appare 3 Check Opening Teraperaium pes CH einer autiel En pce ine 1 CHECI auri connect ErELEC ul 2 Corner Gee relie Fresnes E see core ici 3 Chpck Corner Eram 6 cored and gri appen 1 Check PETALE Be Cone JO 2 Chpck I7 pare ine tere mise ee ie m adn conte 2 N APS open epic tie luv LE E comes Ine enr 5 Chpck verd Er Press the Poser in eg ine Geo Code and reei ee T F ine proie ricas ae cnrs re iiir ir 1 Clicr DEW lesa ETE ue tecum 2 Comes E eine E
36. ing If adequate water level is not detected in the Boiler Heat Exchanger error Er 80 will occur Low water level error automatic reset CD If CH pressure is lower than 15 PSI check automatic Water feed valves to as sure they are operating properly Check to ensure automatic air vent operates properly Either there is no sufficient wa ter or there is air trapped in the system 2 Check freezing condition of the water replenishment line Visually check leakage around the internal piping 9 Ensure internal and DHW pumps are then check boiler operational Use a flat head screw driver to rotate near piping for a screw on the back side of the pump to ensure leaks the pump internal shaft is not stuck Check pump wiring to ensure proper connection 4 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting J4 Error code Meaning Cause When low water level circuit malfunctions error code Er 81 appears Low water level circuit error automatic reset Ensure the low water level sensor is properly connected If all things are normal please replace main controller WARNIN Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14
37. injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting Error code Meaning Cause Flame detector error When flame is detected before ignition Automatic reset error code 72 appears Ensure the appliance cover is secure Flame detection sensor can detect external light source and cause an error code Please check flame detector sensor s connecting line and ensure correct position as shown From more than DC 2 5V after ignition safety cut off will appear When setting before ignition is less than DC 2 5V Replace flame sensor 2 When setting after ignition is more than DC 2 5V Replace flame sensor Flame detector sensor setting Please check after closing front COVer 3 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting 92 Error code Meaning Cause Connection error between LCD display When communication with display panel and main controller panelis not stabilished for 10 minutes automatic reset Er 76 is displayed Ensure proper connection between display panel and main controller If all things are normal please replace main controller WARNIN Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 B Chapter 4 Troubleshoot
38. itial off shows up Default off sec to go back to initial status after confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel 56 Reset igniting cycles 30381 of Press current status button for 5 Turn the dial until 11 dl shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 11 01 is displayed Turn the dial to on status when Press dial button to save the setting Press current status button for a initial off shows up Default off sec to go back to initial status after confirmation Press current status button for 5 Turn the dial until 12 bt shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 12 08 is displayed Turn the dial to the desired setting Press dial button to save the setting Press current status button for a when initial O is displayed sec to go back to initial status after Range 0 120 min Default 0 min confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel CH anti cycling time Press current status button for 5 Turn the dial until 13 Ft shows secs while display is powered off to enter into installer setting mode Press dial button for a sec when 13 is displayed Press dial button to save the setting Turn the dial to the desired setting Press current
39. l Sub Heat Exchanger Stainless Steel Safety Devices Flame Rod Overheat Cut Off Device Gas Valve Operation Detector Exhaust Temperature High Limit Sensor Water Temperature High Limit Sensor LP 528 REV 8 01 14 7 Dimensions Chapter 1 Product Characteristics Description Diameter A Gas Connection Adapter 1 2 NPT 1 2 x 3 4 Bell Coupling Provided to Upsize Gas Line B CH supply Adapter return Adapter 1 D DHW outlet Adapter 3 4 E DHW inlet Adapter 3 4 5 Condensate Adapter 1 2 G Drain Adapter 1 2 H Exhaust Vent Connection Intake Pipe Connection 2 528 8 01 14 Chapter 1 Product Characteristics Components Description Lun ru quad gt 76 1 528 REV 8 01 14 9 Chapter 1 Product Characteristics Flow chart Space Heating Mode E 1 It m Fun Sabu Domestic Hot Water Mode Dormestc Hot Water Outlet e Coki Water Inlet ES Water li 4 Domestic Water 3 7 a du J 1 hiema Stage Tank Return LP 528 REV 8 01 14 Chapter 1 Product Characteristics 10 B ime chart f normal ignition FAN HH EH EHE EUH ELLE EL ELE EHE EL
