Mitsubishi Electric ecodan EHPX-VM2C Service Manual Download Page 70

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Photo 8-8(E*SD series)

Photo 8-9(E*SD series)

Plate heat exchanger

assembly (inside)

DISASSEMBLY PROCEDURE

PHOTOS

Pump support

Plate heat exchanger

8. How to remove the plate heat exchanger(continued)

<E*SD series>

(12) Remove the flare nuts on the gas and liquid pipes

under the hydrobox using two spanners: one to hold

each flare joint and the other to turn each flare nut.

(13) Remove the plate heat exchanger with water coil cover

by lifting it upward after removing the 2 screws on the

water coil cover. (Photos 8-7 and 8-8)

(14) Remove the water coil cover and the water coil base by

removing the 6 screws. (Photo 8-9)

Water coil cover

Water coil base

Screws

OCH571

Summary of Contents for ecodan EHPX-VM2C

Page 1: ...cribes only service data of Hydrobox RoHS compliant products have G mark on the spec name plate R410A MAIN REMOTE CONTROLLER PARTS CATALOG OCB571 HYDROBOX Model name EHSD MEC EHSD VM2C EHSC MEC EHSC VM2C EHSC VM2EC EHSC VM6C EHSC VM6EC EHSC YM9C EHSC YM9EC EHSC TM9C ERSD VM2C ERSC MEC ERSC VM2C EHPX VM2C EHPX YM9C Service Ref EHSD MEC UK EHSD VM2C UK EHSC MEC UK EHSC VM2C UK EHSC VM2EC UK EHSC VM6...

Page 2: ... PUHZ HW112 140YHA2R1 BS PUHZ HW112 140YHA2R3 BS PUHZ HW112 140YHA2R4 BS PUHZ HW140VHA BS PUHZ HW140VHA2 BS PUHZ HW140VHA2R1 BS PUHZ HW140VHA2R2 BS PUHZ HW140VHA2R3 BS PUHZ HW140VHA2R4 BS PUHZ SW40 50VHA BS OCH525 PUHZ SW40 50VHAR1 BS PUHZ SW75 100 120VHA BS OCH533 PUHZ SW100 125YHA BS PUHZ SW100 125YHAR1 BS PUHZ SHW80 112VHA OCH526 PUHZ SHW80 112VHAR2 BS UK PUHZ SWH112 140YHA R1 PUHZ SWH112 140YH...

Page 3: ...e mechanical failure or system malfunction or unit breakdown In the worst case this could lead to a serious impediment to securing product safety In heating mode to avoid the heat emitters being damaged by excessively hot water set the target flow temperature to a minimum of 2ºC below the maximum allowable temperature of all the heat emitters For Zone2 set the target flow temperature to a minimum ...

Page 4: ...e Use the following tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Contact your nearest dealer for any questions Tools for R410A Gauge manifold Flare tool Charge hose Size adjustment gauge Gas leak detector Vacuum pump adapter Torque wrench Electronic refrigerant charging scale Be sure to use the correct tools If dust debris or...

Page 5: ...ng should be performed with the 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 perfo...

Page 6: ...5 mm 9 52 mm 6 35 mm 9 52 mm Gas 12 7 mm 15 88 mm 12 7 mm 15 88 mm Target tempera ture range Flow temperature Heating 25 60 C Cooling 5 25 C Room temperature Heating 10 30 C Cooling NOT available Guaranteed oper ating range Ambient 1 0 35 C 80 RH Outdoor temperature Heating See outdoor unit spec table Cooling See outdoor unit spec table min 10 C 2 Electrical data Control board Power supply Phase v...

Page 7: ... VM2C ERSC MEC EHPX M C 1 Control and electrical box 2 Main controller 3 Plate heat exchanger Refrigerant Water 4 Water circulation pump 1 5 Pump valve 6 Drain cock Primary circuit 7 Booster heater 1 2 8 Flow sensor 9 Manometer 10 Pressure relief valve 3bar 11 Automatic air vent 12 Expansion vessel 13 Strainer valve 14 Drain pan Table 4 1 Figure 4 1 Figure 4 2 Figure 4 3 OCH571 ...

