Viessmann FB2B Installation And Service Instructions Manual page 102

Diagnosis and service scans
Checking outputs (actuator test)
Display
Htg circ pump HC3 start
Mixer HC3 open
Mixer HC3 close
Outp. int. exten. H1 start
AM1 output 1 start
AM1 output 2 start
EA1 output 1 start
Solar circuit pump start
Solar circ pmp min start
Solar circ pmp max start
102
(cont.)
Explanation
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)
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
Solar circuit pump sF output at solar control module SM1
enabled
Solar circuit pump output at solar control module SM1
switched to minimum speed
Solar circuit pump output at solar control module SM1
switched to maximum speed