Mitsubishi Electric EHSE-MEC Service Manual Download Page 68

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DISASSEMBLY PROCEDURE

PHOTOS

Photo 12-1

Photo 12-2

12. How to remove the thermistor <liquid refrigerant temp.>

(TH2) / thermistor <flow water temp. & return water temp.>

(THW1, THW2)

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

(2) Remove the control box cover. (Refer to Procedure 3.)

(3) Disconnect the following connectors on the control

board.

▪ TH2 (CN21)

▪ THW1, THW2 (CNW12)

(4) Release the THW1, THW2 and TH2 lead wires from the

cable clamp and the 2 cable straps. (Photo 12-1)

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 12-2)

Earth leakage

breakers (ECB1)

Connectors

(CN21)

(CNW12)

THW2 thermistor

Cable

clamp

Cable strap

THW1 thermistor

TH2 thermistor

OCH590B

Summary of Contents for EHSE-MEC

Page 1: ...escribes service data of Hydrobox only RoHS compliant products have G mark on the spec name plate R410A MAIN REMOTE CONTROLLER PARTS CATALOG OCB590 HYDROBOX Model Name EHSE YM9EC EHSE MEC ERSE YM9EC ERSE MEC Service Ref EHSE YM9EC UK EHSE YM9ECR1 UK EHSE MEC UK EHSE MECR1 UK ERSE YM9EC UK ERSE YM9ECR1 UK ERSE MEC UK ERSE MECR1 UK August 2015 HYDROBOX No OCH590 REVISED EDITION B Revision Added EHSE...

Page 2: ...A UK OCH583 OCB583 PUHZ SW160YKAR1 UK PUHZ SW200YKA PUHZ SW200YKA UK PUHZ SW200YKAR1 UK PUHZ SW160YKA BS PUHZ SW160YKA BS UK PUHZ SW160YKAR1 BS UK PUHZ SW200YKA BS PUHZ SW200YKA BS UK PUHZ SW200YKAR1 BS UK PUHZ SHW230YKA PUHZ SHW230YKA OCH534 OCB534 PUHZ SHW230YKAR1 PUHZ SHW230YKA2 PUHZ SHW230YKA2 OCH594 OCB594 OCH590B ...

Page 3: ...the refrigerant lines Do not mix it with any other re frigerant 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 explosion and other hazards The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit bre...

Page 4: ...do not contain any harmful contaminants such as sulfuric compounds oxidants debris or dust Use pipes with the specified thickness Refer to 4 4 in the instal lation manual Note the following if reusing existing pipes that carried R22 refrigerant Replace the existing flare nuts and flare the flared sections again Do not use thin pipes Refer to 4 4 in the installation manual Store the pipes to be use...

Page 5: ...ing 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 perf...

Page 6: ...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 Hz Breaker when powered from independent source 10 A Booster heater Power supply Phase voltage frequency 3 400 V 50 Hz 3 400 V 50 Hz Capacity ...

Page 7: ...able 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 Hz Breaker when powered from independent source 10 A Booster heater Power supply Phase voltage frequency 3 400 V 50 Hz 3 400 V 50 Hz Capacity 3 kW 6 kW 3 kW 6 kW Cu...

Page 8: ...C 1 Control and electrical box 2 Main remote 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 Strainer valve 13 Drain pan OCH590B ...

Page 9: ...re relief valve Back panel support Hook View from below Side Rear Manometer Left Power supply wiring Indoor unit independent power supply Right Indoor outdoor wiring Space heating flow ISO 228 1 G1 1 2 B Space heating return ISO 228 1 G1 1 2 B Refrigerant Liquid 3 8 Refrigerant Gas Refer to detail view a Add an accessory to refrigerant GAS PIPE FLARING 3 4F Refrigerant Gas con nection BRAZING I D ...

Page 10: ...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 OCH590B ...

