Information/Alarms
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5.6.45 Short oper. time in heating mode (C)
Function: Compressor operation for heating is on
average shorter than 10 min per start based on a
minimum of 5 starts within 24 hours. The alarm resets
automatically at midnight.
Heat pump: All.
B Check that the heating system is correctly installed.
B Check that the installation is correctly dimensioned.
B Check that any flow adjustments are correctly
implemented.
5.6.46 Temporary error G2 heat carrier pump (C)
Function: The circulation pump has given an error signal
for less than 3 minutes.
Heat pump: All.
Not displayed in the alarm list.
5.6.47 Temporary error G3 coll. circuit pump (C)
Function: The circulation pump has given an error signal
for less than 3 minutes.
Heat pump: All.
Not displayed in the alarm list.
5.6.48 Control unit restarted (C)
Function: The control unit restarted due to insufficient
voltage.
Heat pump: All.
B Check the voltage to the heat pump and 24Vac.
5.6.49 Replace memory battery (C)
Function: The battery voltage has fallen. If the supply
voltage disappears when the battery is empty there is a
risk that the control unit will lose software, which will
require reloading.
Heat pump: All.
B Replace the battery (replacement battery CR2032).
5.6.50 Start-up attempt interrupted (C)
Function: At compressor start the temperatures and
pressure switches are checked. When one of these is not
approved by the control unit the start attempt is
cancelled. A new start attempt occurs after 20 min if a
demand arises.
B alarm is activated when the alarm has occurred more
than once during the last 120 minutes (Æ Chapter
5.6.22, page 33).
Heat pump: All.
Not displayed in the alarm list.
5.6.51 Accessory x temp. deviation (C)
Function: The measured temperature differs from the
set point value by more than the set limit (10 K) for more
than 30 minutes.
The limit is set under Accessories (Deviation).
Heat pump: E21.
B Check the settings for the accessory
(Æ Table 37, page 21).
B Check that the set point value is reasonable.
B Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
5.6.52 Hot water oper. stoppad T8 (C)
Function: During hot water production T8 heat transfer
fluid out has risen above its permitted max limit 65 °C.
Hot water production is stopped.
Heat pump: Heat pump that makes hot water.
Not displayed in the alarm list.
B Check the flows and valves.
B
Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
NOTICE: Watch out for ESD damage to the
electronics.
B Ensure that ESD damage is avoided when
replacing the battery.
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