Steps If The Room Temperature Is Too Low - Viessmann VITOCAL 300-G Installation And Service Instructions Manual

Troubleshooting
Function check
Function
Solar
Primary source
Note
The execution of this function
lasts 10 min.

Steps if the room temperature is too low

1. Vent the heating circuits.
2. Check throughput of affected heating
circuits. Recommended temperature
differential between heating flow and
return approx. 8 K.
3. Hydraulically balance the connected
heating circuits.
4. Check the outside temperature sen-
sor (see page 166).
No display indication on the programming unit
1. Switch ON system ON/OFF switch.
2. Check heat pump control unit fuse;
replace if required (see page 167).
164
(cont.)
System characteristics
If the Vitosolic is connected, the display for the solar
circuit pump is activated in the system overview. Start
the solar circuit pump via the Vitosolic (see Vitosolic
service instructions).
The primary pump starts. The primary circuit flow
temperature is averaged every minute.
Note
This function determines the temperature of the
undisturbed ground.
If the function is terminated earlier, the average value
calculated at the time of the termination is saved.
5. Increase the set room temperature
for standard mode and match the
heating curves.
Operating instructions
6. Enable heating operation via the inte-
gral instantaneous heating water
heater (if installed) (see page 196).
3. Check whether there is power at the
control unit; switch ON power supply
if required.
4. Check the plug-in and threaded con-
nections.