Page 11: ... Refer to SW3 3 in 6 5 DIP switch setting IN8 TBI 3 1 2 Electric energy meter 1 Refer to installation manual IN9 TBI 3 3 4 Electric energy meter 2 IN10 TBI 3 5 6 Heat meter 1 If using outdoor thermostat for controlling operation of heaters the lifetime of the heat ers and related parts may be reduced 2 To turn on the boiler operation use the main remote controller to select Boiler in External inpu...

Page 12: ... meter 1 Refer to installation manual IN9 TBI 3 3 4 Electric energy meter 2 IN10 TBI 3 5 6 Heat meter IN1A TBI 3 12 14 CN1A Flow sensor 1 If using outdoor thermostat for controlling operation of heaters the lifetime of the heaters and related parts may be reduced 2 To turn on the boiler operation use the main remote controller to select Boiler in External input setting screen in the service menu T...

Page 13: ...ting IN8 TBI 3 1 2 Electric energy meter 1 Refer to installation manual IN9 TBI 3 3 4 Electric energy meter 2 IN10 TBI 3 5 6 Heat meter 1 If using outdoor thermostat for controlling operation of heaters the lifetime of the heaters and related parts may be reduced 2 To turn on the boiler operation use the main remote controller to select Boiler in External input setting screen in the service menu T...

Page 14: ... installation manual IN9 TBI 3 3 4 Electric energy meter 2 IN10 TBI 3 5 6 Heat meter IN1A TBI 3 12 14 CN1A Flow sensor 1 If using outdoor thermostat for controlling operation of heaters the lifetime of the heaters and related parts may be reduced 2 To turn on the boiler operation use the main remote controller to select Boiler in External input setting screen in the service menu Table 2 Outputs Na...

Page 15: ...W2 4 Cooling mode function Inactive Active OFF EHSE M EC ON ERSE M EC SW2 5 Automatic switch to backup heat source operation When outdoor unit stops by error 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 chan...

Page 16: ...ntact 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 3 Maximum 45 m If 2 5 mm is used maximum 50 m If 2 5 mm is used and S3 is separated maximum 80 m 4 The values given in the table above are not always measured against the ground value Notes 1 Wiring size must comply with the...

Page 17: ...30 V 50 Hz Hydrobox input capacity Main switch Breaker 2 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 3 2 Min 0 3 Hydrobox Outdoor unit earth Circuit rating Hydrobox L N 4 230 V AC Hydrobox Outdoor unit S1 S2 4 Hydrobox Outdoor unit S2 S3 4 24 V DC Notes 1 Wiring size must comply with the applicable local and national cod...

Page 18: ... 21 24 22 23 5 3 16 9 10 11 12 14 15 19 26 4 6 7 8 1 24 25 25 20 EHS Heating system ERS Heating and cooling system Local system Refrigerant pipe Water supply DHW Drain Drain Cold water Water pipe Hydrobox Flare connections 1 Refer to the following section Local system No Part name EHSE YM9EC EHSE MEC ERSE YM9EC ERSE MEC 1 Control and electrical box 2 Main remote controller 3 Plate heat exchanger R...

Page 19: ...y 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 local su...

Page 20: ... the joints to prevent a corrosive reaction taking 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 ...

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

Page 22: ...ighlighted 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 Remote 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 reduce the risk of untrained end users altering the setting...

Page 23: ...estriction Active Non active Heating room temp Heating compensation curve Heating room temp Heating compensation curve Compensation curve preview Compensation curve edit F1 F1 F3 F1 F2 F2 F2 F2 F4 F3 F3 F3 F4 F4 F3 F4 F2 F4 F3 F4 F2 F3 F4 DHW Date Time yyyy mm dd hh mm EN FR DE SV ES IT DA NL FI NO PT BG PL CZ RU OFF Room Tank Room Tank OFF ON hh mm hh mm AM AM hh mm C F Room RC zone select Sensor...

Page 24: ... Delay ON OFF Delay 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 in...

Page 25: ...n 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 cannot be set whilst the indoor unit is running The installer should turn off the unit before trying to set these f...

