HVACopediaViessmann · Mini-split
EH00 Indoor EEPROM error
What the control is telling you
The indoor main chip gets no answer from its EEPROM chip. Also shown as EH0A.
Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units
Likely causes
- Bad indoor PCB
Test and repair steps
- Safety kill power at the disconnect and wait for the inverter capacitors to discharge before touching boards or wiring.
- Power off 2 minutes and restart.
- If it comes back, replace the indoor main PCB.
Models that show this code
5 models in Viessmann DLFSHB high wall indoor
Other codes on the same units
- EC54 Discharge temperature sensor (TP/T5) fault
- EC56 Indoor coil outlet sensor (T2B) fault
- EH0A Indoor EEPROM error
- EH0b Indoor PCB to display board communication error
- EH02 Zero-crossing signal error
- EH03 Indoor fan speed out of range
- EH30 Indoor external fan low voltage
- EH31 Indoor external fan over voltage
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Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17, p.25. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
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.