Mitsubishi Electric ERSF-YM9E Service Manual
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Mitsubishi Electric ERSF-YM9E Service Manual

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HYDROBOX
SERVICE MANUAL
[Model Name]
EHSD-MEE
EHSD-VM2E
EHSD-VM6E
EHSD-YM9E
EHSD-TM9E
ERSD-VM2E
ERSD-VM6E
ERSD-YM9E
ERSF-MEE
ERSF-VM2E
ERSF-VM6E
ERSF-YM9E
ERSF-TM9E
ERSC-MEE
ERSC-VM2E
ERSC-VM6E
ERSC-YM9E
ERSE-MEE
ERSE-YM9EE
ERPX-ME
ERPX-VM2E
ERPX-VM6E
ERPX-YM9E
HYDROBOX
[Service Ref.]
EHSD-MEE.UK
EHSD-VM2E.UK
EHSD-VM6E.UK
EHSD-YM9E.UK
EHSD-TM9E.UK
ERSD-VM2E.UK
ERSD-VM6E.UK
ERSD-YM9E.UK
ERSF-MEE.UK
ERSF-VM2E.UK
ERSF-VM6E.UK
ERSF-YM9E.UK
ERSF-TM9E.UK
ERSC-MEE.UK
ERSC-VM2E.UK
ERSC-VM6E.UK
ERSC-YM9E.UK
ERSE-MEE.UK
ERSE-YM9EE.UK
ERPX-ME.UK
ERPX-VM2E.UK
ERPX-VM6E.UK
ERPX-YM9E.UK
Revision:
• Added model names and
OCH815 is void.
CONTENTS
1. REFERENCE MANUAL ······················· 2
2. SAFETY PRECAUTION ······················· 3
3. SPECIFICATIONS ······························ 5
4. PART NAMES AND FUNCTIONS ·········· 8
5. OUTLINES AND DIMENSIONS ············· 9
6. WIRING DIAGRAM ··························· 11
7. FIELD WIRING ································· 18
8. WATER SYSTEM DIAGRAM ·············· 20
9. CONTROLS ····································· 23
10. TROUBLESHOOTING ······················· 46
11. DISASSEMBLY PROCEDURE ············ 63
13. SERVICE AND MAINTENANCE ·········· 82
PARTS CATALOG (OCB815)
August 2023
No. OCH815
REVISED EDITION-A
Note:
• This manual describes
service data of
Hydrobox only.
service ref. in REVISED
EDITION-A.

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  • Page 1: Table Of Contents

    August 2023 HYDROBOX No. OCH815 REVISED EDITION-A SERVICE MANUAL [Model Name] [Service Ref.] EHSD-MEE EHSD-MEE.UK Note: EHSD-VM2E EHSD-VM2E.UK • This manual describes service data of EHSD-VM6E EHSD-VM6E.UK Hydrobox only. EHSD-YM9E EHSD-YM9E.UK EHSD-TM9E EHSD-TM9E.UK Revision: ERSD-VM2E ERSD-VM2E.UK • Added model names and ERSD-VM6E ERSD-VM6E.UK...

  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT'S SERVICE MANUAL Service Ref. Service Manual No. PUZ-WZ50VAA(-BS).UK OCH816 PUZ-WZ60VAA(-BS).UK OCB816 PUZ-WZ80VAA(-BS).UK PUZ-WM50VHA(-BS).UK PUZ-WM60VAA(-BS).UK PUZ-WM85VAA(-BS).UK OCH727 Packaged model PUZ-WM85YAA(-BS).UK OCB727 PUZ-WM112VAA(-BS).UK PUZ-WM112YAA(-BS).UK PUZ-HWM140VHA(-BS) OCH748 PUZ-HWM140YHA(-BS) OCB748 PUMY-P112VKM6 PUMY-P125VKM6 PUMY-P140VKM6 OCH790 PUMY-P112YKM5 OCB790 PUMY-P125YKM5 PUMY-P140YKM5 SUZ-SWM30VA.TH SUZ-SHWM30VAH.TH SUZ-SWM40VA2.TH SUZ-SWM40VA2-SC.TH SUZ-SHWM40VAH.TH...

  • Page 3: Safety Precaution

    Do not position furniture or electrical appliances below the outdoor unit or hydrobox. The discharge pipework from the emergency/safety devices of the hydrobox should be installed according to local law. Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualified technician to fit the parts. Electrical All electrical work should be performed by a qualified technician according to local regulations and the instructions given in this manual.

