Mitsubishi Electric ecodan EHPT20X- VM2HB Service Manual Download Page 1

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SERVICE MANUAL

CYLINDER UNIT

No. OCH531

CONTENTS

1. REFERENCE MANUAL ................................... 2

2. SAFETY PRECAUTION ................................... 3

3. SPECIFICATIONS ............................................ 6

4. PART NAMES AND FUNCTIONS .................. 7

5. OUTLINES AND DIMENSIONS ..................... 10

6. WIRING DIAGRAM .........................................11

7. FIELD WIRING ............................................... 24

8. WATER SYSTEM DIAGRAM ......................... 28

9. CONTROLS ................................................... 33

10. TROUBLESHOOTING ................................... 53

11. DISASSEMBLY PROCEDURE ...................... 69

12. SUPPLEMENTARY INFORMATION ............. 85

13. SERVICE AND MAINTENANCE ................... 86

September 2012

Note:

•

This manual describes only

service data of cylinder unit.

•

RoHS compliant products have

<G> mark on the spec name
plate.

R410A

MAIN CONTROLLER

PARTS CATALOG (OCB531)

[Model name]

EHST20C-VM6HB

EHST20C-YM9HB

EHST20C-VM6B

EHST20C-YM9B

EHST20C-VM6EB

EHST20C-YM9EB

EHST20C-VM6SB

EHPT20X-VM2HB

EHPT20X-VM6HB

EHPT20X-YM9HB

EHPT20X-VM6B

EHPT20X-YM9B

[Service Ref.]

EHST20C-VM6HB.UK
EHST20C-YM9HB.UK
EHST20C-VM6B.UK
EHST20C-YM9B.UK
EHST20C-VM6EB.UK
EHST20C-YM9EB.UK
EHST20C-VM6SB.UK
EHPT20X-VM2HB.UK
EHPT20X-VM6HB.UK
EHPT20X-YM9HB.UK
EHPT20X-VM6B.UK
EHPT20X-YM9B.UK

CYLINDER UNIT

Summary of Contents for ecodan EHPT20X- VM2HB

Page 1: ...2012 Note This manual describes only service data of cylinder unit RoHS compliant products have G mark on the spec name plate R410A MAIN CONTROLLER PARTS CATALOG OCB531 Model name EHST20C VM6HB EHST20C YM9HB EHST20C VM6B EHST20C YM9B EHST20C VM6EB EHST20C YM9EB EHST20C VM6SB EHPT20X VM2HB EHPT20X VM6HB EHPT20X YM9HB EHPT20X VM6B EHPT20X YM9B Service Ref EHST20C VM6HB UK EHST20C YM9HB UK EHST20C VM...

Page 2: ...HRP100 125YHA2 PUHZ HRP100 125YHA2R1 PUHZ W50 85VHA BS OCH439 PUHZ W50 85VHAR1 BS PUHZ W50VHAR2 BS PUHZ W85VHA2 UK OCH465 PUHZ W85VHA2 BS UK PUHZ HW112 140YHA BS OCH439 PUHZ HW112 140YHA2 BS PUHZ HW112 140YHA2R1 BS PUHZ HW112 140YHA2R3 BS PUHZ HW140VHA BS PUHZ HW140VHA2 BS PUHZ HW140VHA2R1 BS PUHZ HW140VHA2R2 BS PUHZ HW140VHA2R3 BS PUHZ SW40 45VHA BS OCH525 PUHZ SW75 100 120VHA BS OCH533 PUHZ SW10...

Page 3: ...heavy items on top of the cylinder unit When installing or relocating or servicing the cylinder unit use only the specified refrigerant R410A 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 result in an explosio...

Page 4: ...t use thin pipes Refer to section 4 5 in the installation manual Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing Leave elbow joints etc in their packag ing If dust debris or moisture enters the refrigerant lines oil deterioration or compressor breakdown may result Use ester oil ether oil alkylbenzene oil small amount as the re...

Page 5: ...performed with the refrigerant cylinder of syphon stood vertically Refrigerant is charged from liquid phase 3 Service tools Use the service tools below as exclusive tools for R410A refrigerant No Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3 MPa G or over 2 Charge hose Only for R410A Use pressure perfor...

Page 6: ...m 15 88 mm 15 88 mm 15 88 mm 15 88 mm Target temperature range Flow temperature Heating 25 60 C Cooling Room temperature Heating 10 30 C Cooling Guaranteed operating range Ambient 1 0 35 C 80 RH Outdoor temperature Heating See outdoor unit spec table Cooling DHW tank performance 2 Time to raise DHW tank temp 15 65 C 21 75 min Time to reheat 70 of DHW tank to 65 C 16 min Electrical data Control boa...

