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Ecodan EHPT15X-UKHDW1S, Service Manual

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Ecodan EHPT15X-UKHDW1S Service Manual Download Page 54

54

FAULT FINDING

IMPORTANT

•  Any required parts should be purchased from Mitsubishi Electric parts.

•  Disconnect the electrical supply before removing any electrical equipment covers.

•  NEVER bypass any thermal controls or  operate system without the necessary safety valves.

•  Water contained in the Air Source Heat Pump pre-plumbed cylinder may be very hot, especially following a thermal control 

failure. Caution must be taken when drawing water from the unit.

The fault finding table (above) will enable operational faults to be identified and their possible causes rectified. Any work carried 

out on this unvented water heater and its associated controls MUST be carried out by a competent installer for unvented 

water heating systems. In case of doubt contact Technical Support (see contact details on back page).

WARNING

DO NOT TAMPER WITH ANY OF THE SAFETY VALVES OR CONTROLS SUPPLIED WITH THE PRE-PLUMBED CYLINDER 

AS THIS WILL INVALIDATE ANY GUARANTEE.

Fault Finding Table

FAULT

POSSIBLE CAUSE

REMEDY

No hot water flow

1. Mains supply off.

1. Check and open stock cock.

2. Strainer blocked.

2. Turn off water supply. Remove strainer and 

clean (see maintanance section).

3. Cold water combination valve 

incorrectly fitted.

3. Check and refit as required.

Water from hot 

taps is cold

1. BACK UP immersion heater not switched on. 

1. Check and switch on.

2. BACK UP immersion heater thermal 

cut-out has operated.

2. Check. Reset by pushing button.

3. Programmer set to Central Heating 

only.

3. Check. Set to Domestic Hot Water programme.

4. Air Source Heat Pump not working.

4.  Check  heat  pump  operation.  If  fault  is 

suspected, consult heat pump instructions.

5. Thermal cut-out has operated.

5. Check. Reset by pushing button on cut-out. 

Check operation of DHW thermal sensor.

6. DHW circulating pump not connected 

correctly.

6. Check wiring and/or plumbing connections to 

DHW circulating pump. Check isolating valves 

are open.

Water discharges 

from Expansion 

Valve

1. INTERMITTENTLY

Expansion vessel charge pressure 

has reduced below 3.5bar.

1. See Maintance section for re-charging 

procedure.

2. CONTINUALLY

a. Cold water combination valve 

pressure reducer not working 

correctly.

b. Expansion valve seat damaged.

2a. Check pressure from cold water combination 

valve. If greater than 3.6 bar, replace pressure 

reducer cartridge.

2b. Remove expansion valve cartridge. Check 

condition of seat. If necessary, fit new expansion 

valve cartridge.

Water discharges 

from T&P Relief 

Valve

1. Thermal control failure. NOTE 

water will be very hot.

1. Switch off power to immersion heater(s) and /or shut down 

Heat Pump. DO NOT turn off water supply. When discharge 

stops check all thermal controls, replace if faulty.

Milky water

1. Oxygenated water.

1. Water from a pressurised system releases 

oxygen bubbles when flowing. The milkiness will 

disappear after a short while.

Summary of Contents for EHPT15X-UKHDW1S

Page 1: ...LEAVE THIS MANUAL WITH THE CUSTOMER FOR FUTURE REFERNCE EHPT15X UKHLDW1S EHPT17X UKHLDW1S EHPT15X UKHDW1S EHPT17X UKHDW1S EHPT21X UKHDW1S EHPT21X UKHDW1L EHPT25X UKHDW1L EHPT30X UKHDW1L January 2022 Doc No 607483 PRE PLUMBED UNVENTED MAINS PRESSURE WATER HEATER WITH FTC6 CONTROL SYSTEM FOR USE WITH ECODAN PUZ H WM AIR SOURCE HEAT PUMP RANGE ...

Page 2: ...RT NAMES AND FUNCTIONS 8 OUTLINES AND DIMENSIONS 9 WIRING DIAGRAM 13 FIELD WIRING 15 WATER SYSTEM DIAGRAM 16 CONTROLS 19 TROUBLESHOOTING 40 DISASSEMBLY PROCEDURE 55 SUPPLEMENTARY INFORMATION 57 SERVICE AND MAINTENANCE 58 ENVIRONMENTAL INFORMATION 68 TECHNICAL SUPPORT 68 ...

