Checking Outputs (Relay Tests) - Viessmann Vitocrossal 300 Service Manual

Vitocrossal 300 CU3A 26 to 57 Service

Checking Outputs (relay tests)

1. Press OK and simultaneously for approximately
4 sec.
2. "Actuator test"
The following relay outputs can be controlled subject to system design:
Display
Base load
Full load
Output, internal
Htg circ pump HC2
Mixing valve HC2
Mixing valve HC2
Htg circ pump HC3
Mixing valve HC3
Mixing valve HC3
Outp. int. exten. H1
EA1 output 1
Solar circuit pump
Solar circ pmp min
Solar circ pmp max
Solar output sS
SA 104 output 1
SA 104 output 2
SA 104 output 3
Explanation
Start Burner operated at minimum output; heating circuit A1 pump is on.
Start Burner operated at maximum output; heating circuit A1 pump is on.
Start
Output sA active (DHW Pump) enabled.
Start Heating circuit pump output enabled (extension to heating circuit with mixing
valve)
Open "Mixing valve open" output enabled (extension to heating circuit with mixing valve)
Close "Mixing valve closed" output enabled (extension to heating circuit with mixing valve)
Start Heating circuit pump output enabled (extension to heating circuit with mixing valve)
Open "Mixing valve open" output enabled (extension to heating circuit with mixing valve)
Close "Mixing valve closed" output enabled (extension to heating circuit with mixing valve)
Start Output at internal extension H1 enabled
Start
Contact P - S on plug aBJ for extension EA1 closed
Start
Solar circuit pump sF output at solar control module SM1 enabled
Start Solar circuit pump output at solar control module SM1 switched to min. speed
Start Solar circuit pump output at solar control module SM1 switched to max. speed
Start
Output sS at solar control module SM1 enabled
Start
DHW recirculation pump output sK
Start
Output heating circuit pump A1 sÖ
Start
Troubleshooting
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