Faults; Eliminating Simple Faults - Bosch Control 8311 Operating Instructions Manual

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!
Display text/Observation/
Fault
Display is dark
Unsupported module
Module not working
xxx °C
Outside temperature sensor
defective
Manual operation of boiler
actuator
Hours run since last
maintenance exceeded!
Maintenance interval expired No effect on the control
Burner starts exceeded
The room is too cold
Control 8311/8313 – 6720859790 (2020/02)
Effect on the control characteristics Cause
Control not working
The module is not recognised.
Modules not working
Operation of the control unit
continues.
The control is computing with the
minimum outside temperature.
The burner is in manual mode.
No effect on the control
characteristics.
characteristics.
No effect on the control
characteristics.
–
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 .
• The heating system emergency
stop switch is off.
• The control unit is switched off.
• The control unit safety equipment
has been triggered.
• A safety device has been triggered. ▶ Check circuit breaker.
• The inserted module is faulty or the
software version is outdated.
• The control unit safety equipment
has been triggered.
• Sensor not installed, faulty or
outside the measuring range.
• Module faulty
• The outside temperature sensor is
not connected, incorrectly
connected or is faulty.
• Manual operation activated
• The set elapsed time has elapsed. ▶ Have maintenance carried out.
• The specified period before
maintenance is next due has
expired.
• The set burner starts have expired. ▶ Have maintenance carried out.
• The control is in setback mode.
• The set room temperature is too
low.
• The DHW heating is running for too
long.
• Heat sources are delivering
insufficient thermal energy or are
shut down.
• Room temperature sensor has
been adjusted incorrectly.
Operating and fault displays
Remedy
▶ Switch on the heating system
emergency stop switch.
▶ Switch on control unit.
▶ Push in the pin  Chapter 3.11,
page 15.
When triggered several times:
▶ Phone Service.
▶ Phone Service.
▶ Push in the pin.
▶ Phone Service.
▶ Phone Service.
▶ Phone Service.
▶ Deactivate manual operation.
▶ Have service display reset.
▶ Phone Service.
▶ Have maintenance carried out.
The automatic Service display
remains active until it is reset by an
approved heating contractor.
▶ Phone Service.
▶ Have service display reset.
▶ Phone Service.
▶ Check time and time program.
▶ Change the time and time program
if required.
▶ Adjust the set room temperature.
▶ Check DHW heating.
▶ Check the heat source.
▶ Phone Service.
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