40. l is repeated eight times in a row ignition sequence will stop Error will not disappear until display panel is manually reset gt If the flame sensing 2 Ensure gas valve viewing port is exces wiring is properly connected sively discolored loss of ia fame will occur 3 Check Gas Inlet Please check Pressure Range flame detector sensor s NG 1220 4 connecting line and 3 5 WC 14 WC 4 c ensure correct position LP as shown 3 5 WC 14 WC E 2 3 Please check the blockage of flue intake and exhaust pipes If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 72 Chapter 4 Troubleshooting Error code Meaning Cause During ignition trials if unit failed Ignition failure to ignite 10 times continuously manual reset error code 11 will appear Failure event If the unit failed to detect flame during ignition sequence pre purge time will exceed 10 sec and error code Er 11 will appear Check point Check separation distance Ne Check ignition after removing the flame rod A transformer and separation distance 1 8 electrical wires for proper connection Check Gas Inlet Please check Pressure Range flame detector sensor s NG NN connecting line and 3 5 WC 14 WC 4
41. layed Press dial button to save the setting Press current status button for a sec to go back to initial status after confirmation Press current status button for 5 secs while display is powered off to enter into installer setting mode Turn the dial to the desired setting when initial 0 is displayed 30 30 Default 0 Press dial button to save the setting Turn the dial until 8 FH shows up Press dial button for a sec when is displayed Press current status button for a sec to go back to initial status after confirmation LP 528 REV 8 01 14 29 Chapter 3 How to use control panel Fan Min RPM Adjustment Press current status button for 5 Turn the dial until 9 FL shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 9 FL is displayed Turn the dial to the desired setting Press dial button to save the setting Press current status button for a when initial 0 is displayed sec to go back to initial status after 30 30 Default 0 confirmation Press current status button for 5 Turn the dial until 10 dr shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 10 dr is displayed Turn the dial to on status when Press dial button to save the setting Press current status button for a in
42. loration of flame monitoring window Diagonostic Check the connection around the flame detection sensor Flame detection sensor red connector Flame detection sensor black connector 51515 5151 51 c CN7 LP 528 REV 8 01 14 Chapter 2 Components description 2n Check Point Description Part Gas Valve 7855P 034 Main PCB F Negative gas valve controls the regulation of gas and air imixture in the unction combustion system Gas leakage occurs Failure Event 2 Gas valve does not operate Unable to open close 3 Gas flow is not modulated Proportional gas valve Spark is not generated Effects 2 Operation of product is stopped Carbon monoxide exceeding the reference is discharged Check wiring for proper connection Diagonostic 2 Check the connection and mounting location Check resistance using a multi meter Color Wire Number Gas valve purple connector 2 LP 528 REV 8 01 14 29 Chapter 2 Components description Check Point Description Part BLDC Fan 7855P 025 Main PCB Supplies air and fuel to the burner amp Abnormal noise occurs at the fan Abnormal fan speed RPM 3 Poor connection Failure Event Abnormal combustion Abnormal noise occurs The unit does not operate Color Wire Number Check vent blockage Check BLDC fan wiring for proper connection 3 Check voltage range using a multi