  • Page 4: Cautions For Service

    CAUTION Use clean water that meets local quality standards on the primary circuit. The outdoor unit should be installed in an area with sufficient airflow according to the diagrams in the outdoor unit installation manual. The hydrobox should be located inside to minimise heat loss. Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss.

  • Page 5: Specifications

    SPECIFICATIONS OCH815A...
  • Page 6 OCH815A...
  • Page 7 OCH815A...

  • Page 8: Part Names And Functions

    <Figure 4.1> <Figure 4.2> <E*S*-*M*E> (Split model system) <ERSE-*M*EE> (Split model system) <Figure 4.3> <Figure 4.4> Part name ERPX-ME ERPX-*M*E EHSD-MEE EHSD-*M*E ERS*-MEE ERS*-*M*(E)E Note: Control and electrical box For installation of all Main remote controller E***-*M*EE models, make Plate heat exchanger (Refrigerant - Water)

  • Page 9: Outlines And Dimensions

    OUTLINES AND DIMENSIONS 5-1. Technical Drawings <Unit: mm> HOOK AUTOMATIC AIR VENT FRONT PANEL EARTH LEAKAGE CIRCUIT BREAKER BACK PANEL SUPPORT TERMINAL BLOCK MAIN CONTROLLER MANOMETER PRESSURE RELIEF VALVE G1/2 (242) <Front> <Side> <Rear> <ERPX> (Packaged model system for heating and cooling) <ERS*>...
  • Page 10 <Unit: mm> <ERSE> (Split model system for heating and cooling) HOOK AUTOMATIC AIR VENT FRONT PANEL EARTH LEAKAGE CIRCUIT BREAKER TERMINAL BLOCK BACK PANEL SUPPORT MAIN CONTROLLER MANOMETER PRESSURE RELIEF VALVE SPACE HEATING FLOW G1/2 (ISO 228-1 G1-1/2B) REFRIGERANT (242) (LIQUID 3/8) SPACE HEATING RETURN REFRIGERANT(GAS)

  • Page 11: Wiring Diagram

    WIRING DIAGRAM 6-1. E***-M(E)E.UK OCH815A...
  • Page 12 6-2. E***-VM2E.UK OCH815A...
  • Page 13 6-3. E***-VM6E.UK OCH815A...
  • Page 14 6-4. E***-YM9(E)E.UK OCH815A...
  • Page 15 6-5. E*S*-TM9E.UK OCH815A...

  • Page 16: Dip Switch Functions

    6-6. DIP Switch Functions The DIP switch number is printed on the circuit board next to the relevant switches. The word ON is printed on the circuit board and on the DIP switch block itself. To move the switch you need to use a pin or the corner of a thin metal ruler or similar. DIP switch settings are listed below in Table 6.6.1.
  • Page 17 Default settings: DIP switch Function Indoor unit model SW6 SW6-1 — — — SW6-2 — — — OFF: Except E*SD-*M*E SW6-3 Pressure sensor Inactive Active ON : E*SD-*M*E SW6-4 Analog output Inactive Active SW6-5 — — — SW6-6 — — —...

  • Page 18: Field Wiring

    FIELD WIRING Hydrobox powered via outdoor unit (If you want to use independent source, go to the Mitsubishi website.) PXZ model is not available. The model is Hydrobox powered by independent source ONLY. <1 phase> Affix label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units. Hydrobox Outdoor unit To control...
  • Page 19 Option2: Hydrobox powered by independent source <1 phase> Affix label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units. Hydrobox Earth Wiring leakage circuit Power supply circuit breaker or ~/N 230 V 50 Hz breaker Isolating *1, *2...

  • Page 20: Water System Diagram

    WATER SYSTEM DIAGRAM Water flow <E*PX> (Packaged model system) Part name Cold Hydrobox water Note: 1 Control and electrical Do not attach an additional pressure 2 Main remote controller relief valve to the 3 Plate heat exchanger heating (cooling) (Refrigerant - Water) circuit on E*PX 4 Water circulation pump 1 model to keep fire...
  • Page 21 Local system 1-zone temperature control Zone1 Zone1 2-zone temperature control 1-zone temperature control with boiler Zone1 Zone1 Zone2 2-zone temperature control & Buffer tank control 1-zone temperature control (2-zone valve ON/OFF control) Zone1 Zone1 Zone2 Zone2 1. Zone 1 heat emitters (e.g. radiator, fan coil unit) (local supply) 10.

