Brand entry point
Mitsubishi Heavy Industries equipment & support entry point
Mitsubishi Heavy Industries is a separate equipment brand from Mitsubishi Electric. Use MHI’s regional service resources and actual model; Electric’s controllers, fault charts and part numbers are not substitutes.
Open official resource ↗Opens the publisher’s source in a new tab. PDFs may be large; browser support for page links varies.
Document applicability
- Publisher
- Mitsubishi Heavy Industries
- Edition
- Brand directory · document availability and editions vary
- Format
- Website
- Region
- International; select regional distributor
- Access
- Public entry; some documents or tools may require a manufacturer account
- Index review
- 2026-09-30; confirm the publisher’s current revision before use
- Source
- www.mhi-mth.co.jp
Cross-check the diagnosis
These original learning guides explain possible causes and lookalikes. The publisher’s exact-model procedure controls on live equipment.
Ductless remote, wired control and Wi-FiMini-split communication and interconnectMini-split inverter and power electronicsMini-split temperature sensors and thermistorsElectronic expansion valve (EEV)Ductless DC fan, wheel and louversMini-split drain, pump and insulationMini-split refrigerant piping and chargeMulti-zone pairing, ports and mode controlDuctless heating, defrost and outdoor drainage
Build your call worksheet →Before applying this reference
- Match full equipment and controller models, refrigerant, region and document revision.
- Use the unit wiring label and OEM specifications. A related brand name or similar cabinet does not prove compatibility.
- Isolate power, secure against restart and prove it absent before resistance tests or repairs. Follow approved capacitor and inverter discharge procedures.
- Preserve safety interlocks and refrigerant mitigation. Stop on unsafe conditions or suspected leakage.