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Worcester CDi Combi L.P.G, Service Booklet, Page: 31 / 80

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Worcester CDi Combi L.P.G Service Booklet Download Page 31

Supplied By www.heating spares.co  Tel. 0161 620 6677

RECTIFYING FAULTS

8 716 115 748 (2009/09)

31

A6

 

and fault indicator LED are flashing. Appliance NOT available for demands.

External under floor heating thermostat defective.

Check

Action

1.

B

Power OFF the appliance.

B

Disconnect the appliance electrical 
connection.

Check if the external under floor 
heating thermostat is connected on 
ST8/8-9?

yes:

go to 2

no:

B

Ensure that the link is securely connected to ST8/8-9

B

Reconnect the appliance electrical connection.

B

Power ON the appliance.

A6? go to 4

2.

B

Disconnect lead to thermostat.

Check the thermostat for continuity?

yes:

B

Reconnect lead to thermostat.

go to 3

no:

B

Change thermostat.

B

Reconnect the lead to thermostat.

B

Reconnect the appliance electrical connection.

B

Turn the appliance ON.

A6? go to 4

3

B

Unplug the harness connector that 
connects the thermostat to the 
control board.

Check the harness for continuity?

yes

A6? go to 4

no

B

Change or repair wiring to the thermostat.

B

Reconnect the appliance electrical connection.

B

Power ON the appliance.

A6? go to 4

4

The control board is damaged.

B

Reconnect the appliance electrical connection.

B

Power ON the appliance.

B

Make a note of the altered service function settings.

B

Power OFF the appliance.

B

Disconnect the appliance electrical connections.

B

Change the control board.

B

Reconnect the appliance electrical connection.

B

Turn the appliance ON.

B

Restore the service settings previously noted.

Tab. 15 A6 Error codes

Summary of Contents for CDi Combi L.P.G

Page 1: ...NSTAR CDi RANGE 8716115748 00 1Wo FOR CENTRAL HEATING SYSTEMS AND INDIRECT FED DOMESTIC HOT WATER 8 716 115 748 2009 09 This Service booklet covers the following boiler ranges CDi Combi N G CDi Combi L P G CDi System N G CDi System L P G CDi Regular N G CDi Regular L P G Highflow CDi N G Highflow CDi L P G FS CDi Regular N G FS CDi Regular L P G ...

Page 2: ... boiler 18 5 1 First service level 18 5 2 Second service level 19 5 3 Explanation of service functions 19 6 Boiler service functions CDi Highflow CDi FS CDi Regular 23 6 1 First service level 23 6 2 Second service level 24 6 3 Explanation of service functions 25 7 Rectifying faults 27 7 1 Indication of faults 27 7 2 Summary 27 7 3 Notes on using the fault code tables 28 7 4 Error codes on the disp...

Page 3: ...ny combustible materials paper thinners paint etc inside or close to the appliance Chemically aggressive substances such as halogenated hydrocarbons The presence of halogenated hydrocarbons in the combustion air causes surface corrosion on affected metals In order to limit the damage the source of the air contamination must be located and sealed off If this is not possible the combustion air must ...

Page 4: ...ater in 11 CH return 12 Charging link assembly 13 Gas inlet connection 22 mm compression 14 Cover for external wiring connections 15 Control panel in service position 16 Access cover for transformer PCB 17 DHW out 18 CH flow 19 Trap syphon outlet connection 22 mm plastic pipe 20 Inlet pressure test point 21 Trap syphon 22 Gas valve 23 DHW temperature sensor 24 Air gas adjustment screw 25 Testing p...

Page 5: ...ation valve 43 DHW out connection 44 Cold water in connection 45 CH return connection to isolation valve 46 Diverter valve housing 47 Pressure relief valve 48 Compact hydraulic mounting screw 2 to boiler 49 CH temperature control 50 Mains on off indicator diagnostic light blue 51 DHW temperature control 52 Central heating boost button 53 Service button 54 Burner on indicator light green 55 Master ...

Page 6: ... 9 Central Heating return 10 Gas inlet connection 22mm compression 11 Cover for external wiring connections 12 Control panel in service position 13 Access cover for transformer and PCB 14 Central Heating flow 15 Trap Syphon outlet connector 22mm plastic pipe 16 Inlet pressure test point 17 Trap Syphon 18 Gas valve 19 Air Gas adjustment screw 20 Test point for fan pressure 21 Fan 22 Primary sensor ...