  • Page 22: Filling The System (Primary Circuit)

    Filling the System (Primary Circuit) 1. Check and charge expansion vessel. 2. Check all connections including factory fitted ones are tight. 3. Insulate pipework between hydrobox and outdoor unit. 4. Thoroughly clean and flush all debris from the system. (Refer to 4.2 in the installation manual.) 5.

  • Page 23: Controls

    To change the settings of your heating/cooling system, please use the main remote controller located on the wall or the front panel of the cylinder unit or hydrobox. The following is a guide to viewing the main settings. Should you require more information, please contact your installer or local Mitsubishi Electric dealer. Some functions are not available depending on the system configuration.

  • Page 24: Quick Start

    Quick start When the main remote controller is switched on for the first time, the screen automatically goes to the [Language], [Date/Time], [System configuration], and quick start setting screen in order. On the quick start setting screen, the following items can be set. Note: [Electric booster heater use] This setting restricts the booster heater capacity.
  • Page 25 <Main Controller Menu Tree> When the system is started up for the first time, the quick start setting screen appears. [Home screen] The items with an asterisk (*) cannot be edited when the lock menu is on. (The icon changes to when the lock menu is on.) [Heating /Cooling]...
  • Page 26 Continued from the previous page. When the system is started up for the first time, the quick start <Main Controller Menu Tree> setting screen appears. The items with an asterisk (*) cannot be edited when the lock [Home screen] menu is on. (The icon changes to when the lock menu is on.) [Menu] [Service]*...
  • Page 27 When the system is started up for the first time, the quick start setting screen appears. The items with an asterisk (*) cannot be edited when the lock menu is on. (The icon Continued from the previous page. changes to when the lock menu is on.) <Main Controller Menu Tree>...
  • Page 28 Menu subtitle Function Range Unit Default value DHW target temp. Desired temperature of stored hot water 40 - 70*1 °C [Max. temp. drop] Difference in temperature between the DHW maximum temperature and the temperature at which DHW 5 - 40*2 °C mode restarts [Max.
  • Page 29 Menu subtitle Description [Zone sensor selection] When 2-zone temperature control is active and wireless remote controllers are available, select [Zone sensor selection] in [Room sen- sors] from [Setting], and then select zone No. (Zone 1/Zone 2) to assign each remote controller. [Zone 1 programme] From [Zone 1 programme] or [Zone 2 programme], select a wireless remote controller to be used for monitoring the room temperature [Zone 2 programme]...

  • Page 30: Service Menu

    9-4. Service Menu The service menu provides functions to be used by installer or service engineer. It is NOT intended for the home owner to alter settings within this menu. It is for this reason password protection is required to prevent unauthorised access to the service settings. The factory default password is "0000".
  • Page 31 <Thermistor adjustment> This function allows adjustments to be made to the thermistor readings from −10 to 10°C in 0.5°C intervals. Back THW1: Thermistor (Flow water temp.) Thermistor adjustment THW2: Thermistor (Return water temp.) THW5B: Thermistor (DHW tank water temp.)(Option) THW6: Thermistor (Zone1 flow temp.)(Option) THW7: Thermistor (Zone1 return temp.)(Option) THW8: Thermistor (Zone2 flow temp.)(Option) THW9: Thermistor (Zone2 return temp.)(Option)
  • Page 32 Mixing valve control 1/2 1. From the Auxiliary settings menu, select Mixing valve control 1/2. 2. Touch the confirm icon Back 3. The Mixing valve control screen is displayed. Mixing valve control 4. Use the +/- icon to set Running time between 10 to 240 seconds. The Running time equals to a period from full open of the valve (at a hot water mixing ratio of 100%) to full close (at a cold water mixing ratio of 100%).
  • Page 33 <Operation settings> Heating operation This function allows operational setting of flow temperature range from the Ecodan and also the time interval at which the FTC collects and processes data for the auto adaptation mode. Menu subtitle Function Range Unit Default Flow temp.

