64
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Expert mode
While the screed drying program is active, information will
appear on the main screen of the respective heating circuit.
After the program has ended, the following operating status
is activated: “Frost protection”
The following text is shown on the main screen: “Screed
drying program completed”
27.7.4 Fault
Fault
Description
Flow temperature 5 K higher
than the set target value.
The heat pump interrupts the
screed drying program and au-
tomatically starts it again once
the cool-down conditions have
been met.
27.8 Relay test
For testing purposes, it is often helpful to control individual
actuators independently of the other software algorithms.
The OTS offers this option via the “Relay test”, which can
be found in each submenu (e.g. heating circuit heater).
The OTS “Relay test” switches on the relevant output for
2 minutes. This makes it easy to detect wiring faults.
Material damage
If outputs are activated via the relay test, then no
protective functions are active in the controller. The
outputs are not switched off via the controller, even
when the target values have been reached.
»
Perform the relay test only for testing or com-
missioning purposes.
27.8.1 Performing a relay test
»
Open the menu.
»
Select the actuator for which you want to perform a
relay test.
»
Select “Relay test”.
»
Perform the relay test.
»
Perform a device reset.
Relay test, heating circuit
Description
Unit
Relay test, heat-
ing circuit
The status for the relay test can be set
here.
-
Inactive
The relay test is not active. Control takes
place automatically.
Off
All actuators are switched off.
Mixing valve
opening
The heating circuit mixing valve is being
opened.
Description
Unit
Heating cir-
cuit pump
The heating circulation pump is activat-
ed.
Mixing valve
closing
The heating circuit mixing valve is being
closed.
Actuation level,
relay test, heating
circuit
An output variable can be defined here
for the actuators activated via the relay
test.
%
0
Off
1-100
Activation in %
Relay test, heat pump
Description
Unit
Relay test, heat
pump
The status for the relay test can be set
here
-
Inactive
The relay test is not active. Control takes
place automatically.
Off
All actuators are switched off.
Heat genera-
tor pump
The heat generator pump is activated.
DHW 3-way
switching
module
The 3-way switching module for DHW is
activated.
Actuation level,
relay test, heat
pump
An output variable can be defined here
for the actuators activated via the relay
test.
%
0
Off
1-100
Activation in %
Relay test, DHW
Description
Unit
Relay test, DHW
The status for the relay test can be set
here.
-
Inactive
The relay test is not active. Control takes
place automatically.
Off
All actuators are switched off.
DHW circula-
tion pump
The DHW circulation pump is actuated.
Actuation level,
relay test, DHW
An output variable can be defined here
for the actuators activated via the relay
test.
%
0
Off
1-100
Activation in %
27.9 Fault history
The fault history can be called up in expert mode.
»
Open the menu.
»
Select “Alarms”
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