Page 3: ...S SERVICE MANUAL Service Ref Service Manual No Packaged model PUZ WM50VHA BS UK PUZ WM60VAA BS UK PUZ WM85VAA BS UK PUZ WM85YAA BS UK PUZ WM112VAA BS UK PUZ WM112YAA BS UK OCH727 OCB727 PUZ HWM140VHA BS PUZ HWM140YHA BS OCH748 OCB748 ...

Page 4: ...or drinking or cooking This could cause illness to the user Do not stand on the units Do not touch switches with wet hands Do not place any heavy items on top of the cylinder unit other refrigerant and do not allow air to remain in the lines If air is mixed with the refrigerant then it can be the cause of abnormal high pressure in the refriger ant line and may result in an explosion and other haza...

Page 5: ...lling a Water Hammer Arrestor on the primary water circuit as directed by the man ufacturer As for the handling of refrigerant refer to the outdoor unit installation manual 1 Cautions for service 1 Perform service after recovering the refrigerant left in unit completely 2 Do not release refrigerant in the air 3 After completing service charge the cycle with specified amount of refrigerant 4 If moi...

Page 6: ...220 240 V 50Hz single 16 220 240 V 50Hz single 3 13 16 DHW and 1 hea ng zone 80 5 90 1 0 10 0 0 8 8 0 Duplex stainless steel Expanded polyurethane PU 60 Mechanical zones Op onal wireles room thermostat and wireless receiver STANDARD 0 35 3 5 22 22 28 22 Heat Pump Grundfos UPM3L 25 75 130AZA Hea ng Grundfos UPM3 AUTO 25 70 130 DHW Grundfos UPSO 15 60 CIL2 14 17 24 32 40 l min 80 0 3 3 0 Contained w...

Page 7: ...oller PAR WR51 E receiver zero 3 1 220 240 V 50Hz single 16 220 240 V 50Hz single 3 13 16 DHW and 1 hea ng zone 80 5 90 1 0 10 0 0 8 8 0 Duplex stainless steel Expanded polyurethane PU 50 Mechanical zones Op onal wireles room thermostat and wireless receiver SLIMLINE 0 35 3 5 22 22 14 17 24 l min 80 0 3 3 0 Contained within outdoor unit 75 Dimensions mm Weight empty full kg Materials Insula on Ele...

Page 8: ...eater housing Primary circuit pressure gauge Primary circuit drain off point Heating zone 1 circulating pump THW5A thermistor boss Temperature Pressure Relief Valve Expansion Valve Tundish DHW circulating pump Scale Trap DHW Drain off point Plate to Plate heat exchanger Magnetic filter Expansion vessel tapping Hot Water Outlet PART NAMES AND FUNCTIONS ...

Page 9: ...KEY A OVERALL HEIGHT B SECONDARY RETURN TAPPING C HEAT PUMP FLOW CONNECTION 28mm O D COPPER D TUNDISH OUTLET CONNECTION 22mm COMPRESSION E HEAT PUMP RETURN CONNECTION 28mm O D COPPER F HEATING ZONE 1 CIRCUIT FLOW CONNECTION 22mm O D COPPER G HEATING ZONE 1 CIRCUIT RETURN CONNECTION 22mm O D COPPER H COLD WATER INLET CONNECTION 22mm COMPRESSION I HOT WATER OUTLET CONNECTION 22mm COMPRESSION 3 4 BSP...

Page 10: ...Y RETURN TAPPING NOT FITTED TO EHPT15X UKHDW1S EHPT17X UKHDW1S C HEAT PUMP FLOW CONNECTION 22mm O D COPPER D TUNDISH OUTLET CONNECTION 22mm COMPRESSION E HEAT PUMP RETURN CONNECTION 22mm O D COPPER F HEATING ZONE 1 CIRCUIT FLOW CONNECTION 22mm O D COPPER G HEATING ZONE 1 CIRCUIT RETURN CONNECTION 22mm O D COPPER H COLD WATER INLET CONNECTION 22mm COMPRESSION I HOT WATER OUTLET CONNECTION 22mm COMP...