Page 26: ... 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 to wa...

Page 27: ...ed 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 s...

Page 28: ... the maximum temperature set in the Flow temp range menu Fast mode is not efficient and will increase running cost compared to normal mode Range of outdoor ambient temperature at which simultaneous operation starts is 30 to 10 C default 15 C System shall automatically return to routine operation This will happen when the outdoor ambient temperature rises above the selected temperature for this spe...

Page 29: ...ree in 9 3 Main Settings Menu 1 Default setting is used for E SC D EHPX models Please change setting according to the table above 2 Change setting to 3 kW when connecting optional immersion heater PAC IH03V2 E 3 Please change setting according to the table below When anti freeze solution propylene glycol is used for primary water circuit set the delivered energy adjustment if necessary For further...

Page 30: ... room temperature THW7 Zone1 return water temperature TH2 Refrigerant return temperature THW8 Zone2 flow water temperature THW1 Water flow temperature THW9 Zone2 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 co...

Page 31: ...on 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 Press CONFIRM...

Page 32: ...inutes until 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 e...

Page 33: ... room 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 Zone2 room temp TH1B 39 88 C 508 Indoor unit DHW tank water temp THW5 39 88 C 509 Indoor unit Zone1 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 Zone1 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: ...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 37: ...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 38: ... 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 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: ...is now deactivated Emergency operation In emergency operation an operation without connecting outdoor unit and main remote controller is possible When in Emergency operation the main control has NO control functions Space heating flow temp is restarted 40 C and DHW tank temp is restricted 50 C 1 Heater Heating for DHW and space heating is provided by the heater Activating emergency operation mode ...

Page 41: ... 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 in 10 4 Self diagnosis and action and 10 5 Troubleshooting by inferior phenomena fully before resorting to replacing parts 10 2 Test Run Before a test run After installation of outdoor unit pipework and electrical wiring recheck ...

Page 42: ...e 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 recommended range 3 Valve operation fault 3 Check valves on primary water circuit are installed level 4 2 way valve local supply actuator fault 4 Electrically test to determine fault 5 3 way valve local supply actuator fault 5 1 Electrically test to dete...

Page 43: ...the Heating operation and when Main remote controller or Room RC 1 8 is chosen for the Room Sensor setting in the Initial setting 4 Replace wireless remote controller or main remote controller 5 Incorrect setting of the DIP switch es 5 Check the DIP switch setting s L6 Circulation water freeze protection DHW Heating Cooling LP FS OS Error code displayed when THW1 detects a temp 1ºC for 10 consecut...

Page 44: ...hed on 1 Insufficient system head 1 Refer to table in 10 6 Checking Com ponent Parts Function 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 ...

Page 45: ...e 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 LF Flow sensor failure Disconnection or loose connection of flow sensor Check flow sensor cable for damage or loose connection LH Boiler circulation water freeze protection Flow rate of th...

Page 46: ...pected 30 consecutive times 1 2 or more main remote controllers have been connected to the FTC 1 Only connect 1 main remote controller to 1 FTC indoor unit board 2 Fault with main remote controller transmission receiving circuit board 2 to 4 Turn the power to the indoor unit OFF and then ON Power to both the indoor unit and outdoor units should be switched OFF then ON This may require switching 1 ...

Page 47: ...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 battery 2 The wireless remote contr...

Page 48: ...FTC and outdoor unit 3 The main screen appears with a press of the ON button but disappears in a second The main remote controller operations do not work for a while after the settings are changed in the service menu This is because the system takes time to apply the changes Normal operation The indoor unit is applying updated settings made in the service menu Normal operation will start shortly 4...

Page 49: ...on FTC is off See 6 WIRING DIAGRAM 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 5 8 in installation manual LED4 on FTC is blinking See 6 WIRING DIAGRAM 1 Full of data 1 Move or delete data or replac...

Page 50: ... valve 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...

