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Viessmann service menus, test modes and resets

8 tips for boiler, mini split: access codes, button combinations, test modes and the resets you need at the appliance.

Jump to: Access & passwords (1) · Service & test modes (3) · Reset & cancel (1) · Settings shortcuts (1) · Commissioning (1) · Other (1)

Access & passwords

Installer and service menu codes, and how to get into them.

Open the Service menu (password viservice)

Boiler · Vitodens 200-W B2HE

The touchscreen Service menu holds diagnosis, actuator test, parameters, message history and service functions. It closes on its own after 30 minutes.

  1. Menu > Service
  2. Enter the password viservice (factory default)
  3. If passwords were changed and lost, Viessmann Technical Service issues a master password

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions (6167 813-24), Service menu. Written in our own words; check the manual for your exact model.

Service & test modes

Forced fan, low and high fire, test and diagnostic modes, error history and live data.

Actuator test: drive fan, burner, pump and 3-way valve by hand

Boiler · Vitodens 200-W B2HE

Each actuator test function runs for 30 s: fan rpm, burner Off / Min / Max heating / Max DHW, 3-way valve Heating / Centre / DHW, pump speeds, mixers, zone pumps.

  1. Service menu > Actuator test
  2. Pick the group (Boiler, Heating, DHW, Solar) and the function
  3. Function stays active 30 s, then drops out

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions (6167 813-24), Actuator test. Written in our own words; check the manual for your exact model.

Read live data with the outdoor check button (SW1)

Mini split · Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor

Each press of SW1 steps through a value on the outdoor display.

  1. Press 1 = number of indoor units talking. 2 = mode (0 off, 1 fan, 2 cool, 3 heat, 4 forced cool, A forced defrost).
  2. 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.
  3. 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 · Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor

The outdoor unit can find and fix crossed wiring vs piping ports by itself.

  1. Outdoor temperature must be above 41 F (5 C). Indoor units do not need to be running.
  2. Hold CHECK (SW1) on the outdoor board about 6 seconds until CE shows (FA may show first, keep holding).
  3. Indoor units go to 76 and the compressor runs for about 5-10 minutes.
  4. 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 the service message (P.1 / P.8)

Boiler · Vitodens 200-W B2HE

A service message you acknowledge without resetting comes back the next Monday. Reset it through parameter 1411.0.

  1. Service menu > System configuration > Boiler
  2. Set parameter 1411.0 Clear maintenance messages to ON
  3. Set the next interval in 521.0 (burner hours) or 522.3 (months)

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions (6167 813-24), Parameters: Boiler; P.1/P.8. Written in our own words; check the manual for your exact model.

Settings shortcuts

Where the useful parameters live and what they are set to from the factory.

Where the fault history lives

Boiler · Vitodens 200-W B2HE

The message history keeps the 10 most recent faults with their subscriber numbers (CAN 1 HMU, CAN 50 BCU, CAN 59 HMI, CAN 60 fan, 81 MZIO).

  1. Service menu > Message history

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions (6167 813-24), Message history. Written in our own words; check the manual for your exact model.

Commissioning

Start-up and set-up steps that are easy to miss.

Filling and purging programs (20 min auto-stop)

Boiler · Vitodens 200-W B2HE

Purging cycles the pump 30 s on/off and toggles the diverter valve for 20 min with the burner off. Filling parks the diverter valve in the middle and runs the pump; both stop by themselves after 20 min.

  1. Service menu > Service functions > Filling or Purging
  2. Program ends automatically after 20 min; exit Service to stop earlier

Applies to: Vitodens 200-W B2HE 85, 120, 150, 199

Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions (6167 813-24), Function description p.82. 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 · Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor, Viessmann DLFSHB high wall indoor

The big electrolytic capacitors on the outdoor board stay charged after power-off.

  1. Turn power off and lock out.
  2. 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.