Mitsubishi Electric ERSE-MEC User Manual

SERVICE MANUAL
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
Notes:
• This manual describes
service data of Hydrobox
only.
• RoHS compliant products
have <G> mark on the
spec name plate.
R410A
MAIN REMOTE
CONTROLLER
PARTS CATALOG (OCB590)
HYDROBOX
[Model Name]
EHSE-YM9EC
EHSE-MEC
ERSE-YM9EC
ERSE-MEC
[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
August 2015
HYDROBOX
No. OCH590
REVISED EDITION-B
Revision:
•Added
EHSE-YM9ECR1.UK,
EHSE-MECR1.UK,
ERSE-YM9ECR1.UK and
ERSE-MECR1.UK
in
REVISED EDITION-B.
•Somedescriptionshave
been modified.
•PleasevoidOCH590
REVISEDEDITION-A.

Mitsubishi Electric ERSE-MEC Specifications

General

Brand	Mitsubishi Electric
Model	ERSE-MEC
Category	Heat Pump
Language	English

Summary

2 SAFETY PRECAUTION

WARNING

Precautions to prevent injuries or death.

CAUTION

Precautions to prevent damage to the unit.

Mechanical

Electrical

6 WIRING DIAGRAM

6-1. EHSE-YM9EC.UK, ERSE-YM9EC.UK

Wiring diagram for specific EHSE/ERSE models.

6-2. EHSE-YM9ECR1.UK, ERSE-YM9ECR1.UK

Wiring diagram for specific EHSE/ERSE R1 models.

6-3. EHSE-MEC.UK, ERSE-MEC.UK

Wiring diagram for EHSE-MEC and ERSE-MEC models.

6-4. EHSE-MECR1.UK, ERSE-MECR1.UK

Wiring diagram for EHSE-MEC R1 and ERSE-MEC R1 models.

6-5. DIP switch setting

Explains DIP switch functions and default settings.

7 FIELD WIRING

Option 1: Hydrobox powered via outdoor unit

Wiring for single-phase and three-phase power from the outdoor unit.

Option 2: Hydrobox powered by independent source

9 CONTROLS

9-1. Main remote controller

9-2. Setting the Main remote controller

9-3. Main Settings Menu

9-4. Service Menu

Accessing and using the service menu for installers.

<Operation settings>

<Error history>

Indoor unit only operation

■ Emergency operation

<Heater>

<Boiler>

10 TROUBLESHOOTING

10-1. Troubleshooting

Overview of self-diagnosis based on error codes.

10-4. Self diagnosis and action

Detailed guide for diagnosing and resolving specific error codes.

10-5. Troubleshooting by inferior phenomena

Troubleshooting common issues not indicated by error codes.

11 DISASSEMBLY PROCEDURE

<Preparation for the repair service>

3. How to remove the electrical parts

5. How to remove water pump/pump valve

7. How to remove the booster heater

9. How to remove the plate heat exchanger

10. How to remove the manometer/pressure relief valve/air vent (automatic)

12. How to remove the thermistor <liquid refrigerant temp.> (TH2) / thermistor <flow water temp. & return water temp.> (THW1, THW2)

Notes on replacing the parts

12 SUPPLEMENTARY INFORMATION

12-2. Back-up operation of boiler

13 SERVICE AND MAINTENANCE

13-2. Annual Maintenance Log Book