Mitsubishi Electric ecodan EHSC-TM9B Service Manual Download Page 69

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DISASSEMBLY PROCEDURE

PHOTOS

Photo 3-3

3. How to remove the electrical parts

(Steps (1) through (3) are applied to all the following parts.)

(1) Remove the front panel. (Refer to Procedure 1).
(2) Remove the 4 screws holding the control box cover.

(Photo 3-1)

(3) Slightly lift and pull out the control box cover. (Photo 3-1)

<Earth leakage circuit breaker> (Photo 3-2)

(4) Disconnect all the lead wires from the earth leakage cir-

cuit breaker.

(5) Remove the 2 screws on the earth leakage circuit break-

er.

Note: To avoid dropping of the breaker, hold the breaker by

hand when removing the last screws.

<Contactor>

(Photo 3-2)

(4) Disconnect all the lead wires from the contactors.
(5) Remove the 2 screws on each contactor.

Note:

To avoid dropping of the contactors, hold the contactors
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 block.

Note: To avoid dropping of the terminal block, hold the termi-

nal block by hand when removing the screw .

<Controller board> (Photo 3-3)

(4) Disconnect all the lead wires from the controller board.
(5) Remove the controller board from the 6 board supports.

Photo 3-2

The photos shown are of the EHSC model.

Terminal block (TB1)

Earth leakage circuit
breaker (ECB1)

Contactors

Control box

Controller
board

Screw

Photo 3-1

Control box cover
fixing screws

Control box cover fixing screws

Control box
cover

Controller
board

OCH532A

Summary of Contents for ecodan EHSC-TM9B

Page 1: ... January 2013 Note This manual describes only service data of Hydrobox RoHS compliant prod ucts have G mark on the spec name plate R410A MAIN CONTROLLER PARTS CATALOG OCB532 HYDROBOX Please void OCH532 Revision EHSC VM2B UK and EHSC TM9B UK have been added in REVISED EDITION A Some descriptions have been modified Model name EHSC VM2B EHSC VM6B EHSC YM9B EHSC TM9B EHSC VM6EB EHSC YM9EB EHPX VM2B EH...

Page 2: ... PUHZ HRP100 125YHA PUHZ 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 1...

Page 3: ...and or fire could occur Do not place any heavy items on top of the hydrobox When installing or relocating or servicing the hydrobox 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 lin...

Page 4: ... 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: ...uid 9 52 mm 9 52 mm Gas 15 88 mm 15 88 mm Target temperature range Flow temperature Heating 25 60 C Cooling 5 25 C Room temperature Heating 10 30 C Cooling Not available Guaranteed operating 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 voltage frequency N 230 V 50...

Page 7: ...ck 9 Water circulation pump 10 Pressure relief valve 11 Flow switch 12 Plate heat exchanger 13 Strainer valve A Inlet from space heating Indirect DHW tank pri mary return B Outlet to space heating Indirect DHW tank primary flow C Refrigerant Liquid D Refrigerant Gas E Discharge from pressure relief valve installer to pipe connect to suitable drain point 1 2 3 6 5 7 8 9 11 10 12 13 E EHSC M B Split...

Page 8: ...m space heating Indirect DHW tank pri mary return B Outlet to space heating Indirect DHW tank primary flow C Refrigerant Liquid D Refrigerant Gas E Discharge from pressure relief valve installer to pipe connect to suitable drain point 6 7 8 9 11 10 E EHSC M EB Split model system without expansion vessel For installation of this model make sure to install a primary side expansion vessel in the fiel...

Page 9: ...p 10 Pressure relief valve 11 Flow switch 13 Strainer valve A Inlet from space heating Indirect DHW tank pri mary return B Inlet from heat pump C Outlet to heat pump D Outlet to space heating Indirect DHW tank primary flow E Discharge from pressure relief valve installer to pipe connect to suitable drain point 1 2 3 EHPX Packaged model system 4 7 8 9 10 11 13 E 6 5 A B C D Figure 4 5 Figure 4 6 OC...

Page 10: ... Flow switch 12 Plate heat exchanger 13 Strainer valve 14 Drain pan A Inlet from space heating Indirect DHW tank pri mary return B Outlet to space heating Indirect DHW tank primary flow C Refrigerant Liquid D Refrigerant Gas E Discharge from pressure relief valve installer to pipe connect to suitable drain point 1 2 3 ERSC Split model system for heating and cooling 4 6 5 7 8 9 11 10 12 13 E 14 A B...

Page 11: ... run high voltage wires including power cable indoor outdoor cable and external output wires For a wireless receiver option cable use inlet F A B C D E EHPX Packaged model system Front Side Rear View from below Earth leakage circuit breaker Terminal block Main controller Pressure relief valve Earth leakage circuit breaker Terminal block Main controller Pressure relief valve Automatic air vent Auto...

