1-1 Precautions for the Service ..................................................................................................................................................3

1-2 Precautions related to static electricity and PL ..........................................................................................................3

1-3 Precautions for the Safety ....................................................................................................................................................4

1-4 Precautions for handling a system containing refrigerants .................................................................................5

1-5 Precautions for the brazing .................................................................................................................................................5

1-6 Precautions for charging refrigerants .............................................................................................................................5

2. General Overview ......................................................................................................6

2-1 Features of the System ..........................................................................................................................................................6

2-1-1 Key features of the EHS(TDM PLUS) ......................................................................................................................7

2-1-2 Changes in comparison to basic model ..............................................................................................................8

2-1-3 Structure of product ..................................................................................................................................................10

2-2 Model names of Indoor/Outdoor Unit .......................................................................................................................11

2-2-1 Indoor Unitt ...................................................................................................................................................................11

2-3 Combination and Connection Ratio limitation ......................................................................................................12

2-4 Components and Feature .................................................................................................................................................13

2-5 Product Specifications ........................................................................................................................................................14

2-5-1 Outdoor Unit .................................................................................................................................................................14

2-5-2 Hydro Unit ......................................................................................................................................................................16

2-5-3 TANK INTEGRATED HYDRO UNIT .........................................................................................................................17

2-5-4 Option code of Hydro Unit .....................................................................................................................................18

2-6 Accessory and Option Specifications ........................................................................................................... 19

2-6-1 Controller ........................................................................................................................................................ 19

2-6-2 Piping ............................................................................................................................................................... 20

2-6-3 Indoor .............................................................................................................................................................. 21

3. Disassembly and Reassembly .................................................................................

3-1 Necessary Tools.....................................................................................................................................................................22

3-2 Disassembly and Reassembly ......................................................................................................................... 23

3-2-1 Hydro Unit ......................................................................................................................................................................24

3-2-2 Outdoor Unit .................................................................................................................................................................32

3-2-3 TDM PLUS Tank Integrated Hydro Unit .............................................................................................................63

4. Troubleshooting ..................................................................................................... 62

4-1 Error Display ............................................................................................................................................................................62

4-2 Service Operation .................................................................................................................................................................63

4-2-1 Special Operation .......................................................................................................................................................63

4-2-2 TDM PLUS EEPROM Code Tabel ...........................................................................................................................65

4-2-3 Wired remote controller error code ....................................................................................................................66

4-3 Troubleshooting by symptoms ......................................................................................................................................68

4-3-1 Communication error after finishing Tracking ..............................................................................................68

4-4 Hydro Unit ...............................................................................................................................................................................69

4-4-1 EEPROM error .............................................................................................................................................................69

4-4-2

: Error due to abnormal data of Wired remote controller thermistor value ............70