Table Of Contents; Safety Caution; Combined Refrigerant Pipes Systematic Drawing - Toshiba Super MMU-AP0091H Service Manual

A direct current motor is adopted for indoor fan motor in the Concealed Duct Standard Type air conditioner.
Caused from its characteristics, a current limit works on the direct current motor. When replacing the high-
performance filter or when opening the service board, be sure to stop the fan. If an above action is executed
during the fan operation, the protective control works to stop the unit operation, and the check code "P12"
may be issued. However it is not a trouble. When the desired operation has finished, be sure to reset the
system to clear "P12" error code using the leak breaker of the indoor unit. Then push the operation stop
button of the remote controller to return to the usual operation.
Safety Caution ............................................................................................ 4
1. OUTLINE .................................................................................................. 10
2. WIRING DIAGRAM ................................................................................... 13
3. PARTS RATING ........................................................................................ 26
4. REFRIGERANT PIPING SYSTEMATIC DRAWING ................................. 56
5. COMBINED REFRIGERANT PIPES SYSTEMATIC DRAWING .............. 59
6. CONTROL OUTLINE ................................................................................ 64
7. APPLIED CONTROL ................................................................................ 74
8. TEST OPERATION ................................................................................... 88
9. TROUBLESHOOTING ............................................................................ 128
10. CONFIGURATION OF CONTROL CIRCUIT .......................................... 214
11. BACKUP OPERATIONS (EMERGENCY OPERATION) ........................ 228
12. OIL LEVEL JUDGMENT DISPLAY ........................................................ 233
13. REFRIGERANT RECOVERY
WHEN REPLACING THE COMPRESSOR ............................................ 234
14. LEAKAGE/CLOGGING OF OIL-EQUALIZATION CIRCUIT .................. 240
15. REPLACING COMPRESSOR ................................................................ 242
16. REOLACING METHOD OF PARTS ....................................................... 249
17. P.C. BOARD EXCHANGE PROCEDURES ............................................ 259
NOTE
CONTENTS