Page 8: ...direct DHW tank primary return connection 28 mm Compression EHS and EHPX G1 nut ERS B Space heating Indirect DHW tank primary flow connection 28 mm Compression EHS and EHPX G1 nut ERS C Refrigerant Liquid 6 35 mm Flare E SD 9 52 mm Flare E SC D Refrigerant Gas 12 7 mm Flare E SD 15 88 mm Flare E SC E Flow connection from heat pump 28 mm Compression EHPX F Return connection to heat pump 28 mm Compr...

Page 9: ...ameter Dimension mm a 200 b 150 c 500 d 500 Sufficient space MUST be left for the provision of discharge pipework as detailed in National and Local building regulations The hydrobox must be located indoors and in a frost free environment for example in a utility room OCH571 ...

Page 10: ...ocal supply IN8 Electric energy meter 1 Local supply IN9 Electric energy meter 2 Local supply IN10 Heat meter Local supply FLOW TEMP CONTROLLER FTC5 TBO 1 4 Terminal block Outputs TBI 1 3 Terminal block Signal Inputs Thermistor F1 Fuse T10AL250V F2 Fuse T6 3AL250V SW1 5 DIP switch See Table 3 X1 15 Relay LED1 Power supply FTC5 LED2 Power supply Main controller LED3 Communication FTC5 Outdoor unit ...

Page 11: ...1 Power supply FTC5 LED2 Power supply Main controller LED3 Communication FTC5 Outdoor unit LED4 Reading or writing data to SD card CNPWM Pump speed control signal for MP1 CN108 SD card connector Table 1 Signal Inputs Name Terminal block Connector Item OFF Open ON Short IN1 TBI 1 13 14 Room thermostat 1 input Refer to SW2 1 in Table 3 DIP Switch Functions IN2 TBI 1 11 12 Flow switch 1 input Refer t...

Page 12: ...tch See Table 3 X1 15 Relay LED1 Power supply FTC5 LED2 Power supply Main controller LED3 Communication FTC5 Outdoor unit LED4 Reading or writing data to SD card CNPWM Pump speed control signal for MP1 CN108 SD card connector Table 1 Signal Inputs Name Terminal block Connector Item OFF Open ON Short IN1 TBI 1 13 14 Room thermostat 1 input Refer to SW2 1 in Table 3 DIP Switch Functions IN2 TBI 1 11...

Page 13: ...5 Relay LED1 Power supply FTC5 LED2 Power supply Main controller LED3 Communication FTC5 Outdoor unit LED4 Reading or writing data to SD card CNPWM Pump speed control signal for MP1 CN108 SD card connector Table 1 Signal Inputs Name Terminal block Connector Item OFF Open ON Short IN1 TBI 1 13 14 Room thermostat 1 input Refer to SW2 1 in Table 3 DIP Switch Functions IN2 TBI 1 11 12 Flow switch 1 in...

Page 14: ...1 Power supply FTC5 LED2 Power supply Main controller LED3 Communication FTC5 Outdoor unit LED4 Reading or writing data to SD card CNPWM Pump speed control signal for MP1 CN108 SD card connector Table 1 Signal Inputs Name Terminal block Connector Item OFF Open ON Short IN1 TBI 1 13 14 Room thermostat 1 input Refer to SW2 1 in Table 3 DIP Switch Functions IN2 TBI 1 11 12 Flow switch 1 input Refer t...

Page 15: ...r Inactive Active 2 OFF SW2 6 Mixing tank WITHOUT Mixing tank WITH Mixing tank OFF SW2 7 2 zone temperature control Inactive Active 6 OFF SW2 8 Flow sensor WITHOUT Flow sensor WITH Flow sensor ON SW3 SW3 1 Room thermostat 2 input IN6 logic change Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open OFF SW3 2 Flow switch 2 input IN3 logic change Failure detection at shor...

