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Mitsubishi Electric EHPT17X-VM2E User Manual

Mitsubishi Electric EHPT17X-VM2E
108 pages
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SERVICE MANUAL
Note:
This manual describes
service data of cylinder
unit only.
PARTS CATALOG (OCB814)
CYLINDER UNIT
CYLINDER UNIT
MAIN REMOTE
CONTROLLER
August 2023
No. OCH814
REVISED EDITION-A
[Service Ref.]
CONTENTS
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ··························· 3
3. SPECIFICATIONS ···································· 5
4. PART NAMES AND FUNCTIONS ·········· 10
5. OUTLINES AND DIMENSIONS ·············· 13
6. WIRING DIAGRAM ································· 15
7. FIELD WIRING ········································ 26
8. WATER SYSTEM DIAGRAM ·················· 30
9. CONTROLS ············································ 35
10. TROUBLESHOOTING ···························· 58
11. DISASSEMBLY PROCEDURE ··············· 77
12. SUPPLEMENTARY INFORMATION ····· 100
13. SERVICE AND MAINTENANCE ·········· 101
[Model Name]
Revision:
Added model names
and service ref. in
REVISED EDITION-A.
OCH814 is void.
EHPT17X-VM2E
EHPT17X-VM6E
EHPT17X-YM9E
EHPT20X-MEHEW
EHPT20X-TM9E
EHPT20X-YM9E
EHPT30X-YM9EE
EHST17D-VM2E
EHST17D-YM9E
EHST20D-VM2E
EHST20D-VM6E
EHST20D-YM9E
EHST20D-TM9E
EHST30D-MEE
EHST30D-VM6EE
EHST30D-YM9EE
EHST30D-TM9EE
ERPT17X-VM2E
ERPT20X-VM2E
ERPT20X-VM6E
ERPT20X-YM9E
ERPT30X-VM2EE
ERPT30X-VM6EE
ERPT30X-YM9EE
ERST17D-VM2E
ERST17D-VM6E
ERST17D-VM2BE
ERST17D-VM6BE
ERST17D-YM9BE
ERST20D-VM2E
ERST20D-VM6E
ERST20D-YM9E
ERST30D-VM2EE
ERST30D-VM6EE
ERST30D-YM9EE
ERST20C-VM2E
ERST30C-VM2EE
ERST20F-VM2E
ERST20F-VM6E
ERST20F-YM9E
ERST20F-TM9E
ERST30F-VM2EE
ERST30F-VM6EE
ERST30F-YM9EE
ERST30F-TM9EE
EHPT17X-VM2E.UK
EHPT17X-VM6E.UK
EHPT17X-YM9E.UK
EHPT20X-MEHEW.UK
EHPT20X-TM9E.UK
EHPT20X-YM9E.UK
EHPT30X-YM9EE.UK
EHST17D-VM2E.UK
EHST17D-YM9E.UK
EHST20D-VM2E.UK
EHST20D-VM6E.UK
EHST20D-YM9E.UK
EHST20D-TM9E.UK
EHST30D-MEE.UK
EHST30D-VM6EE.UK
EHST30D-YM9EE.UK
EHST30D-TM9EE.UK
ERPT17X-VM2E.UK
ERPT20X-VM2E.UK
ERPT20X-VM6E.UK
ERPT20X-YM9E.UK
ERPT30X-VM2EE.UK
ERPT30X-VM6EE.UK
ERPT30X-YM9EE.UK
ERST17D-VM2E.UK
ERST17D-VM6E.UK
ERST17D-VM2BE.UK
ERST17D-VM6BE.UK
ERST17D-YM9BE.UK
ERST20D-VM2E.UK
ERST20D-VM6E.UK
ERST20D-YM9E.UK
ERST30D-VM2EE.UK
ERST30D-VM6EE.UK
ERST30D-YM9EE.UK
ERST20C-VM2E.UK
ERST30C-VM2EE.UK
ERST20F-VM2E.UK
ERST20F-VM6E.UK
ERST20F-YM9E.UK
ERST20F-TM9E.UK
ERST30F-VM2EE.UK
ERST30F-VM6EE.UK
ERST30F-YM9EE.UK
ERST30F-TM9EE.UK
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Mitsubishi Electric EHPT17X-VM2E Specifications

General IconGeneral
BrandMitsubishi Electric
ModelEHPT17X-VM2E
CategoryAir Conditioner
LanguageEnglish

Summary

Reference Manual

Outdoor Unit Service Manual

Describes related service manuals for outdoor units.

Safety Precautions

Symbols, Warnings, and General Precautions

Explains unit symbols, warnings, and general safety measures for operation.

Specifications

Part Names and Functions

Component Identification Diagrams

Illustrates components for different system types (packaged, split).

Outlines and Dimensions

Technical Drawings and Dimensions

Provides detailed technical drawings and dimensions for various models.

Service Access Diagrams

Shows required clearances for unit service access.

Wiring Diagram

Wiring Diagrams by Model Series and DIP Switch Functions

Electrical wiring diagrams for models and DIP switch configurations.