Page 11: ...T PUMP FLOW CONNECTION 22mm O D COPPER C TUNDISH OUTLET CONNECTION 22mm COMPRESSION D HEAT PUMP RETURN CONNECTION 22mm O D COPPER E HEATING ZONE 1 CIRCUIT FLOW CONNECTION 22mm O D COPPER F HEATING ZONE 1 CIRCUIT RETURN CONNECTION 22mm O D COPPER G COLD WATER INLET CONNECTION 22mm COMPRESSION H HOT WATER OUTLET CONNECTION 22mm COMPRESSION 3 4 BSP M J THW5A SENSOR POCKET K WI FI ADAPTOR INCLUDED INS...

Page 12: ...m 150mm 150mm C A B Clearances Side Front Rear Dimensions of A B C in above diagram Ceiling or similar Floor D 120mm Dimension of D in above diagram Model Dimension D 1636mm 1810mm 1251mm 1377mm 1629mm 1629mm 1881mm 2195mm EHPT21X UKHDW1L EHPT25X UKHDW1L EHPT30X UKHDW1L EHPT15X UKHDW1S EHPT17X UKHDW1S EHPT21X UKHDW1S EHPT15X UKHLDW1S EHPT17X UKHLDW1S Dimension Model A B C 976mm 972mm 268mm 1030mm ...

Page 13: ...4 CNP4 Water circulation pump 4 output DHW OFF ON OUT15 TBO 4 1 2 Comp ON signal OFF ON OUT16 TBO 3 3 4 Thermo ON signal OFF ON OUTA1 TBI 4 7 8 Analog output 0V 10V BC TBO 5 3 4 Booster heater protection output OFF BHT Open ON BHT Short BHT TBO 5 1 2 CNBHT Thermostat for booster heater Thermostat normal Short High temp open Do not connect to the terminals that are indicated as in the T 1 For 2 zon...

Page 14: ...ction at open OFF SW2 3 Booster heater capacity restriction Inactive Active OFF SW2 4 Cooling mode function Inactive Active OFF SW2 5 Automatic switch to backup heat source op eration When outdoor unit stops by error Inactive Active OFF SW2 6 Mixing tank WITHOUT Mixing tank WITH Mixing tank OFF SW2 7 2 zone temperature control Inactive Active OFF SW2 8 Flow sensor WITHOUT Flow sensor WITH Flow sen...

Page 15: ...ter power supply 2 Min 1 5 FTC Master power supply earth 1 Min 1 5 FTC Master Outdoor unit 2 2 Min 0 3 FTC Master Outdoor unit earth Circuit rating FTC Master L N 3 230V AC FTC Master Outdoor unit S1 S2 3 FTC Master Outdoor unit S2 S3 3 24V DC 2 Max 120 m 3 The values given in the table above are not always measured against the ground value Notes 1 Wiring size must comply with the applicable local...

Page 16: ...at Pump 13 Scale Trap 25 Primary circuit draw off point 2 Cylinder 14 DHW Circulating Pump 26 Automatic Air Vent 3 FTC6 Controller 15 Flow Sensor 27 Differential Pressure Bypass Valve 4 Immersion heater 16 Primary Pump 28 Strainer 5 3 5 bar Pressure reducing Valve incorporating 17 Primary Expansion Vessel 29 Isolating Valve Strainer and Check Valve supplied loose 18 Primary Pressure Relief valve 3...

Page 17: ...17 Zone1 Zone2 Zone1 Zone2 Optional 2 zone twin temperature control pack plumbing schematic Optional 2 zone control pack plumbing schematic Local System ...

Page 18: ...ia a suitable hose On completion close drain cock re fill system and resume system commissioning PRIMARY CIRCUIT FILLING THE SYSTEM Check and charge expansion vessel Check all connections including factory fitted ones are tight Insulate pipework between cylinder and outdoor unit Thoroughly clean and flush system of all debris see page 24 for instruction Fill cylinder unit with potable water Fill p...

Page 19: ...ature 7 Decrease set temperature 8 Z1 Z2 Pressing the function button below this icon switches between Zone1 and Zone2 Information Pressing the function button below this icon displays the information screen 9 Space heating cooling mode Heating mode Zone1 or Zone2 Cooling mode Zone1 or Zone2 10 DHW mode Normal or ECO mode 11 Holiday mode When this icon is displayed Holiday mode activated 12 Timer ...

Page 20: ...gs accidentally there are 2 access levels to the main settings and the service section menu is password protected User Level Short press If the MENU button is pressed once for a short time the main settings will be displayed but without the edit function This will enable the user to view current settings but NOT change the parameters Installer Level Long press If the MENU button is pressed down fo...

