Operating and fault displays
27
Control 8311/8313 – 6720859790 (2020/02)
9.2 Faults
9.2.1 Eliminating simple faults
The fault displays depend on the modules used.
Faults caused by the control unit, are automatically deleted once the fault
has been rectified.
Faults caused by the burner control unit of the heat source must be reset
at the control or the heat source, depending on the type of fault:
▶ Observe the technical documentation for the heat source!
Give the following data for those faults, which you can not rectify
yourself:
• Text or number of displayed fault
• Control unit type on the data plate ( Fig. 1, [11], page 6)
• Make note of the software version of the operating system and user
interface.
▶Tap .
Display text/Observation/
Fault
Effect on the control characteristics Cause Remedy
Display is dark Control not working • The heating system emergency
stop switch is off.
▶ Switch on the heating system
emergency stop switch.
• The control unit is switched off. ▶ Switch on control unit.
• The control unit safety equipment
has been triggered.
▶ Push in the pin Chapter 3.11,
page 15.
When triggered several times:
▶Phone Service.
• A safety device has been triggered. ▶ Check circuit breaker.
Unsupported module The module is not recognised. • The inserted module is faulty or the
software version is outdated.
▶Phone Service.
Module not working Modules not working • The control unit safety equipment
has been triggered.
▶ Push in the pin.
▶Phone Service.
xxx °C Operation of the control unit
continues.
• Sensor not installed, faulty or
outside the measuring range.
• Module faulty
▶Phone Service.
Outside temperature sensor
defective
The control is computing with the
minimum outside temperature.
• The outside temperature sensor is
not connected, incorrectly
connected or is faulty.
▶Phone Service.
Manual operation of boiler
actuator
The burner is in manual mode. • Manual operation activated ▶ Deactivate manual operation.
Hours run since last
maintenance exceeded!
No effect on the control
characteristics.
• The set elapsed time has elapsed. ▶ Have maintenance carried out.
▶ Have service display reset.
▶Phone Service.
Maintenance interval expired No effect on the control
characteristics.
• The specified period before
maintenance is next due has
expired.
▶ Have maintenance carried out.
The automatic Service display
remains active until it is reset by an
approved heating contractor.
▶Phone Service.
Burner starts exceeded No effect on the control
characteristics.
• The set burner starts have expired. ▶ Have maintenance carried out.
▶ Have service display reset.
▶Phone Service.
The room is too cold – • The control is in setback mode. ▶ Check time and time program.
▶ Change the time and time program
if required.
• The set room temperature is too
low.
▶ Adjust the set room temperature.
• The DHW heating is running for too
long.
▶ Check DHW heating.
• Heat sources are delivering
insufficient thermal energy or are
shut down.
▶ Check the heat source.
• Room temperature sensor has
been adjusted incorrectly.
▶Phone Service.
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