HVACopediaMidea · technician tips
Midea service menus, test modes and resets
4 tips for furnace, mini split: access codes, button combinations, test modes and the resets you need at the appliance.
Jump to: Service & test modes (2) · Reset & cancel (1) · Other (1)
Service & test modes
Forced fan, low and high fire, test and diagnostic modes, error history and live data.
Read live data with the outdoor check button (SW1)
Mini split · Midea DLCM(R/H)B multi-zone outdoor
Each press of SW1 steps through a value on the outdoor display.
- Press 1 = number of indoor units talking. 2 = mode (0 off, 1 fan, 2 cool, 3 heat, 4 forced cool, A forced defrost).
- Presses 17-21 = T2B per zone, 22-26 = room temp per zone, 27-31 = coil temp per zone, 32 = T3, 33 = T4, 34 = discharge temp.
- Press 45 (all sizes) = last fault or protection (00 = none). See the check switch table for the full list; the 18K board uses a slightly different order.
Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)
Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Tables 25-26 p.29-31. Written in our own words; check the manual for your exact model.
Run the automatic wiring / piping correction
Mini split · Midea DLCM(R/H)B multi-zone outdoor
The outdoor unit can find and fix crossed wiring vs piping ports by itself.
- Outdoor temperature must be above 41 F (5 C). Indoor units do not need to be running.
- Hold CHECK (SW1) on the outdoor board about 6 seconds until CE shows (FA may show first, keep holding).
- Indoor units go to 76 and the compressor runs for about 5-10 minutes.
- When CE changes to 00 it is done. Set each indoor unit back with its remote (they stay at 76).
Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)
Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Automatic Wiring/Piping Correction p.6. Written in our own words; check the manual for your exact model.
Reset & cancel
Clearing lockouts, service reminders and fault history; skipping purge or de-air programs.
Clear an ignition lockout (E7) early
Furnace · Midea 96% AFUE A2L Gas Furnace (BGH96M)
After two failed ignition attempts the control locks out with E7.
- Remove 115 V power or the thermostat call for 1-20 s.
Applies to: BGH96M060B3A, BGH96M080B3A, BGH96M080C4A, BGH96M100C5A, BGH96M100D5A, BGH96M120D5A
Source: Midea A2L 96% AFUE Gas Furnace Troubleshooting Guide, Appendix A Sequence of Operation, Figures 24-26, p.7, 11, 24-26. Written in our own words; check the manual for your exact model.
Other
Everything else worth knowing at the appliance.
Discharge the inverter capacitors before service
Mini split · Midea DLCM(R/H)B multi-zone outdoor, Midea DLFSHBH wall indoor (DLCM multi-zone)
The big electrolytic capacitors on the outdoor board stay charged after power-off.
- Turn power off and lock out.
- Put a resistor of about 100 ohm 40 W (or a soldering iron plug) across the + and - capacitor terminals before touching the board.
Applies to: DLCM(R/H)B multi-zone outdoor units with DLFSHBH high wall indoor units (Midea, Carrier, Viessmann)
Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Troubleshooting Safety p.16. Written in our own words; check the manual for your exact model.
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For licensed technicians. Installer menus, test modes and access codes change settings that affect safety; only use them if you are trained on the appliance and understand the result. Gas, electrical and refrigerant work must be done by a qualified, licensed person, and the manufacturer’s manual for the exact model and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.