Page 7: ...anometer A DHW outlet B Cold water inlet E Inlet from space heating F Outlet to space heating J Refrigerant Gas K Refrigerant Liquid 2 1 4 5 8 A B E F J K 9 10 11 17 12 13 14 15 16 18 19 EHST20C M EB Split model system without expansion vessel Number Component 1 Automatic air vent 2 Pressure relief valve 4 Main controller 5 Control and electrical box 8 DHW tank 9 3 way valve 10 Water circulation p...

Page 8: ...let from space heating F Outlet to space heating G Inlet from heat pump H Outlet to heat pump 2 1 3 4 5 8 A B E F J K 9 10 11 17 12 13 14 15 16 18 C D 19 EHST20C VM6SB Solar split model system Number Component 1 Automatic air vent 2 Pressure relief valve 3 Expansion vessel 4 Main controller 5 Control and electrical box 8 DHW tank 9 3 way valve 10 Water circulation pump 11 Manual air vent 12 Booste...

Page 9: ...l and electrical box 7 Immersion heater Only for EHPT20X M HB 8 DHW tank 9 3 way valve 10 Water circulation pump 11 Manual air vent 12 Booster heater 13 Drain cock Booster heater 14 Strainer valve 15 Flow switch 16 Drain cock Primary circuit 17 Drain cock DHW tank 19 Manometer A DHW outlet B Cold water inlet E Inlet from space heating F Outlet to space heating G Inlet from heat pump H Outlet to he...

Page 10: ...LIQUID With plate heat exchanger 9 52 mm Flare L Electrical cable inlets For inlets and run low voltage wires including external input wires and thermistor wires For inlets and run high voltage wires including power cable indoor outdoor cable and external output wires For a wireless receiver option cable use inlet Left side Front Right side L H K G J F E D C B A 63 3 561 7 509 7 491 1 449 7 123 67...

Page 11: ...oom thermostat 2 Field supply IHT Thermostat ﬁxed temp for immersion heater IN7 Flow switch 3 Field supply IH Immersion heater FLOW TEMP CONTROLLER FTC4 IHC Contactor for immersion heater TBO 1 2 Terminal block Outputs TBI 1 2 Terminal block Signal Inputs Thermistor F1 F2 Fuse T6 3AL250V SW1 4 Dip switch See 6 13 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main control...

Page 12: ...ation pump 2 output Space heating for Zone1 OFF ON OUT3 TBO 1 7 8 Water circulation pump 3 output Space heating for Zone2 OFF ON OUT4 TBO 1 9 11 CNV1 3 way valve output Heating DHW OUT5 TBO 1 12 13 Mixing valve output Stop Close TBO 1 13 14 Stop Open OUT6 CNBH 1 3 Booster heater 1 output OFF ON OUT7 CNBH 5 7 Booster heater 2 output OFF ON OUT8 TBO 2 11 12 Booster heater 2 output OFF ON OUT9 TBO 2 ...

Page 13: ...RED RED BLU BLU No 3 WHT No 2 WHT No 1 BLU No 4 RED RED VLT VLT PNK PNK GRY GRY ORN BHC2 IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF BH2 2 4 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater N 230V 50Hz 2 2 2 2 1 3 5 7 1 5 X1 X2 X3 X4 X5A X12 X11 X6 X8 X7 TBO 2 5 3 1 F1 F2 CN01 BLK Signal output Error Signal output Defrost Sig...

Page 14: ... BLK RED BLU BLU No 4 WHT No 2 WHT No 1 BLU No 5 WHT No 3 BLU No 6 RED VLT VLT PNK PNK GRY GRY ORN BHC2 IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF BH2 2 4 6 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater 3 400V 50Hz 2 2 2 2 1 3 5 7 X1 X2 X3 X4 X5A X12 X11 X6 X8 X7 5 3 1 F1 F2 CN01 BLK Signal output Error Signal output Defr...

Page 15: ...d supply BHCP Contactor for booster heater protection IN6 Room thermostat 2 Field supply IHT Thermostat ﬁxed temp for immersion heater Option IN7 Flow switch 3 Field supply IH Immersion heater Option FLOW TEMP CONTROLLER FTC4 IHC Contactor for immersion heater Option TBO 1 2 Terminal block Outputs TBI 1 2 Terminal block Signal Inputs Thermistor F1 F2 Fuse T6 3AL250V SW1 4 Dip switch See 6 13 Dip s...

