Mini-split troubleshooting guides

9 guides. Not cooling or heating, leaks and communication faults on ductless systems. Each one lists the likely causes and what to check, in order.

All brands (3)

• Indoor unit leaking water
  Water drips from the indoor head.
• Poor capacity / high head
  Possible causes and checks for: poor capacity / high head.
• Water leaking
  Possible causes and checks for: water leaking.

Carrier (2)

• Display shows a strange code or does not answer the remote - DLFSHB indoor
  The indoor display shows a code that is not in the tables, or the unit ignores the remote.
• Multi-zone: one room heats, another will not cool - DLC multi-zone
  On a multi-zone system the indoor units cannot heat and cool at the same time.

Midea (2)

• Display shows a strange code or does not answer the remote - DLFSHB indoor
  The indoor display shows a code that is not in the tables, or the unit ignores the remote.
• Multi-zone: one room heats, another will not cool - DLC multi-zone
  On a multi-zone system the indoor units cannot heat and cool at the same time.

Viessmann (2)

• Display shows a strange code or does not answer the remote - DLFSHB indoor
  The indoor display shows a code that is not in the tables, or the unit ignores the remote.
• Multi-zone: one room heats, another will not cool - DLC multi-zone
  On a multi-zone system the indoor units cannot heat and cool at the same time.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.