Mitsubishi Electric ecodan EHPT17X-VM2D Service Manual Download Page 81

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DISASSEMBLY PROCEDURE

PHOTOS/FIGURES

OCH714D

Photo 10-6

10. How to remove the plate heat exchanger (P-HEX)

(Refrigerant - Water)

<E*ST**C/D series>

(1) Pump down the refrigerant circuit and close the stop

valve at the outdoor unit side.

(Refer to 12. SUPPLEMENTARY INFORMATION.)

(2) Remove the front panel. (Refer to Procedure 1.)

Remove the left side panel. (Refer to Procedure 22.)

(3) Remove the control box. (Refer to Procedure 4.)

(4) Remove the DIV frame by cutting the band and

removing 2 screws on it. (Photo 10-1) (E*ST20/30*

series)

Remove the DIV frame by cutting the band and

removing 4 screws on it. (Photo 10-6) (ERST17D-***BD

series)

(5) Cut the bands bundling the pipes. (Photos 10-1, 10-2

and 10-6)

(6) Remove the 2 flare nuts on the refrigerant piping on top

of the cylinder unit. (Photo 10-3)

Photo 10-2

Photo 10-3

DIV frame

Screws

Bands

Top panel

Flare nuts

P-HEX

Continue to the next page.

Screws

Cable

strap

Bands

Fastener

DIV frame

Note: The photos shown are of the ERST17D-YM9BD model.

Photo 10-1

DIV frame

Screw

Screws

P-HEX

Screws

Cable

strap

Bands

Fastener

Note:

The photos shown are of the EHST20D-VM6D model with

optional immersion heater.

DIV frame

Summary of Contents for ecodan EHPT17X-VM2D

Page 1: ...OUTLINES AND DIMENSIONS 14 6 WIRING DIAGRAM 16 7 FIELD WIRING 25 8 WATER SYSTEM DIAGRAM 29 9 CONTROLS 33 10 TROUBLESHOOTING 54 11 DISASSEMBLY PROCEDURE 72 12 SUPPLEMENTARY INFORMATION 96 13 SERVICE AND MAINTENANCE 97 Model Name Revision ERST17D VM2BD UK ERST17D VM6BD UK and ERST17D YM9BD UK have been added in REVISED EDITION D EHST20D MED EHST20D TM9D EHST20D VM2D EHST20D VM6D EHST20D YM9D EHST20D...

Page 2: ...T20D VM6D UK EHST20D VM6DR1 UK EHST20D YM9D UK EHST20D YM9DR1 UK EHST20D YM9ED UK EHST20D YM9EDR1 UK EHST30C MED UK EHST30C MEDR1 UK EHST30C TM9ED UK EHST30C TM9EDR1 UK EHST30C VM6ED UK EHST30C VM6EDR1 UK EHST30C YM9ED UK EHST30C YM9EDR1 UK EHST30D MED UK EHST30D MEDR1 UK EHST30D TM9ED UK EHST30D TM9EDR1 UK EHST30D VM6ED UK EHST30D VM6EDR1 UK EHST30D YM9ED UK EHST30D YM9EDR1 UK ERPT17X VM2D UK ERP...

Page 3: ...ED UK EHPT30X YM9ED UK ERPT30X VM2ED UK EHST17D VM2DR1 UK ERST17D VM2DR1 UK EHST20D MEDR1 UK EHST20D VM2DR1 UK EHST20D VM6DR1 UK EHST20D YM9DR1 UK EHST20D YM9EDR1 UK EHST20D TM9DR1 UK ERST20D VM2DR1 UK EHST30D MEDR1 UK EHST30D VM6EDR1 UK EHST30D YM9EDR1 UK EHST30D TM9EDR1 UK ERST30D VM2EDR1 UK EHST20C MEDR1 UK EHST20C VM2DR1 UK EHST20C VM6DR1 UK EHST20C YM9DR1 UK EHST20C YM9EDR1 UK EHST20C TM9DR1 ...

Page 4: ...125YKM4R4 BS UK PUMY P140YKM4R4 BS UK PUMY P112YKME4R4 BS UK PUMY P125YKME4R4 BS UK PUMY P140YKME4R4 BS UK OCH673 OCB673 PUMY P112VKM5 BS PUMY P125VKM5 BS PUMY P140VKM5 BS PUMY P112VKM5 ET BS PUMY P125VKM5 ET BS PUMY P140VKM5 ET BS PUMY P112VKM5 ER BS PUMY P125VKM5 ER BS PUMY P140VKM5 ER BS OCH740 OCB740 PUD SWM60VAA BS UK PUD SWM80VAA BS UK PUD SWM80YAA BS UK PUD SWM100VAA BS UK PUD SWM100YAA BS ...

