Checking Outputs (Relay Test) - Viessmann VITODENS 200-W Service Instructions Manual

Diagnosis and service scans
Diagnosis
(cont.)
Brief scan
F
8
F Software
9 version

Checking outputs (relay test)

Weather-compensated control unit
1. Press OK and å simultaneously
for approx. 4 s.
The following relay outputs can be controlled subject to system design:
Display
Start base load
Start full load
Start internal output
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
92
Display
Open Therm extension (if installed)
DHW heat- External hook-up 0 - 10 V
ing status Display in %
2. "Actuator test"
Explanation
Burner operates at minimum output; internal pump
starts
Burner operates at maximum output; internal pump
starts
Internal output sÖ (internal pump) enabled
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)
Solar cen- Output 22
tral heating switching
backup state
0: not ena- 0: OFF
bled 1: ON
1: enabled