Table Of Contents - Toshiba MMU-UP0031YHP-ETR Service Manual

PRECAUTIONS FOR SAFETY .................................................................................... 6
1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) .................................................... 15
2. WIRING DIAGRAMS .............................................................................................. 16
3. PARTS RATING ...................................................................................................... 17
4. REFRIGERANT CYCLE DIAGRAM ....................................................................... 18
5. CONTROL OUTLINE .............................................................................................. 19
6. COMMUNICATION TYPE, MODEL NAMES AND THE MAXIMUM NUMBER OF
CONNECTABLE UNITS ......................................................................................... 28
6-1. This air conditioning (U series) has new communication specifications, and TU2C-Link
(U series) and TCC-Link (other than U series) differ in a communication type.
For the communication type and the model names such as each unit or remote
controllers, refer to the following table. ............................................................................. 28
6-2. If TU2C-Link (U series) is combined with TCC-Link (other than U series), the wiring
specifications and the maximum number of connectable indoor units during group
control operation will be changed. ................................................................................... 28
7. APPLIED CONTROL AND FUNCTIONS
(INCLUDING CIRCUIT CONFIGURATION) ........................................................... 29
7-1. Indoor controller block diagram (MCC-1643) .................................................................. 29
7-1-1. In Case of Connection of Wired Remote Controller ............................................. 29
7-1-2. In Case of Connection of Wireless Remote Controller ........................................ 30
7-1-3. Connection of Both Wired Remote Controller and Wireless
Remote Controller .................................................................................................... 31
7-2. Indoor Print Circuit Board ................................................................................................. 32
7-3. Test run of indoor unit ...................................................................................................... 34
7-4. Method to set indoor unit function DN code ................................................................... 38
7-5. Applied control of indoor unit .......................................................................................... 44
8. TROUBLESHOOTING ............................................................................................ 63
8-1. Overview ............................................................................................................................. 63
8-2. Troubleshooting method ................................................................................................... 64
8-3. Troubleshooting based on information displayed on remote controller ......................70
8-4. Check Codes Displayed on Remote Controller and SMMS series Outdoor Unit
(7-Segment Display on I/F Board) and Locations to Be Checked ................................ 75
8-5. Diagnostic Procedure for Each Check Code (Indoor Unit) ............................................ 90
8-6. Sensor characteristics ...................................................................................................... 98
8-7. Maintenance list ................................................................................................................. 99
9. P.C. BOARD EXCHANGE PROCEDURES .......................................................... 100
9- 1. Replacement of indoor P.C. boards ............................................................................... 100
10. DETACHMENTS ................................................................................................. 107
11. EXPLODED VIEWS AND PARTS LIST ............................................................. 114
CONTENTS
- 2 -