Page 5: ...Do not place any heavy items on top of the cylinder unit When installing relocating or servicing the cylinder unit use only the heat pump s specified refrigerant to charge the refrigerant lines Do not mix it with any 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 refrigerant line and may r...

Page 6: ...d DHW tank should be flushed through with potable water Preventative measures should be taken against water hammer such as installing a Water Hammer Arrestor on the primary water circuit as directed by the manu facturer 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...

Page 7: ...mum allowable hot water temperature 70 C 4 70 C Declared load profile L Average climate Water heater energy efficiency class A Electrical data Control board Including 4 pumps Power supply Phase voltage frequency N 230 V 50 Hz Input 0 30 kW Current 1 95 A Breaker 10 A Booster heater Power supply Phase voltage frequency N 230 V 50 Hz 3 400 V 50 Hz N 230 V 50 Hz N 230 V 50 Hz 3 400 V 50 Hz 3 230 V 50...

Page 8: ... L 6 9 L 6 9 L 4 6 L 4 6 L 6 9 L Unvented expansion vessel Primary heating Nominal volume 12 L 12 L Charge pressure 0 1 MPa 0 1 MPa Safety device Primary circuit Control thermistor 80 C Pressure relief valve 0 3 MPa 3 bar Flow sensor Min flow 5 0 L min BH manual reset thermostat 90 C 90 C BH thermal Cut Off 121 C 121 C DHW tank Control thermistor 75 C IH manual reset thermostat Temperature Pressur...

Page 9: ... L 6 2 L Unvented expansion vessel Primary heating Nominal volume 12 L Charge pressure 0 1 MPa Safety device Primary circuit Control thermistor 80 C Pressure relief valve 0 3 MPa 3 bar Flow sensor Min flow 5 0 L min BH manual reset thermostat 90 C BH thermal Cut Off 121 C DHW tank Control thermistor 75 C IH manual reset thermostat Temperature Pressure relief valve 1 0 MPa 10 bar Connections Water ...

Page 10: ...L 4 4 L 6 7 L 4 4 L Unvented expansion vessel Primary heating Nominal volume 12 L 12 L 12 L 12 L Charge pressure 0 1 MPa 0 1 MPa 0 1 MPa 0 1 MPa Safety device Primary circuit Control thermistor 80 C Pressure relief valve Flow sensor Min flow 5 0 L min BH manual reset thermostat 90 C 90 C 90 C 90 C 90 C BH thermal Cut Off 121 C 121 C 121 C 121 C 121 C DHW tank Control thermistor 75 C IH manual rese...

Page 11: ...nstall a suitably sized primary side expansion vessel See figure 8 1 8 5 and 10 6 1 for further guidance Split model system Split model 2 zone system A B 9 10 1 11 18 22 16 6 14 D 7 2 15 4 12 13 C E F 17 30 21 23 A B 9 8 10 1 1 8 11 9 18 18 22 22 16 16 6 6 14 14 D 7 7 2 2 15 15 4 4 12 11 13 13 C H H G G 17 17 30 30 21 21 23 23 3 3 A B D C ...

Page 12: ...25 Return water temp thermistor THW2 26 DHW tank upper water temp thermistor THW5A 27 DHW tank lower water temp thermistor THW5B 28 Refrigerant liquid temp thermistor TH2 29 Pressure sensor 30 Drain pan 31 Outdoor unit 32 Drain pipe Local supply 33 Back flow prevention device Local supply 34 Isolating valve Local supply 35 Magnetic filter Local supply Recommended 36 Strainer Local supply 37 Pressu...

Page 13: ... water temp thermistor THW2 26 DHW tank upper water temp thermistor THW5A 27 DHW tank lower water temp thermistor THW5B 28 Refrigerant liquid temp thermistor TH2 29 Pressure sensor 30 Drain pan 31 Outdoor unit 32 Drain pipe Local supply 33 Back flow prevention device Local supply 34 Isolating valve Local supply 35 Magnetic filter Local supply Recommended 36 Strainer Local supply 37 Pressure relief...

