Alarm Functions - IVT Rego 5101 Installation Manual

Information/Alarms
5.6

Alarm functions

The different error messages that can occur are
presented here, the text and category is indicated in the
heading.
A and B alarms must always be acknowledged after the
cause is rectified in order to restart the heat pump. C
alarms are automatically acknowledged.
5.6.1 Oper. error all G1 (A)
Function: Compressor and additional heat stop.
Activated when all connected circulation pumps for
heating have stopped functioning. The alarm is also
given when E11.G1 is the only circulation pump for
heating and has stopped functioning. Risk of freezing
damage. In the control unit Settings E11.G1\Alarm
(Installer level ) must be set to Oper. reply or SSM in
order for the alarm to occur.
Heat pump: E21.
B Check the function of each pump.
B Check connections.
5.6.2 Oper. error compr. and add. heat (A)
Function: No operation response from the compressor.
Additional heat is not functioning. With internal electric
additional heat, the overheat protection has tripped.
With external additional heat, thermostat E71.E1.B31
has not given a signal within 30 minutes of additional
heat operation. Risk of freezing damage.
Heat pump: E21.
B Use the relevant wiring diagram for the heat pump
and follow the operation response signal from the
control unit via connected components.
B Identify where the signal is interrupted incorrectly.
B Check additional heat and overheat protection/
thermostat.
5.6.3 Failure on sensor T1 (B)
Function: The system switches over to control based on
sensor E21.T8. T1's temperature is given with NaN (Not
a Number) in the control unit.
Heat pump: E21.
B Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
B Replace the sensor if necessary.
30
5.6.4 Failure on sensor T2 (B)
Function: The outdoor temperature is set to 0 °C, which
means that the heat pump can continue to work, but
heat production is not correct at other outdoor
temperatures. The sensor's value is indicated with NaN
in the control unit.
Heat pump: E21.
B Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
B Replace the sensor if necessary.
5.6.5 Failure on sensor T3 (B)
Function: Hot water production switches to emergency
operation mode if the heat pump is set for Emergency
operation. The sensor's value is indicated with NaN in
the control unit.
Emergency operation-description (
page 18).
Heat pump: Heat pump with T3 as local sensor.
B Check that Hot water typeis correctly set in the
control unit.
B Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
B Replace the sensor if necessary.
5.6.6 Failure on sensor T6 (B)
Function: The compressor is stopped. E21: Additional
heat permitted to start. The sensor's value is indicated
with NaN in the control unit.
Heat pump: All.
B Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
B Replace the sensor if necessary.
5.6.7 Failure on sensor T8 (B)
Failure on sensor T9 (B)
Function: The sensor's value is indicated with NaN in the
control unit.
Heat pump: All.
B Check the installation of the sensor.
B Check the connection, measure the resistance and
compare with the resistance table.
B Replace the sensor if necessary.
Chapter 4.5,
6 720 645 172 (2010/07) en