Page 21: ...estriction Active Non active Heating room temp Heating compensation curve Compensation curve preview Compensation curve edit F1 F1 F3 F1 F2 F2 F2 F2 F4 F3 F3 F3 F4 F4 F3 F4 F2 F4 F3 F4 F2 F3 F4 DHW Date Time yyyy mm dd hh mm EN FR DE SV ES IT DA NL FI NO PT BG PL CZ RU TR SL OFF Room Tank Room Tank OFF ON hh mm hh mm AM AM hh mm C F Room RC zone select Sensor setting Zone1 Zone1 Zone2 Holiday mode...

Page 22: ...icity Electric Heat pump capacity ON OFF Boiler Boiler Target temp Start Finish Temp increase step Temp decrease step Max temp Max temp period Increase interval Decrease interval Booster heater 2 capacity Booster heater 1 capacity Flow temp Increase Flow temp Decrease Priority Ambient Cost CO2 Ambient Intelligent settings Minimum temp ON OFF Mode Interval Maximum temp Lower limit Upper limit Minim...

Page 23: ...ater capacity Demand control IN4 Main controller SD Yes No Select download data OFF Heat source Boiler Heater Boiler Outdoor thermostat IN5 FTC Main RC SD Yes No Select upload data Water pump input Electric energy meter Booster heater 1 capacity Pump 1 Booster heater 2 capacity Pump 2 Immersion heater Pump 3 F1 F2 F3 Delivered energy adjustment Heat meter Main RC Analog output Pump 4 Thermo ON out...

Page 24: ...mpting the installer to stop operation before continu ing By selecting Yes the unit will cease operation Selected Running Error indication Manual operation be manually overridden using manual operation mode When manual operation is selected a small timer icon appears in the screen The function selected will only remain in manual operation for a maximum of 2 hours This is to prevent accidental perm...

Page 25: ...ump switched off may increase the duration of stand by in Heating Cooling mode 2 ator of each mixing valve It is recommended to set the interval to 2 minutes that is a default value With the interval set longer it could take longer to warm up a room 3 EHPT 15 21 X UKH L DW1S Minimum 5L min EHPT 15 21 X UKH L DW1S Maximum 100L min EHPT 21 30 X UKHDW1L Minimum 7L min EHPT 21 30 X UKHDW1L Maximum 100...

Page 26: ...erval to 2 minutes that is a default value With the interval set longer it could take longer to warm up a room Heat source setting The default heat source setting is heat pump and all electric heaters present in the system to be operational This is referred to as Standard operation on the menu Flow sensor 1 From the Auxiliary settings menu highlight Flow sensor 2 Press CONFIRM 3 Press F3 or F4 but...

Page 27: ... Upper limit 3 to 5 ºC 5 Heating operation Room temp control table Notes Range of outdoor ambient temperature at which simultaneous operation starts is 30 to 10 C default 15 C System shall automatically return to routine operation This will happen when the outdoor ambient temperature rises above the Cold weather function For extremely low outdoor ambient temperature conditions when the heat pump s...

Page 28: ...lied locally Refer to the menu tree in Main Settings Menu When additional pumps supplied locally are connected change setting according to specs of the pumps When anti freeze solution is used for primary water circuit set the delivered energy adjustment if necessary For further detail of above refer to Main remote controller Connectable electric energy meter and heat meter Pulse meter type Voltage...

Page 29: ...mistor reading This function shows the current readings of thermistors located on the water and refrigerant circuit Thermistor Description Thermistor Description TH1A Zone1 room temperature TH7 Ambient outdoor temperature TH1B Zone2 room temperature THW6 Zone1 flow temperature TH2 Refrigerant return temperature THW7 Zone1 return temperature THW1 Flow water temperature THW8 Zone2 flow temperature T...

Page 30: ...r history Error history allows the service engineer to view previous check codes the unit address and the date on which they occurred Up to 16 check codes can be stored in the history the most recent Error event is displayed at the top of the list 1 From the service menu select Error history 2 Press CONFIRM Please see 10 4 Self diagnosis and action for check code diagnosis and ac tions To delete a...

