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MINI-SPLIT SYSTEMS SERVICE MANUAL
Indoor and Outdoor Unit Information
100090
5/2023
1. Safety Precautions ........................................................................ . 3
1.1. Refrigerant Presence ...................................................................3
1.2. Fire Extinguisher ..........................................................................3
1.3. No Ignition Sources .....................................................................3
1.4. Ventilated Workspace ..................................................................4
1.5. Check Refrigeration Equipment ...................................................4
1.6. Check Electrical Devices .............................................................4
1.7. Repair Seal Components ............................................................4
1.8. Repair to Intrinsically Safe Components .....................................4
1.9. Check Cabling .............................................................................4
1.10. Flammable Refrigerant Detection ................................................5
1.11. Remove/Evacuation of Refrigerant ..............................................5
1.12. Charging Procedures ...................................................................5
1.13. Decommissioning .......................................................................6
1.14. Labeling ......................................................................................6
1.15. Recovery .....................................................................................6
Indoor Unit Information .......................................... 7
2. MMA (Mini-Split Multi-Position Air Handler) ............................. 7
2.1. ModelNumberIdentication ........................................................7
2.2. IndoorUnitSpecications ............................................................7
2.4. MMA Indoor Unit Dimensions ......................................................9
2.5. MMA Indoor Unit Clearances .....................................................10
2.6. Indoor Unit Blower Data ............................................................11
3. Noise Criterion Curves ............................................................. 15
3.1. Indoor and Outdoor Power and Communication Wiring
Requirements ...........................................................................17
3.2. Overview ....................................................................................17
3.3. Indoor/Outdoor Unit Match-Ups .................................................18
3.4. Controller Compatibility .............................................................18
3.5. Electrical Wiring Diagrams ........................................................19
3.6. Wiring Guide ..............................................................................20
3.7. Terminal Connections ................................................................22
4. Connection to Centralized Controller, ON/OFF and Alarm De-
vices .......................................................................................... 24
4.1. Centralized Controller ................................................................24
4.2. ON/OFF Devices .......................................................................24
4.3. Alarm Devices ...........................................................................25
4.4. Micro-Switch Introduce ..............................................................25
4.5. Dial Codes .................................................................................26
5. Connecting Cables....................................................................29
Mini-Split Multi-Position Indoor Air Handler (MMA)
MLB & MPC Outdoor Units
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