Page 14: ... outlet connection 22 mm Compression B Cold water inlet connection 22 mm Compression C Space heating cooling RETURN connection 28 mm Compression D Space heating cooling FLOW connection 28 mm Compression E Flow connection FROM heat pump No plate heat exchanger 28 mm Compression F Return connection TO heat pump No plate heat exchanger 28 mm Compression G Refrigerant GAS With plate heat exchanger 12 ...

Page 15: ...or wires For inlets and run high voltage wires including power cable indoor outdoor cable and external output wires For a wireless receiver option cable and ecodan Wi Fi interface option cable use inlet 1 2 3 4 5 50 20 680 100 20 50 20 120 20 595 1750 632 120 G1 2 G1 2 HANDLE PRESSURE RELIEF VALVE PRIMARY CIRCUIT PRESSURE RELIEF VALVE SANITARY CIRCUIT MANOMETER MAIN CONTROLLER TERMINAL BLOCK FRONT...

Page 16: ...714D 6 WIRING DIAGRAM 6 1 E T VM2 E D Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 3 way valve AC motor E PT20 30X M D E ST C 30D M D 3 way valve Stepping motor E PT17X M D E ST17 20D M D 6 9 1 ...

Page 17: ...17 OCH714D 6 2 E T VM6 E D Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 3 way valve AC motor E PT20 30X M D E ST C 30D M D 3 way valve Stepping motor E PT17X M D E ST17 20D M D 6 9 1 ...

Page 18: ...18 OCH714D 6 3 E T YM9 E D Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 3 way valve AC motor E PT20 30X M D E ST C 30D M D 3 way valve Stepping motor E PT17X M D E ST17 20D M D 6 9 1 ...

Page 19: ...19 OCH714D 6 4 E T M E D Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 3 way valve AC motor E PT20 30X M D E ST C 30D M D 3 way valve Stepping motor E PT17X M D E ST17 20D M D 6 9 1 ...

Page 20: ...20 OCH714D 6 5 EH T TM9 E D Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 Table 6 9 1 3 way valve AC motor E PT20 30X M D E ST C 30D M D 3 way valve Stepping motor E PT17X M D E ST17 20D M D 6 9 1 ...

Page 21: ...FF ON OUT7 CNBH 5 7 Booster heater 2 output OFF ON OUT8 Cooling signal output OFF ON OUT9 CNIH Immersion heater output OFF ON OUT10 N O F F O t u p t u o r e l i o B OUT11 r o r r E l a m r o N t u p t u o r o r r E OUT12 t s o r f e D l a m r o N t u p t u o t s o r f e D OUT13 2 way valve 2a output 2 OFF ON OUT14 CNP4 Water circulation pump 4 output DHW OFF ON OUT15 OFF ON OUT16 Thermo ON signal...

Page 22: ...n pump 2 Space heating for Zone1 MP3 Water circulation pump 3 Space heating for Zone2 MP4 Water circulation pump 4 DHW 3WV 3 way valve AC motor E PT20 30X M D E ST C 30D M D 3 way valve Stepping motor E PT17X M D E ST17 20D M D MXV Mixing valve IHT IH Immersion heater Option IHC Contactor for immersion heater Option TH1 TH2 THW1 THW2 THW5A THW5B THW6 THW7 THW8 THW9 THW10 THWB1 IN1 Room thermostat ...

Page 23: ...ling signal output OFF ON OUT9 CNIH Immersion heater output OFF ON OUT10 N O F F O t u p t u o r e l i o B OUT11 r o r r E l a m r o N t u p t u o r o r r E OUT12 t s o r f e D l a m r o N t u p t u o t s o r f e D OUT13 2 way valve 2a output 2 OFF ON OUT14 CNP4 Water circulation pump 4 output DHW OFF ON OUT15 OFF ON OUT16 Thermo ON signal OFF ON OUTA1 V 0 1 V 0 t u p t u o g o l a n A connector T...

Page 24: ...N6 logic change Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open OFF SW3 2 Flow switch 2 and 3 input logic change Failure detection at short Failure detection at open OFF SW3 3 3 way valve type AC motor Stepping motor OFF E PT20 30X M D E ST C 30D M D ON E PT17X M D E ST17 20D M D SW3 4 Electric energy meter WITHOUT Electric energy meter WITH Electric energy meter O...

Page 25: ... 5 Circuit rating Cylinder unit Outdoor unit S1 S2 4 230 VAC Cylinder unit Outdoor unit S2 S3 4 24 VDC 3 Max 45 m If 2 5 mm used Max 50 m If 2 5 mm used and S3 separated Max 80 m 4 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 and national codes 2 Indoor unit outdoor unit connecting cords shall not be ...