  • Page 34: General Description

    Booster heater1 Booster heater2 Pump1 * 4 Pump2 Pump3 Default 2 kW 4 kW ***(factory fitted pump) 0 kW 0 kW EHSD-MEE 0 kW 0 kW EHSD-VM2E 2 kW 0 kW EHSD-VM6E 2 kW 4 kW EHSD-YM9E 3 kW 6 kW...
  • Page 35 Back 2. Settings using the main remote controller In this menu, all parameters required to record the consumed electrical energy and the Energy monitor settings delivered heat energy which is displayed on the main remote controller can be set. The Electric heater capacity parameters are an electric heater capacity, supply power of water pump and heat Water pump input...

  • Page 36: Password Input Screen

    <Summary of settings> This function shows the current installer/user entered settings. Abbreviation Explanation Abbreviation Explanation Back HWtemp Z2 mode DHW max temperature Operation mode Summary of settings HWdrop DHW temperature drop - HER (Heating room temperature) HWmax °C °C Ltemp HWtime DHW max operation time - HE (Heating flow temperature)
  • Page 37 Password protection Back Next Password reset If you forget the password you entered, or have to service a unit somebody else installed, you can reset and change the password. 1. From [Service] in [Menu], access the [Password protection] screen. 2. Press and hold the title section for 3 seconds to access the [Password reset] screen.
  • Page 38 <Table 9-4-1> Request code in running information Request Request content Range Unit code Error history 1 (latest) Displays error history. ("– –" is displays if no history is present.) Code Error history 2 (second to last) Displays error history. ("– –" is displays if no history is present.) —...
  • Page 39 Indoor unit switch setting display (Request code: 162 to 166) 0: OFF 1: ON 0: OFF 1: ON SW1, SW2, SW3, SW4, SW5 SW1, SW2, SW3, SW4, SW5 Display Display 00 00 00 40 00 01 00 41 00 02 00 42 00 03 00 43...
  • Page 40 Indoor unit switch setting display (Request code: 162 to 166) 0: OFF 1: ON 0: OFF 1: ON SW1, SW2, SW3, SW4, SW5 SW1, SW2, SW3, SW4, SW5 Display Display 00 80 00 C0 00 81 00 C1 00 82 00 C2 00 83 00 C3...
  • Page 41 Output signal display (Request code: 175/553) Please refer to Table 2 on relevant wiring diagram whilst using the following. 0: OFF 1: ON 0: OFF 1: ON Display Display xx 00 xx 40 xx 41 xx 01 xx 02 xx 42 xx 03 xx 43 xx 44...
  • Page 42 Output signal display (Request code: 175/553) Please refer to Table 2 on relevant wiring diagram whilst using the following. 0: OFF 1: ON 0: OFF 1: ON Display Display xx C0 xx 80 xx C1 xx 81 xx C2 xx 82 xx C3 xx 83 xx C4...
  • Page 43 Display Output signal display (Request code: 175/553) 40 xx Please refer to Table 2 on relevant wiring diagram whilst using the following. 41 xx 42 xx 0: OFF 1: ON 43 xx Display 44 xx 45 xx 00 xx 46 xx 01 xx 47 xx 02 xx...
  • Page 44 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) 0: OFF (open) 1: ON (short) Display Display 00 00 00 40 00 01 00 41 00 02 00 42 00 03...

  • Page 45: Indoor Unit Only Operation

    Indoor unit only operation Indoor unit only operation In indoor unit only operation, operation without connecting outdoor unit is possible. Indoor unit During Indoor unit only operation, the main control has control functions. Necessary Heat pump Not necessary <Heater> Main remote controller Necessary Heating for DHW and space heating is provided by the heater.

