Danfoss Icon Series, Installation Manual, Page: 8 / 102

8 | © Danfoss | FEC | 2020.03
AN29434614196101-000401 | 088N2112 00
Installation Guide Danfoss Icon™ Master Controller 24V
Trouble shooting
If an error is detected, an alarm code will be displayed either on the Danfoss Icon™ Master Controller 24V or on
the thermostat.
Alarm
code
Problem Solution
Er03 You have set-up a cooling application
that requires a reference room ther-
mostat to be appointed.
Please go to the thermostat in the desired reference room
and enter the thermostat installer menu. Set thermostat
to ON in ME.6 ”reference room thermostat”.
Er05 Communication lost to Radio Module. Please check that the cable is properly connected in the
Radio Module and Danfoss Icon™ Master Controller 24V.
Er06 Communication lost to room thermostat. Identify the room thermostat by looking at the flashing
outputs on the Danfoss Icon™ Master Controller 24V, or look
at the thermostats. Wake up thermostat, then press on
the thermostat. Failing thermostat will say “NET ERR”.
In some cases it is necessary to add a repeater to estab-
lish a better wireless communication between the Master
Controller and Thermostat.
Replace batteries on room thermostat and perform a
network test (activate NET TEST in menu ME.3 on room
thermostat).
Er07 Communication lost to Slave Controller. If wireless, check Radio Module connection to Danfoss
Icon™ Master Controller 24V. If wired system, check the
wire connecting the controllers.
Er08 Communication lost from Slave to
Master Controller.
If wireless, check Radio Module connection to Danfoss
Icon™ Master Controller 24V. If wired system, check the
wire connecting the controllers.
Er10 Communication lost to Repeater. Check that the repeater is plugged into outlet / has not
been removed and outlet is ON .
Er11 Communication lost to Expansion
Module.
Check that Expansion Module is slidded fully into place.
Note! The Master controller must be turn off and on again in
order to register the expansion module.
Er12 Actuator defective.
The defective actuator output is flashing.
Replace actuator.
Er14 A Danfoss Icon™ Master Controller can-
not be included as (become) a Slave
Controller because one or more room
thermostats, repeaters or Danfoss
Icon™ Master Controller 24V have al-
ready been included.
This Danfoss Icon™ Master Controller 24V has to be fac-
tory reset to become a Slave Controller. (See description
in chapter ”Reset or replace a Danfoss Icon™ Master Con-
troller).
Er16 This application requires a specific ac-
tuator output to be available.
You have already assigned this output to a room ther-
mostat, or the output has not yet had an actuator fitted.
Please uninstall RT from TWA, it must be available to the
application chosen (or fit actuator - if this was not yet done).
Er17 External PT1000 sensor not fitted, or
defective.
Check sensor and replace if necessary
Note! Remember to ensure that the Master Controller is con-
nected due to risk of electric shock.
Hydraulic balance
When using the Danfoss Icon™ Master Controller 24V with PWM+ regulation, the system will automatically
balance the circuits.
In heating systems with extreme differences in circuit lengths, the automatic balancing might not be adequate.
In these cases the Danfoss Icon™ Master Controller 24V can help you determine which circuits that are strug-
gling to get enough flow:
1. Press to select RUN mode.
2. Press an button to see the average duty cycle in percentage for the selected circuit (pic. 13).
When pressing the output button the average duty cycle is shown in the display of the Danfoss Icon™ Master
Controller 24V.
The duty cycle is shown as the amount of time in % that the actuator is open during active heating periods and
only when in heating mode as an average over time.
This feature can help determine if one or more rooms have difficulty receiving enough flow or effect to reach
optimal comfort.
The room with the highest duty cycles is the one that calls for the highest flow. If this room has problems reach-
ing the desired room setpoint temperature, the following steps can help give this room more flow/heating
capacity:
1. Increase the flow for the room with the highest duty cycle, using the pre-setting valve on the manifold -> set
to maximum flow on pre-setting valves for this room’s outputs.
2. If the room with the highest duty cycle is already at maximum flow, instead reduce the flow for the outputs
that show the lowest duty cycle (these do not need as much flow).
3. If none of the above is enough to reach the desired room temperature, increase the total flow, by setting a
higher flow on the circulation pump.
4. As a last resort increase the supply temperature into the system.
Note! By installing an Expansion Module in the Danfoss Icon™ Master Controller 24V the system will be able to auto-
matically adjust the supply temperature according to heat demand in the rooms.
Updating Firmware on Danfoss Icon™ 24V Master Controller
When a new firmware version becomes available for the Danfoss Icon™ 24V Master Controller a notification will
be shown on the Danfoss Icon™ App if you are using a Danfoss Icon™ App Module. In case you are accessing the
Danfoss Icon™ system via a Zigbee module the notification will be shown on a 3rd party app.
When accepting the firmware update on the app the new firmware will be downloaded to the App or Zigbee
module. Once downloaded the update will be initiated and the display on the Master Controller will show
update and a counter will follow to show progress. Once the update has completed the Master Controller will
return to Run mode.
In installations with multiple Master Controllers (Slaves) the App will have to be attached directly to each Mas-
ter Controller in the system (pic. 18.1-18.3) in order to update.