Page 26: ...ax 45 m If 2 5 mm used Max 50 m If 2 5 mm used and S3 separated Max 80 m 4 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 and national codes 2 Indoor unit outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord Design 60245 IEC 57 Indoor unit power supply cords sha...

Page 27: ...DHW tank N 230 V 50 Hz 3 kW 16 A 2 2 5 mm Cylinder unit power supply N 230 V 50 Hz Cylinder unit input capacity Main switch Breaker 2 16 A Wiring No size mm Cylinder unit power supply 2 Min 1 5 Cylinder unit power supply earth 1 Min 1 5 Cylinder unit Outdoor unit 3 2 Min 0 3 Cylinder unit Outdoor unit earth Circuit rating Cylinder unit L N 4 230 VAC Cylinder unit Outdoor unit S1 S2 4 Cylinder unit...

Page 28: ...wer supply cords shall not be lighter than polychloroprene sheathed flexible cord Design 60227 IEC 53 3 Install an earth line longer than power cables 4 Please keep enough output capacity of power supply for each heater Insufficient power supply capacity might cause chattering For booster heater Primary circuit For Immersion heater DHW tank To control board 1 If the installed earth leakage circuit...

Page 29: ...f different metals insulate the joints to prevent any corrosive reaction taking place which may damage the pipework a Refer to the following section Local system b If the outdoor unit is higher than the indoor unit or if there is a location where air gets trapped in the upper part of the water pipe consider adding this part Drain Drain Cylinder unit Cold water DHW Local system a Water supply Water...

Page 30: ... b 42 37 Pa Figure 8 4 E PT20 30X M D Packaged model system Drain Drain Cylinder unit Cold water DHW Local system a Water flow Water supply Notes To enable draining of the cylinder unit an isolating valve should be positioned on both the inlet and outlet pipework Be sure to install a strainer on the inlet pipe work to the cylinder unit Suitable drain pipework should be attached to all relief valve...

Page 31: ...2 water circulation pump local supply Optional part PAC TH011 E Optional part PAC TH011 E 10 Zone2 heat emitters e g underfloor heating local supply 11 Boiler flow water temp thermistor THWB1 12 Mixing tank thermistor THW10 1 13 Boiler local supply 14 Zone1 2 way valve local supply 15 Zone2 2 way valve local supply 16 Bypass valve local supply 1 ONLY Buffer tank control heating cooling applies to ...

Page 32: ... the cylinder drain cock to safely discharge the warmed water to drain via a suitable hose 3 On completion close drain cock re fill system and resume system commissioning Filling the cylinder unit Potable DHW circuit 1 Check and charge expansion vessel 2 Check all connections including factory fitted ones are tight 3 Insulate pipework between cylinder unit and outdoor unit 4 Thoroughly clean and f...

Page 33: ...n screen 6 Increase set temperature 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 Ho...

Page 34: ...here 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 for 3 seconds the m...

Page 35: ...ting compensation curve Cooling flow temp 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 setting Heating room temp Heati...

Page 36: ...pacity ON OFF Boiler Boiler Boiler efficiency 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 Minimum Maximu...

Page 37: ...c heater 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...

Page 38: ... the unit will cease operation Selected Running Error indication Manual operation During the filling of the system the water circulation pump and 3 way valve can 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 accidenta...

Page 39: ...tected at Flow sensor Maximum The maximum flow rate to be detected at Flow sensor 1 Decreasing time before pump switched off may increase the duration of stand by in Heating Cooling mode 2 Set the Running time according to the specifications of the actuator 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 lon...

Page 40: ...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 buttons to select a refrigerant address of which you wish to configure or check the settings and press CONFIRM 1 4 The Flow sensor scr...

Page 41: ...rature set in the Flow temp range menu Fast mode is not efficient and will increase running cost compared to normal mode 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 selected temperature for this specific mode of oper...

Page 42: ...y monitor setting mode means the factory fitted pump is connected as Pump 1 so that the input is automatically calculated 3 When the cylinder unit is connected with a PUHZ FRP or PUMY models electricity consumption is not calculated internally To display the electricity consumption conduct the 2nd method When additional pumps supplied locally are connected as Pump2 3 change setting according to sp...

Page 43: ...tiple outdoor units control system only Thermistor 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 wat...

Page 44: ... Error 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 actions To dele...

Page 45: ...il Complete appears 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 pas...