Page 12: ...ires 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 G Drain socket O D ø20 A B C D E ERSC Split model system Front Right side Rear View from below Earth leakage circuit breaker Terminal block Main controller Pressure relief valve G Automatic...

Page 13: ...4 CNP1 Water circulation pump 1 output Space heating DHW OFF ON OUT2 TBO 1 5 6 Water circulation 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 2 way valve1 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 ...

Page 14: ...d supply BHCP Contactor for booster heater protection IN6 Room thermostat 2 Field supply IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication FTC4 Outdoor unit L...

Page 15: ...oor thermostat Field supply BHCP Contactor for booster heater protection IN6 Room thermostat 2 Field supply IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication ...

Page 16: ...nector Item OFF ON OUT1 TBO 1 3 4 CNP1 Water circulation pump 1 output Space heating DHW OFF ON OUT2 TBO 1 5 6 Water circulation 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 2 way valve1 output Heating DHW OUT5 TBO 1 12 13 Mixing valve output Stop Close TBO 1 13 14 Stop Open OUT6 CNBH 1 3...

Page 17: ... supply BHCP Contactor for booster heater protection IN6 Room thermostat 2 Field supply IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication FTC4 Outdoor unit LE...

Page 18: ...oor thermostat Field supply BHCP Contactor for booster heater protection IN6 Room thermostat 2 Field supply IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication ...

Page 19: ...mostat 2 Field supply IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication FTC4 Outdoor unit LED4 Reading or writing data to SD card CNPWM Pump speed control sig...

Page 20: ... 2 IN6 Room thermostat 2 Field supply BHCP Contactor for booster heater protection IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication FTC4 Outdoor unit LED4 Re...

Page 21: ... for booster heater 2 IN6 Room thermostat 2 Field supply BHCP Contactor for booster heater protection IN7 Flow switch 3 Field supply FLOW TEMP CONTROLLER FTC4 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 11 Dip switch setting X1 X12 Relay LED1 Power supply FTC4 LED2 Power supply Main controller LED3 Communication FTC4 O...

Page 22: ...er2 MXV M 1 M 1 MP2 M 1 MP3 MP1 M 1 2WV2 M 1 1 3 CNP1 WHT 1 3 1 3 Signal output Boiler 1 3 CNPWM WHT CNIH ORN 2 1 3 CNBHT BLK X5B X10 CNBC GRY CNBH WHT TBO 1 X9 X13 Open Close N 3 Signal output Immersion heater 9 10 11 3WV M 1 1 TBO 1 9 10 11 2WV1 M 1 TBO 1 3WV 2WV1 2 2 2 ECB1 L 1 N 3 BHCP BLU BLU RED WHT No 2 WHT No 1 RED VLT VLT GRY GRY BHC1 BHT 6 4 2 5 3 1 A1 A2 BH1 BHF 2 4 Power supply to Boos...

Page 23: ... 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 E VM2B ON E VM2B SW2 4 Cooling mode function Inactive Active OFF Except ERSC VM2B ON ERSC VM2B SW2 5 Automatic switch to backup heat source operation When outdoor unit stops by error Inactive Active 2 OFF SW2 ...

Page 24: ... 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 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 Desig...

Page 25: ...l 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 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 6024...

Page 26: ... Outdoor unit S1 S2 3 Hydrobox 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 Notes 1 Wiring size must comply...

Page 27: ... 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 Notes 1 Wiring size must comply with the applicable local and national codes 2 Indoor unit outdoor un...

Page 28: ... 12 13 14 18 19 25 1 17 24 26 26 24 Pa 16 B A 17 20 23 21 22 23 24 24 3 4 15 2 1 5 6 7 8 9 10 11 12 13 14 18 19 25 EHSC Split model system ERSC Split model system for heating and cooling Hydrobox Drain Local system 1 Water supply Drain Cold water DHW A Refrigerant pipe B Water pipe 1 Plate heat exchanger 2 Flexible hose 3 Booster heater 1 2 4 Drain cock booster heater 5 Pump valve 6 Water circulat...

Page 29: ...e temperature as that for Zone1 The water circuit for Zone2 can be closed during Cooling mode using dip switch 3 4 1 Zone1 heat emitters e g radiator fan coil unit field supply 2 Mixing tank field supply 3 Zone1 flow water temp thermistor THW6 4 Zone1 return water temp thermistor THW7 5 Zone1 water circulation pump field supply 6 Zone1 flow switch field supply 7 Motorized mixing valve field supply...

Page 30: ...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 31: ...tion 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 temperature 7 Dec...

