Viessmann Vitodens 222-F Installation And Service Instructions For Contractors page 87

Checking outputs (actuator test)
Display
"Valve"
"Valve"
"Valve"
"Heating circuit pump
HC2"
"Mixer HC2"
"Mixer HC2"
"Heating circuit pump
HC3"
"Mixer HC3"
"Mixer HC3"
"Output, internal H1
extension"
"Solar circuit pump"
"Solar circuit pump
min."
"Solar circuit pump
max."
"SM1 output 22"
"EA1 output 1"
"AM1 output 1"
"AM1 output 2"
"Output 28"
(cont.)
Explanation
"Heating" Diverter valve set to heating mode
"Middle" Diverter valve in central position (filling/draining)
"WW" Diverter valve set to DHW heating
"ON" Heating circuit pump output active (extension to heating circuit with
mixer)
"Open" "Mixer open" output active (extension to heating circuit with mixer)
"Closed" "Mixer close" output active (extension to heating circuit with mixer)
"ON" Heating circuit pump output active (extension to heating circuit with
mixer)
"Open" "Mixer open" output active (extension to heating circuit with mixer)
"Closed" "Mixer close" output active (extension to heating circuit with mixer)
"ON" Output at internal extension active
"ON" Solar circuit pump output
"ON" Solar circuit pump output on solar control module SM1 switched to
minimum speed
"ON" Solar circuit pump output on solar control module SM1 switched to
maximum speed
"ON" Output
sS
"ON" Contact P - S at plug
"ON" Output A1 at AM1 extension active
"ON" Output A2 at AM1 extension active
"ON" If available: Internal output
on solar control module SM1 active
sF
on solar control module SM1 active
of EA1 extension closed
aBJ
(DHW circulation pump) active
sK
Diagnosis and service scans
87