Page 7: ...tral Heating return connection to service valve 34 Drain point 35 Internal bypass within plastic moulding 36 Central Heating flow connection to service valve 37 System pressure gauge 38 Display 39 Fault reset button 40 ECO button 41 Holiday button 42 DHW temperature control 43 Power ON OFF indicator diagnostic light blue 44 Central Heating temperature control 45 Position for option controller 46 C...

Page 8: ...6677 LAYOUT OF BOILER 8 716 115 748 2009 09 8 2 3 CDi REGULAR BOILERS Fig 5 The diagram shows the controls in the service position with the mantle and fascia panel removed 1 5 6 7 11 12 13 14 16 18 19 20 21 15 17 22 23 10 8 9 2 3 4 8716115748 05 1Wo ...

Page 9: ...external wiring connections 12 Control panel in service position 13 Access cover for transformer PCB 14 CH flow 15 Inlet pressure test point 16 Trap syphon 17 Gas valve 18 Air gas adjustment screw 19 Testing point for fan pressure 20 Fan 21 Primary sensor 22 Auto air vent 23 Removable top case panel for servicing 24 Display 25 Fault reset button 26 Non functional on CDi Regular 27 Holiday button 2...

Page 10: ...frame 19 CH return isolating valve 20 Mains water inlet isolating valve 21 Gas isolating valve 22 DHW outlet 23 CH flow isolating valve 24 DHW sensor 25 Boiler tank drain connection point for filling link 26 Flow turbine 27 Filling link isolating valve 28 DHW heat exchanger 29 Tank overheat thermostat 30 Tank temperature sensor 31 Control panel 32 Display 33 System pressure gauge 34 Reset button 3...

Page 11: ...utlet blanking covers 14 Ignition electrodes flame sensing electrode 15 Heat cell high limit thermostat 16 Inner case 17 Gas valve 18 Condensate syphon 19 Mounting frame 20 Return connector 21 Gas isolating valve 22 Flow connector 23 Runner wheel 24 Condensate pump assembly 25 Air Gas adjustment screw sealed 26 Heat cell 27 Primary sensor 28 Flow pipe 29 Auto air vent 30 Heatronic III series contr...

Page 12: ... two letters followed by two digits twice version number the value is displayed in 3 steps 1 two first letters 2 two first digits 3 two last digits e g CF 10 20 Tab 2 Display messages Special messages Description Key acknowledgement after pressing one button except reset button Key acknowledgement after pressing two buttons simultaneously Key acknowledgement after pressing button longer than 3 sec...

Page 13: ...ctive 3 4 3 Exit service function service level without storing B Press the button to exit the service function without storing After releasing the button goes out B Press the button to exit service level After releasing the button goes out The display shows the flow temperature 3 5 Second service level 3 5 1 Display the value of the service function B Press the button for approx 10 seconds the di...

Page 14: ...CH control knob on the right and adjust maximum heat output the display shows alternatively the CH flow temperature and or B Turn the CH control knob on the left and adjust minimum heat output the display shows alternatively the CH flow temperature and B Press the button to exit the function After releasing the button goes out 3 8 RESET THE APPLIANCE B Press the reset button for 3 seconds and rele...

Page 15: ...9 0 999 two dashes followed by two digits twice code plug number the value is displayed in 3 steps 1 two dashes 2 two first digits 3 two last digits e g 10 04 1000 9999 two letters followed by two digits twice version number the value is displayed in 3 steps 1 two first letters 2 two first digits 3 two last digits e g CF 10 20 Tab 4 Display messages Special messages Description Key acknowledgement...

Page 16: ...ds to select the value B Press the button longer than 4 seconds until appears on the display After releasing the button goes out and the value is stored The first service level is active 4 4 3 Exit service function service level without storing B Press the button to exit the service function without storing After releasing the button goes out B Press the button to exit service level After releasin...

Page 17: ...he service function 8 E second service level value 0 and store it The appliance re starts with factory settings see also section 3 1 4 7 SELECT MAX OR MIN HEAT OUTPUT B Press the button for approximately 10 seconds the display shows When the button will light up orange release it B Turn the CH control knob on the right and adjust maximum heat output the display shows alternatively the CH flow temp...