  • Page 46: Troubleshooting

    TROUBLESHOOTING 10-1. Troubleshooting <Summary of self diagnosis based on check codes and Service Procedures> Present and past check codes are logged, and they can be displayed on the main remote controller or control board of the outdoor unit. Please refer to the table below and subsequent explanations to diagnose and remedy typical problems that may occur in the field. Unit Condition Check code Action...
  • Page 47 10-4. Self diagnosis and action Check if DIP SW is set correctly. (Refer to "6-5. DIP switch functions".) Check code Title and display conditions Possible Cause Diagnosis and action Circulation water temperature overheat Insufficient system head Refer to table in "10-6. Checking Compo- protection nent Parts' Function"...
  • Page 48 Check code Title and display conditions Possible Cause Diagnosis and action Indoor unit temperature thermistor failure P1/P2/L5/LD Connector/terminal wire has become Visually check the terminals and connec- Note: The thermistors subject to failure can be detached or loose wiring. tions and reattaches appropriate. checked in “Request code: 567”...
  • Page 49 Check code Title and display conditions Possible Cause Diagnosis and action Heating operation error THW1 has become detached from its Visually inspect location and reattach as Note: “3” is displayed in “Request code: 567” in holder. necessary. “Running information”. Booster heater fault Electrically test to determine fault.
  • Page 50 Check code Title and display conditions Possible Cause Diagnosis and action Low primary circuit (Zone2 side) flow rate Insufficient system head If more head required either add a pump of detected by flow switch the same size or replace existing pump. Note: “3”...
  • Page 51 Check code Title and display conditions Possible Cause Diagnosis and action Anti-freeze protection of plate heat exchanger Reduced water flow 1., 2. Check water piping. • Clogged filter The error of P6 is detected when refrigerant • Leakage of water temperature drops rapidly during cooling or Low temperature defrosting operation.
  • Page 52 Check code Title and display conditions Possible Cause Diagnosis and action Indoor/outdoor communication failure Fault with FTC transmission/receiving 1. to 3. (Transmission error) circuit board Turn the power to the indoor unit OFF and Check code E7 is displayed if signal "1" is then ON.
  • Page 53 10-5. Troubleshooting by inferior phenomena Fault symptom Possible cause Explanation - Solution Main remote controller There is no power supply to main remote Check LED2 on FTC. (See "6. WIRING DIAGRAM".) display is blank. controller. (i) When LED2 is lit. Check for damage or contact failure of the main remote controller wiring.
  • Page 54 Contact your Mitsubishi Electric dealer. Immersion heater cut-out tripped. Check immersion heater thermostat and press reset button, located on im- mersion heater boss, if safe. If the heater has been operated with no water inside it may have failed, so please replace it with a new one.
  • Page 55 Contact your Mitsubishi Electric dealer. Immersion heater cut-out has been triggered. Check immersion heater thermostat and press reset button if safe. If the heater kept running with no water inside, this may have resulted in failure, so replace it with a new one.
  • Page 56 Fault symptom Possible cause Explanation - Solution In 2-zone tempera- When Zone1 and Zone2 are both in heating Normal operation, no action necessary. ture control, only mode, the hot water temperature in Zone2 Zone2 does not does not exceed that in Zone1. reach the set tem- Faulty wiring of motorized mixing valve Refer to "5.3 Wiring for 2-zone temperature control"...

  • Page 57: Cooling Operation

    ON and OFF. Annual Maintenance It is essential that the hydrobox is serviced at least once a year by a qualified individual any spare parts required MUST be purchased from Mitsubishi Electric (safety matter). NEVER bypass safety devices or operate the unit without them being fully operational.
  • Page 58 10-6. Checking Component Parts' Function Part Name Checkpoints <Recommended water flow rate range> <Water Circulation Pump Characteristics> Outdoor heat pump unit Water flow rate Recommended ERSC series range [L/min] flow [L/min] *1 80.0 Packaged PUZ-WM50 6.5 - 14.3 Speed 5 (Default setting) 70.0 model PUZ-WM60...
  • Page 59 Part Name Checkpoints 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 When the applied voltage is not 230 VAC across the terminals A1-A2, check the terminals A1 A2...
  • Page 60 Part Name Checkpoints Thermistors Disconnect the connector then measure the resistance with a multimeter. (At ambient temperatures of 10 to 30°C.) Thermistor Normal Abnormal THW1 THW2 THW5A 4.3 to 9.5 kΩ Open or short THW5B THW6 THW7 THW8 THW9 THW10 40 to 100 kΩ...
  • Page 61 <Thermistors Characteristics Charts> • Room temperature thermistor (TH1) • Refrigerant liquid temperature thermistor (TH2) • Flow water temperature thermistor (THW1) • Return water temperature thermistor (THW2) • DHW tank water temperature thermistor (THW5A/5B) • Zone1 flow temperature thermistor (THW6) • Zone1 return temperature thermistor (THW7) •...