43. n the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting Error code Meaning Cause When input voltage is lower than 90V 3V for 10 sec then error Er 36 will occur When Voltage is above Voltage error Automatic reset 100V then error will automatically reset Failure event Incoming voltage issue Check point Ensure manual power switch is properly connected Check the supply voltage at the manual power switch is within 102V 132 Vac if SO then it s main controller s malfunction and replace it Check whether power voltage is within the safety scope 5 seconds after power is supplied LP 528 REV 8 01 14 Chapter 4 Troubleshooting 82 Error code Meaning Cause If the electrical frequency is not in the range of 50 60 Hz 5Hz all the outputs will malfunction except for the fan post purge EEPROM error Manual reset Failure event Incoming frequency issue Check point When operating power frequency is Within 50 60 HZ 5Hz error will automatically reset LP 528 REV 8 01 14 83 Chapter 4 Troubleshooting Error code Meaning Cause When malfunctions EEPROM error error 39 occurs and all of the outputs Manual reset will stop except fan post purge Replace the main controller Failure to turn the power off to the appliance bef
44. ndensate Blockage APS wirring connection Check the hose for blockage or kinking 3 Check the condensate discharge line Check Condensate Blockage APS resistance using a multi meter Color Wire Number Condensate Blockage Switch red connector 8 Coll al el al all alc LP 528 REV 8 01 14 25 Chapter 2 Components description Check Point Description Part DHW Flow Sensor 7855P 083 Main PCB CS This sensor detects water flow more than 0 5 GPM through DHW loop Failure Event Water flow is not detected Domestic hot water set 7 is not achieved Error ErorCode Diaaonostic Restart the appliance 2 Visual inspection check flow sensor wiring for proper connection Ground blue Connector Color Wire Number Q Flow ae Connector 5 3 DC 5V red Connector 5556 CN3 LP 528 REV 8 01 14 Chapter 2 Components description 26 9 m Check Point Description Part Ignition Transfomer 7855P 007 Main PCB Generates sparks energy to ignite the fuel Failure Event Sparks energy is not generated The unit does not ignite Error ErorCode 0 CC 1 10 Check wiring for proper connection Color Wire Number SE Igniter red connector LP 528 REV 8 01 14 24 Chapter 2 Components description wu Check Point Description Part Flame Detection Sensor 7855P 031 Main PCB Check the disco
45. ng 86 Error code Meaning Cause Jumped Wire Disconnected Error Er 42 will appear if wire Manual reset is disconnected Ensure the jumper wire is properly connected on the control board 2 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury death LP 528 REV 8 01 14 B Chapter 4 Troubleshooting Error code Meaning Cause If burner plate temperature is higher than the switch high limit setting 392 F error code 43 will appear Burner Plate overheating protection switch open Manual reset Check point CD Check Burner Plate for distortion or burn marks If plate shows signs of overheating replace entire burner plate assembly 2 Check burner overheat switch connections Ensure all wire leads are secure After removing the burner overheat switch from the burner plate measured resistance using multi meter If the resistance value is 00 replace the switch 3 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting 88 Error code Meaning Cause Blower operation error Blower is disconnected or automatic reset malfunctioning Check vent blockage Check whether BLDC fan is operating normally
46. nts Replacement Instructions Failure to turn the power and gas off to the appliance and ensure the unit is cool before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 7 Repair Part Diagram 104 1 Cabinet Replacement Parts LP 528 REV 8 01 14 105 Chapter 7 Repair Part Diagram SE Re ae aS MS __ ra 2 Ont ter Em LP 528 REV 8 01 14 Chapter 6 Repair Parts Diagram 106 2 Combustion System Replacement Parts LP 528 REV 8 01 14 107 Chapter 7 Repair Part Diagram PART DESCRIPTION LP 528 REV 8 01 14 108 Memo LP 528 REV 8 01 14 109 Memo LP 528 REV 8 01 14 110 Memo LP 528 REV 8 01 14