Page 31: ...1 For multiple outdoor units control system only Completion screen Resetting the password If you forget the password you entered or have to service a unit somebody else installed you can reset the password to the factory default of 0000 1 From the main settings menu scroll down the functions until Service Menu is highlighted 2 Press CONFIRM 3 You will be prompted to enter a password 4 Hold down bu...

Page 32: ...it Zone1 room temp TH1A 39 to 88 C 505 Indoor unit Ref liquid temp TH2 39 to 88 C 506 Indoor unit Return water temp THW2 39 to 88 C 507 Indoor unit Zone2 room temp TH1B 39 to 88 C 508 Indoor unit DHW tank lower water temp THW5B 39 to 88 C 509 39 to 88 C 510 Indoor unit Outside air temp TH7 39 to 88 C 511 Indoor unit Flow water temp THW1 39 to 88 C 512 Indoor unit Zone1 return water temp THW7 39 to...

Page 33: ...0 1 0 1 1 1 0 0 00 3A 1 1 0 1 1 1 0 0 00 3B 0 0 1 1 1 1 0 0 00 3C 1 0 1 1 1 1 0 0 00 3D 0 1 1 1 1 1 0 0 00 3E 1 1 1 1 1 1 0 0 00 3F 0 OFF 1 ON SW1 SW2 SW3 SW4 SW5 Display 1 2 3 4 5 6 7 8 0 0 0 0 0 0 1 0 00 40 1 0 0 0 0 0 1 0 00 41 0 1 0 0 0 0 1 0 00 42 1 1 0 0 0 0 1 0 00 43 0 0 1 0 0 0 1 0 00 44 1 0 1 0 0 0 1 0 00 45 0 1 1 0 0 0 1 0 00 46 1 1 1 0 0 0 1 0 00 47 0 0 0 1 0 0 1 0 00 48 1 0 0 1 0 0 1 0...

Page 34: ...0 1 0 1 1 1 0 1 00 BA 1 1 0 1 1 1 0 1 00 BB 0 0 1 1 1 1 0 1 00 BC 1 0 1 1 1 1 0 1 00 BD 0 1 1 1 1 1 0 1 00 BE 1 1 1 1 1 1 0 1 00 BF 0 OFF 1 ON SW1 SW2 SW3 SW4 SW5 Display 1 2 3 4 5 6 7 8 0 0 0 0 0 0 1 1 00 C0 1 0 0 0 0 0 1 1 00 C1 0 1 0 0 0 0 1 1 00 C2 1 1 0 0 0 0 1 1 00 C3 0 0 1 0 0 0 1 1 00 C4 1 0 1 0 0 0 1 1 00 C5 0 1 1 0 0 0 1 1 00 C6 1 1 1 0 0 0 1 1 00 C7 0 0 0 1 0 0 1 1 00 C8 1 0 0 1 0 0 1 1...

Page 35: ... 0 xx 38 1 0 0 1 1 1 0 0 xx 39 0 1 0 1 1 1 0 0 xx 3A 1 1 0 1 1 1 0 0 xx 3B 0 0 1 1 1 1 0 0 xx 3C 1 0 1 1 1 1 0 0 xx 3D 0 1 1 1 1 1 0 0 xx 3E 1 1 1 1 1 1 0 0 xx 3F 0 OFF 1 ON OUT Display 1 2 3 4 5A 5B 6 7 0 0 0 0 0 0 1 0 xx 40 1 0 0 0 0 0 1 0 xx 41 0 1 0 0 0 0 1 0 xx 42 1 1 0 0 0 0 1 0 xx 43 0 0 1 0 0 0 1 0 xx 44 1 0 1 0 0 0 1 0 xx 45 0 1 1 0 0 0 1 0 xx 46 1 1 1 0 0 0 1 0 xx 47 0 0 0 1 0 0 1 0 xx 4...

Page 36: ... 1 xx B8 1 0 0 1 1 1 0 1 xx B9 0 1 0 1 1 1 0 1 xx BA 1 1 0 1 1 1 0 1 xx BB 0 0 1 1 1 1 0 1 xx BC 1 0 1 1 1 1 0 1 xx BD 0 1 1 1 1 1 0 1 xx BE 1 1 1 1 1 1 0 1 xx BF 0 OFF 1 ON OUT Display 1 2 3 4 5A 5B 6 7 0 0 0 0 0 0 1 1 xx C0 1 0 0 0 0 0 1 1 xx C1 0 1 0 0 0 0 1 1 xx C2 1 1 0 0 0 0 1 1 xx C3 0 0 1 0 0 0 1 1 xx C4 1 0 1 0 0 0 1 1 xx C5 0 1 1 0 0 0 1 1 xx C6 1 1 1 0 0 0 1 1 xx C7 0 0 0 1 0 0 1 1 xx C...