Page 51: ... check for foreign objects inside If the problem is not still solved replace the pressure relief valve 3 If intermittent expansion vessel charge may have reduced bladder perished 3 Check gas side pressure in expansion vessel Recharge to correct precharge pressure if necessary If bladder perished replace expansion vessel with a new one with appropriate pre charge 4 DHW tank may have subjected to ba...

Page 52: ...ting 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 With 2 In the case external electric energy meter and or heat meter is not used check if the setting for electric heater and water pump s input is correct by referring to Energy monitor s...

Page 53: ...omponent Parts Function Part Name Check Points 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 breaker again Relay for heater R S T A1 A2 U V W When the applied voltage is not 230 V AC across the t...

Page 54: ... short THWB2 Black White Blue Brown Flow signal V 5 V DC CN1A 1 4 Flow signal Flow output signal V 0 0 5 1 1 5 2 2 5 0 10 20 30 40 50 70 Flow l min 61 5 2 3 54 Part Name Check Points Thermistors Disconnect the connector then measure the resistance with a tester At ambient temperatures of 10 to 30 C Flow sensor OCH590B ...

Page 55: ...or THW1 Return water temperature thermistor THW2 DHW tank temperature thermistor THW5 Zone1 flow water temperature thermistor THW6 Zone1 return water temperature thermistor THW7 Zone2 flow water temperature thermistor THW8 Zone2 return water temperature thermistor THW9 0 C 15 kΩ 10 C 9 6 kΩ 20 C 6 3 kΩ 25 C 5 2 kΩ 30 C 4 3 kΩ 40 C 3 0 kΩ Thermistor R0 15 kΩ 3 B constant 3480 2 Rt 15exp 3480 273 t ...

Page 56: ...stat input IN4 TBI 1 7 8 Demand control input IN3 TBI 1 9 0 Flow switch 2 input IN1 TBI 1 3 4 Room thermo stat input CNBC Signal output for booster heater 230 V AC OUT11 TBO 3 3 4 Signal output Error 230 V AC OUT5 TBO 2 1 3 Mixing valve Local supply 1 2 Close 230 V AC 2 3 Open 230 V AC CNP4 OUT14 Water circulation pump4 230 V AC OUT3 TBO 1 5 6 Water circulation pump3 Local supply 230 V AC OUT2 TBO...

Page 57: ...ining 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 Photo 1 1 3 Disconnect the r...

Page 58: ...ing 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 To av...

Page 59: ...R and 2 screws from the control box bracket L Photo 4 1 3 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 4 Release the coated clamp Photo 4 2 Note Remove the field wiring as necessary Earth cable Bracket R Side panel Screw Screws Control box Swin...

Page 60: ... the 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 different diam eter quick connection Photo 5 2 When reinstalling the different diameter quick connection use a new O ring When reinst...

Page 61: ...tion Photo 6 2 Refer to page 70 for how to attach and detach the different diameter quick connection 6 Remove the flow sensor by detaching the same diameter quick connection Photo 6 3 When reinstalling the same diameter quick connection use a new O ring Photo 6 4 Apply grease on the O ring using a plastic bag etc Refer to Photo 14 4 on page 70 Set the flow sensor in the orientation of the arrow pr...

Page 62: ...t diameter quick connection 7 Remove the flare nut Photo 7 2 8 Remove the 2 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 9 Remove the 2 screws on the back of the heater stay and remove the heater stay from the booster heater Photo 7 3 Reuse the removed heater stay and t...

Page 63: ...o so fully not halfway 5 Lift up the plate heat exchanger Refer to Procedure 9 1 to 14 When reinstalling the different diameter quick connections use a new O rings Refer to page 70 for how to attach and detach the different diameter quick connection Apply grease on the O ring using a plastic bag etc Refer to Photo 14 4 on page 70 Reuse the removed strainer valve stay and the strainer valve stay fi...