47. o back to the initial status i c Current return water temperature After 0 ot has been displayed by status will be displayed 100 F pressing current status button for 5 Secs turn the dial until it shows Press dial button for 1 sec when shows up Press current status button during mode to go back to the initial status LP 528 REV 8 01 14 Press dial button for a sec again to go back to the previous mode Chapter 3 How to use control panel 44 Fan speed RPM mE oQ O Fan RPM current status will be displayed After 0 ot has been displayed by Check RPM by pressing dial pressing current status button for 5 button for 1 sec when c Fr shows up secs turn the dial until it shows Press current status button with c Fr Press dial button for a sec again to id mode to go back to the initial status go back to c Fr mode NOTE The Control System will not allow the changes if Lock Mode is activated Lock Mode will have to be turned off before making further changes After 0 ot has been displayed by Press dial button for 1 sec when Turn the dial until nen Status off pressing current status button for 5 d Lc shows up mode turns into on Secs turn the dial until it shows d Lc LJ Press dial button for a sec again Press current status button
48. or Code 6 lt 13 Error Code 20 14 Error Code 28 15 Error Code 299 76 EmorCode 30 Ha T7 Error Code 32 78 Error Code 33 79 Error Code 35 errre 80 ErrorCode 36 jj 81 Error Code 37 j 82 Error Code 3B ees 83 Error Code 40 eee 84 EmorCode41 85 Error Code429 j 86 Error Code 43 e 87 Error Code61 eee 88 Error Code66 eesssssesees 89 Error Code68 e 90 Error Code 79 91 Error Code 76 92 Error Code 80 93 Error Code 814 94 Error Code 85 aen 96 Error Code 94 96 Chapter 5 Replacement instructions Blow Assembly 97 Gas Valve 98 Flow Sensor 77 7 4 4 00 Electronic Mixing Valve 2222222777 99 APS Air Pressure Switch 100 Inter Primary CH Circulation Pump 100 Internal DHW Storage Tank e 101 Flame Detection Sensor e 101 Main Controller 102 Ignition Transformer 103 Chapter 6 Components diagram Repair Parts Diagram 104 Memo 108 D LP 528 REV 8 01 14 Chapter 1 Product Characteristics Specification Model Name EFTC 140F MAX 140 000 Btu h Gas Input Rate MIN 28 000 Btu h AFUE 93 2 35
49. ore repair could result in serious injury or death LP 528 REV 8 01 14 84 Chapter 4 Troubleshooting Error code Meaning Cause When gas leakage is detected Gas leakage during operation error Manual reset code Er 40 will appear Follow instruction on first page of installation manual Check leakage by using soapy water on all related gas pipe connection and gas valve to determine source of leak Once determined repair leak and reassemble Check condition of O rings and gaskets and replace them if damaged Q If leaks are not present on the gas piping or valve Start unit and monitor for leaks around blower assembly and connection to determine source of leaks 3 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury death LP 528 REV 8 01 14 ee Chapter 4 Troubleshooting Error code Meaning Cause When standard fan speed is exceeded during combustion error code 41 will appear Excess fan speed detected Manual reset 7 Check whether error code disappears after turning OFF and ON the power Check vent blockage Check whether BLDC fan is operating normally If all things are normal please replace main controller RNIN Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooti
50. p is operational Use a flat head screw driver to rotate a screw on the back side of the pump to ensure the pump internal shaft is not stuck Check pump wiring to ensure proper connection WARNIN Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting 74 Error code Meaning Cause Condensate air pressure switch is open manual reset When condensate outlet blockages occurs error code Er 20 will appear Check Condensate discharging line Check APS line for proper connection LP 528 REV 8 01 14 Chapter 4 Troubleshooting CH supply overheating If CH supply overheating sensor open or short sensor is shorted manual reset or disconnected Er 28 is displayed Failure event If connection of the CH supply over heating sensor connected to heat exchanger is shorted or disconnected Er 28 is displayed Check point Check whether over heating switch is shorted or disconnected Check CH supply over heating sensor condition Connect multi meter with over heating switch s sock et and measure the value If value shows 0Q it s a sensor s malfunction so replace it LP 528 REV 8 01 14 Chapter 4 Troubleshooting 76 Error code Meaning Cause APS open manual reset When exhaust vent blockages occurs error code 29 will appear In case of vent blockage the air pressure in the comb
