Table Of Contents - Toyotomi MTN-MTG 256DV Service Manual

1. Precaution ................................................................................................................................................. 1
1.1 Safety Precaution ................................................................................................................................................ 1
1.2 Warning ............................................................................................................................................................... 1
2. Function .................................................................................................................................................... 4
3. Dimension ................................................................................................................................................. 6
3.1 Indoor Unit ........................................................................................................................................................... 6
3.2 Outdoor Unit ........................................................................................................................................................ 7
4. Specification ............................................................................................................................................. 8
5. Refrigerant cycle diagram ....................................................................................................................... 9
6. Wiring diagram ....................................................................................................................................... 10
6.1 Indoor Unit ......................................................................................................................................................... 10
6.2 Outdoor Unit ...................................................................................................................................................... 10
7. Installation details .................................................................................................................................. 11
7.1 Wrench torque sheet for installation .................................................................................................................. 12
7.2 Connecting the cables ....................................................................................................................................... 12
7.3 Pipe length and the elevation ............................................................................................................................ 12
7.4 Air purging of the piping and indoor unit ............................................................................................................ 12
7.5 Pumping down (Re-installation) ......................................................................................................................... 14
7.6 Re-air purging (Re-installation) .......................................................................................................................... 15
7.7 Balance refrigerant of the 2-way, 3-way valves ................................................................................................. 16
7.8 Evacuation ......................................................................................................................................................... 17
7.9 Gas charging ..................................................................................................................................................... 18
8. Operation characteristics ...................................................................................................................... 19
8.1 ............................................................
8.2
9. Electronic function ................................................................................................................................. 21
9.1 Abbreviation ...................................................................................................................................................... 21
9.2 Display function ................................................................................................................................................. 21
9.3 Protection .......................................................................................................................................................... 21
9.4 Fan-Only Mode .................................................................................................................................................. 22
9.5 Cooling Mode .................................................................................................................................................... 22
9.6 Drying mode ...................................................................................................................................................... 24
9.7 Heating mode .................................................................................................................................................... 24
9.8 Auto mode function ........................................................................................................................................... 27
9.9 Forced operation function .................................................................................................................................. 28
9.10 Action of 4-way valve ...................................................................................................................................... 28
9.11 Two speeds outdoor fan function ..................................................................................................................... 28
9.12 Timer function .................................................................................................................................................. 29
9.13 Sleep function mode ........................................................................................................................................ 29
9.14 Auto-Restart function ....................................................................................................................................... 29
9.15 Ionizer/Plasma dust collector function(optional) .............................................................................................. 30
9.16 Outdoor chassis heating cable ...................................................................................................................... 30
10. Troubleshooting ................................................................................................................................... 30
10.1 Indoor Unit Error Display ................................................................................................................................. 32
10.2 Diagnosis and Solution .................................................................................................................................... 33
10.3 Key parts checking. ......................................................................................................................................... 36
CONTENTS
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