Page 46: ...ating time reset 504 Indoor unit 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 Indoor unit Zone1 flow water temp THW6 39 to 88 C 510 Indoor unit Outside air temp TH7 39 to 88 C 511 Indoor unit Flow water te...

Page 47: ... 39 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...

Page 48: ... B9 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...

Page 49: ... 1 0 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 ...

Page 50: ... 1 0 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 ...

Page 51: ...1 0 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...

Page 52: ...3D 0 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 ...

Page 53: ... 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 Space heating flow temp is restarted 40 C and DHW tank temp is restricted 50 C 1 Heater Heating for DHW and space heating is provided by the heater Activating emergency oper...

Page 54: ... inferior phenomena 3 If no obvious problem can be found continue to operate the unit Note Electrical components should only be replaced as a final option Please follow instructions in 10 4 Self diagnosis and action and 10 5 Troubleshoot ing by inferior phenomena fully before resorting to replacing parts 10 2 Test Run Before a test run After installation of outdoor unit pipework and electrical wir...

Page 55: ...it for leaks Check that the flow amount is within the recommended range 3 Valve operation fault 3 Check valves on 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 ...

Page 56: ...om 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 detects a temp 3ºC for 10 consecutive s...

Page 57: ...on 1 Insufficient system head 1 Refer to table in 10 6 Checking Compo nent 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 11 DISASSEMBLY PROCEDURE for how to replace pump 2 Reduced flow in primary water circuit Due to 1 or more of the following Faulty pump insufficient air purge...

Page 58: ...tion LD Boiler temperature thermistor THWB1 THWB2 failure Refer to 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 TH011...

Page 59: ...hat was expected 30 consec utive times 1 2 or more main remote controllers 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 s...

Page 60: ...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 be flat 1 Check and replace the battery if necessary the wireless remote controller battery...

Page 61: ...ure 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 sta...

Page 62: ...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 6 WIRING DIAGRAM 1 Full of data 1 Move or delete data or replace SD memory card with a new one 2 Write protected 2 Release the write protect switch 3 NOT formatted 3 Refer to i...

Page 63: ...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 6 WIRING DIAGRAM 1 Full of data 1 Move or delete data or replace SD memory card with a new one 2 Write protected 2 Release the write protect switch 3 NOT formatted 3 Refer to i...

Page 64: ...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 water circuit components 1 Tighten connection...

Page 65: ...ot 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 11 DISASSEMBLY PROCEDURE 20 Water discharges from pressure relief valve Primary circuit 1 If continual pressure relief valve could bite foreign objects and the valve seat may be damaged 1 Turn the handle on the pressure re...

Page 66: ...thly The time of Delay set in Economy settings for pump is too short Go to Service menu Auxiliary settings 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...

Page 67: ...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 9 5 Service menu 3 External meter local supply failure 3 Check if signal is sent to IN8 to IN10 properly Refer to section 6 WIRING DIAGRAM Replace the external heat meter if defective 4 FTC board failure 4 Check t...

Page 68: ...5 Speed 5 Default setting Speed 4 Speed 3 Speed 2 Speed 1 0 10 20 30 40 50 60 70 80 0 40 35 30 25 20 15 10 5 External static pressure kPa Flow rate L min Figure 10 6 5 Speed 5 Default setting Speed 4 Speed 3 Speed 2 Speed 1 0 10 20 30 40 50 60 70 80 0 40 35 30 25 20 15 10 5 External static pressure kPa Flow rate L min Figure 10 6 6 CC3 CC2 CC1 Recommended water flow rate range Outdoor heat pump un...

Page 69: ... WHITE AWG15 FEP WHITE Terminal Normal Abnormal 1 2 26 5 3 1 3 Ω Open or Short 2 4 kW heater 230 V 1 phase 1 2 2 kW AWG15 FEP WHITE AWG15 FEP WHITE 3 4 2 kW AWG13 FEP BLUE AWG13 FEP BLUE 2 kW Terminal Normal Abnormal 1 2 26 5 3 1 3 Ω Open or Short 3 4 13 3 1 5 0 6 Ω Open or Short 3 6 kW heater 400 V 3 phase 5 6 AWG13 FEP BLUE AWG13 FEP BLUE AWG15 FEP WHITE 2 kW 4 AWG13 FEP BLUE 2 kW 2 kW 2 3 1 kW ...