Page 16: ... thermostat Field supply BHCP Contactor for booster heater protection IN6 Room thermostat 2 Field supply IHT Thermostat ﬁxed temp for immersion heater Option IN7 Flow switch 3 Field supply IH Immersion heater Option FLOW TEMP CONTROLLER FTC4 IHC Contactor for immersion heater Option TBO 1 2 Terminal block Outputs TBI 1 2 Terminal block Signal Inputs Thermistor F1 F2 Fuse T6 3AL250V SW1 4 Dip switc...

Page 17: ...RED RED BLU BLU No 3 WHT No 2 WHT No 1 BLU No 4 RED RED VLT VLT PNK PNK GRY GRY ORN BHC2 IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF BH2 2 4 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater N 230V 50Hz 2 2 2 2 1 3 5 7 1 5 X1 X2 X3 X4 X5A X12 X11 X6 X8 X7 TBO 2 5 3 1 F1 F2 CN01 BLK Signal output Error Signal output Defrost Sig...

Page 18: ... 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 2 2 2 2 ECB1 L 1 N 3 L 1 N 3 ECB2 BHCP ORN RED BLU BLU BLU RED BLU WHT No 2 WHT No 1 RED RED VLT VLT GRY GRY ORN IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF 2 4 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater N 230V 50Hz 2 2 2 1 3 5 7 1 5 X1 X2 X3 X4 X5A X12 X11 X6 X8 X7 TBO 2 5...

Page 19: ...ch setting IN4 TBI 1 7 8 Demand control input Normal Heat source OFF Boiler operation 2 IN5 TBI 1 9 10 Outdoor thermostat input 1 Standard operation Heater operation Boiler operation 2 IN6 TBI 1 11 12 Room thermostat 2 input Refer to SW3 1 in 6 13 Dip switch setting IN7 TBI 1 13 14 Flow switch 3 input Zone2 Refer to SW3 3 in 6 13 Dip switch setting 1 If using outdoor thermostat for controlling ope...

Page 20: ... 3 4 5 6 7 8 9 10 11 12 13 14 2 2 2 2 2 ECB1 L1 1 L2 3 L3 5 L 1 N 3 ECB2 BHCP ORN RED BLU WHT BLK RED WHT BLK RED BLU BLU No 4 WHT No 2 WHT No 1 BLU No 5 WHT No 3 BLU No 6 RED VLT VLT PNK PNK GRY GRY ORN BHC2 IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF BH2 2 4 6 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater 3 400V 50Hz 2 2...

Page 21: ...ED BLU BLU No 3 WHT No 2 WHT No 1 BLU No 4 RED RED VLT VLT PNK PNK GRY GRY ORN BHC2 IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF BH2 2 4 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater N 230V 50Hz 2 2 2 2 1 3 5 7 1 5 X1 X2 X3 X4 X5A X12 X11 X6 X8 X7 TBO 2 5 3 1 F1 F2 CN01 BLK Signal output Error Signal output Defrost Signal o...

Page 22: ...U BLU No 4 WHT No 2 WHT No 1 BLU No 5 WHT No 3 BLU No 6 RED VLT VLT PNK PNK GRY GRY ORN BHC2 IHC BHC1 BHT IHT IH 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 6 4 2 5 3 1 A1 A2 BH1 A B BHF BH2 2 4 6 2 4 Power supply to Immersion heater N 230V 50Hz Power supply to Booster heater 3 400V 50Hz 2 2 2 2 1 3 5 7 X1 X2 X3 X4 X5A X12 X11 X6 X8 X7 5 3 1 F1 F2 CN01 BLK Signal output Error Signal output Defrost Signal ...

Page 23: ...OUT Wireless remote controller WITH Wireless remote controller OFF SW2 SW2 1 Room thermostat1 input IN1 logic change Zone1 operation stop at thermostat short Zone1 operation stop at thermostat open OFF SW2 2 Flow switch1 input IN2 logic change Failure detection at short Failure detection at open ON SW2 3 Booster heater capacity restriction Inactive Active OFF Except EHPT20X VM2HB ON EHPT20X VM2HB ...

