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ERROR MANAGEMENT
6 720 806 630 (2013/02) 15
Open the valves.
13.6.3 HIGH TEMPERATURE DIFFERENCE HEAT TRANSFER FLUID
Fig. 34
This warning window is displayed when the temperature difference
between sensors T8 and T9 becomes too high.
PROBABLE CAUSE 1; BLOCKED PARTICLE FILTER:
Clean filter (chapter 12.8)
▶Select Acknowledge.
Contact the installer in the event of repeated warnings.
POSSIBLE CAUSE 2: INADEQUATE FLOW RATE ACROSS THE
HYDROLIGHT/HYDROCOMFORT UNIT.
▶Select Acknowledge.
Check that all the valves are open. The thermostat valves in heating
systems should be fully open and in floor heating systems at least half
of the coils should be fully open.
Contact the installer in the event of repeated warnings.
13.6.4 TOO SHORT CHANGEOVER TIME FOR FLOOR HEATING
In the info log is stored Too short changeover time for floor heating.
The warning appears if the value Delay before is set to a shorter time
than 7hours or the value Delay after is set shorter than 7 hours, which
is not recommended during underfloor heating.
13.7 INFORMATION WINDOW
13.7.1 LOW MAINS VOLTAGE
If the mains voltage falls below 170 V, the information symbol in the
display lights up. If the mains voltage is below 170 V for one hour, an
alarm is triggered.
Contact the installer in the event of repeated warnings.
13.8 INFO SYMBOL
For a number of events that occur when the heat pump is in operation,
an icon appears in the display without an alarm being triggered.
Although these events do not require immediate action, they are saved
in the information report.
Once the text in the information report has been read the icon vanishes
from the display.
13.8.1 HEAT PUMP OPERATING TEMPERATURES
If the outdoor temperature exceeds 46 °C in 30 minutes, the Info icon is
activated. The booster heater takes over operation of the system.
Confirmation is given if the temperature once again falls below 46 °C.
If the outdoor temperature falls below the set value in Block heat pump
at low outdoor temperature (factory value = – 15 °C) the heat pump
stops. The warning is activated and the heating installation switches to
operating with only additional heat.
13.8.2 MAXIMUM FLOW TEMPERATURE, HEAT PUMP
The temperature in the system has reached the maximum temperature
for the heat pump.
Possible cause 1: heating curve set too high
Adjust the heating curve ( chapter 10.2).
Possible cause 2; error in the mains system
Check filters and valves.
13.8.3 MAXIMUM FLOW TEMPERATURE, ADDITIONAL HEAT
The CH flow has now reached its max. temperature.
Possible cause 1: heating curve set too high
Adjust the heating curve ( chapter 10.2).
Possible cause 2; error in the mains system
Check filters and valves.
13.8.4 MAXIMUM WORKING TEMPERATURE ADDITIONAL HEAT
The CH return has reached the max. permissible temperature. Possible
cause: heating curve set too high.
Possible cause 1: heating curve set too high
Adjust the heating curve ( chapter 10.2).
Possible cause 2; bivalence point set incorrectly.
Consult the installer if this occurs more than once.
13.8.5 TOO LOW FLOW TEMPERATURE OR TOO LOW FLOW
TEMPERATURE, HEATING SYSTEM 2
If the temperature of the flow falls below the set point value longer than
15 minutes, the heat pump shuts down and the warning is activated.
6 720 641 467-28.1I
15


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