Page 37: ...0 37 xx 0 0 0 1 1 1 0 0 38 xx 1 0 0 1 1 1 0 0 39 xx 0 1 0 1 1 1 0 0 3A xx 1 1 0 1 1 1 0 0 3B xx 0 0 1 1 1 1 0 0 3C xx 1 0 1 1 1 1 0 0 3D xx 0 1 1 1 1 1 0 0 3E xx 1 1 1 1 1 1 0 0 3F xx Displayed only when the request code is 553 0 OFF 1 ON OUT Display 8 9 10 11 12 13 14 15 0 0 0 0 0 0 1 0 40 xx 1 0 0 0 0 0 1 0 41 xx 0 1 0 0 0 0 1 0 42 xx 1 1 0 0 0 0 1 0 43 xx 0 0 1 0 0 0 1 0 44 xx 1 0 1 0 0 0 1 0 4...

Page 38: ... 1 1 1 1 1 0 0 00 3E 1 1 1 1 1 1 0 0 00 3F Input signal display Request code 176 554 Please refer to Table 1 on relevant wiring diagram whilst using the following 0 OFF open 1 ON short IN Display 1 2 3 4 5 6 7 8 0 0 0 0 0 0 1 0 00 40 1 0 0 0 0 0 1 0 00 41 0 1 0 0 0 0 1 0 00 42 1 1 0 0 0 0 1 0 00 43 0 0 1 0 0 0 1 0 00 44 1 0 1 0 0 0 1 0 00 45 0 1 1 0 0 0 1 0 00 46 1 1 1 0 0 0 1 0 00 47 0 0 0 1 0 0 ...

Page 39: ...Indoor unit only operation is now deactivated Emergency operation In emergency operation an operation without connecting outdoor unit and main remote controller is possible When in Emergency operation the main control has NO control functions C and DHW tank temp is restricted 50 C 1 Heater Heating for DHW and space heating is provided by the heater Activating emergency operation mode To activate e...

Page 40: ...leshooting by inferior phenomena 3 If no obvious problem can be found continue to operate the unit Note Troubleshooting by inferior phenomena fully before resorting to replacing parts Test Run Before a test run After installation of outdoor unit pipework and electrical wiring recheck that there is no water leakage loosened connections or miswiring Measure impedance between the ground and the power...

Page 41: ...primary water circuit are installed level 4 2 way valve local supply actuator fault 4 Electrically test to determine fault 5 3 way valve actuator fault 5 1 Electrically test to determine fault 2 Operate 3 way valve manually using the main remote controller Refer to Manual operation in 9 5 Service menu 3 Replace 3 way valve coil 4 Replace 3 way valve Refer to Procedure 6 in 11 DISASSEMBLY PROCEDURE...

Page 42: ...nd when Main remote controller or Room RC 1 8 is chosen for the Room Sensor setting in the Initial setting 4 Replace wireless remote controller or main remote controller 5 Incorrect setting of the DIP switch es 5 Check the DIP switch setting s L6 Circulation water freeze protection DHW Heating Cooling LP FS OS Check code displayed when THW1 detects a temp 1ºC for 10 consecutive seconds or THW2 det...

Page 43: ...ion DHW Heating LP FS Exception For 1 minute after water circulation pump1 is switched on 1 1 Refer to table in Checking Component Parts Function to determine if system pump meets requirements If more head required either add a pump of the same size or replace existing pump with capacity model See DISASSEMBLY PROCEDURE for how to replace pump 2 Due to 1 or more of the following blocked strainer le...

Page 44: ...check codes P1 P2 L5 LD LE Boiler operation error Heating Boiler is running and THW6 detects a temperature 30ºC for consecutive 60 minutes 1 THW6 has become detached from its holder 1 Visually inspect location and reattach as necessary 2 Incorrect wiring between FTC OUT10 and the boiler 2 See the manual of the thermistors PAC TH011HT E 3 Boiler fuel has run out or the system is OFF 3 Check the sta...