  • Page 62: Test Point Diagram

    10-7. Test point diagram FTC (Controller board) CNP1/OUT1 (TBO.1 1-2) Water circulation pump1 (230 VAC) OUT2 (TBO.1 3-4) Water circulation pump2 (Local supply) (230 VAC) CN01 OUT3 (TBO.1 5-6) Power supply Water circulation pump3 (230 VAC) (Local supply) (230 VAC) CNP4/OUT14 Water circulation pump4 (230 VAC)

  • Page 63: Disassembly Procedure

    DISASSEMBLY PROCEDURE <Preparation for the repair service> ● Prepare the proper tools. ● Prepare the proper protectors. ● Provide adequate ventilation. ● After stopping the operation of the hydrobox and outdoor unit, turn off all the power-supply breaker. ● Discharge the condenser before the work involving the electric parts. ●...
  • Page 64 PHOTOS/ FIGURES DISASSEMBLY PROCEDURE Photo 3-1 3. How to remove the electrical parts (Steps (1) through (3) are applied to all the following parts.) Control box (1) Remove the front panel. (Refer to Procedure 1.) (2) Loosen the clamp attached to the bottom of the control box and remove the wiring from clamp.
  • Page 65 PHOTOS/ FIGURES DISASSEMBLY PROCEDURE Photo 4-1 4. How to swing the control box to the front Side panel (1) Remove the front panel. (Refer to Procedure 1.) Earth cable (2) Remove the 2 screws from the control box bracket (R) and the 2 screws from the control box bracket (L).
  • Page 66 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 5. How to remove water pump/ pump elbow Photo 5-1 <Water pump> Water pump CNPWM (1) Remove the front panel. (Refer to Procedure 1.) connector (CNP1) Earth cable connector (2) Disconnect the CNP1 connector, the earth cable, and the CNPWM connector on the controller board.
  • Page 67 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 5. How to remove water pump/ pump elbow Photo 5-5 (ERSE series) (5) <ERSE series> Gasket (G1-1/2") Remove the G1-1/2" nuts using 2 spanners: one to hold the G1-1/2" nut and the other to turn the other side of Nut (G1-1/2") G1-1/2"...
  • Page 68 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 6. How to remove the flow sensor CN1A Photo 6-1 connector (1) Remove the front panel. (Refer to Procedure 1.) (2) Disconnect the CN1A connector on the controller board. (Photo 6-1) (3) Release the flow sensor lead wire from the fastener and the 2 cable straps.
  • Page 69 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 7. How to remove the booster heater Photo 7-2 E*S* series) Different diameter Back panel Flare nut quick connection Model Lead wire No. Contactor O-ring EHSD-VM2E ERSD-VM2E No.1 BHC1-U ERSF-VM2E ERSC-VM2E No.2 BHC1-V Booster ERPX-VM2E heater EHSD-VM6E ERSD-VM6E No.1...
  • Page 70 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 8. How to remove the plate heat exchanger (Steps (1) through (8) are applied to the following E*SC/D/F/C series.) (1) Pump down the refrigerant circuit and close the stop valve on the outdoor unit. (Refer to "12. Supplementary information".) (2) Remove the front panel.
  • Page 71 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 8. How to remove the plate heat exchanger (continued) Photo 8-2 (E*S* series) <E*S* series> (9) Remove the magnetic filter by removing the 2 quick connections. • When reinstalling the quick connections, use a new O-ring. •...
  • Page 72 PHOTOS/ FIGURES DISASSEMBLY PROCEDURE 8. How to remove the plate heat exchanger (continued) <ERSE series> (1) Pump down the refrigerant circuit and close the stop valve on the outdoor unit. (Refer to "12. Supplementary information".) (2) Remove the front panel. (Refer to Procedure 1.) (3) Swing the control box to the front.
  • Page 73 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 8. How to remove the plate heat exchanger (continued) Photo 8-5 Different diameter (7) Remove the magnetic filter by removing the 2 screws, and quick connection detaching the same diameter quick connection. (Photo 8-5) • When reinstalling the same diameter quick connection, use a new O-ring.
  • Page 74 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES Photo 10-1 (E*S* series) 10. How to remove the magnetic filter (1) Remove the front panel. (Refer to Procedure 1.) Magnetic Different diameter Rubber (2) Loosen the clamp attached to the bottom of the control O-ring filter tube quick connection...
  • Page 75 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 11. How to remove the manometer/ pressure relief valve/ air Photo 11-1 vent (automatic) Claw Screw (1) Remove the front panel. (Refer to Procedure 1.) (2) Swing the control box to the front. (Refer to Procedure 4.) <Manometer>...
  • Page 76 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 11. How to remove the manometer/ pressure relief valve/ air vent (automatic) (Continued) Photo 11-6 Expansion vessel Pressure relief valve (5 bar) <Pressure relief valve (5 bar)> (3) Remove the right side panel. (4) Remove the band at the base of the pressure relief valve (5 bar).
  • Page 77 DISASSEMBLY PROCEDURE PHOTOS/ FIGURES 13. How to remove the drain cock/ the air vent (manual) (pri- Photo 13 (E*** series) mary 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.
  • Page 78 PHOTOS/ FIGURES DISASSEMBLY PROCEDURE 15. How to remove the drain pan <ER** series> Photo 15-1 Claw Screw (1) Remove the front panel. (Refer to Procedure 1.) (2) Disconnect all the field piping. (3) Remove the screw on the manometer cover, then hold the sides of the manometer cover, disengage the 2 claws, Manometer and remove the manometer with cover.
  • Page 79 PHOTOS/ FIGURES DISASSEMBLY PROCEDURE Photo 16-1 16. How to detach and attach the quick joint Refer to the following steps when detaching and attaching the quick connection. (1) Remove the clip. (Photos 16-1 and 16-2) (2) Separate the connected parts to remove the O-ring. (Photo 16-3) •...
  • Page 80 Notes on replacing the parts Replacement of the parts listed below requires the following procedure. After the parts are removed, eliminate loctite on threads by applying loctite remover, apply new loctite, and then install and tighten the parts to the specified tightening torques below. For details about recommended loctite and loctite remover, refer to Table 11-1, and for details about the replacement parts and their tightening torques, refer to Table 11-2.