Page 16: ...Circuit rating Hydrobox Outdoor unit S1 S2 3 230 V AC Hydrobox Outdoor unit S2 S3 3 24 V 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 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...

Page 17: ...unction install a breaker with that function along the same power line 3 phase Figure 7 5 Electrical connections 3 phase Hydrobox power supply N 230 V 50 Hz Hydrobox input capacity Main switch Breaker 1 16 A Wiring Wiring No size mm Hydrobox power supply 2 Min 1 5 Hydrobox power supply earth 1 Min 1 5 Hydrobox Outdoor unit 2 2 Min 0 3 Hydrobox Outdoor unit earth Circuit rating Hydrobox L N 3 230 V...

Page 18: ...which will damage the pipework EHS Split model system ERS Split model system for heating and cooling EHPX Packaged model system Local system Refrigerant pipe Water supply Water supply DHW DHW Drain Drain Drain Drain Cold water Cold water Water pipe Water pipe Hydrobox Hydrobox Flare connections Local system No Part name EHS MEC EHS M C EHSC M EC ERS VM2C ERSC MEC EHPX M C 1 Control and electrical ...

Page 19: ... supply 2 Mixing tank local supply 3 Zone1 flow water temp thermistor THW6 4 Zone1 return water temp thermistor THW7 5 Zone1 water circulation pump local supply 6 Zone1 flow switch local supply 7 Motorized mixing valve local supply 8 Zone2 flow water temp thermistor THW8 9 Zone2 return water temp thermistor THW9 Optional part PAC TH011 E Optional part PAC TH011 E 10 Zone2 water circulation pump lo...

Page 20: ...aking place which will damage the pipework 5 Check for leaks If leaks are found retighten the screws on the connections 6 Pressurise system to 1 bar 7 Release all trapped air using air vents during and following heating period 8 Top up with water as necessary If pressure falls below 1 bar Filling the System Primary Circuit Draining the Hydrobox WARNING DRAINED WATER MAY BE VERY HOT 1 Before attemp...

Page 21: ... 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 option screen 6 Increase desired temperature 7 Decrease desired temperature 8 Z1 Z2 Pressing the function button below this icon switch...

Page 22: ...e icons The highlighted icon will appear as a larger version of the center of the screen Press CONFIRM to select and edit the highlighted mode Follow the Main Controller Menu Tree for further setting using buttons for scrolling or F1 to F4 for selecting 9 3 Main Settings Menu The main settings menu can be accessed by pressing the MENU button To re duce the risk of untrained end users altering the ...

Page 23: ...p DHW max operation time DHW mode restriction Active Non active Heating room temp Heating flow temp Heating compensation curve Cooling flow temp Heating room temp Heating flow temp Heating 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...

Page 24: ...ay Running Interval Flow t Ambient ON OFF Ambient ON OFF Hybrid settings Ambient Energy price CO2 emission Heat source Schedule Electricity Electricity Heat pump capacity ON OFF Electric 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 ener...

Page 25: ...3 way valve When filling of the DHW tank is complete the installer should access this menu again and press F3 to deactivate manual operation of the part Alternatively after 2 hours manual operation mode will no longer be active and FTC will resume control of the part Many functions can not be set whilst the indoor unit is running The installer should turn off the unit before trying to set these fu...

Page 26: ...d 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 longer t...

Page 27: ...eed 2 Press CONFIRM 3 Press F3 and F4 buttons to select a refrigerant address of which you wish to configure or check the settings and press CONFIRM 1 4 The Pump speed screen is displayed 5 Use F2 and F3 buttons to set the pump speed of the water circulation pump between 1 and 5 1 For multiple outdoor units control system only Heat source setting screen Heat source setting The default heat source ...

Page 28: ...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 C 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 operation Col...