Page 24: ...be provided Use earth leakage breaker NV The breaker shall be provided to ensure disconnection of all active phase conductors of the supply 2 Max 45 m If 2 5 mm used Max 50 m If 2 5 mm used and S3 separated Max 80 m 3 The values given in the table above are not always measured against the ground value Note 1 Wiring size must comply with the applicable local and national codes 2 Indoor unit outdoor...

Page 25: ...tact separation in each pole shall be provided Use earth leakage breaker NV The breaker shall be provided to ensure disconnection of all active phase conductors of the supply 2 Max 45 m If 2 5 mm used Max 50 m If 2 5 mm used and S3 separated Max 80 m 3 The values given in the table above are not always measured against the ground value Note 1 Wiring size must comply with the applicable local and n...

Page 26: ... A 1 6 0 mm Immersion heater DHW tank N 230 V 50 Hz 3 kW EH T20 VM H 16 A 1 2 5 mm Cylinder unit power supply N 230 V 50 Hz Cylinder unit input capacity Main switch Breaker 1 16 A Wiring 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 2 2 Min 0 3 Cylinder unit Outdoor unit earth Circuit rating Cylinder unit L N 3 230V AC ...

Page 27: ...it S1 S2 3 Cylinder unit Outdoor unit S2 S3 3 24V DC 1 A breaker with at least 3 0 mm contact separation in each pole shall be provided Use earth leakage breaker NV The breaker shall be provided to ensure disconnection of all active phase conductors of the supply 2 Max 120 m 3 The values given in the table above are not always measured against the ground value Note 1 Wiring size must comply with t...

Page 28: ...HW1 22 THW2 23 THW5 24 TH2 25 Outdoor unit 26 Drain pipe field supply 27 Cold water inlet pipe 28 DHW outlet connection 29 Back flow prevention device field supply 30 Isolating valve field supply 31 Magnetic filter field supply recommended 32 Solar panel field supply 33 Solar hydraulic kit kit to be compatible for use with FTC 4 field supply 37 Pressure relief valve 10 bar accessory 1 Refer to pag...

Page 29: ...ions When using components made from different metals or connecting pipes made of different metals insulate the joints to prevent any corro sive reaction taking place which may damage any pipework Filling loop s flexible hose must be removed fol lowing the filling procedure Item provided with unit as loose accessory Install the inlet control group item 35 above the level of the T P relief valve it...

Page 30: ...ipe 28 DHW outlet connection 29 Back flow prevention device field supply 30 Isolating valve field supply 31 Magnetic filter field supply recommended 34 Strainer field supply 37 Pressure relief valve 10 bar accessory 1 Refer to page 31 Note To enable draining of the cylinder unit an isolating valve should be positioned on both the inlet and outlet pipework No valve should be fitted between the pres...

Page 31: ...rn water temp thermistor THW7 option 5 Zone1 water circulation pump field supply 6 Zone1 flow switch field supply 7 Motorized mixing valve field supply 8 Zone2 flow water temp thermistor THW8 option 9 Zone2 return water temp thermistor THW9 option 10 Zone2 water circulation pump field supply 11 Zone2 flow switch field supply 12 Zone2 heat emitters e g underfloor heating field supply 13 Boiler flow...

Page 32: ... flush procedure 1 Energise system to heat up cylinder contents to a temperature of approx 30 40 C 2 Flush drain the water contents to remove any residue impurities resulting from the installation works Use 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 un...

Page 33: ...egionella prevention mode is active 2 Heat pump Heat pump is running Defrosting Emergency heating 3 Electric heater When this icon is displayed the Electric heaters booster or immersion heater are in use 4 Target temperature Target flow temperature Target room temperature Compensation curve 5 OPTION Pressing the function button below this icon will dis play the quick view menu 6 Increase desired t...

Page 34: ...ting Temp setting DHW Schedule timer preview Day select Time setting Time setting DHW 2 1 Period Schedule timer preview Day select Time setting Time setting Holiday mode DHW active non active Heating active non active Holiday menu Zone1 Heating room temp Heating flow temp Zone2 Heating room temp Heating flow temp Initial settings Date Time yyyy mm dd hh mm Language ENG FR GER SW SP IT DA NL FIN NO...

Page 35: ...Boiler settings Hybrid settings Outdoor ambient temp 2 Priority Ambient Cost CO2 Intelligent settings Energy price Electricity Boiler Schedule CO2 emission Electricity Boiler Heat source Heat pump capacity Boiler efficiency Booster heater 1 capacity Booster heater 2 capacity Floor dry up function ON OFF For more details refer to Page 41 Target temp Start Finish Max temp Max temp period Flow temp I...