Page 18: ...5 88 35 88 C 88 C 2 C Air purge mode burner keeps off while air purge mode is on 00 02 0 off 1 on automatic deactivation on for 8 minutes then off 2 permanent on 01 2 F Operating mode 00 02 0 Normal 1 Minimal for 15 min 2 Maximal for 15 min 00 3 b Anti cycle time 00 15 0 15 min 03 min 3 C Anti cycle flow temperature differen tial 00 30 0 30 K Note 1K 1 C 10 K 3 E Pre heat cycle time hot water comb...

Page 19: ...ump switches between the various pump speeds so as to reproduce the characteristic curve selected Changing the pump characteristic can be helpful if a lower pressure difference will guarantee the necessary circulation on the basis of the system dimensions and pump characteristic Description Display Range adjustable from to Description Reset Value after parameter reset 8 A Software version CF read ...

Page 20: ...er function 1 d Map pump step heating is active 1 D MAP PUMP STEP HEATING combi system only This service function corresponds to the pump speed switch used on conventional heating pumps However the setting is only active if function 1 C Pump map heating is set to 0 The factory setting is 1 d Map pump step heating 7 Fig 14 Characteristics 2 7 Characteristics H Pressure Q Water circulation rate In o...

Page 21: ...e display shows 0 Minimum mode the appliance runs constantly at minimum output The display shows 1 The 2 digit display alternates between the CH flow temperature and After 15 min the minimal mode changes to normal mode Maximum mode the appliance runs constantly at maximum output The display shows 2 The 2 digit display alternates between the CH flow temperature and After 15 min the maximal mode cha...

Page 22: ...the timer DT20 Right digit is DHW demand hot water mode will be activated according to the programmer commands 7 A FAULT INDICATOR LED ON OFF The fault indicator LED flashes in case of error even when its setting is off 0 5 3 2 SECOND SERVICE LEVEL 8 A SOFTWARE VERSION The version number of the software is displayed 8 B CODE PLUG The 4 digit part number of the code plug digits no 7 up to 10 of ord...

Page 23: ... off 1 on automatic deactivation on for 8 minutes then off 2 permanent on 01 2 F Operating mode 00 02 0 Normal 1 Minimal for 15 min 2 Maximal for 15 min 00 3 b Anti cycle time 00 15 0 15 min 03 min 3 C Anti cycle flow temperature differential 00 30 0 30 K Note 1K 1 C 10 K 3 F Burner off after DHW demand hot water combi only 00 30 0 30 min 0 10sec 01 min 4 F Syphon fill programme 00 01 0 off 1 on b...

Page 24: ...on CF read only 8 b Code plug number 1000 4000 corresponds to digits 7 to 10 of order number for example 8 714 411 062 0 read only 8 E Reset all parameters 00 0 must be stored in order to set all parameters to factory settings 00 8 F Permanent ignition 00 01 0 off 1 on Do not run for more than 2 minutes 00 9 A Operation mode permanent 00 02 0 normal 1 min 2 max 00 9 b Actual fan speed Hz read only...

Page 25: ...CH flow temperature and After 15 min the maximal mode changes to normal mode 3 B ANTI CYCLE TIME The anti cycle time is factory set to 3 minutes The shortest possible anti cycle time is 1 minute recommended for single pipe and hot air heating systems If the setting 0 is entered the anti cycle time is inactive B Enter the anti cycle time on the commissioning record enclosed with the appliance 3 C A...

Page 26: ...he status of channel 2 of the timer DT20 Right digit is DHW demand hot water mode will be activated according to the programmer commands 6 3 2 SECOND SERVICE LEVEL 8 A SOFTWARE VERSION The version number of the software is displayed 8 B CODE PLUG The 4 digit part number of the code plug digits 7 to 10 of order number is indicated The code plug determines the appliance functions If the appliance is...

Page 27: ...2 33 b1 2 35 C6 2 36 CC 2 37 d5 CDi HF FS 2 38 d6 CDi HF only 2 39 E2 2 40 E9 4 41 EA 4 44 F0 2 4 48 F7 4 49 FA 4 50 Fd 4 51 Appliance faults Page Excessive burner noise rumbling noises 50 Flow noises 50 Heating up of last radiators in system too slow 51 Flue gas levels incorrect CO level too high 51 Ignition too harsh ignition poor 52 Condensation in the flue pipe 53 Inadequate hot water outlet t...

