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HYDROBOX
SERVICE MANUAL
[Model Name]
EHSE-YM9EC
EHSE-MEC
ERSE-YM9EC
ERSE-MEC
HYDROBOX
[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
MAIN REMOTE
CONTROLLER
R410A
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. SPECIFICATIONS ............................................ 6
4. PARTS NAMES AND FUNCTIONS ................ 8
5. OUTLINES AND DIMENSIONS ....................... 9
6. WIRING DIAGRAM ......................................... 11
7. FIELD WIRING ............................................... 16
8. WATER SYSTEM DIAGRAM ......................... 18
9. CONTROLS ................................................... 21
10. TROUBLESHOOTING ................................... 41
11. DISASSEMBLY PROCEDURE ...................... 57
12. SUPPLEMENTARY INFORMATION ............. 72
13. SERVICE AND MAINTENANCE ................... 73
PARTS CATALOG (OCB590)
August 2015
No. OCH590
REVISED EDITION-B
Revision:
• Added
EHSE-YM9ECR1.UK,
EHSE-MECR1.UK,
ERSE-YM9ECR1.UK and
in
ERSE-MECR1.UK
REVISED EDITION-B.
• Some descriptions have
been modified.
• Please void OCH590
REVISED EDITION-A.
Notes:
• This manual describes
service data of Hydrobox
only.
• RoHS compliant products
have <G> mark on the
spec name plate.
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi Electric ERSE-YM9EC
Summarization of Contents
REFERENCE MANUAL
Outdoor Unit Service Manuals
Lists service manuals for various outdoor unit models.
SAFETY PRECAUTION
General Safety Guidelines
Essential precautions for safe installation, operation, and maintenance.
SPECIFICATIONS
Optional Extras
Lists optional accessories available for the system.
PARTS NAMES AND FUNCTIONS
Model-Specific Component Identification
Identifies and illustrates the function of various parts for different models.
OUTLINES AND DIMENSIONS
Technical Drawings and Layouts
Provides detailed technical drawings and physical dimensions of the unit.
Service Access Requirements
Specifies necessary clearances for maintenance and servicing the unit.
WIRING DIAGRAMS
Model Wiring Diagrams
Wiring diagrams for EHSE/ERSE YM9EC and MEC series models.
DIP Switch Settings
Explains the function and configuration of DIP switches.
FIELD WIRING
Hydrobox Powered via Outdoor Unit Wiring
Wiring diagrams for systems where the hydrobox is powered by the outdoor unit.
Independent Hydrobox Power Supply Wiring
Wiring diagrams for systems with a separate power supply for the hydrobox.
WATER SYSTEM DIAGRAMS
Primary Water Circuit Diagram
Illustrates the primary water circuit connections and components.
Local System Water Configurations
Shows various local system setups for temperature control.
CONTROLS
Main Remote Controller Interface
Operation, settings, and menus of the main remote controller.
Service Menu and System Settings
Service menu, settings adjustment, and configuration options.
Operation Modes and Monitoring
Configuration of operation modes, energy monitoring, and system parameters.
Troubleshooting and Diagnostics
Error history, password protection, and summary of settings for diagnostics.
TROUBLESHOOTING
Troubleshooting Overview and Test Run
General troubleshooting, error codes, and test run procedures.
Self-Diagnosis and Error Code Actions
Detailed guide on self-diagnosis, error codes, and corrective actions.
Component Function Checks
Procedures for checking the functionality of key system components.
DISASSEMBLY PROCEDURE
Preparation and Safety for Repair
Guidelines and safety measures before performing disassembly.
Component Disassembly Steps
Step-by-step instructions for disassembling various parts of the unit.
SUPPLEMENTARY INFORMATION
Refrigerant Collection and Boiler Operation
Information on refrigerant handling and boiler backup operation.
Multiple Outdoor Unit Control
Guidance on configuring the hydrobox with multiple outdoor units.
SERVICE AND MAINTENANCE
Engineers Forms and Settings Records
Forms for recording system settings during commissioning and maintenance.
Annual Maintenance Logbook
A logbook for recording annual maintenance tasks and checks.
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