– 4 –
9-9. Sensor Characteristics .................................................................................................... 202
9-10. Pressure sensor output check ...................................................................................... 205
10. BACKUP OPERATION (EMERGENCY OPERATION) ...................................... 207
10-1. Note for Backup Operation ............................................................................................ 207
10-2. Compressor Backup Operation Setting ....................................................................... 208
10-3. Backup Setup for Outdoor Unit .................................................................................... 209
11. OUTDOOR UNIT REFRIGERANT RECOVERY METHOD ............................... 210
11-1. Refrigerant Recovery from Failed Outdoor Unit (Pump-Down) ................................. 210
11-1-1. Note for refrigerant recovery operation ....................................................................... 210
11-1-2. Refrigerant recovery procedure A
(Case of no outdoor unit backup operation setting) ................................................... 210
11-2. How to Operate System While Failed Outdoor Unit Being Repaired ........................ 214
11-3. Work procedure after Repair ......................................................................................... 215
12. REPLACING COMPRESSORS ......................................................................... 216
12-1. Compressor Replacement Procedure (Outline) .......................................................... 216
12-2. Replacement of Compressors ...................................................................................... 217
12-3. Check Procedure to Search Cause of Compressor Oil Shortage ............................. 221
13. OUTDOOR UNIT PARTS REPLACEMENT METHODS .................................... 223
14. P.C. BOARD EXCHANGE PROCEDURES........................................................ 243
14-1. List of service P.C. boards ............................................................................................. 243
14-2. Configuration of inverter assembly .............................................................................. 243
14-3. Interface board replacement procedure....................................................................... 245
14-4. Comp-IPDU P.C. Board (MCC-1595) replacement procedure ..................................... 246
14-5. Comp-IPDU P.C. Board (MCC-1595) replacement procedure ..................................... 248
14-6. Fan IPDU P.C. board (MCC-1610) replacement procedure ......................................... 250
14-7. Noise Filter P.C. Board (MCC-1608 A, B) Replacement Procedure ............................ 251
14-8. Noise Filter P.C. Board (MCC-1625 A, B, C).................................................................. 254
15. EXPLODED DIAGRAM / PARTS LIST .............................................................. 257
15-1. MMY-MAP0724FT9UL ..................................................................................................... 257
15-2. MMY-MAP0964FT9UL, MMY-MAP1204FT9UL .............................................................. 264
15-3. MMY-MAP0724FT6UL ..................................................................................................... 271
15-4. MMY-MAP0964FT6UL, MMY-MAP1204FT6UL .............................................................. 278
15-5. Flow Selector Unit .......................................................................................................... 285
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