Page 28: ...is clear by testing the CO2 level If the appliance is locked reset button and the fault indicator LED are flashing press the reset button If the fault has been rectified the appliance will then start up without indicating a fault and the fault isolation procedure is complete If the fault is still present after performing the reset action and if necessary restarting the appliance move on to the nex...

Page 29: ... no go to 2 2 Pump seized or sticking yes Free release pump no go to 3 3 Audible bearing damage on pump yes B Power OFF the appliance B Disconnect the boiler electrical connection B Drain appliance B Change the pump see Installation Instructions B Fill system bleed and repressurise see Installation Instructions B Reconnect the boiler electrical connection B Turn ON the appliance no go to 4 4 Activ...

Page 30: ...cable side Does the value match the one in table 43 yes B Reconnect the appliance electrical connections B Turn ON the appliance B Make a note of the altered service function settings B Power OFF the appliance B Disconnect the appliance electrical connections B Change the PCB control board B Reconnect the appliance B Turn the appliance ON B Restore the service setting noted previously no go to 3 3...

Page 31: ...ead to thermostat go to 3 no B Change thermostat B Reconnect the lead to thermostat B Reconnect the appliance electrical connection B Turn the appliance ON A6 go to 4 3 B Unplug the harness connector that connects the thermostat to the control board Check the harness for continuity yes A6 go to 4 no B Change or repair wiring to the thermostat B Reconnect the appliance electrical connection B Power...

Page 32: ... table 38 page 71 yes B Connect the boiler electrical connection B Switch ON the appliance B Make a note of the altered service function settings see table 6 on page 18 in order to keep the altered values B Switch OFF the appliance B Disconnect the boiler power connection B Change PCB control board B Reconnect the appliance power connection B Switch ON the appliance B Restore service settings prev...

Page 33: ... are installed B Check the wiring between bus modules and the branch box B Ensure that the B terminals are employed B Switch off the appliance B Disconnect the appliance power B Is there continuity yes A8 go to 3 no B Cable between bus module and branch box is defective B Repair or replace cable B Reconnect appliance power B Switch on appliance A8 go to 3 3 Where multiple bus modules are installed...

Page 34: ...iance A8 go to 5 6 The PCB control board is faulty B Reconnect electrical power B Switch on appliance B Make a note of the service function settings B Switch off appliance B Disconnect electrical power B Change PCB control board B Reconnect electrical power B Switch on appliance B Restore service settings noted previously A8and fault indicator LED are flashing Bus communication to the programmer i...

Page 35: ... service function yes go to 2 no go to 3 2 Code plug loose incorrect or defective B Switch OFF the appliance B Fit code plug correctly making sure code number is correct see Appendix B Switch ON the appliance b1 go to 3 3 The PCB is damaged B Make a note of the altered service function settings see table 6 on page 18 in order to keep the altered values B Switch OFF the appliance B Disconnect the b...

Page 36: ...easure the fan lead for continuity Is there continuity for each one of the cores yes go to 4 no B Replace fan cable B Reconnect the appliance power connection B Switch ON the appliance C6 go to 4 4 Fan defective yes B Switch OFF the appliance B Disconnect the boiler power connection B Un plug the connection wire B Replace fan B Push on the connection wire B Reconnect the appliance power connection...

Page 37: ...ensor Does the value match that in table 44 yes go to 3 no B Replace the outside temperature sensors B Power ON the appliance CC go to 3 3 B Power OFF the appliance B Disconnect the boiler mains connection B Disconnect the outside temperature sensors at connec tors A and F on the PCB Check for continuity is there continuity yes CC go to 4 no B Replace the cable B Reconnect the boiler electrical ma...

Page 38: ... Is there continuity yes B Reconnect plug on condensate pump go to 3 no B Change condensate pump B Reconnect condensate pump B Reconnect the boiler electrical mains connection B Power ON the appliance d5 go to 4 3 B unplug connector ST19 Test harness for continuity Is there continuity yes d5 go to 4 no B Change or fix wiring to condensate pump B Reconnect the boiler electrical mains connection B P...

Page 39: ...n thermostat go to 3 no B Change thermostat B Reconnect lead on thermostat B Reconnect the boiler electrical mains connection B Power ON the appliance d6 go to 4 3 B unplug connector ST9 Test harness for continuity Is there continuity yes d6 go to 4 no B Change or fix wiring to thermostat B Reconnect the boiler electrical mains connection B Power ON the appliance d6 go to 4 4 The PCB control board...

