Viessmann Error Code ODU P6: Inverter module (IPM) fault (outdoor board) (Mini-Split)

Updated October 16, 2026 · by Aurora Star Tech Inc.

Viessmann error code ODU P6 on a mini-split means: Inverter module (IPM) fault (outdoor board). It is also called Viessmann diagnostic code ODU P6.

Critical severityMini-SplitViessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor

Homeowner? What Viessmann code ODU P6 means for you

Stop and call Your ductless mini-split is reporting: Inverter module (IPM) fault (outdoor board). This code is a safety shutdown. Turn the ductless mini-split off and call a licensed technician. Do not keep resetting it. If you smell gas, leave the house and call your gas utility or 911 from outside.

Safe things you can check yourself

Check the remote: fresh batteries and the right mode (Cool, Heat or Auto).
Check the breaker and the outdoor disconnect; both should be ON.

Call (647) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Viessmann error code ODU P6 mean?

Outdoor board display. Indoor shows PC00 (old P0).

Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Viessmann models that use code ODU P6

DLCMHBH24CAK DLCMHBH30DAK DLCMHBH36DAK DLCMHBH48EAK DLCMRBH18BAK DLCMRBH36DAK DLCMRBH48EAK

Other Viessmann Mini-Split codes

Code	Meaning
ODU P0	Compressor top overheat (outdoor board)
ODU P1	High pressure protection (outdoor board)
ODU P2	Low pressure protection (outdoor board)
ODU P3	Current overload (outdoor board)
ODU P4	Discharge temperature protection (outdoor board)
ODU P5	Condenser high temperature (outdoor board)
ODU PH	Compressor pre-heat
ODU RO	Oil return cycle
Off	Timer off
On	Timer on
P0	Inverter module (IPM) fault
P1	Over or under voltage protection

All Viessmann Mini-Split error codes →

Viessmann code ODU P6: homeowner questions

What does Viessmann code ODU P6 mean?

Inverter module (IPM) fault (outdoor board). Outdoor board display. Indoor shows PC00 (old P0).

Is it safe to keep using my ductless mini-split with code ODU P6?

No. Code ODU P6 is a safety shutdown, so keep the ductless mini-split off until a licensed technician has checked it.

Can I reset Viessmann code ODU P6 myself?

Do not keep resetting it. Repeated resets can hide a safety problem; a licensed technician needs to find the cause.

Who can fix Viessmann code ODU P6 near me?

Aurora Star Tech Inc. repairs Viessmann ductless mini-splits in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

Troubleshooting guides

Indoor unit leaking water All brands · Mini-Split
Poor capacity / high head All brands · Mini-Split
Water leaking All brands · Mini-Split
Discharge the inverter capacitors before service Viessmann · Mini-Split
Display shows a strange code or does not answer the remote - DLFSHB indoor Viessmann · Mini-Split
Multi-zone: one room heats, another will not cool - DLC multi-zone Viessmann · Mini-Split
Read live data with the outdoor check button (SW1) Viessmann · Mini-Split
Run the automatic wiring / piping correction Viessmann · Mini-Split

Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Table 27 Outdoor Unit Digital Codes p.32; diagnosis p.68. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.