  • Page 81: Refrigerant Collecting (Pumpdown) For Split Model Systems Only

    • Set DIP SW1-3 to ON when the hydrobox is connected to a DHW tank. Note : SUZ-SWM/PXZ/PUMY-P outdoor unit is not available for multiple outdoor units control. Mitsubishi Electric Erp Directive Related Product Information: erp.mitsubishielectric.eu/erp Details and precautions on installation, maintenance and assembly can be found in the installation and or operation manuals.

  • Page 82: Controller 13. Service And Maintenance

    13-1. Annual Maintenance It is essential that the indoor unit is serviced at least once a year by a qualified individual. Any required parts should be purchased from Mitsubishi Electric. NEVER bypass safety devices or operate the unit without them being fully operational.

  • Page 83: Engineers Forms

    13-2. Engineers Forms Should settings be changed from default, please enter and record new setting in ‘Commissioning/Field settings record sheet’ below. This will ease resetting in the future should the system use change or the circuit board need to be replaced. Commissioning/Field settings record sheet Field Main remote controller screen...
  • Page 84 13-2. Engineers Forms Commissioning/Field settings record sheet Default Field Main remote controller screen Parameters Notes setting setting Menu Service Thermistor adjustment THW1 −10°C to +10°C 0°C THW2 −10°C to +10°C 0°C THW5B −10°C to +10°C 0°C THW6 −10°C to +10°C 0°C THW7 −10°C to +10°C...
  • Page 85 13-2. Engineers Forms Commissioning/Field settings record sheet (continued from the previous page) Default Field Main remote controller screen Parameters Notes setting setting Menu Service Operation Smart grid ready On/Off settings Target temp. (+1 to +30°C) / -- (Non active) Heating On/Off Target temp.
  • Page 86 13-2. Engineers Forms Commissioning/Field settings record sheet (continued from the previous page) Default Field Main remote controller screen Parameters setting Notes setting Menu Service Energy Electric heater Booster heater 1 0 to 30 kW 2 kW monitor capacity Booster heater 2 0 to 30 kW 4 kW settings...

  • Page 87: Annual Maintenance Log Book

    13-3. Annual Maintenance Log Book Contractor name Engineer name Site name Site number Hydrobox maintenance record sheet Warranty number Model number Serial number Mechanical Frequency Notes Isolate and drain hydrobox, remove mesh from internal strainer clean and replace. Open the pressure relief valve, check for unrestricted discharge to the tundish and that the valve reseats correctly.
  • Page 88 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN ©Copyright 2023 MITSUBISHI ELECTRIC CORPORATION Issued: Aug. 2023 No. OCH815A Published: Jun. 2023 No. OCH815 Specifications are subject to change without notice. Made in Japan...

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