Page 29: ...heater 1 Pump1 2 Pump2 Pump3 Defult 2kW 4kW 0kW factory fitted pump 0kW 0kW EHSD MEC 0kW 0kW 0kW 1 When additional pumps supplied locally are connected as Pump2 3 change setting ac cording to specs of the pumps EHSD VM2C 2kW 0kW 0kW EHSC MEC 0kW 0kW 0kW 1 EHSC VM2C 2kW 0kW 0kW 1 EHSC VM2EC 2kW 0kW 0kW 1 EHSC VM6C 2kW 4kW 0kW 1 EHSC VM6EC 2kW 4kW 0kW 1 EHSC YM9C 3kW 6kW 0kW 1 EHSC YM9EC 3kW 6kW 0kW...

Page 30: ... room temperature THW7 Zone 1 return water temperature TH2 Refrigerant return temperature THW8 Zone 2 flow water temperature THW1 Water flow temperature THW9 Zone 2 return water temperature THW2 Water return temperature THWB1 Boiler flow water temperature THW5 DHW tank water temperature THWB2 Boiler return water temperature TH7 Ambient outdoor temperature External input settings menu screen Demand...

Page 31: ...compensation curve FSout Freeze stat function ambient temperature COR CO Cooling flow temperature Error history Error history allows the service engineer to view previous Error codes the unit address and the date on which they occurred Up to 16 Error 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 Pre...

Page 32: ...til 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 pa...

Page 33: ...om temp TH1A 39 88 C 505 Indoor unit Ref 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...

Page 34: ... 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 00...

Page 35: ... 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 00...

Page 36: ...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 37: ...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 38: ...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 533 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 45 xx 0 1 ...

Page 39: ... 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 40: ...ion is now deactivated Emergency operation In emergency operation an operation without connecting outdoor unit and main 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 operation mode To ...

Page 41: ...10 5 Trouble shooting 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 42: ...ow to check Open purge valve to remove trapped air Check the strainer for blockages Check the primary water circuit for leaks Check that the flow amount is within the rec ommended 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 local supply actuator fault 5 1 Ele...

Page 43: ...be defective when Room temp is 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 Cooling LP FS OS Error code displayed when THW...

Page 44: ...witched on 1 Insufficient 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 ...

Page 45: ... 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 status of the boiler 4 Boiler failure 4 Check the status of the boiler 5 FTC board failure 5 Replace board LH Boiler circulation water freeze protection Flow rate of the heating circuit from the boiler may be reduced Check for water leakage strainer ...

Page 46: ... or more main controllers have been connected to the FTC 1 Only connect 1 main controller to 1 FTC indoor unit board 2 Fault with main 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 indep...

Page 47: ...wireless 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 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 b...

Page 48: ... 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 FTC is off See 6 WIRING DIAGRAM When...

Page 49: ...AM 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 section 5 8 in instal lation manual 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...

Page 50: ...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 connections as required 2 Water circuit components reaching the end of life 2 Refer to PARTS CATALOG in the service manual for expected part lifetimes and replace them as necessary 13 Heating system...

Page 51: ...amaged 1 Turn the handle on the pressure relief valve to check for foreign objects in it If the problem is not still solved 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 1 bar if necessary If bladder perished replace expansion vessel with a new one 20 Water discharges fro...

Page 52: ...t temperature Cooling operation 3ºC higher than the preset temperature Stop 5ºC higher than the preset temperature Recover 32 The energy monitor value seems not cor rect 1 Incorrect setting of the energy monitor 1 Check the setting by following the procedure below 1 Check if the DIP switch is set as the table below Consumed electric energy SW3 4 Electric energy meter Local supply OFF Without ON Wi...

Page 53: ...al static pressure Speed 5 Default Speed 4 Speed 3 Speed 2 Speed 1 External static pressure kPa Flow rate L min Flow rate L min Flow rate L min External static pressure kPa External static pressure kPa EHSC series EHSD series ERSC series ERSD series EHPX series Speed 5 Default Speed 4 Speed 3 Speed 2 Speed 1 Flow rate L min External static pressure kPa Speed 5 Default Speed 4 Speed 3 Speed 2 Speed...