Page 32: ...rameters Adjustment Zone2 Curve parameters Adjustment Schedule timer menu Heating Zone1 Schedule timer preview Day select Time select Time setting Temp setting Zone2 Schedule timer preview Day select Time select Time setting Temp setting Cooling Schedule timer preview Day select Time select Time setting DHW Schedule timer preview Day select Time setting Time setting DHW 2 1 Period Schedule timer p...

Page 33: ...emp 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 39 Target temp Start Finish Max temp Max temp period Flow temp Increase Temp increase step Increase interval Flow...

Page 34: ...hilst 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 and 3 way valve 2 way valve 1 and mixing valve can be manually overridden using manual operation mode When manual operation is selected a ...

Page 35: ...his 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 syste...

Page 36: ...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 1 The Pump speed screen is displayed Use F2 and F3 buttons to set the pump speed of the water circulation pump between 1 and 5 1 For multiple outdoor units...

Page 37: ...g 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 st...

Page 38: ...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 2 Room temp control Heating screen Menu subtit...

Page 39: ...ow 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 finish ...

Page 40: ...nation 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 Cooling flow temp Ltemp Legionella hot water temp Hroom 1 Heating target room temp Lfreq Legionella operation Frequency Hro...

Page 41: ...he 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 default s...

Page 42: ... menu to write to the main controller Press CONFIRM to start downloading Wait for a few minutes until Complete appears 1 For multiple outdoor units control system only 1 2 3 4 5 6 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 Press F3 and F4 buttons to set the Ref address 1 Use F1 F2 and F3 buttons to select a menu to...

Page 43: ... 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 temp THW8 39 88 C 514 Indoor un...

Page 44: ...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 0...

Page 45: ...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 0...

Page 46: ...x 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 47: ...x 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 48: ... 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 49: ... 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 50: ...rs 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 Main scre...

Page 51: ...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 52: ... 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 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 controlle...

Page 53: ...hosen 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 THW1 detects a temp 1ºC for 10 cons...

Page 54: ...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 leak in water...

Page 55: ...or 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 system is OFF 3 Check the status of the boiler 4 Boiler failure 4 Check the status of the boiler 5 FTC4 board failure 5 Replace board LH Boil...

Page 56: ...re main controllers have been connected to the FTC4 1 Only connect 1 main controller to 1 FTC4 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 independ ...

Page 57: ... 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 ...

Page 58: ...s 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 Figure 5 2 1 in installation manual When...

Page 59: ...4 on FTC4 is off See figure 5 2 1 in installation manual 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 6 in instal lation manual LED4 on FTC4 is blinking See Figure 5 2 1 in installation ma...

Page 60: ...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 61: ...maged 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 from...

Page 62: ...d operating range When defrosting operation is running at such a low outdoor ambient temperature after Cooling mode is switched to DHW or LP mode the water temperature in the cooling circuit drops too low which could result in L6 error to stop all the opera tions Do not run Cooling operation when the outdoor ambient temperature is lower than 10ºC To automatically stop or recover only Cooling opera...

Page 63: ...re kPa Speed 5 Default Speed 4 Speed 3 Speed 2 Speed 1 Speed 5 Default Speed 4 Speed 3 Speed 2 Speed 1 Flow rate L min Flow rate L min Flow rate L min EHPX series with PUHZ W85 EHPX series with PUHZ HW112 140 External static pressure kPa External static pressure kPa Speed 5 Default Speed 4 Speed 3 Speed 2 Speed 1 63 Outdoor heat pump unit Water flow rate range L min Packaged PUHZ W50 7 1 14 3 PUHZ...

Page 64: ... AWG18 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 heate...

Page 65: ...ame Check Points Flow switch Measure the resistance between the terminals with a tester State of moving part Normal Abnormal Paddle vertical Flow 5 5 l min Open Other than open Paddle inclined Flow 5 5 l min Short Other than short Thermistors Disconnect the connector then measure the resistance with a tester At ambient temperatures of 10 30 C OCH532A ...

Page 66: ...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 67: ... 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 thermo stat 1 input CN20 T...

Page 68: ...ling the lead wires and pipes again use new commercially available bands When removing the parts associated with water pipe work drain the hydrobox as necessary Refer to Draining the Hydrobox on page 30 When draining the hydrobox keep water from splashing on the internal parts mainly electric parts and insulations DISASSEMBLY PROCEDURE PHOTOS ILLUSTRATION Photo 1 1 Photo 1 2 Photo 2 1 Figure 2 1 1...

Page 69: ...pping of the contactors hold the contactors 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 block Note To ...

Page 70: ...ntrol box can be swung to the front without removing control box cover 3 Remove the screw from the control box bracket R and 2 screws from the control box bracket L 4 Remove the coated clamps 5 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 ...