Page 70: ...ne will be 11Ω and the other will be open Pressure sensor Mixing valve 1 Check if wirings are correct TBO 2 1 Black TBO 2 2 Blue TBO 2 3 Brown 2 Remove the motor part from the mixing valve and check if it functions prop erly as follows The motor dial rotates in a CW direction when 230 V is applied between brown and blue The motor dial rotates in a CCW direction when 230 V is applied between black ...

Page 71: ...re thermistor THW6 Zone1 return water temperature thermistor THW7 Zone2 flow water temperature thermistor THW8 Zone2 return water temperature thermistor THW9 0 C 15 kΩ 10 C 9 6 kΩ 20 C 6 3 kΩ 25 C 5 2 kΩ 30 C 4 3 kΩ 40 C 3 0 kΩ Thermistor R0 15kΩ 3 B constant 3480 2 Rt 15exp 3480 273 t 273 1 1 0 100 200 300 400 500 600 700 800 900 1000 30 20 10 0 10 20 30 40 50 60 70 80 Temperature C Resistance kΩ...

Page 72: ... 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 CNBHT Thermostat input for booster heater OUT11 TBO 3 5 6 Signal output Error 230 VAC OUT5 TBO 2 1 3 Mixing valve 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 230 VAC OUT2 TBO 1 3 4 Water circula...

Page 73: ... panel fixing screws Front panel Connector Remocon support Photo 2 2 Photo 2 3 11 DISASSEMBLY PROCEDURE Check individual illustrations and positions of the parts by referring to the parts catalogue Some lead wires and pipes are bundled with bands Cut the bands to undo the fastened pipes and lead wires if necessary When bundling the lead wires and pipes again use new commercially available bands Wh...

Page 74: ...connect all the lead wires from the terminal block To disconnect the S1 S2 and S3 lead wires disengage the locks by pressing on the claws 3 Remove the screw on the terminal block Note To avoid dropping of the terminal block hold the terminal block by hand when removing the screw Controller board Photo 3 2 2 Disconnect all the lead wires from the controller board 3 Remove the controller board from ...

Page 75: ...et L from the front frame L and pull the control box by lifting the left hand side to swing the control box Photo 4 3 Note Disconnect the field wiring as necessary Control box Swing Photo 4 2 Note The photos shown are of the EHST20C YM9D model Photo 4 4 Note The photos shown are of the ERST17D YM9BD model CN1A connector CNPWM connector CNP1 connector Earth cable of water pump primary circuit CNV1 ...

Page 76: ...1 gaskets Photos 5 2 and 5 3 Set the water pump in the way that the die stamped arrow facing down and the lead wire connectors to the left Photo 5 1 Be sure to change the pump and the water pump lead wire together Be sure to wipe water around the surface of the pump and the water pump lead wire thoroughly Pump valve 6 Remove the 2 screws on the pump valve stay Photo 5 1 7 E T C X series Remove the...

Page 77: ...hock or cause the 3 way valve to malfunction Photo 6 2 E T20C 20X 30 series DISASSEMBLY PROCEDURE 3 way valve motor A B Fastener Fastener O ring O ring 3 way valve O ring Fastener Strainer valve 6 Remove the 2 screws on the strainer valve stay Photo 5 1 7 Remove the strainer valve by detaching the quick con nection When reinstalling the quick connection use a new O ring Refer to Procedure 25 for h...

Page 78: ...NBHT connector on the controller board and the booster heater lead wires wired to the BHC1 Lead wire No 1 No 2 and No 3 and BHC2 Lead wire No 4 No 5 and No 6 contactors respectively and release the lead wires from the fastener the cable strap and the band Photos 8 1 and 10 1 Note Do not mix up the lead wire numbers when re connecting the lead wires to the contactors as the lead wire numbers are di...

Page 79: ...connections Inlet of booster heater and outlet of P HEX Photos 8 2 and 8 3 When reinstalling the quick connections use new O rings Refer to Procedure 25 for how to attach and detach the quick connection 6 Remove the pipe W C B H by carefully pulling it to the right Photo 8 2 7 Remove the pipe B H D V by carefully pulling it to the top Photo 8 2 8 Detach the quick connection upper F S to make the c...

Page 80: ...o cover the terminals again 3 Pull out the thermostat Immersion heater 4 Remove the tab cover and remove the back nut G1 3 4 using the tool included with the immersion heater Photo 9 3 5 Pull out the immersion heater When reinstalling the immersion heater use a new G1 3 4 gasket Note When replacing the immersion heater only skip Step 2 After reinstalling the back nut with the tab cover onto the ta...