Page 54: ...WG18 AWG18 9 10 Terminal Normal Abnormal 9 10 110 35 mΩ Open or Short 2kW heater 230V 1 phase 1 2 2kW AWG15 FEP WHITE AWG15 FEP WHITE Terminal Normal Abnormal 1 2 26 5 3 1 3 Ω Open or Short 2 4kW heater 230V 1 phase 1 2 2kW AWG15 FEP WHITE AWG15 FEP WHITE 3 4 2kW AWG13 FEP BLUE AWG13 FEP BLUE 2kW 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 6kW heater ...

Page 55: ...es of 10 30 C Flow sensor Thermistor Normal Abnormal TH1 4 3 9 5 kΩ Open or short TH2 THW1 THW2 THW5 THW6 THW7 THW8 THW9 THWB1 40 100 kΩ Open or short THWB2 Yellow White Green Brown Flow signal V 5V DC CN1A 1 4 Flow signal 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 0 0 20 40 60 80 100 Flow l min Flow output signal V 0 35V 55 OCH571 ...

Page 56: ...hermistor THW1 Return water temperature thermistor THW2 DHW tank temperature thermistor THW5 Zone 1 flow water temperature thermistor THW6 Zone 1 return water temperature thermistor THW7 Zone 2 flow water temperature thermistor THW8 Zone 2 return water temperature thermistor THW9 0 C 15kΩ 10 C 9 6kΩ 20 C 6 3kΩ 25 C 5 2kΩ 30 C 4 3kΩ 40 C 3 0kΩ Thermistor R0 15kΩ 3 B constant 3480 2 Rt 15exp 3480 27...

Page 57: ...put IN4 TBI 1 7 8 Demand control input IN3 TBI 1 9 10 Flow switch 2 input IN1 TBI 1 13 14 Room thermo stat input CNBC Signal output for booster heater 230V AC OUT11 TBO 3 3 4 Signal output Error 230V AC OUT5 TBO 2 1 3 Mixing valve Local supply 1 2 Close 230VAC 2 3 Open 230VAC CNP4 OUT14 Water circulation pump4 230V AC OUT3 TBO 1 5 6 Water circulation pump3 Local supply 230V AC OUT2 TBO 1 3 4 Water...

Page 58: ...as necessary Refer to Draining the Hydrobox on page 20 When draining the hydrobox keep water from splashing on the internal parts mainly electric parts and insulations DISASSEMBLY PROCEDURE Photo 1 1 Photo 1 2 Photo 2 2 Photo 2 3 Photo 2 1 1 How to remove the front panel 1 Remove the 2 screws at the bottom of the hydrobox Photo 1 1 2 Slightly lift and pull out the front panel from the hydrobox Pho...

Page 59: ...ropping 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 FTC 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 block Note T...

Page 60: ...racket R and 2 screws from the control box bracket L 3 Release the coated clamp 4 Disengage the control box bracket R from the right hand side panel and pull the control box At this point lifting slightly and pulling the control box will swing the control box to the front Photo 4 2 Note Remove the field wiring as necessary Coated clamp Earth cable Bracket R Side panel Screw Screws Photo 4 2 Contro...

Page 61: ...he die stamped arrow facing down and the terminal box facing to the left Photo 5 2 When opening or closing the pump valve ensure to do so fully not halfway Pump valve 6 Remove the screws fixing the pump valve stay Photo 5 2 7 Remove the pump valve by detaching the quick connec tion Photo 5 2 When reinstalling the quick connection use new O ring When the pump valve handle is stiff turn the handle 9...

Page 62: ...e 90 degrees clockwise mainly by using a spanner When reinstalling the G1 nuts use new G1 gaskets Photo 5 3 Set the water pump in the way that the die stamped arrow facing to the left and the terminal box facing to the upper side Photo 5 2 When opening or closing the pump valve and strainer valve ensure to do so fully not halfway Pump valve 6 Remove the screws fixing the pump valve stay Photo 5 5 ...

Page 63: ...feed the lead wire out the control box without putting strain on the CN1A connector Photo 6 1 4 Swing the control box to the front Refer to Procedure 4 5 Remove the flow switch by removing the nut Photo 6 2 When reinstalling the nut use a new O ring Photo 6 3 Set the flow sensor in the orientation of the arrow printed on the flow sensor and in the way that the sensor part faces to the left Photo 6...

