Checking Outputs (Actuator Test) - Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual

Diagnosis and service scans

Checking outputs (actuator test)

Weather-compensated control unit
1. Press OK and å simultaneously for
approx. 4 s.
2. "Actuator test"
The following relay outputs can be controlled subject to system design:
Display
All actuators
Base load
Full load
Output, internal
Output 21/28
Valve
Valve
Valve
Htg circ pump
HC2
Mixer HC2
Mixer HC2
Htg circ pump
HC3
Mixer HC3
Mixer HC3
Outp. int. exten.
H1
AM1 output 1
AM1 output 2
EA1 output 1
118
Explanation
OFF All actuators are off
ON Burner operates at minimum output; internal pump
starts
ON Burner operates at maximum output; internal pump
starts
ON Internal output sÖ active (internal circulation pump)
ON Internal output sA active (only if circulation pump is
connected)
Heating Diverter valve set to heating mode
Centre Diverter valve in central position (filling/draining)
DHW Diverter valve set to DHW mode
ON Heating circuit pump output enabled (extension to
heating circuit with mixer)
Open "Mixer open" output enabled (extension to heating
circuit with mixer)
Close "Mixer close" output enabled (extension to heating
circuit with mixer)
ON Heating circuit pump output enabled (extension to
heating circuit with mixer)
Open "Mixer open" output enabled (extension to heating
circuit with mixer)
Close "Mixer close" output enabled (extension to heating
circuit with mixer)
ON Output at internal extension enabled
ON Output A1 at extension AM1 enabled
ON Output A2 at extension AM1 enabled
Contact P - S at plug aBJ of extension EA1
ON
closed