HVACopedia

Midea · Mini-split

ODU E5 Over or under voltage (outdoor board)

High severity Midea DLCM(R/H)B multi-zone outdoor

What the control is telling you

Outdoor board display. Indoor shows PC10/PC11/PC12 (old P1).

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

Test and repair steps

  1. Safety kill power at the disconnect and wait for the inverter capacitors to discharge before touching boards or wiring.
  2. Measure supply voltage L1-L2 at the outdoor unit: about 187-253 VAC is acceptable.
  3. Measure DC across P and N on the IPM board: 277-356 V for 18-27K, 277-410 V for 36-48K.
  4. On 2-3 zone units also check DC across the bridge rectifier + and -: 190-250 V is normal.
  5. If the supply is good, replace parts in this order and retest: bridge rectifier (4-5 zone units), IPM board, outdoor main board.

Models that show this code

7 models in Midea DLCM(R/H)B multi-zone outdoor

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK

Other codes on the same units

  • ODU E0 Outdoor EEPROM error (outdoor board)
  • ODU E2 Indoor / outdoor communication error (outdoor board)
  • ODU E3 IPM to main board communication error (outdoor board)
  • ODU E4 Outdoor or T2B sensor fault (outdoor board)
  • ODU E6 PFC module protection (outdoor board)
  • ODU E8 Outdoor fan speed fault (outdoor board)
  • ODU Ed Adapter / inverter board to main board communication error
  • ODU F1 Zone A coil outlet sensor (T2B-A) fault

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

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.52-55. 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.