Page 36: ...ctions If the installer attempts to change the settings whilst the unit is running the main controller will display a reminder message prompting the installer to stop operation before continuing By selecting Yes the unit will cease operation Manual operation During the filling of the system the water circulation pump 3 way valve and mixing valve can be manually overridden using manual operation mo...

Page 37: ...This function allows adjustments to be made to the thermistor readings from 10 10 C in 0 5 C intervals 1 From the Service menu highlight Thermistor Adjustment 2 Press CONFIRM 3 Use F1 and F2 to select thermistor 4 Press CONFIRM 5 Use F2 and F3 to change the thermistor temperature 6 Press CONFIRM Auxiliary settings This function is used to set the parameters for any auxiliary parts used in the syst...

Page 38: ...ting screen Pump speed setting screen Pump speed From the Auxiliary settings menu highlight water circulation pump speed Press CONFIRM Press F3 and F4 buttons to select a refrigerant address of which you wish to configure or check the settings and press CONFIRM Press CONFIRM The Pump speed screen is displayed Use F2 and F3 buttons to set the pump speed of the water circulation pump between 1 to 5 ...

Page 39: ... for DHW This operation is only available if BOTH a DHW tank AND immersion heater are present on the system From the Operation settings menu use F1 and F2 buttons to scroll through the list until Simultaneous operation is highlighted Press CONFIRM Simultaneous operation screen is displayed To switch simultaneous operation ON OFF press F1 To alter the temperature at which simultaneous operation sta...

Page 40: ...ration settings menu use F1 and F2 buttons to scroll through the list until Room temp control HEATING is highlighted Press CONFIRM 3 Use F1 and F2 keys to scroll through the menu selecting each subtitle in turn by pressing CONFIRM See the table below for description of each setting 4 Enter the desired number using the function keys and press CONFIRM 1 Room temp control HEATING screen Menu subtitle...

Page 41: ...et flow temp 1 10 ºC 5 Increase interval c Sets the period for which the same target flow temp is maintained 1 7 day 2 Flow temp decrease Flow temp decrease step d Sets the decrease step of the target flow temp 1 10 ºC 5 Decrease interval e Sets the period for which the same target flow temp is maintained 1 7 day 2 Target temperature Start Finish f Sets the target flow temp at the start and the fi...

Page 42: ...n Explanation Abbreviation Explanation HWtemp DHW max temp Z2 mode Operation mode HWdrop DHW temperature drop HER Heating room temp HWtime DHW max operation time HE Heating flow temp NO HW DHW mode restriction HCC Heating compensation curve HWset DHW operation mode Normal Eco COR CO Ltemp Legionella hot water temp Hroom 1 Heating target room temp Lfreq Legionella operation Frequency Hroom 2 Heatin...

Page 43: ...t the password you entered or have to service a unit somebody else installed you can reset the password to the factory default of 0000 From the main settings menu scroll down the functions until Service Menu is highlighted Press CONFIRM You will be prompted to enter a password Hold down buttons F3 and F4 together for 3 secs You will be asked if you wish to continue and reset the password to defaul...

Page 44: ...ghted Press CONFIRM Use F1 F2 and F3 buttons to select a menu to write to the main controller Press CONFIRM to start downloading Wait for a few minutes until Complete appears 1 4 5 Main RC SD From the SD card setting use F1 and F2 buttons to scroll through list until Main RC SD is highlighted Press CONFIRM Use F1 F2 and F3 buttons to select a menu to write to the SD memory card Press CONFIRM to st...

Page 45: ... liquid temp TH2 39 88 C 506 Indoor unit Return water temp THW2 39 88 C 507 Indoor unit Zone 2 room temp TH1B 39 88 C 508 Indoor unit DHW tank water temp THW5 39 88 C 509 Indoor unit Zone 1 flow water temp THW6 39 88 C 510 Indoor unit Outside air temp TH7 39 88 C 511 Indoor unit Flow water temp THW1 39 88 C 512 Indoor unit Zone 1 return water temp THW7 39 88 C 513 Indoor unit Zone 2 flow water tem...

Page 46: ... 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 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 00 49 ...

Page 47: ... 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 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 00 C9 ...

Page 48: ...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 48 1...

Page 49: ...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 C8 1...