Page 81: ...screws on it Photo 10 1 E ST20 30 series Remove the DIV frame by cutting the band and removing 4 screws on it Photo 10 6 ERST17D BD series 5 Cut the bands bundling the pipes Photos 10 1 10 2 and 10 6 6 Remove the 2 flare nuts on the refrigerant piping on top of the cylinder unit Photo 10 3 Photo 10 2 Photo 10 3 DIV frame Screws Screws Bands Top panel Flare nuts P HEX Continue to the next page Scre...

Page 82: ...er pump and the pump valve Refer to Procedure 5 13 Remove the quick connection on 3 way valve to make the connection part free Photo 6 1 and 6 2 When reinstalling the quick connection use a new O ring Refer to Procedure 25 for how to attach and detach the quick connection 14 Remove the booster heater Refer to Procedure 8 15 Remove the water coil cover the W C top cover Only E T C series and the pu...

Page 83: ...ut use a new G1 4 gasket Photo 12 1 4 Remove the 2 screws and remove the manometer stay with the manometer from the front frame L by sliding it upward Photos 12 1 5 Remove the manometer from the manometer stay while pressing on the 2 claws Photo 12 2 When reinstalling the manometer assembly on the unit beware not to put strain on the root of the capillary tube as the capillary tube is easy to brea...

Page 84: ...he other to turn the pressure relief valve 10 bar Photo 12 8 6 Eliminate loctite on the thread surfaces using remover Photo 12 8 Before reinstallation apply loctite over the thread surface on the pressure relief valve For more details about the loctite and the remover refer to Page 87 Pressure relief valve 5 bar Except for ERST17D BD model 3 Remove the pressure relief valve with a flare joint usin...

Page 85: ... specified Photo 14 1 For more details about the loctite and the remover refer to Page 87 13 How to remove the expansion vessel 1 Remove the front panel Refer to Procedure 1 2 Swing the control box to the front Refer to Procedure 4 3 Remove 2 tapes Photo 13 1 The removed tape can be disposed of 4 Remove the flare nut using 2 spanners one to hold the flare joint and the other to turn the flare nut ...

Page 86: ... drain cock Photo 16 2 17 How to remove the drain cock sanitary circuit 1 Remove the front panel Refer to Procedure 1 DHW tank side 2 Remove the drain cock by detaching the quick connection Photo 17 1 When reinstalling the quick connection use a new O ring Refer to Procedure 25 for how to attach and detach the quick connection P HEX Water Water side 2 Remove the drain cock from the P HEX Water Wat...

Page 87: ... Photo 4 2 3 Release the water pump lead wire from the cable clamp and the cable strap in the control box the cable strap the fastener and the band below the control box Photos 4 1 10 1 and 10 6 4 Remove the pipe tank W C by remove the 2 G3 4 nuts Photo 19 When reinstalling the G3 4 nuts use a new G3 4 gaskets 5 Remove the 2 screws to remove the st band Photo 19 6 Remove the 2 screws to remove the...

Page 88: ...he water pump Refer to Procedure 19 6 Rotate pipe W P Tank side up 7 Remove the 3 screws Right side and screw fixing the S T W P support Photos 20 1 and 20 2 8 Remove the scale trap with the S T W P support Photo 20 2 9 Remove the screws and the saddle band then remove the scale trap Photo 20 2 When reinstalling the G1 nut use a new G1 gasket Reuse the saddle band and the screws Photo 20 1 Photo 2...

Page 89: ...d wires from cable clamps and bands Photos 21 1 and 21 3 TH2 CN21 cable clamp cable strap coated clamp and band THW1 THW2 CNW12 cable clamp cable strap coat ed clamp and band THW5A THW5B CNW5 cable clamp cable strap coated clamp and band 3 Remove the thermistors from the thermistor holders Photos 21 1 and 21 2 Photo 21 1 Photo 21 2 Thermistor THW2 Thermistor THW5B Thermistor TH2 Bands Photo 21 3 T...

Page 90: ...er 2 Remove the side panel top 3 Remove the side panel under Screws Side panel Right Screws Side panel Left Screws V M plate Photo 22 2 Screws Screws Top panel 23 How to remove the drain pan 1 Remove the front panel Refer to Procedure 1 Remove the front panel under only for ER T30 series 2 Remove the side panel left Refer to Procedure 22 Remove the side panel left under only for ER T30 series 3 Re...

