Mitsubishi Electric ERSF-VM2E Service Manual
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Mitsubishi Electric ERSF-VM2E 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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Summarization of Contents

1 REFERENCE MANUAL
2 SAFETY PRECAUTION
Mechanical
Safety precautions related to the mechanical installation of the hydrobox and outdoor units.
Electrical
Safety precautions for electrical work, power supply, and wiring.
General
General safety guidelines for operation, handling, and installation.
3 SPECIFICATIONS
4 PART NAMES AND FUNCTIONS
(Packaged model system for heating and cooling)
Illustrates and names parts for the packaged ERPX model system.
(Split model system for heating and cooling)
Illustrates and names parts for the split E*S* model system.
(Split model system for heating and cooling)
Illustrates and names parts for the split ERSE model system.
5 OUTLINES AND DIMENSIONS
5-1. Technical Drawings
Provides technical drawings and dimensions for various model systems.
6 WIRING DIAGRAM
6-1. E***-M*E(E)K
Wiring diagram for E***-M*E(E)K models, detailing component connections.
6-2. E***VM2E.UK
Wiring diagram for E***VM2E.UK models, detailing component connections.
6-3. E***-VM6E.UK
Wiring diagram for E***-VM6E.UK models, detailing component connections.
6-4. E***YM9E(E).UK
Wiring diagram for E***YM9E(E).UK models, detailing component connections.
6-5. E*S*-TM9E.UK
Wiring diagram for E*S*-TM9E.UK models, detailing component connections.
6-6. DIP Switch Functions
Details DIP switch settings for various functions and model configurations.
7 FIELD WIRING
<1 phase>
Field wiring diagram for single-phase power supply to hydrobox and outdoor unit.
<3 phase>
Field wiring diagram for three-phase power supply to hydrobox and outdoor unit.
8 WATER SYSTEM DIAGRAM
(Packaged model system)
Water system diagram for the packaged E*PX model, showing component layout.
(Split model system)
Water system diagram for the split E*S* model, showing component layout.
Specific water system diagram details for ERSE models.
9 CONTROLS
9-1. Main remote controller
Overview and operation of the main remote controller, including home screen icons.
Displays current installer/user entered settings for various system parameters.
Logs and displays error codes for troubleshooting, including actions to delete history.
Procedure for setting or changing the password to access service menu functions.
Restores all functions to factory default settings, used for system reset.
Procedure for using an SD card to transfer settings between the controller and a PC.
10 TROUBLESHOOTING
10-1. Troubleshooting
Summary of self-diagnosis based on check codes and service procedures.
10-2. Test Run
Procedure and checks required before performing a test run of the system.
10-3. Malfunction diagnosis method by main remote controller
Method for diagnosing malfunctions using the main remote controller's check code screen.
10-4. Self diagnosis and action
Table and actions for diagnosing and correcting common faults identified by check codes.
10-5. Troubleshooting by inferior phenomena
Diagnosing and resolving issues based on symptoms not covered by check codes.
Annual Maintenance
Essential annual maintenance procedures and points for the hydrobox unit.
11 DISASSEMBLY PROCEDURE
1. How to remove the front panel
Step-by-step instructions for removing the front panel of the hydrobox unit.
2. How to remove the remocon assy
Instructions for removing the remote controller assembly from its holder.
3. How to remove the electrical parts
Procedure for removing electrical components like contactors and control boards.
4. How to swing the control box to the front
Instructions on how to swing the control box forward for access.
5. How to remove water pump/ pump elbow
Procedure for removing the water pump and its associated elbow component.
6. How to remove the flow sensor
Step-by-step guide to removing the flow sensor from the hydrobox.
7. How to remove the booster heater
Procedure for removing the booster heater unit from the hydrobox assembly.
8. How to remove the plate heat exchanger
Detailed steps for removing the plate heat exchanger from the hydrobox.
9. How to remove the pressure sensor
Procedure for removing the pressure sensor, specifically for E*SD/ERSF series.
10. How to remove the magnetic filter
Steps for removing the magnetic filter and its associated stay from the hydrobox.
11. How to remove the manometer/ pressure relief valve/ air vent (automatic)
Procedure for removing the manometer, pressure relief valve, and automatic air vent.
Procedure for removing the 5 bar pressure relief valve component.
Procedure for removing the automatic air vent component.
12. How to remove the expansion vessel
Steps for removing the expansion vessel from the hydrobox assembly.
15. How to remove the drain pan
Procedure for removing the drain pan from the base assembly for ER** series.
16. How to detach and attach the quick joint
Instructions for detaching and attaching quick connections, including O-ring replacement.
12 SUPPLEMENTARY INFORMATION
Refrigerant collecting (pumpdown) for split model systems only
Procedure for refrigerant collection (pumpdown) for split model systems.
Back-up operation of boiler
Details on how the boiler provides backup heating operation for the system.
Multiple outdoor units control
Information on controlling multiple outdoor units with the hydrobox.
Guidance on DIP switch settings for multiple outdoor unit control configurations.
13 SERVICE AND MAINTENANCE
13-1. Annual Maintenance
Essential annual maintenance procedures and points for the hydrobox unit.
13-2. Engineers Forms
Record sheet for commissioning and field settings of the system parameters.

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