Page 50: ...5 xx 0 1 1 0 1 0 0 0 16 xx 1 1 1 0 1 0 0 0 17 xx 0 0 0 1 1 0 0 0 18 xx 1 0 0 1 1 0 0 0 19 xx 0 1 0 1 1 0 0 0 1A xx 1 1 0 1 1 0 0 0 1B xx 0 0 1 1 1 0 0 0 1C xx 1 0 1 1 1 0 0 0 1D xx 0 1 1 1 1 0 0 0 1E xx 1 1 1 1 1 0 0 0 1F xx 0 0 0 0 0 1 0 0 20 xx 1 0 0 0 0 1 0 0 21 xx 0 1 0 0 0 1 0 0 22 xx 1 1 0 0 0 1 0 0 23 xx 0 0 1 0 0 1 0 0 24 xx 1 0 1 0 0 1 0 0 25 xx 0 1 1 0 0 1 0 0 26 xx 1 1 1 0 0 1 0 0 27 xx...

Page 51: ... 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 1 0 ...

Page 52: ...h breakers if cylinder pow ered independently Change DIP switch SW4 5 to OFF Switch ON the breaker s Emergency operation is now deactivated Emergency operation Boiler In Emergency operation mode the outdoor heat pump unit will not operate Heat ing for space heating is provided by the boiler When in Emergency operation the main control has NO control functions It s only function is to display the M...

Page 53: ... 10 5 Troubleshooting by 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 Tables 10 4 and 10 5 Error Codes and Inferior Phenom ena fully before resorting to replacing parts 10 2 Test Run Before a test run After installation of outdoor unit pipework and electrical w...

Page 54: ... primary water circuit 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 field 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 ...

Page 55: ... chosen for the Heating op eration and when Main 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 LP FS OS Error code displayed when THW1 detects a temp 1ºC for 10 consecutiv...

Page 56: ...sufficient system head 1 Refer to table in section 10 6 to determine if system pump meets requirements If more head required either add an 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 blocked strainer leak in water c...

Page 57: ...B1 THWB2 failure Refer to error 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 FTC4 OUT10 and the boiler 2 See the manual of the thermistors PAC TH011HT E 3 Boiler fuel has run out or the sy...

Page 58: ... is powered independ ently from the outdoor unit If the E3 E5 code is still displayed the FTC4 and or the main controller circuit board should be replaced 3 Fault with the main controller circuit board 4 Electrical noise causes interference with transmission reception of data for main controller E6 Indoor outdoor communication failure Reception error Error code E6 is displayed if after the power i...

Page 59: ...ers to the address of the wireless remote controller that has the error E g Error 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 2 The wireless remote controller is out of range of the wireless receive...

Page 60: ...screen appears with a press of the ON button but disappears in a second The main 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 shortly 4 LED2 on FTC4 is off See 6 WIRING DIAGR...

Page 61: ...lot 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 5 Using SD memory card LED4 on FTC4 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 p...

Page 62: ...ld water pipe Insulate re route pipework 12 Water leakage 1 Poorly sealed connections of water circuit components 1 Tighten connections as required 2 Water circuit components reaching the end of life 2 Refer to PARTS CATALOG for expected part lifetimes and replace them as necessary 13 Heating system does not reach the set temperature 1 Prohibit schedule timer or holiday mode se lected 1 Check sett...

Page 63: ...ges 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 relief valve several turns If leakage persists replace the pressure relief valve with a new one 2 If intermittent expansion vessel charge may have reduced bladder perished 2 Check pressure in expansion vessel Recharge to ...

Page 64: ...er circulation pump Use manual and automatic air vents to remove air from system Top up water if necessary to achieve 1 bar on primary circuit 24 Noise during hot water draw off typically worse in the morning 1 Loose airing cupboard pipework 1 Install extra pipe fastening clips 2 Heaters switching on off 2 Normal operation no action necessary 25 Mechanical noise heard coming from the cylinder unit...

Page 65: ...er circulation pump characteristics Recommended water flow rate range Outdoor heat pump unit Water flow rate range L min Packaged PUHZ W50 7 1 14 3 PUHZ W85 10 0 25 8 PUHZ HW112 14 4 27 7 PUHZ HW140 17 9 27 7 Split PUHZ RP35 7 1 11 8 PUHZ RP50 7 1 17 2 PUHZ RP60 8 6 20 1 PUHZ H RP71 10 2 22 9 PUHZ H RP100 14 4 27 7 PUHZ H RP125 17 9 27 7 PUHZ RP140 20 1 27 7 PUHZ SW40 7 1 11 8 PUHZ SW50 7 1 17 2 P...

