The zone displays - Status and error messages
In addition to the actual temperature values and/or function values, further information may appear in the
zone displays relating to the status of the control zone and/or control unit. These may just be information
messages or they may be error messages. All message texts are listed in the following table. In case of error
messages, a note is also issued indicating how the error can be rectified.
Display Meaning Rectification of the error in case of an error message
Regulation mode
Zone in pilot regulation
Start-up mode active
Identification active
Sensor failure Sensors defective.
In order to be able to keep operating the zones in the
regular mode, the sensors need to be exchanged
immediately; otherwise the zones in the Regulation mode
or in the pilot regulation zone will switch and continue
working with defective sensors.
Sensor reverse voltage Sensor connections are confused.
Swap over the two sensor wires + and – of the
corresponding zones.
Fuse alarm only for HRD Wiring error. The error is saved and needs to be
acknowledged.
Data error in channel data Change to the parameter level and change a value, then
acknowledge the change. The error message will then
disappear. Alternatively, enter code number 950.
Maximum temperature / upper
measuring range limit
exceeded
The actual value of the zones has exceeded the measuring
range limit or the maximum temperature (500°C). The
heating output for the corresponding zone is switch off.
The error is saved and needs to be acknowledged.
If the error comes before the error message I-, the power
unit may be defective. Please exchange.
Likewise, errors in the sensors are possible. Please
observe the actual value.
Please contact the supplier for a quick remedy.
Error message “No heating
current is measured” during
the identification phase
The controller switches off the zones and checks in cycles
whether a heating current can be measured or not.
Reason for error: Fuse failure, heater failure or the
connection cable to the heater is defective.
Temperature reduction /
Standby active
Temperature increase / Boost
active
Diagnosis function active
Automatic ramp active
Automatic ramp active, zone is
currently the slowest zone
Alarm "Current alarm when
heating system is off " active
Heating current is measured although no control is
triggered. The heating output for the corresponding zone is
switched off. Check the power unit and exchange. The
error is saved and needs to be acknowledged.