Page 40: ...cal connection B Switch ON the appliance B Make a note of the altered service function settings see table 6 on page 18 in order to keep the altered values B Switch OFF the appliance B Disconnect the boiler power connection B Change PCB control board B Reconnect the appliance power connection B Switch ON the appliance B Restore service settings previously noted down no go to 3 3 B Un plug NTC senso...

Page 41: ... B Press the reset button for 3 seconds and release it After releasing the appliance re starts E9 go to 4 4 Is the pump seized yes B Free release the pump If pump won t start B Switch OFF the appliance B Disconnect the boiler power connection B Drain appliance B Change the pump see Installation Instructions B Fill system vent and re pressurise see installation instructions B Reconnect the applianc...

Page 42: ...or 3 seconds and release it After releasing the appliance re starts E9 go to 6 8 B Disconnect the boiler power connection B Unplug connector of harness that connects the limiters to PCB from control board Test harness including the two limiters for continuity Resistance small yes Reconnect connector go to 7 no Harness defective B Repair or replace the harness B Reconnect the appliance power connec...

Page 43: ...e settings B Switch OFF the appliance B Disconnect the boiler power connection B Change PCB control board B Reconnect the appliance power connection B Switch ON the appliance B Restore service settings previously noted down E9and button reset and fault indicator LED are flashing Safety temperature circuit has tripped Check Action Tab 24 E9 Error codes ...

Page 44: ...cording to technical data yes B Is correct code plug fitted If not fit correct code plug see Appendix B Press the reset button for 3 seconds and release it After releasing the appliance re starts EA go to 5 no B Check working pressure at appliance to eliminate pipe work problems B Check pressure at the building supply pressure regulator inform gas company if outside correct range B Press the reset...

Page 45: ...B Close air gas manifold see installation instructions go to 8 no B Insert diaphragm in the fan intake tube as per installation instructions so that the flaps open upwards B Close air gas manifold see installation instructions EA go to 8 8 Check the gas valve B Switch OFF the appliance B Un plug the connectors from the gas valve B Measure the gas valve coils I and II electrical resistance R 164 40...

Page 46: ...ermanent ignition at the electrodes without gas Is it OK yes B Select the value 0 and store Exit the service function go to 12 no B Select the value 0 and store Exit the service function go to 15 12 Ignition cable connected to ignition electrodes yes go to 13 no B Reconnect lead B Press the reset button for 3 seconds and release it After releasing the appliance re starts EA go to 13 13 Ignition ca...

Page 47: ...6 16 B Switch OFF the appliance B Disconnect the boiler power connection B Check if the 20 pin connector lead assembly is damaged B Change the connector lead assembly B Reconnect the appliance power connection B Switch ON the appliance B Press the reset button for 3 seconds and release it After releasing the appliance re starts EA go to 17 17 The PCB is damaged B Make a note of the altered service...

Page 48: ...pliance re starts B Initiate demand for heat by pressing button for 10 seconds and then press again after 30 seconds to cancel B Initiate two more demands for heat as above F0 go to 2 no go to 2 2 The PCB is damaged B Make a note of the altered service settings B Switch OFF the appliance B Disconnect the boiler power connection B Change PCB control board B Reconnect the appliance power connection ...

Page 49: ... starts F7 go to 2 no B Refit electrode assembly B Switch ON the appliance B Press the reset button for 3 seconds and release it After releasing the appliance re starts F7 go to 2 2 Problem with flue B Check CO2 level in combustion air in the flue with outer casing fitted Is CO2 level above 0 2 yes There are flue gases in the combustion air B Check flue and repair or replace if necessary F7 go to ...

Page 50: ...on air in the flue with outer casing fit ted Is CO2 level above 0 2 yes There are flue gases in the combustion air B Check flue clean if necessary B Press the reset button for 3 seconds and release it After releasing the appliance re starts FA go to 4 no go to 4 4 Is the gas valve damaged yes B Switch OFF the appliance B Disconnect the boiler power connection B Turn off gas valve B Change the gas ...