Field Wiring

Electrical Connection Procedures

Details electrical connection methods for single and three-phase power.

Water System Diagram

Water System Diagrams by Model Type

Illustrates water circuits for different model configurations.

Controls

Main Remote Controller Overview and Navigation

Introduces the remote controller interface and menu structure.

DHW and Legionella Prevention Settings

Describes settings for domestic hot water and legionella prevention.

Service Menu Functions

Outlines functions available for installers/service engineers.

Operation Settings

Describes operational modes like heating, freeze protection, and floor dry-up.

Energy Monitor Settings

Explains how to monitor energy consumption and production.

External Input Settings

Details configurations for demand control, outdoor thermostat, and cooling limit.

Summary of Settings, Error History, and Password Protection

Provides an overview of settings, error logs, and security features.

Password Reset and SD Card/Manual Reset Functions

Covers password management and data transfer/reset procedures.

Indoor Unit Only Operation

Heater, Boiler, and Emergency Operation Modes

Details standalone heating, boiler, and emergency operational modes.

Troubleshooting

Troubleshooting Overview and Diagnosis Methods

Introduces troubleshooting steps and malfunction diagnosis.

Self-Diagnosis and Action - Overheat and Thermistor Issues

Addresses issues related to circulation water temperature overheat and thermistor problems.

Self-Diagnosis and Action - Freeze Protection and Flow Rate Errors

Covers freeze protection and low flow rate detection issues.

Self-Diagnosis and Action - Flow Rate and Heating Errors

Details flow rate detection errors and heating operation issues.

Self-Diagnosis and Action - Various System Errors

Addresses flow rate, pressure, boiler, and sensor errors.

Self-Diagnosis and Action - Communication and Anti-freeze Errors

Covers anti-freeze, communication failures, and noise issues.

Self-Diagnosis and Action - Communication and Board Failures

Addresses various communication and controller board faults.

Troubleshooting by Inferior Phenomena

Provides solutions for issues not covered by check codes.

Troubleshooting by Inferior Phenomena (continued)

Details errors related to cooling, electric heaters, and freeze protection.

Checking Component Parts Function

Guides on checking component functionality like water flow rates.

Component Parts Checkpoints

Provides resistance checks for various components.

Test Point Diagram

Illustrates test points on the FTC controller board.

Disassembly Procedure

Preparation and Front Panel Removal

Lists repair preparations and steps for removing the front panel.

Electrical Parts Removal

Guides on removing electrical components like breakers, contactors, and boards.

Control Box Removal

Explains how to remove the control box and its associated brackets.

Water Pump, Elbow, Filter Removal

Details the process for removing water pumps, elbows, and filters.

3-Way Valve and Motor Removal

Guides on disassembling and removing the 3-way valve and its motor.

Flow Sensor and Booster Heater Removal

Explains how to remove the flow sensor and booster heater.

Thermostat and Immersion Heater Removal

Details the removal of thermostats and immersion heaters.

Plate Heat Exchanger (Refrigerant-Water) Removal

Guides on removing the refrigerant-water plate heat exchanger.

Pressure Relief Valve, Manometer, Air Vent Removal

Explains how to remove relief valves, manometers, and air vents.

Expansion Vessel and T&P Relief Valve Removal

Details the removal of expansion vessels and temperature/pressure relief valves.

Drain Cock Removal

Guides on removing drain cocks from primary and sanitary circuits.

Plate Heat Exchanger (Water-Water) and Water Pump (Sanitary Circuit) Removal

Covers removing the water-water heat exchanger and sanitary water pump.

Scale Trap Removal

Details the procedure for removing the scale trap.

Thermistor Removal

Explains how to remove various thermistors.

Side Panels and Drain Pan Removal

Guides on removing side panels and the drain pan.

Back Panel Removal

Details the steps for removing the back panel.

Quick Connection Detach/Attach

Provides instructions for handling quick connections.

Multi-Function Group and Water Pump (Zone 1/2) Removal

Covers removing multi-function groups and zone water pumps.

Mixing Valve and Magnetic Filter Removal

Guides on removing mixing valves and magnetic filters.

Zone Thermistor Removal and Parts Replacement Notes

Covers thermistor removal and notes on replacing parts with tightening torques.

Supplementary Information

Refrigerant Pumpdown and Boiler Back-up Operation

Provides information on refrigerant handling and boiler backup.

Remote Controller Settings and Product Fiche

Details remote controller settings and product information.

Service and Maintenance

Engineers Forms and Commissioning Records

Provides forms for recording settings and maintenance details.

Annual Maintenance Log Book

Cylinder and Outdoor Unit Maintenance Checks

Outlines annual maintenance tasks for cylinder and outdoor units.

Annual Maintenance (Cylinder Unit and Hydrobox)

Parts Replacement and Inspection Schedule

Lists parts requiring regular replacement or inspection.

Draining Magnetic Filter and Mud Trap

Provides procedures for draining particles from filters and traps.

Draining Magnetic Filter and Mud Trap Procedures

Continues procedures for draining filters and traps.

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