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Mitsubishi Electric ERST30F-VM2EE User Manual

Mitsubishi Electric ERST30F-VM2EE
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 ERST30F-VM2EE Specifications

General IconGeneral
BrandMitsubishi Electric
ModelERST30F-VM2EE
CategoryAir Conditioner
LanguageEnglish

Summary

SERVICE MANUAL

2 SAFETY PRECAUTION

General Safety Guidelines

Outlines essential safety precautions for installation, operation, and maintenance of the unit.

6 WIRING DIAGRAM

E**T***-VM2(E)E Wiring Diagram

Shows the detailed electrical wiring diagram for the E**T***-VM2(E)E model, including component labels.

E**T***-VM6(E)E Wiring Diagram

Presents the electrical wiring diagram for the E**T***-VM6(E)E model, specifying connections and components.

E**T***-YM9(E)E Wiring Diagram

Illustrates the electrical wiring diagram for the E**T***-YM9(E)E model, detailing all connections.

EH*T***-TM9(E)E Wiring Diagram

Provides the electrical wiring diagram for the EH*T***-TM9(E)E model, including terminal assignments.

EHPT20X-MEHEW Wiring Diagram

Shows the electrical wiring diagram for the EHPT20X-MEHEW model, detailing component connections.

E**T***-M(E)E Wiring Diagram

Presents the electrical wiring diagram for the E**T***-M(E)E model, indicating all electrical connections.

ERST17D-VM2BE Wiring Diagram

Details the electrical wiring diagram for the ERST17D-VM2BE model, including signal and power connections.

ERST17D-VM6BE Wiring Diagram

Provides the electrical wiring diagram for the ERST17D-VM6BE model, showing all component connections.

ERST17D-YM9BE Wiring Diagram

Illustrates the electrical wiring diagram for the ERST17D-YM9BE model, detailing all wired components.

6-10. DIP Switch Functions

DIP Switch Settings for Indoor Unit Models

Explains the function of each DIP switch and lists default settings for various indoor unit models.

DIP Switch Functions (SW6, SW7)

Details functions of DIP switches SW6 and SW7, including pressure sensor and mixing valve settings.

7 FIELD WIRING

Electrical Connections (1-Phase)

Illustrates single-phase electrical connection diagrams for cylinder units and outdoor units.

Electrical Connections (3-Phase)

Provides diagrams for three-phase electrical connections between cylinder and outdoor units.

Cylinder Unit Powered by Independent Source (1-Phase)

Details electrical connections for cylinder units powered independently via a single-phase supply.

Cylinder Unit Powered by Independent Source (3-Phase)

Illustrates three-phase electrical connections for cylinder units with independent power sources.

8 WATER SYSTEM DIAGRAM

Packaged Model System Water Circuit

Shows the water system diagram for packaged model systems, illustrating pipework and components.

UK Model System Water Circuit

Provides the water system diagram for the UK model, detailing pipe connections and components.

Packaged Model System Water Circuit (E*PT20X)

Displays the water system diagram for E*PT20X packaged models, showing pipework and component layout.

Packaged Model System Water Circuit (E*PT30X)

Illustrates the water system diagram for E*PT30X packaged models, detailing pipe connections.

Split Model System Water Circuit

Shows the water system diagram for split model systems, including refrigerant and water flow.

9 CONTROLS

Main Remote Controller Overview

Describes the main remote controller interface, including home screen icons and their functions.

9-4. Service Menu

Provides access to service functions for installers and technicians, including manual operation and settings.

Error History Log

Explains how to view and diagnose past error codes and their occurrence history.

Password Protection and Reset

Covers setting up password protection and procedures for resetting the password.

Password Reset Procedure

Provides steps for resetting the service menu password if it is forgotten.

Indoor Unit Only Operation Modes

Explains how to activate/deactivate indoor unit only operation for heating with heaters or boilers.

Emergency Operation Modes

Details how to activate/deactivate emergency operation using heaters or boilers when outdoor unit is disconnected.

10 TROUBLESHOOTING

Troubleshooting Summary by Check Codes

Provides a summary of troubleshooting based on check codes and possible causes/actions.

Malfunction Diagnosis via Remote Controller

Explains how to diagnose malfunctions using check codes displayed on the main remote controller.

Self-Diagnosis and Action: Circulation Water Temperature Overheat

Details causes and actions for circulation water temperature overheat protection (Check code L3).

Self-Diagnosis and Action: Tank Water Temperature Overheat

Covers possible causes and solutions for tank water temperature overheat protection (Check code L4).

Self-Diagnosis: Thermistor Failures

Addresses thermistor failures (P1, P2, L5, LD) and their corresponding causes and diagnostic steps.

Self-Diagnosis: Circulation Water Freeze Protection

Explains causes and actions for circulation water freeze protection errors (Check code L6).

Self-Diagnosis: Low Primary Circuit Flow Rate

Details causes and actions for low flow rate detection in primary and zone circuits by flow sensors/switches.

Self-Diagnosis: Pressure Sensor and Boiler Issues

Covers pressure sensor failure, high pressure protection, boiler circulation issues, and operation errors.

Self-Diagnosis: Anti-Freeze Protection and Communication Failures

Addresses anti-freeze protection errors and various communication failure codes (E0/E4, E3/E5, E6).

Self-Diagnosis: Communication Failures (E7, E1/E2, J0, J1-J8)

Details communication failure codes between indoor/outdoor units, remote controllers, and wireless receivers.

Self-Diagnosis: Combination and Outdoor Unit Errors

Covers combination errors (EE) and outdoor unit specific errors (U*, F*, A*).

Troubleshooting: Blank Remote Controller Display

Provides steps to diagnose and resolve issues where the main remote controller display is blank.

Troubleshooting: Remote Controller 'Please Wait' and FTC Errors

Addresses issues with the 'Please Wait' message on the remote controller and FTC related errors (LEDs).

Troubleshooting: Heating Performance and Water Heating Issues

Addresses problems where the heating system doesn't reach temperature and DHW heating takes longer.

Troubleshooting: Water Discharge from Relief Valves

Explains causes and solutions for water discharge from pressure relief valves in primary and sanitary circuits.

10-6. Checking Component Parts Function

Component Resistance Checks - Pumps, Heaters, Flow Sensor

Details resistance checks for water circulation pumps, immersion heaters, flow sensors, and booster heaters.

Component Resistance Checks - Valves, Pressure Sensor, Thermistors

Outlines resistance checks for 3-way valves, pressure sensors, and various thermistors.

10-7. Test point diagram

FTC Controller Board Layout (Except E*ST***-*M*BE)

Shows a diagram of the FTC controller board, labeling connectors and test points for E*ST***-*M*BE models.

FTC Controller Board Layout (E*ST***-*M*BE)

Illustrates the FTC controller board layout, labeling connectors and test points for E*ST***-*M*BE models.

11 DISASSEMBLY PROCEDURE

13 SERVICE AND MAINTENANCE

13-2. Annual Maintenance (cylinder unit and hydrobox)

Details annual maintenance requirements, parts replacement, and inspection schedules.

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