Page 45: ...rollers have been connected to the FTC 1 Only connect 1 main remote controller to 1 FTC indoor unit board 2 Fault with main remote controller transmission receiving circuit board 2 to 4 Turn the power to the indoor unit OFF and then ON Power to both the indoor unit and outdoor units should be switched OFF then ON This may require switching 1 or 2 breakers depending if the unit is powered indepen d...

Page 46: ...ss remote controller for 15 consecutive minutes The digit after the J refers to the address of the wireless remote controller that has the error E g Check code J3 refers to a communication fault between the wireless receiver and wireless remote control with address 3 1 Battery on wireless remote control may 1 Check and replace the battery if necessary the wireless remote controller battery 2 The w...

Page 47: ... between FTC and outdoor unit 3 The main screen appears with a press of the ON button but disappears in a second The main remote controller operations do not work for a while after the settings are changed in the service menu This is because the system takes time to apply the changes Normal operation The indoor unit is applying updated settings made in the service menu Normal operation will start ...

Page 48: ...GRAM 1 SD memory card is NOT inserted into the memory card slot with correct orientation 1 Correctly insert SD memory card in place until a click is heard 2 Not an SD standards compliant memory card 2 Use an SD standards compliant memory card Refer to installation manual 5 8 Using SD memory card LED4 on FTC is blinking See WIRING DIAGRAM 1 Full of data 1 Move or delete data or replace SD memory ca...

Page 49: ...e 3 way valve Refer to DISASSEMBLY PROCEDURE 4 Water pump sanitary circuit speed setting failure 4 Water pump sanitary circuit MUST be set to speed 2 When it set to speed 1 hot water would be mixed with cold water due to circulation 11 Hot or warm water from cold tap Heat of hot water pipe is transferred to cold water pipe Insulate re route pipework 12 Water leakage 1 Poorly sealed connections of ...

Page 50: ... i Manually override 3 way valve using the main remote controller Refer to Manual operation in Service menu If the 3 way valve does not function go to ii below ii Replace 3 way valve coil If the 3 way valve coil is replaced but the 3 way valve does not function go to iii below iii Replace 3 way valve Refer to DISASSEMBLY PROCEDURE 20 Water discharges from pressure relief valve Primary circuit 1 If...

Page 51: ...ngs Economy settings for pump Increase the time of Delay in Economy settings for pump 30 The cylinder unit that was running in the heating mode before power failure is running in the DHW mode after power recovery The cylinder unit is designed to run in an operation mode with a higher priority i e DHW mode in this case at power recovery Normal operation After the DHW max operation time has elapsed ...

Page 52: ...ne set at the main remote controller by referring to Energy monitor setting in 9 5 Service menu 2 Non connectable type of external meter local supply is connected 2 Check if the external meter local supply is connectable type by referring to Energy monitor setting in Service menu 3 External meter local supply failure 3 Check if signal is sent to IN8 to IN10 properly Refer to section WIRING DIAGRAM...

Page 53: ... input IN4 TBI 1 1 2 Demand control input IN3 TBI 1 3 4 Flow switch 2 input IN6 TBI 2 5 6 Room thermostat 2 input CNBC Signal output for booster heater 230 VAC OUT11 TBO 3 5 6 Signal output Error 230 VAC OUT5 TBO 2 1 3 Mixing valve Local supply 1 2 Close 230 VAC 2 3 Open 230 VAC CNP4 OUT14 Water circulation pump4 230 VAC OUT3 TBO 1 5 6 Water circulation pump3 Local supply 230 VAC OUT2 TBO 1 3 4 Wa...

Page 54: ... switched on 1 Check and switch on 2 BACK UP immersion heater thermal cut out has operated 2 Check Reset by pushing button 3 Programmer set to Central Heating only 3 Check Set to Domestic Hot Water programme 4 Air Source Heat Pump not working 4 Check heat pump operation If fault is suspected consult heat pump instructions 5 Thermal cut out has operated 5 Check Reset by pushing button on cut out Ch...

Page 55: ...er inlet The primary circuit DHW can then be drained from the points shown in the diagram above Disconnect the pipework from the hot water outlet heat pump flow return heating circuit flow return and expansion relief valve pipework The cylinder can then be removed See next page for step by step procedure and images PREPARATION FOR DISASSEMBLY Prepare the proper tools Prepare the proper protectors ...