Page 64: ...oto 9 2 When reinstalling the different diameter quick connection use a new O ring Refer to page 70 for how to attach and detach the different diameter quick connection Photo 9 2 Water coil cover Earth cable Cable clamps Lead wire CNPWM connector Water pump connector CNP1 Pump valve Water pump Screws Booster heater Screw O ring Different diameter quick connection Plate heat exchanger inside O ring...

Page 65: ...ve the 2 screws on the strainer valve stay Photo 9 3 9 Detach the same diameter quick connection Photo 9 3 10 Lift up the plate heat exchanger and remove the strainer valve by detaching the different diameter quick connection Photo 9 4 When reinstalling the same and different diameter quick connections use a new O ring Apply grease on the O ring using a plastic bag etc Refer to Photo 14 4 on page ...

Page 66: ...he 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 2 wrenches one to hold the flare joint and the other to turn the flare nut Photo 10 2 6 Remove the pre...

Page 67: ...oint and the other to turn the flare nut 2 Remove the flare joint from the air vent Photo 10 6 Air vent Photo 10 5 Air vent Flare joint Flare joint Photo 10 6 Flare nut 11 How to remove the drain cock primary circuit 1 Remove the front panel Refer to Procedure 1 2 Swing the control box to the front Refer to Procedure 4 3 Remove the drain cock primary circuit Photo 11 1 Photo 11 1 Booster heater Dr...

Page 68: ...nnectors on the control board TH2 CN21 THW1 THW2 CNW12 4 Release the THW1 THW2 and TH2 lead wires from the cable clamp and the 2 cable straps Photo 12 1 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 12 2 Earth leakage breakers ECB1 Connectors CN2...

Page 69: ...emove 3 screws on the cover plate Photo 13 2 5 Remove the cover plate 6 Remove 3 screws each on the side panel L R and 3 screws on the underneath surface and base assy from the hydrobox Photo 13 3 7 Remove 5 screws on the base assy Photo 13 4 8 Remove the drain pan from the base Photo 13 5 Photo 13 2 Screws Photo 13 5 Base Drain pan Cover plate Claw Manometer cover Screw Saddle bands Screws Rubber...

Page 70: ...here the O ring touches 3 Apply grease on the O ring using a plastic bag etc Photo 14 4 4 Attach the O ring to the male part of quick connection Pho to 14 5 Keep the O ring free from dirt or foreign matters 5 Connect the male and female parts of the quick connection Photo 14 5 6 Attach the clip Photo 14 6 Ensure to attach the wider diameter of the clip to the fe male side Failure to do so it may c...

Page 71: ... remover over sealant 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 ov...

Page 72: ...or is an optional part 2 OUT10 has no voltage across it 3 Boiler heating is controlled ON OFF by the room temp thermostat Remote controller settings 1 Go to Service menu Heat source setting and 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 h...

Page 73: ... temp 1 25 60 C 40 C Lo flow temp set point Zone1 outdoor ambient temp 28 35 C 4 35 C Zone1 flow temp 25 60 C 25 C Zone2 outdoor ambient temp 1 28 35 C 4 35 C Zone2 flow temp 25 60 C 25 C Adjust Zone1 outdoor ambient temp 29 34 C 5 Zone1 flow temp 25 60 C Zone2 outdoor ambient temp 1 29 34 C 5 Zone2 flow temp 1 25 60 C Holiday DHW 13 Active Non active Non active Heating Cooling 12 Active Non activ...

Page 74: ... 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 30 kW 3 kW Booster heater 2 capacity 0 30 kW 6 kW Immersion heater capacity 0 30 kW 0 kW Delivered energy adjustment 50 50 0 Water pump input Pump 1 0 200 W 15 Pump 2 0 200 W 0 W P...

Page 75: ...Outdoor heat pump 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...

Page 76: ...ght 2015 MITSUBISHI ELECTRIC CORPORATION Distributed in Aug 2015 No OCH590 REVISED EDITION B Distributed in Jun 2015 No OCH590 REVISED EDITION A Distributed in May 2015 No OCH590 Made in Japan New publication effective Aug 2015 Specifications are subject to change without notice ...

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