Page 51: ...er appliance switches off flame is detected Check Action Tab 28 FA Error codes Fdand RESET button and fault indicator LED are flashing Reset button pressed inadvertently Check Action 1 reset button flashing B Press the reset button for 3 seconds and release it After releasing the appliance re starts Fd go to 2 2 The PCB is damaged B Make a note of the altered service settings see table 6 on page 1...

Page 52: ...rnal air flue channel leaking or blocked B Check control pressure at test point as stated in installation instructions If fan fails the test B Open up heat exchanger and inspect B Remove silencer flue duct and air flow limit B Open trap and inspect Air channels dirty clogged seals defective or not correctly fitted yes B Repair or replace components B Grease seal before fitting Ensure it is fitted ...

Page 53: ...B De commission appliance Natural gas models B Notify gas utility 3 Problem with flue B Check CO2 level in combustion air in the flue with outer casing fitted Is CO2 level above 0 2 yes There is flue gas in the combustion air B Check flue and repair or replace if necessary Flue gas levels incorrect go to 4 no go to 4 4 Flue gas CO2 levels measured at min and max load do not match specified levels ...

Page 54: ...control panel B Switch ON the appliance B Press the reset button for 3 seconds and release it After releasing the appliance re starts Ignition poor go to 4 4 Is the ignition cable damaged yes B Switch OFF the appliance B Change the ignition cable B Switch ON the appliance B Press the reset button for 3 seconds and release it After releasing the appliance re starts Ignition poor go to 5 no go to 5 ...

Page 55: ...or O2 level yes B Adjust CO2 level as per installation instructions Ignition poor go to 10 no go to 10 10 Burner incorrectly fitted or defective B Switch OFF the appliance B Turn off gas valve B Remove burner Cover fittings loose or seal defective or incorrectly fitted or burner defective B Replace burner and seal if necessary B Ensure seal is fitted in correct position B Open the gas valve B Swit...

Page 56: ...rminal 3 on Heatronic 230 V AC yes B Switch OFF the appliance B Disconnect the boiler power connection B Change the lead assembly B Reconnect the appliance power connection B Switch ON the appliance no B Make a note of the altered service settings see table 6 on page 18 B Switch OFF the appliance B Disconnect the boiler power connection B Change PCB control board B Reconnect the appliance power co...

Page 57: ...es B Vent radiators manually Set room temperature not reached DT10 DT20 Check Action Set room temperature exceeded by large amount Check Action 1 Do radiators get too hot yes B Decrease setting of Heating control go to 2 no go to 2 2 Bad choice of location for program mer e g outside wall near window in draught etc yes B Select better installation location or B Fit external room thermostat go to 3...

Page 58: ...S communication fault 200 Boiler no longer reporting Check BUS device BUS connection and repair circuit break if necessary 201 Incorrect BUS subscriber con nected Identify and replace incorrect BUS device Fault 02 Internal fault 42 Code switch on IPM in intermedi ate position Switch system off and correct coding 43 Coding switch position has been changed since initialisation phase 100 ISM not resp...

Page 59: ...sor and remedy interruption if necessary Fault 19 Unable to save parameter settings 202 BUS device is configured but not available at present Check system layout check system configuration modify if necessary and set parameter again Fault 20 System configuration invalid 193 Invalid coding in remote control for the heating circuit In combination with FW 100 only coding 1 is possible in the remote c...

Page 60: ...nsors T1 and T2 reversed Check the temperature sensors and swap the connections if necessary Fault 53 Temperature sensor fitted in wrong location 125 128 Collector temperature sensor T1 fitted on collector array inlet Fit collector temperature sensor T1 close to collector array outlet Fault 54 Temperature for thermal disinfection not reached in solar cylinder 145 Maximum temperature for solar cyli...

Page 61: ... Set mass flow in solar system correctly e g increase decrease pump speed and if necessary open or close flow restrictor more on solar station Guide figure 20 40 kg m2 of collector area per hour Check setting for collector area type and climate zone on Solar optimisation menu 202 Mass flow rate in solar system for collector group 1 is too low Information displayed Æ Pos 1 3 and 4 in fig 16 Text Co...

Page 62: ...e location e g external wall near windows in a draught Select a better location for FW 100 and ask your heating engineer to reposition it Room temperature offset set incorrectly Perform adjustment to room temperature sensor and correct Room temperature offset Excessive room temperature fluctuations Temporary influence of external heat on the room e g through solar radiation lighting TV fireplace e...

