Checking Outputs (Actuator Test) - Viessmann FB2B Installation And Service Instructions Manual

Diagnosis
(cont.)
Line (brief
scan)
1
Internal circulation
pump
8: Variable
speed
pump
0: without
1: Wilo
2: Grund-
fos
9: Internal details for calibration

Checking outputs (actuator test)

1. Press OK and å simultaneously
for approx. 4 s.
The following relay outputs can be controlled subject to system design:
Display
Base load start
Full load start
Outp. internal start
Start valve heating
Start valve centre
Start valve cylinder
Htg circ pump HC2 start
Mixer HC2 open
Mixer HC2 close
Field
2 3
Heating circuit
pump, heating cir-
cuit M2
Software Variable
version speed
variable pump
speed 0: with-
pump out
0: no var- 1: Wilo
iable 2: Grund-
speed fos
pump
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 close" output enabled (extension to heating circuit
with mixer)
Diagnosis and service scans
4 5
Heating circuit pump,
heating circuit M3
Software Variable
version speed
Variable pump
speed 0: with-
pump out
0: no vari- 1: Wilo
able 2: Grund-
speed fos
pump
Software
version
Exten-
sion AM1
6
Software
version
Variable
speed
pump
0: no varia-
ble speed
pump
Software
version
Extension
EA1
101