Page 66: ... 1kW 1kW AWG13 FEP BLUE AWG13 FEP BLUE Terminal Normal Abnormal 1 2 2 3 1 3 105 8 11 8 5 Ω Open or Short 4 5 5 6 4 6 52 9 5 8 2 5 Ω Open or Short Earth leakage circuit breaker for heater If a short circuit occurs on the booster heater immersion heater or each power line a short circuit breaker will trip and power source will be blocked Eliminate the causes of short circuit and then turn on the bre...

Page 67: ... water temperature thermistor THWB2 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k Thermistor Characteristics Charts Room temperature thermistor TH1 Liquid refrigerant temperature thermistor TH2 Flow water temperature thermistor THW1 Return water temperature thermistor THW2 DHW tank temperature thermistor THW5 Zone 1 flow water temperature thermistor THW6 Zone 1 return water temp...

Page 68: ...stor Zone1 return water temp THW6 TBI 2 7 8 Thermistor Zone1 flow water temp THWB2 TBI 2 5 6 Thermistor Boiler return water temp THWB1 TBI 2 3 4 Thermistor Boiler flow water temp THW8 TBI 2 1 2 Thermistor Zone2 flow water temp IN6 TBI 1 11 12 Room thermo stat 2 input IN5 TBI 1 9 10 Outdoor ther mostat input IN4 TBI 1 7 8 Demand control input IN3 TBI 1 5 6 Flow switch 2 input IN1 TBI 1 1 2 Room the...

Page 69: ... VM6HB EHPT20X YM9HB EHPT20X VM6B EHPT20X YM9B Check individual illustrations and positions of the parts by referring to the parts catalog included in this manual 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 When removing the parts associated wi...

Page 70: ...avoid dropping of the contactors hold the contac tors by hand when removing the last screws To prevent an electrical shock wait until all the LED lamps on the FTC4 control board are turned off Terminal block Photo 3 2 4 Disconnect 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 5 Remove the screw on the terminal bloc...

Page 71: ...m the left hand side frame Photo 4 1 6 Slightly lift and pull out the control box from the cylinder unit while tilting the control box backward When swinging the control box to the front 3 Remove the screw on the bracket R Photo 4 1 4 Remove the band Photo 4 1 5 Disengage the tab on the control box bracket R from the right hand side frame and pull the control box by lifting the right hand side to ...

Page 72: ...w Set the water pump in the orientation of the arrow printed on the water pump and in the way that the terminal box faces to the front Pump valve 5 Remove the pump valves by removing the G1 nuts using two spanners one to hold each valve and the other to turn each G1 nut w When reinstalling the G1 nuts use new G1 gaskets Photo 5 3 w When either of the pump valve handles is stiff remove the individu...

Page 73: ...y valve by removing the three G1 nuts in the order of the bottom middle and top using two spanners one to hold the 3 way valve and the other to turn each nut Photo 6 2 w When reinstalling the G1 nuts use new G1 gaskets A and B shown represent the bottom and the top directions of the 3 way valve respectively Note Before replacing the motor be sure to power off the cylinder unit Failure to do so may...

Page 74: ...w When the valve handle is stiff remove the handle and turn the vertical stem 90 degree mainly by using a span ner Photo 5 2 6 Remove the flow switch by loosening the nut Photo 7 1 w When reinstalling the flow switch use a new O ring Photo 7 2 Note To ensure the correct functioning of the flow switch check the following when installing it The flow switch paddle is set perpendicularly to the water ...

Page 75: ...Hold the top of the booster heater using a pipe wrench and turn the flare nut using a spanner Photo 8 3 7 Remove the two screws on the heater stay Lift the booster heater slightly and remove the booster heater from the heater stay Photo 8 4 8 Remove the drain cock from the booster heater Photo 8 3 w Replace the removed drain cock primary circuit The reused drain cock could cause water leakage Phot...

Page 76: ...n heater Photo 9 2 5 Pull out the immersion heater w 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 tank insert the immersion heater straight into the tank through the back nut in order to provide adequate sealing Failure to do so may cause water leakage Always chec...

Page 77: ...FF the strainer valve handle under w When the valve handle is stiff remove the handle and turn the vertical stem 90 degree mainly by using a spanner Photo 5 2 8 Remove the G1 nut at the booster heater side of the flexible hose Photo 10 2 w When reinstalling the G1 nut use a new G1 gasket 9 Remove the G1 nut under the strainer valve Photo 10 2 w When reinstalling the G1 nut use a new G1 gasket 10 R...

