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Carrier Ductless / Mini Split ® Toshiba Ductless Variable Flow (VRF) 12000 Btu Indoor Compact 4-Way Cassette Unit R-410A (208/230-1-60)

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Carrier Commercial Ductless / Mini Split - MMUM-U Ductless / Mini Split Repair, maintenance, and replacement planning

Technical Specifications

Product Specs

  • Model: MMU-UP0121MHP-UL
  • Manufacturer Number: MMU-UP0121MHP-UL
  • Vendor Number: MMU-UP0121MHP-UL
  • Catalog Brand: Toshiba Carrier
  • Product Family: MMUM-U
  • AHRI Usage: Indoor AHU
  • Approvals: ETL Listed
  • Brand: Toshiba Carrier
  • CFM: 200-350
  • Color: White
  • Cooling Capacity: 12,000
  • Cycle/Hertz: 60 Hz
  • Energy Star Rated: NO
  • Heating Capacity: 13,500
  • Height: 10.125
  • Length: 22.625
  • Liquid Line Fitting Type: Flare
  • Liquid Line Size (OD): 1/4"
  • Maximum Overcurrent Protection (MOCP): 15
  • Mounting Type: Ceiling Cassette
  • Phase: Single
  • Prop 65: YES
  • Refrigerant: R-410A
  • Sound Level (dBA): 27-38
  • Suction Line Fitting Type: Flare
  • Suction Line Size (OD): 3/8"
  • Tonnage: 1
  • Voltage: 208-230 VAC
  • Weight: 35.3
  • Width: 22.625

Useful troubleshooting details

  • Confirm the exact model number, serial number, installed equipment type, and site voltage before service or replacement planning.
  • Match replacement equipment and accessories against current Carrier compatibility requirements, refrigerant type, capacity, airflow, and local code requirements.

Service planning

How GreenFlow handles Carrier® Toshiba Ductless Variable Flow (VRF) 12000 Btu Indoor Compact 4-Way Cassette Unit R-410A (208/230-1-60) requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Our Happy Customers

Anna F.

They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.

Murali S.

HVAC technician was punctual, followed up well, completed quick repairs, ensured the issue was resolved, and provided helpful recommendations.

Dev W.

I had a breakdown of my cooling system and Hanna at Green Flow responded to my request right away. They scheduled me same day. The team at Green Flow was easy to communicate with over phone and text. They kept me updated on delays on arrival of the...

Melissa S.

The repair person came quickly and was super efficient and polite, and showed me what to do next time. He gave my dog a quick pay and was off again.

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