High Temperature Difference Heating System; Water - IVT X Series Manual

2.3.6

High temperature difference heating system

water

6 720 643 196-05.1I
Description: The temperature difference between T8 and T9 is greater than X, where X is calculated as a linear
function of the compressor frequency. 20Hz=10K and 90Hz=18K.
Check
1. B Clean the dirt filter on the hot side.
2. B Go to temperatures and check the
value on T8 and T9.
B Use a digital thermometer and meas-
ure at the sensor.
Do the values correspond?
3. B Check the flow in the heating system.
4. The heating system is not sufficiently
large for the relevant heat pump.
Tab. 6
6 720 643 196 (2010/02)
Action
B Remove the filter basket and clean it.
Does the error message recur?
yes: 3
no: B Check the sensors and replace if necessary.
Does the error message recur?
B Check that the thermostat valves are open.
Does the error message recur?
B Expand the system volume (volume tank or several
radiators).
Rectify interference
2
4
4
13