Mitsubishi EHST20D-VM2C Service Manual

Cylinder Unit
SERVICE MANUAL
[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
[Service Ref.]
Refer To page 2.
Cylinder Unit
EHPT20X-VM2C
EHPT20X-VM6C
EHPT20X-YM9C
EHPT20X-TM9C
EHPT20X-MHCW
ERST20C-VM2C
ERST20C-MEC
ERST20D-VM2C
ERST20D-MEC
Notes:
• This manual describes service
data of cylinder unit only.
• RoHS compliant products have
<G> mark on the spec name plate.
MAIN REMOTE
CONTROLLER
R410A
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.
OCH570 REVISED EDITION-B
is void.

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
PARTS CATALOG (OCB570)
September 2016
No. OCH570
REVISED EDITION-C