51. ption Flow chart Time chart Operation flow chart Wiring diagram Connector function Main Control Board Temperature sensors Burner Overheat Switch Water level detection sensor Detection sensor Jumped wire connection Air Pressure switch Condensate Blockage APS Flow sensor Ignition transformer Flame Detection Sensor Gas valve BLDC Fan Burner assembly Fire Tube Heat exchanger Condensate trap Internal DHW storage tank Internal CH DHW circulation pumps DHW Mixing Valve Function explanation Contol panel LCD Specification Control Panel Mode DHW Temperature Control DHW Temperature Control CH Supply water temperature control eee eee eee eee 9 6 6 9 6 9 Outdoor temperature display Water flow rate GPM or LPM CH Return water temperature Fan Speed RPM Program Lock mode CH Supply water temperature DHW Outlet Water Temperature Exhaust Gas Temperature Internal storage tank water temperature Overheat temperature sensor View supply power time
52. ustion system exceeds tthe APS setting and Er 29 is displayed Check APS hose check hose damages Check APS wiring to assure proper connection 3 Please check the blockage of flue exhaust pipe 4 If the above conditions are normal please replace APS If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chap ter 4 Troubleshooting _ Error code Meaning Cause Storage tank temperature When storage tank temperature sensor error sensor malfunctions or automatic reset gets disconnected error code Er 30 will appear Failure event Storage tank temperature sensor malfunction Check point Ensure the storage tank temperature sensor is properly connected Check storage tank temperature sensor condition When the resistance value measured with a multimeter is 00 replace storage tank temperature sensor 3 If all things are normal please replace main controller Failure to turn the power off to the appliance before repair could result in serious injury or death LP 528 REV 8 01 14 Chapter 4 Troubleshooting 78 Error code Meaning Cause When DHW outlet temperature sensor malfunctions or gets disconnected error code Er 32 will appear DHW outlet temperature sensor error automatic reset Ensure the DHW
53. y tempera Press dial button to save the setting Press current status button fora ture 9 F 180 F Default 180 F sec to go back to initial status after confirmation LP 528 REV 8 01 14 59 Chapter 3 How to use control panel Minimun CH Supply tempature Press current status button for 5 Turn the dial until 17 01 shows up secs while display is powered off to enter into installer setting mode Press dial button for a sec when 17 01 is displayed Turn the dial to the desired setting when initial seing Is displayed Brass dia bultonto save the Press current status button for a Range 86 F maximum CH sup setting sec to go back to initial status after ply temperature 9 F Default 86 F confirmation Press current status button for 5 Turn the dial until 18 dH shows up Diese dial button to when secs while display is powered off to 48 dH is displaved enter into installer setting mode Turn the dial to the desired setting when initial setting is displayed Press dial button to save the Press current status button for a Range 120 F 140 F setting sec to go back to initial status after Default 140 F confirmation LP 528 REV 8 01 14 Chapter 3 How to use control panel 60 capacity Press current status button for 5 Turn the dial until 19 cb shows secs while display is powered off to enter into installer setting mode
54. zles Size Color Wire Number Temperature switch burner upper 392 F 200 C orange Connector 7 09 6 AA GY 2 03 04105 16 CN11 LP 528 REV 8 01 14 Chapter 2 Components description 20 Water Level Detection Sensor Description Part 7855P 029 Check Point CN11 Function This sensor detects water level inside of heat exchanger to prevent dry fire Water is not detected at proper level Boiler operation is interrupted ER Dindonostic Visual inspection wiring connection 9 Check pressure gauge minimum CH pressure is 15 PSI Color Wire Number Water level sensor red green Connector 2 00 9 9 9 e 9 yer agr of Gl 6411 Ic CN11 LP 528 REV 8 01 14 Chapter 2 Components description Gas Leak Detection Sensor Check Point 7850P 093 Main PCB Function This sensor shutsdown the unit if a gas leak is detected Failure Event Gas leak detection sensor is not operating correctly Description Part N A Effects Risk of explosion and personal injury Follow instruction on first page of installation manual Check for leakage Diagonostic around the gas valve and gas piping by using soapy water Check the burner assembly Color Wire Number N A m LP 528 REV 8 01 14 Chapter 2 Components description 22 20 Jumped Wire Connection 7850P Check Point Function This part is used to jump out cir

Service Manual

Contents

Download Pdf Manuals

Related Search

Related Contents