Mitsubishi EHST20D-YM9C - User Manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL
...................................
3
2. SAFETY PRECAUTION
...................................
4
3. SPECIFICATIONS
............................................
7
4. PART NAMES AND FUNCTIONS
.................
11
5. OUTLINES AND DIMENSIONS
.....................
13
6. WIRING DIAGRAM
........................................
15
7. FIELD WIRING
...............................................
34
8. WATER SYSTEM DIAGRAM
.........................
38
9. CONTROLS
...................................................
42
10. TROUBLESHOOTING
...................................
62
11. DISASSEMBLY PROCEDURE
......................
79
12. SUPPLEMENTARY INFORMATION
...........
102
13. SERVICE AND MAINTENANCE
.................
103
Notes:
• This manual describes service
data of cylinder unit only.
•
RoHS compliant products have
<G> mark on the spec name plate.
R410A
PARTS CATALOG (OCB570)
CYLINDER UNIT
CYLINDER UNIT
MAIN REMOTE
CONTROLLER
September 2016
No. OCH570
REVISED EDITION-C
OCH570 REVISED EDITION-B
is void.
[Model Name]
EHST20C-VM2C
EHST20C-VM6C
EHST20C-YM9C
EHST20C-TM9C
EHST20C-VM2EC
EHST20C-VM6EC
EHST20C-YM9EC
EHST20C-MHCW
EHST20C-MEC
EHST20D-VM2C
EHST20D-VM2EC
EHST20D-YM9C
EHST20D-MHCW
EHST20D-MEC
EHST20D-MHC
Revision:
•
Added EHST20C-VM2CR2.UK,
EHST20C-VM6CR2.UK,
EHST20C-YM9CR2.UK,
EHST20C-TM9CR2.UK,
EHST20C-VM2ECR2.UK,
EHST20C-VM6ECR2.UK,
EHST20C-YM9ECR2.UK,
EHST20C-MHCWR2.UK,
EHST20C-MECR2.UK,
EHST20D-VM2CR2.UK,
EHST20D-VM2ECR2.UK,
EHST20D-YM9CR2.UK,
EHST20D-MHCWR2.UK,
EHST20D-MECR2.UK,
EHST20D-MHCR2.UK,
EHPT20X-VM2CR2.UK,
EHPT20X-VM6CR2.UK,
EHPT20X-YM9CR2.UK,
EHPT20X-TM9CR2.UK,
EHPT20X-MHCWR2.UK,
ERST20C-VM2CR2.UK,
ERST20C-MECR2.UK,
ERST20D-VM2CR2.UK and
ERST20D-MECR2.UK in
REVISED EDITION-C.
•Somedescriptionshavebeen
modified.
[Service Ref.]
Refer to page 2.
EHPT20X-VM2C
EHPT20X-VM6C
EHPT20X-YM9C
EHPT20X-TM9C
EHPT20X-MHCW
ERST20C-VM2C
ERST20C-MEC
ERST20D-VM2C
ERST20D-MEC

Mitsubishi EHST20D-YM9C Specifications

General

Category	Heat Pump
Model	EHST20D-YM9C
Heating Capacity	20 kW
Energy Efficiency Ratio (Heating)	4.0
Energy Efficiency Ratio (Cooling)	4.0
Refrigerant	R410A
Weight (Indoor Unit)	40 kg

Summary

Reference Manual

Safety Precautions

Specifications

Part Names and Functions

Outlines and Dimensions

Wiring Diagrams

Field Wiring

Water System Diagrams

Controls

Main Remote Controller

Details the functions, screens, icons, and operation of the main remote controller.

Troubleshooting

Disassembly Procedures

Supplementary Information

Service and Maintenance