Page 91: ...d remove the 2 screws that hold the back panel onto the frame Then pull out the back panel while lifting the top panel Photos 24 1 and 24 2 Note The handles are removed by pushing them up Photo 24 1 Handles Top panel Screws Back panel Screws Top panel Photo 24 2 Top panel Screw Back panel Note The photo shows the left side The opposite side also has the screw to be removed on the same position Scr...

Page 92: ...if dirt or foreign matters are found on the sealing surface where the O ring touches 3 Apply grease on the O ring using a plastic bag etc Photo 25 4 4 Attach the O ring to the male part of quick connection Photo 25 5 Keep the O ring free from dirt or foreign matters 5 Connect the male and female parts of the quick connection Photo 25 6 6 Attach the clip Photo 25 7 Ensure to attach the wider diamet...

Page 93: ...rol box Photo 4 4 3 Release the water pump lead wire from the cable clamp the fastener and the cable strap in the control box and the cable strap the fastener and the band below the control box Photos 4 1 10 6 and 27 4 Remove the water pump by removing the two G1 nuts using the 2 spanners one to hold the G1 nut and the other to turn the other side of G1 nut Remove the water pump by sliding it vert...

Page 94: ...hoto 28 2 When reinstalling the G1 nuts use new G1 gaskets Be sure to change the pump and the mixing valve lead wire together Be sure to wipe water around the surface of the pump and the water pump lead wire thoroughly Note Before replacing the mixing valve be sure to power off the cylinder unit Failure to do so may cause electric shock or cause the mixing valve to malfunction Photo 28 1 Photo 28 ...

Page 95: ...o Procedure 1 2 Disconnect the relay connector THW6 7 8 9 under the control box Photo 4 4 3 Release the water pump lead wire from the cable clamp the fastener and the cable strap in the control box and the cable strap the fastener and the band below the control box Photos 4 1 10 6 and 30 4 Remove the thermistors from the thermistor holders Photo 30 Photo 30 94 OCH714D Thermistor THW9 Thermistor TH...

Page 96: ... on the threads let the seal ant sit until soft and then eliminate it with a wire brush Note When using the products above refer to the appropriate manuals that come with the individual products Table 11 2 Part name 1 Recommended tightening torque Nm 2 PRESSURE RELIEF VALVE 3 bar 15 1 PRESSURE RELIEF VALVE 5 bar 15 1 PRESSURE RELIEF VALVE 10 bar 15 1 TEMPERATURE AND PRESSURE RELIEF VALVE 15 1 1 Fo...

Page 97: ...output wire OUT10 Boiler operation to the input room thermostat input on the boiler 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 t...

Page 98: ...Zone2 outdoor ambient temp 2 30 C to 33 C 6 15 C Zone2 flow temp 2 20 C to 60 C 40 C Lo flow temp set point Zone1 outdoor ambient temp 28 C to 35 C 7 35 C Zone1 flow temp 20 C to 60 C 25 C Zone2 outdoor ambient temp 2 28 C to 35 C 7 35 C Zone2 flow temp 2 20 C to 60 C 25 C Adjust Zone1 outdoor ambient temp 29 C to 34 C 8 Zone1 flow temp 20 C to 60 C Zone2 outdoor ambient temp 2 29 C to 34 C 8 Zone...

Page 99: ...mp rise 1 to 5 C 3 C Intelligent settings 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 Boiler efficiency 25 to 150 80 Booster heater 1 capacity 0 to 30 kW 2 kW Booster heater 2 capacity 0 to 30 kW 4 ...

Page 100: ...ture control is enabled when DIP SW2 6 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 ou...

Page 101: ...tion 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 Check integrity of water pipework and insulation 4 Check all electrical connectio...

Page 102: ...ud trap WARNING DRAINED WATER MAY BE VERY HOT 1 Turn OFF the unit via the user interface 2 Turn OFF the circuit breaker 3 Check if upper and lower parts of the mud trap are still screwed tight a c 4 Take off the magnetic sleeve b 5 Unscrew the drain cap e 6 Connect a drain hose to the bottom of the mud trap so that the water and dirt can be collected in a suitable bottle 7 Open the drain valve for...

Page 103: ...BISHI ELECTRIC CORPORATION Issued Nov 2021 No OCH714 REVISED EDITION D Issued Jun 2021 No OCH714 REVISED EDITION C Issued Oct 2020 No OCH714 REVISED EDITION B Issued Mar 2020 No OCH714 REVISED EDITION A Published Nov 2019 No OCH714 Made in Japan Specifications are subject to change without notice ...

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Mitsubishi Electric ecodan EHPT17X-VM2D, Service Manual

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