Measures if the room temperature is constantly too low
Carry out the following steps in the
order listed here to remedy the pro-
blem.
1.
Increase the set room temperature
for standard operation (see operat-
ing instructions, section "Selecting
the room temperature").
2.
Check the outside temperature
sensor (see page 49).
3.
Adjust the heating curves (see
operating instructions).
4.
Vent the heating circuit.
5.
Hydraulically balance the con-
nected heating circuit(s).
6.
Check the flow rate of the heating
circuit(s) concerned.
7.
Enable the heating operation via
the integral electric heater (see
page 89).
No indication on the programming unit display
Carry out the following steps in the
order listed here to remedy the pro-
blem.
1.
Start the equipment at the main
isolator (if installed) and at the sys-
tem ON/OFF switch (see page 39).
2.
Check the fuse; replace it if
required (see page 40).
3.
Check whether there is voltage at
the power feed to the control unit/
electronics; provide power if
required.
4.
Check the plug-in and threaded
connections.
5.
Replace the power supply unit.
6.
Replace the programming unit.
7.
Replace the main PCB.
Diagnosis
64
Troubleshooting
55
92
901
GB
Summary of Contents for VITOCAL 300
Page 19: ...Connection diagram Open CLOSE System version 1 cont 19 Preparing for installation 5592 901 GB...
Page 22: ...Connection diagram Open CLOSE System version 2 cont 22 Preparing for installation 5592 901 GB...
Page 137: ...Control PCB 137 Connection and wiring diagrams 5592 901 GB Service...
Page 140: ...Parts lists cont 140 Parts lists 5592 901 GB...
Page 141: ...Parts lists cont 141 Parts lists 5592 901 GB Service...
Page 159: ...159 5592 901 GB...