Page 56: ... secure Run hose to drain 5 Disconnect hot water supply from cylinder Drain valve Drain valve 3 4 BSP nut 3 4 BSP nut Expansion relief valve Primary flow Primary return 6 Disconnect primary flow return from heat pump Disconnect the heating circuit flow return The cylinder can now be removed care must be taken as the cylinder will be heavy 1 Turn off electrical supplies to both Cylinder and Heat Pu...

Page 57: ...er 2 4 Install one of the following room temperature thermostats 3 Wireless remote controller option Room temp thermostat local supply Main remote controller remote position 1 The boiler temperature thermistor is an optional part 2 OUT10 has no voltage across it 3 Boiler heating is controlled on off by the Room temp thermostat Remote controller settings 1 Go to Service menu Heat source setting and...

Page 58: ... C to 60 C 40 C set point Zone1 outdoor ambient temp 28 C to 35 C 7 35 C 20 C to 60 C 25 C Zone2 outdoor ambient temp 2 28 C to 35 C 7 35 C 20 C to 60 C 25 C Adjust Zone1 outdoor ambient temp 29 C to 34 C 8 20 C to 60 C Zone2 outdoor ambient temp 2 29 C to 34 C 8 20 C to 60 C Holiday DHW Active Non active Non active Heating Cooling 3 Active Non active Active Zone1 heating room temp 10 C to 30 C 15...

Page 59: ...mp rise 1 to 5 C 3 C Intelligent set tings Energy price 16 Electricity 0 001 to 999 kWh 0 5 kWh Boiler 0 001 to 999 kWh 0 5 kWh CO2 emis sion Electricity 0 001 to 999 kg CO2 kWh 0 5 kg CO2 kWh Boiler 0 001 to 999 kg CO2 kWh 0 5 kg CO2 kWh Heat source Heat pump capacity 1 to 40 kW 11 2 kW 25 to 150 80 Booster heater 1 capac ity 0 to 30 kW 2 kW Booster heater 2 capac ity 0 to 30 kW 4 kW Smart grid r...

Page 60: ... and SW2 7 are ON 3 Cooling mode settings are available for ER model only 4 When the cylinder unit is connected with a PUMY P outdoor unit the mode is fixed to Normal 5 For the model without both booster and immersion heater it may not reach the set temperature depending on the outside ambient temperature 6 The lower limit is 15 C depending on the connected outdoor unit 7 The lower limit is 13 C d...

Page 61: ...y Notes 1 Check condition of cables 2 Controller Frequency Notes 1 2 Check operation of motorized valves ensure they reseat correctly 3 Check battery power of wireless thermostat and replace if necessary Outdoor heat pump unit maintenance record sheet Model number Serial number Mechanical Frequency Notes 1 Inspect grill and air inlet for trapped debris damage 2 Check condensate drain provision 3 C...

Page 62: ... Remove the over temperature cutout by pulling from the terminal connections on the immersion heater Unscrew immersion heater backnut and remove immersion heater from the unit A key spanner is supplied with the cylinder unit for easy removal tightening of the backnut s Over time the immersion heater gasket may become stuck to the mating surface To break the seal insert a round bladed screwdriver i...

Page 63: ... the valve cap to open the drain valve 4 Remove the magnet then slowly open the inlet valve to control the flow Flush out the filter until water runs clear 2 Close the inlet outlet valves Remove the drain valve cap locate it on the drain valve 1 Ensure the installation is not operating the primary pump is OFF 7 Open the inlet outlet valves 8 The installation can be operated 6 Replace the drain val...

Page 64: ... Valve Cap Filter Body Fernox TF 1 Sigma Magnetic Filter assembly ANNUAL MAINTENANCE LOG BOOK On completion of any maintenance or service of the pre plumbed cylinder the Annual Maintenance Log Book should be filled in to record the actions taken and the date the work was undertaken ...

Page 65: ...65 Notes ...

Page 66: ...66 Notes ...

Page 67: ...67 Notes ...

Page 68: ...ne Hatfield Hertfordshire AL10 8XB General Enquiries Telephone 01707 282880 Fax 01707 278881 TECHNICAL SUPPORT ENVIRONMENTAL INFORMATION Products are manufactured from many recyclable materials At the end of their useful life they should be disposed of at a Local Authority Recycling Centre in order to realise the full environmental benefits Insulation is by means of an approved CFC HCFC free polyu...

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