Viessmann VITODENS 222-F Installation And Service Instructions Manual page 100

Diagnosis and service scans
Checking outputs (relay test)
Display
Start valve Heating
Start valve centre
Start valve cylinder
Start htg circ pump HC2
Open mixer HC2
Close mixer HC2
Start htg circ pump HC3
Open mixer HC3
Close mixer HC3
Start outp. int. exten. H1
Start AM1 output 1
Start AM1 output 2
Start EA1 output 1
Constant temperature control unit
1. Press OK and å simultaneously
for approx. 4 s.
"Ü" flashes on the display.
2. Select Ú " " and confirm with OK.
3. Select required actuator (output) with
V/v (see following table):
The following actuators (relay outputs) can be controlled subject to system
design:
Display Explanation
1 Burner operates at minimum output; internal pump starts
2 Burner operates at maximum output; internal pump starts
3 Internal output sÖ (internal pump) is enabled
4 Diverter valve set to heating mode
5 Diverter valve in central position (filling/draining)
6 Diverter valve set to DHW mode
10 Internal extension output enabled
100
(cont.)
Explanation
Diverter valve set to heating mode
Diverter valve in central position (filling/draining)
Diverter valve set to DHW mode
Heating circuit pump output enabled (extension to heat-
ing circuit with mixer)
"Mixer open" output enabled (extension to heating circuit
with mixer)
"Mixer closed" output enabled (extension to heating cir-
cuit with mixer)
Heating circuit pump output enabled (extension to heat-
ing circuit with mixer)
"Mixer open" output enabled (extension to heating circuit
with mixer)
"Mixer closed" output enabled (extension to heating cir-
cuit with mixer)
Output at internal extension enabled
Output A1 at extension AM1 enabled
Output A2 at extension AM1 enabled
Contacts P - S at plug aBJ for extension EA1 closed
4. Confirm selected actuator with OK.
The display shows the number for the
activated actuator and "ON".