Page 78: ...er valve handle Strainer valve handle 11 How to remove the strainer 1 Remove the front panel Refer to Procedure 1 2 Close OFF the 2 strainer valves w When either of the strainer valve handles is stiff remove the individual handles and turn the individual stems 90 degree mainly by using an adjustable spanner Photo 5 2 3 Remove the two G1 nuts using two spanners one to hold the strainer and the othe...

Page 79: ...ve Photo 12 2 w When reinstalling the G1 4 nut use a new G1 4 gasket Photo 12 2 5 Remove the pressure relief valve with a flare joint using two spanners the one to hold the flare joint and the other to turn the flare nut Photo 12 2 6 Remove the pressure relief valve using two spanners one to hold the flare joint and the other to turn the pressure relief valve Photo 12 4 7 Eliminate locktite on the...

Page 80: ...et 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 the flare nut using two spanners one to hold the flare joint and the other to turn the flare nut 4 Displace the pipe slightly downward and pull out the expansion vessel 5 Remove the flare joint from the expansion vessel w When reinstalling the fl...

Page 81: ...le hose Between the plate heat exchanger and the booster heater 1 Remove the plate heat exchanger from the cylinder unit Refer to Procedure 10 2 Remove the flexible hose from the plate heat exchanger by removing the G1 nut Photo 18 2 w When reinstalling the G1 nuts use new G1 gaskets DHW tank side 1 Remove the left hand side panel Refer to Procedure 20 2 Disconnect the flexible hose by turning the...

Page 82: ...lowing thermistor connectors on the controller board and release the lead wires from cable clamps and bands TH2 TH2 cable clamp cable strap fastener and band THW1 THW2 THW12 cable clamp cable strap fastener and band THW5 THW5 cable clamp cable strap fastener and band 4 Remove the thermistors from the thermistor holders Photo 19 1 Photo 19 2 Thermistor THW1 Thermistor THW2 Thermistor THW5 Thermisto...

Page 83: ... be removed by the same procedure 21 How to remove the back panel 1 Remove the front panel Refer to Procedure 1 2 Remove the side panels Refer to Procedure 20 3 Remove the 4 screws 2 each at the front and back on the top panel 4 Remove the 2 screws on the back panel and pull out the back panel while lifting the top panel Note The handles are removed by pushing them up Photo 21 Screws Side panel Ri...

Page 84: ...en 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 3bar 15 1 TEMPERATURE AND PRESSURE RELIEF VALVE 15 1 1 For more details about the listed parts refer to the parts catalogue included in this manual 2 Undertightening and overtight...

Page 85: ...it 3 Connect the output wire OUT10 Boiler operation to the input room thermostat input on the boiler 2 4 Install one of the following room temp thermostats 3 Wireless remote controller option Room temp thermostat field supply Main controller remote position 1 The boiler temp thermistor is an optional part 2 OUT10 has no voltage across it 3 Boiler heating is controlled on off by the room temp therm...

Page 86: ...outdoor ambient temp 15 C 35 C 35 C Zone1 flow temp 25 C 60 C 25 C Zone2 outdoor ambient temp 1 15 C 35 C 35 C Zone2 flow temp 25 C 60 C 25 C Adjust Zone1 outdoor ambient temp 14 C 34 C Zone1 flow temp 25 C 60 C Zone2 outdoor ambient temp 1 14 C 34 C Zone2 flow temp 1 25 C 60 C Holiday DHW Active Non active Non active Heating Active Non active Active Zone1 heating room temp 10 C 30 C 15 C Zone2 he...

Page 87: ... 999 kWh 0 5 kWh Boiler 0 001 999 kWh 0 5 kWh CO2 emission Electricity 0 001 999 kg CO2 kWh 0 5 kg CO2 kWh Boiler 0 001 999 kg CO2 kWh 0 5 kg CO2 kWh Heat source Heat pump capacity 1 40 kW 11 2 kW Boiler efficiency 25 150 80 Booster heater 1 capacity 1 20 kW 2 kW Booster heater 2 capacity 1 20 kW 4 kW Floor dry up function On Off 4 Off Target temp Start Finish 25 60 C 30 C Max temp 25 60 C 45 C Ma...

Page 88: ... electricity supply Controller Frequency Notes 1 Check field settings against factory recommendations 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 C...

Page 89: ...89 OCH531 ...

Page 90: ... 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Sep 2012 No OCH531 Made in Japan New publication effective Sep 2012 Specifications are subject to change without notice ...

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