Page 63: ...Fig 17 Text Code Cause Remedy Fault 01 BUS communication fault 200 Boiler no longer reporting Check BUS device BUS connection and repair circuit break if necessary 201 Incorrect BUS subscriber connected Identify and replace incorrect BUS device Fault 02 Internal fault 40 Incorrect module type detected Replace IPM 100 ISM not responding Check BUS connection and repair circuit break if necessary Fau...

Page 64: ...ck system configuration for heating circuit x Fault 14 System configuration incompatible BUS device DHW controlled by boiler IPM control of DHW has no effect 117 Incompatible BUS device Identify incompatible BUS device and remove from the system Fault 14 System configuration incompatible BUS device IPM for cylinder must be set to identification 3 or higher 118 119 Incompatible BUS device Set IPM f...

Page 65: ...d Check the temperature sensors and swap the connections if necessary Fault 53 Temperature sensor fitted in wrong location 125 Collector temperature sensor T1 fitted on collector array inlet Fit collector temperature sensor T1 close to collector array outlet Fault 54 Temperature for thermal disinfection not reached in solar cylinder 145 Maximum temperature for solar cylinder too low Set higher max...

Page 66: ...Set mass flow in solar system correctly e g increase decrease pump speed and if necessary open or close flow restrictor more on solar station Guide figure 20 40 kg m2 of collector area per hour Check setting for collector area type and climate zone on Solar optimisation menu 202 Mass flow rate in solar system for collector group 1 is too low Information displayed Æ items 1 3 and 4 in Fig 17 Text C...

Page 67: ...10 and reposition it Temperature rises instead of falling Clock time incorrectly set Check time setting Room temperature too high during Economy and or Frost mode The building retains a lot of heat Set an earlier switching time for Economy and or Frost Incorrect or no control BUS connection or BUS subscriber faulty Check the BUS connection against the wiring diagram and correct it if required Cont...

Page 68: ...mperature not reached Thermostatic valve s in the room set to low Open the thermostatic valve s Flow temperature controller on the heating appliance set too low Set flow temperature controller higher Air lock in the heating system Vent radiator and heating system Required room temperature is greatly exceeded Installation location of the FW 100 not suitable e g outer wall proximity to window draugh...

Page 69: ...Bus communication The TD 200 using the bus no longer responds Check the bus connection and if necessary rectify the interruption Heating appliance using the bus no longer responds Check the bus connection and if necessary rectify the interruption On Off instead of Room temperature TD 200 not detected during commissioning Set Set RT10 equipped to Yes Only Service modes are displayed e g Service 1 A...

Page 70: ...dow draught Choose a better installation location for TD 200 see Installation Instructions of the TD 200 Excessive room temperature fluctuations Temporary effect of heat from other sources on the room e g from sunshine room lighting TV fireplace etc Choose a better installation location for TD 200 see Installation Instructions of the TD 200 Temperature rise instead of fall Time of day incorrectly ...

Page 71: ...093 100 950 Tab 38 Central heating flow hot water sensors Appliance Fan speed ranges Hz 27CDi N G 29 78 30CDi N G 29 91 37CDi N G 32 84 42CDi N G 31 82 27CDi L P G 36 74 30CDi L P G 36 84 37CDi L P G 41 78 42CDi L P G 41 78 30CDi Conventional N G 29 91 40CDi Conventional N G 29 91 30CDi Conventional L P G 36 84 40CDi Conventional L P G 36 84 Tab 39 CDi fan speed range APPLIANCE SPEED RANGE MIN MAX...

Page 72: ...k NTC Elmwood NTC Outdoor NTC Outdoor NTC Tab 41 Thermisters RESISTANCE Ω TEMPERATURE C 35975 0 22763 10 14772 20 9786 30 6652 40 4607 50 3243 60 2332 70 1703 80 1261 90 949 100 Tab 42 Siemens thermisters RESISTANCE Ω TEMPERATURE C 33242 0 19947 10 12394 20 7947 30 5242 40 3548 50 2459 60 1740 70 1256 80 923 90 Tab 43 Elmwood thermisters RESISTANCE Ω TEMPERATURE C 4111 40 3669 35 3218 30 2775 25 2...