Page 71: ...port under Photos 5 2 When either of the pump valve handles is stiff remove the handle and turn the vertical stem 90 degrees clockwise mainly by using a spanner Photo 5 4 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 Photo 5 2 When reinstalling the G1 1 2 nuts use new G1 1 2 gaskets Photo 5 3 Pump valve 8 Remove...

Page 72: ...witch lead wire from the 2 cable clamps the cable strap the 2 coated clamps and feed the lead wire out the control box without putting strain on the CN2F connector Photo 6 1 5 Swing the control box to the front Refer to Procedure 4 6 Remove the flow switch by removing the nut Photo 6 2 When reinstalling the nut use a new O ring Photo 6 3 Note To ensure the correct functioning of the flow switch ch...

Page 73: ...ater slightly and remove the booster heater with the heater stay from the back panel 9 Remove the 2 screws on the back of the heater stay and remove the heater stay from the booster heater Photo 7 3 10 Remove the drain cock primary circuit from the boost er heater Photo 7 2 Replace the removed drain cock primary circuit The drain cock can not be reused Model Lead wire No Contactor EHSC VM6B No 1 B...

Page 74: ...st screw 8 Remove the THW1 and TH2 thermistors from the thermistor holders respectively Photo 8 2 9 Close the pump valve lower and remove the G1 1 2 nut using two spanners one to hold the pump valve and the other to turn the nut When reinstalling the G1 1 2 nut use a new G1 1 2 gasket Photo 5 3 10 Remove the G1 nut upper on the booster heater and the water pump with the pump valve and the water pi...

Page 75: ...move the CN2F connector on the controller board When reinstalling the flow switch use a new O ring 16 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 17 Remove the water coil cover by removing the 2 screws Photo 8 6 18 Remove the plate heat exchanger assembly from the hydrobox Cut the band and...

Page 76: ... 2 5 Remove the manometer from the manometer cover while pressing on the claws Photo 10 3 When reinstalling the manometer assembly on the hydrobox beware not to put strain on the root 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 reinstallin...

Page 77: ... Photo 11 1 4 Remove the 2 screws on the metal support Note To avoid dropping of the expansion 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 avo...

Page 78: ...Procedure 4 3 Cut the band Photo 13 1 13 2 4 Cut the pipe cover tape about 10 cm from the top and peel off the pipe cover Photo 13 1 Reattach the pipe cover after reconnecting the flexible hose 5 Loosen the flexible hose nuts on both ends and remove the flexible hose Photos 13 1 13 2 When reinstalling the nuts use new G1 gaskets Photo 12 1 Drain cock Booster heater Photo 13 1 Nut G1 Refrigerant pi...

Page 79: ...ntrol board TH2 TH2 THW1 THW2 THW12 4 Release the THW12 and TH2 lead wires from the cable clamp the cable strap and the 2 coated clamps 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 Photo 14 2 Cable clamp Cable strap Coated clamp Earth leakage breakers...

Page 80: ...5 3 5 Remove the cover plate Photo 15 4 6 Remove 3 screws each on the side panel L R and 2 screws on the underneath surface and base assy from the hydrobox Photo 15 5 7 Remove 5 screws on the base assy Photo 15 6 8 Remove the drain pan from the base Photo 15 7 Photo 15 2 Photo 15 3 Photo 15 5 Drain pan Screws Screws Screws Photo 15 4 Base Cover plate Photo 15 6 Photo 15 7 Base assy Base Drain pan ...

Page 81: ...eads 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 included in this manual 2 Undertightening and overtighte...

Page 82: ...ircuit 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 t...

Page 83: ... Duration of maximum temp 1 120 mins 30 min Heating Cooling 2 Zone1 operation mode Heating room temp Heating flow temp Heating compensation curve Cooling flow temp Room temp Zone2 operation mode 1 Heating room temp Heating flow temp Heating compensation curve Compensation curve Compensation curve Hi set point Zone1 outdoor ambient temp 15 C 35 C 15 C Zone1 flow temp 25 C 60 C 50 C Zone2 outdoor am...

Page 84: ...45 C 30 C Max temp 35 60 C 50 C Heat pump thermo diff adjust On Off 6 On Lower limit 9 1 C 5 C Upper limit 3 5 C 5 C Boiler operation Hybrid settings Outdoor ambient temp 15 10 C 15 C Priority mode Ambient Cost CO2 Ambient Intelligent settings Energy price 7 Electricity 0 001 999 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 ...

Page 85: ...heet 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 first couple of months of insta...

Page 86: ...OKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Jan 2013 No OCH532 REVISED EDITION A Distributed in Sep 2012 No OCH532 Made in Japan New publication effective Jan 2013 Specifications are subject to change without notice ...

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Mitsubishi Electric ecodan EHSC-TM9B, Service Manual

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