80
Carrying out a function check
The function test serves to check the proper function-
ing of the different system components.
Service menu:
1. Press OK + å simultaneously and hold for
approx. 4 s.
2. "Service functions"
3. "Function check"
4. Start the required function, e.g. "DHW". Only those
functions are shown that correspond to the actual
system equipment level.
During the function check, the system overview is
displayed.
5. Terminate function with .
"Vitotronic 200" service instructions
4-way diverter valve in the outdoor unit
■
In heating mode, the 4-way diverter valve is live.
■
The 4-way diverter valve in the outdoor unit is at zero
volt in cooling mode. The heat pump is operated in
reverse (refrigerant circuit reversal).
■
If the 4-way diverter valve was at zero volt when the
heat pump was started, the heat pump starts in
reversible operation.
Resetting the high limit safety cut-out: Type AWB(-M)-E/AWB(-M)-E-AC
Fig. 63
A
High limit safety cut-out reset button
!
Please note
If the heat pump is exposed to temperatures
below –15 °C, e.g. during storage or transport,
the high limit safety cut-out of the instantaneous
heating water heater may respond. In this case,
the instantaneous heating water heater will not
heat up.
Heat up the high limit safety cut-out to above
20 °C. Press the reset button of the high limit
safety cut-out.
Note
The high limit safety cut-out can only be reset if the
temperature at the sensor is below 85 –8 °C.
Instructing the system user
The system installer should hand the operating instruc-
tions to the system user and instruct the user in oper-
ating the system. This also includes all components
added as accessories, such as remote controls.
Equipment and functions of the heating system must
be entered in the form in the appendix to the operating
instructions.
The system installer should also provide information
on the required maintenance.
Commissioning, inspection, maintenance
Checking the system function (cont.)
6199585
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