Page 73: ...TAT FAN Colour sequence e c n e u q e s r u o l o C FLOW TURBINE DIVERTER VALVE Red Orange Blue Yellow Green Black Black Black Black Orange Orange Orange Orange FLUE OVERHEAT STAT Red Red Black Black Black Black DHW SENSOR 230 V ROOM STAT PROGRAMMER ST1 DIAGNOSTIC INTERFACE CODE PLUG Fuse slow 2 5 A AC 230 V Fuse slow T 0 5 A Fuse slow T1 6 A ST6 230 V EXTERNAL FROST STAT OPTIONAL 6 720 612 485 01...

Page 74: ...CHANGER OVERHEAT STAT FAN Colour sequence Colour sequence DIVERTER VALVE Optional Red Orange Blue Yellow Green Black Orange Orange Orange FLUE OVERHEAT STAT Red Red Black Black Black Black WIRING CENTRE ST1 DIAGNOSTIC INTERFACE CODE PLUG Fuse slow 2 5 A AC 230 V Fuse slow T 0 5 A Fuse slow T1 6 A ST6 230 V EXTERNAL FROST STAT OPTIONAL 6 720 612 458 06 1O SAFETY SOLENOID SAFETY SOLENOID CH TEM PERA...

Page 75: ...utral Live SPARK TRANSFORMER FLAME SENSE ELECTRODE SPARK ELECTRODES FLOW NTC HEAT EXCHANGER OVERHEAT STAT FAN Colour sequence Colour sequence Orange Orange Orange FLUE OVERHEAT STAT Red Red Black Black Black Black ST1 DIAGNOSTIC INTERFACE CODE PLUG Fuse slow 2 5 A AC 230 V Fuse slow T 0 5 A Fuse slow T1 6 A ST6 6 720 612 032 35 1O SAFETY SOLENOID SAFETY SOLENOID CH TEM PERATURE CONTROL Black Black...

Page 76: ...ITION TRANSFORMER FLAME SENSE ELECTRODE SPARK ELECTRODES PRIMARY FLOW NTC PRIMARY OVERHEAT FAN Colour sequence Colour sequence Red Red FLUE OVERHEAT Orange Violet Violet Blue Blue ST1 DIAGNOSTIC INTERFACE CODE PLUG Fuse slow 2 5 A AC 230 V Fuse slow T 0 5 A Fuse slow T1 6 A ST6 SAFETY SOLENOID SAFETY SOLENOID O range Red Orange or Green Green or Orange Orange ST25 Violet Blue Orange CONDENSATE PUM...

Page 77: ...DE SPARK ELECTRODES PRIMARY FLOW NTC PRIMARY OVERHEAT FAN Colour sequence Colour sequence Red Red FLUE OVERHEAT Orange Violet Violet Blue Blue EXTERNAL WIRING CENTRE Y or S PLAN ST1 DIAGNOSTIC INTERFACE CODE PLUG Fuse slow 2 5 A AC 230 V Fuse slow T 0 5 A Fuse slow T1 6 A ST6 SAFETY SOLENOID SAFETY SOLENOID O range Red Orange or Green Green or Orange Orange ST25 EXTERNAL Violet Blue Orange CONDENS...

Page 78: ...14 431 019 0 30CDi system N G with diverter valve 8 714 431 002 0 30CDi system L P G with diverter valve 8 714 431 003 0 30CDi Regular N G 8 714 431 008 0 Mid position diverter valve systems and Zone valves systems 40CDi Regular N G 8 714 431 010 0 30CDi Regular L P G 8 714 431 009 0 40CDi Regular L P G 8 714 431 011 0 Tab 46 CDi code plug part numbers Component Order no Remarks Code plug Highflow...

Page 79: ...e combustion air produce highly corrosive hydrochloric acid in the flame and in some cases depending on the precise composition of the combustion air hydrofluoric acid both of which accumulate in the boiler and remain active over long periods In order to limit the damage the source of the air contamination must be located and sealed off If this is not possible the combustion air must be drawn from...

Page 80: ...624 Fax 01905 754619 Worcester Bosch Group is a brand name of Bosch Thermotechnology Ltd www worcester bosch co uk 8 716 115 748 CONTACT INFORMATION WORCESTER BOSCH GROUP TECHNICAL 08705 266241 SERVICE 08457 256206 SERVICE Eire 01494 0099 SPARES 01905 752571 LITERATURE 01905 752556 TRAINING 01905 752526 SALES 01905 752640 WEBSITE www worcester bosch co uk ...

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