Vitodens 200-W B2HA 112, 150 Service
71
5683 710 - 09
Checking Outputs (Relay Test)
Diagnosis and Service Scans
1. Press OK and
simultaneously for approximately
4
seconds.
2. “Actuator
test”
The following relay outputs can be controlled subject to system design:
Display
Explanation
All actuators
Off
All actuators are off.
Base load
On
Burner operated at minimum output; circulation pump is started.
Full load
On
Burner operated at maximum output; circulation pump is started.
Output, internal
On
Output
sÖ
active (boiler circuit pump).
Output 21/28
On
Output
sA
active (circulation pump for DHW tank heating).
Htg circ pump HC2
On
Heating circuit pump output enabled (extension to heating circuit with mixing valve).
Mixing valve HC2
Open
“Mixing valve open” output enabled (extension to heating circuit with mixing valve).
Mixing valve HC2
Close
“Mixing valve close” output enabled (extension to heating circuit with mixing valve).
Htg circ pump HC3
On
Heating circuit pump output enabled (extension to heating circuit with mixing valve).
Mixing valve HC3
Open
“Mixing valve open” output enabled (extension to heating circuit with mixing valve).
Mixing valve HC3
Close
“Mixing valve close” output enabled (extension to heating circuit with mixing valve).
Outp. int. exten. H1
On
Output at internal extension enabled.
AM1 output 1
On
Output A1 at extension AM1 enabled.
AM1 output 2
On
Output A2 at extension AM1 enabled.
EA1 output 1
On
Contact P - S at plug
aBJ
of extension EA1 closed.
Solar circuit pump
On
Solar circuit pump output
sF
on solar control module SM1 active.
Solar circuit pump
minimum
On
Solar circuit pump output on solar control module SM1 switched to minimum
speed.
Solar circuit pump
maximum
On
Solar circuit pump output on solar control module SM1 switched to maximum
speed.
SM1 output 22
On
Output
sS
on solar control module SM1 active.