Page 64: ...nnection use new O ring Refer to page 77 for how to attach and detach the quick connection 9 Remove the two screws that hold the heater stay onto the back panel Lift the booster heater slightly and remove the booster heater with the heater stay from the back panel Photo 7 2 and 7 3 10 Remove the 2 screws on the back of the heater stay and remove the heater stay from the booster heater Photo 7 3 Re...

Page 65: ...e the booster heater with the heater stay and the pipe to B H from the back panel Photo 7 4 and 7 5 8 Remove the pipe to B H from the booster heater by detaching the quick connection 3 Photo 7 4 When reinstalling the quick connection use new O ring Refer to page 77 for how to attach and detach the quick connection Reuse the removed pipe to B H 9 Remove the 2 screws on the back of the heater stay a...

Page 66: ...Remove the pipe W C W P and the pipe P V B H by detaching the quick connections When reinstalling the quick connections use new O rings Refer to page 77 for how to attach and detach the quick connection Photo 8 2 ERSC series Water coil cover Earth cable Cable clamps Cable strap Cable strap Coated clamp Lead wire CNPWM connector Water pump connector CNP1 Pump valve Water pump Nut G1 Nut G1 Screws S...

Page 67: ...STR W C by detaching the quick connection for the pipe and heat exchanger then slide it to the right Photo 8 2 When reinstalling the quick connection use new O ring Refer to page 77 for how to attach and detach the quick connection 9 Remove the TH2 thermistor from the thermistor holder Photo 8 3 10 Remove the flare nuts on the gas and liquid pipes under the hydrobox using two spanners one to hold ...

Page 68: ... the water coil cover by removing the 3 screws Photo 8 5 11 Remove the 2 screws on the strainer valve stay Photo 8 6 12 Pull out the plate heat exchanger assembly with the strainer valve from the hydrobox by lifting it upward Photo 8 6 13 Remove the strainer valve from the plate heat exchanger assembly by detaching the quick connection Photos 8 4 and 8 6 When reinstalling the quick connection use ...

Page 69: ...e quick connection 8 Close the strainer valve Photo 8 7 When the strainer valve handle is stiff turn the handle 90 degrees clockwise mainly by using a spanner Photo 8 5 When opening or closing the strainer valve ensure to do so fully not halfway 9 Remove the saddle band upper the strainer by removing the 2 screws Photo 8 7 10 Detach the quick connection for the L joint Lower and the plate heat exc...

Page 70: ... nuts on the gas and liquid pipes under the hydrobox using two spanners one to hold each flare joint and the other to turn each flare nut 13 Remove the plate heat exchanger with water coil cover by lifting it upward after removing the 2 screws on the water coil cover Photos 8 7 and 8 8 14 Remove the water coil cover and the water coil base by removing the 6 screws Photo 8 9 Water coil cover Water ...

Page 71: ... 4 When reinstalling the quick connection use new O ring Refer to page 77 for how to attach and detach the quick connection Reuse the removed strainer valve stay and the strainer valve stay fixing screws Photos 9 2 and 9 5 Removal of the strainer cover debris recovery 4 Remove the cover with two spanners one to hold the strainer valve and the other to turn the cover Photos 9 1 and 9 4 Be sure to r...

Page 72: ...hem upward Photo 9 6 When reinstalling the quick connection use new O ring Refer to page 77 for how to attach and detach the quick connection 7 Remove the L joint by detaching the quick connection and remove the strainer valve stay by removing the 2 screws Photo 9 7 When reinstalling the quick connection use new O ring Refer to page 77 for how to attach and detach the quick connection Reuse the re...

Page 73: ...t of the capillary tube as the capillary tube is easy to break at the root Pressure relief valve 3 Remove the field piping from the pressure relief valve 4 Remove the manometer by removing the G1 4 nut When reinstalling the G1 4 nut use a new G1 4 gasket Photo 10 2 5 Remove the pressure relief valve with a flare joint using two spanners one to hold the flare joint and the other to turn the flare n...

