Installing The Programming Unit - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Installation sequence
Power supply
(cont.)
Explanation of the LED indicators (number of flashes)
L1 L2
HOLD TO TEST
PUSH TO RESET
SMC-3
OVLD SETTING
LED STATUS
ON RUN/ON RUN/FAULT
1 OLVD
2 TEMP
3 PHASE REVERSAL
4 PHASE LOSS/OPEN LOAD
5 PHASE IMBALANCE
6 SHORTED SCR
7 TEST
A1 A2 IN1 IN2 97 98 13 14
T1 T2
Fig.36
1 Overload
2 Excess temperature
3 Phase reversal
4 Phase loss / Motor not connected

Installing the programming unit

Note
The programming unit is delivered inside the wiring
chamber of the heat pump. Only fit the programming
unit after all electrical connections have been made.
52
L3
T3
5 Phase asymmetry
6 Short-circuited Thyristor
7 Test
In order to fit the programming unit, remove the front
panel of the heat pump. Click the programming unit
into the recess provided. Connect the RS12 data cable
to the programming unit.