Page 74: ...sion vessel hold the expansion vessel with the metal support by hand when removing the last screw 5 Pull out the metal support Photo 11 1 6 Pull out the expansion vessel Photo 11 1 7 Remove the flare joint from the expansion vessel Photo 11 2 When reinstalling the flare joint use a new G3 8 gasket Note To avoid dropping of the expansion vessel hold it securely when removing it Photo 11 2 Expansion...

Page 75: ... THW2 and TH2 lead wires from the cable clamp the 2 cable straps and the coated clamp Feed the lead wires out the control box without putting strain on their connectors 5 Swing the control box to the front Refer to Procedure 4 6 Remove the thermistors from the thermistor holders Photos 13 2 13 3 and 13 4 Earth leakage breakers ECB1 Connectors CN21 CNW12 THW2 thermistor Cable clamp Cable strap Cabl...

Page 76: ...cover plate Photo 14 4 7 Remove 3 screws each on the side panel L R and 2 screws on the underneath surface and base assy from the hydrobox Photo 14 5 8 Remove 5 screws on the base assy Photo 14 6 9 Remove the drain pan from the base Photo 14 7 10 Remove the 2 screws fixing strainer valve holder and remove the strainer valve holder Photo 14 2 Reuse removed the strainer valve holder and the strainer...

Page 77: ...face where the O ring touches 3 Apply grease on the O ring using a plastic bag etc Photo 15 4 4 Attach the O ring to the male part of quick connection Pho to 15 5 Keep the O ring free from dirt or foreign matters 5 Connect the male and female parts of the quick connection Photo 15 6 6 Attach the clip Photo 15 7 Ensure to attach the wider diameter of the clip to the fe male side Failure to do so it...

Page 78: ...nt on the threads let the sealant 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 3bar 15 1 1 For more details about the listed parts refer to the parts catalogue 2 Undertightening and overtightening the pa...

Page 79: ...s 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 choose Boiler or Hybrid 4 2 Go to Service menu Operation settings Boiler settings to make detailed settings for Hybrid above 4 The Hybrid automatically switches heat sources between Heat pump and Electric heate...

Page 80: ...C Lo flow temp set point Zone1 outdoor ambient temp 28 C 35 C 4 35 C Zone1 flow temp 25 C 60 C 25 C Zone2 outdoor ambient temp 1 28 C 35 C 4 35 C Zone2 flow temp 25 C 60 C 25 C Adjust Zone1 outdoor ambient temp 29 C 34 C 5 Zone1 flow temp 25 C 60 C Zone2 outdoor ambient temp 1 29 C 34 C 5 Zone2 flow temp 1 25 C 60 C Holiday DHW 13 Active Non active Non active Heating Cooling 12 Active Non active A...

Page 81: ... dry up function On Off 6 Off Target temp Start Finish 25 60 C 30 C Max temp 25 60 C 45 C Max temp period 1 20 days 5 days Flow temp Increase Temp increase step 1 10 C 5 C Increase interval 1 7 days 2 days Flow temp Decrease Temp decrease step 1 10 C 5 C Decrease interval 1 7 days 2 days Energy monitor settings Electric heater capacity Booster heater 1 capacity 0 30kW 2kW Booster heater 2 capacity...

Page 82: ...mp unit maintenance record sheet Model number Serial number Mechanical Frequency Notes 1 Inspect grill heat exchanger fins and air inlet for trapped debris damage 2 Check condensate drain provision 3 Check integrity of water pipe work and insulation 4 Check all electrical connections 5 Check and record the operation voltage All the above checks should be carried out once a year Note Within the fir...

Page 83: ...83 OCH571 ...

Page 84: ... 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2014 MITSUBISHI ELECTRIC CORPORATION Distributed in Oct 2014 No OCH571 Made in Japan New publication effective Oct 2014 Specifications are subject to change without notice ...

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Mitsubishi Electric ecodan EHPX-VM2C, Service Manual

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