Troubleshooting; 10.3.1 Eliminating Simple Faults - Bosch Control 8313 Operating Instructions For Users

10.3

Troubleshooting

10.3.1 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.
Fault, observation Effect on control characteristics Reason
Display is dark Control not working
Unsupported The module is not recognised.
module
Module not working Modules not working
xxx °C displays Operation of the control unit
continues.
Outside The control is computing with the
temperature minimum outside temperature.
sensor faulty
The room is too cold.
Domestic hot water DHW is not being heated. The
remains cold current DHW temperature is below
40 °C.
Thermal disinfection Thermal disinfection has been
failed interrupted.
Maintenance No effect on the control response
interval expired
Table 7 Troubleshooting
Control 8313 – 6720859552 (2017/03)
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 documents of the heat source!
Enter the following data for faults you cannot rectify yourself:
• Text or number of displayed fault
• Control unit type on the data plate ( Fig. 1, [8], page 5)
• Software version
• The heating system emergency stop switch
is switched off.
• The control unit is switched off.
• The control unit safety equipment has been
triggered.
• A safety device has been triggered.
• The inserted module is faulty or the software
version is outdated.
• The control unit safety device has been
triggered.
• Sensor not installed, defective or outside the
measuring range
• Module faulty
• The outside temperature sensor is incorrect,
not connected at all or is faulty.
• The central module ZM5313 or the control
unit is faulty.
• Communication with the control unit with
the address ≥ 1 has been interrupted.
• The control is in setback mode.
• The set room temperature is
too low.
• The DHW heating is running for
too long.
• The heat sources are delivering insufficient
heating energy or are shut down.
• Room temperature sensor has been
adjusted incorrectly.
• The set DHW temperature is set incorrectly. ▶ Adjust the set DHW temperature.
• The time program has been set incorrectly. ▶ Reprogram the time program.
• The DHW temperature is not rising.
• The output of the heat source is insufficient,
e.g. because other heat consumers (e.g.
heating circuits) are requesting heat during
thermal disinfection.
• The temperature sensor is incorrectly
connected or faulty.
• The cylinder primary pump is incorrectly
connected or faulty.
• The FM-MW module or the control unit is
faulty.
• The draw-off rate during the thermal
disinfection period is too high.
• The specified period before maintenance is
next due has expired.
Operating and fault displays
Remedy
▶ Switch on the heating system
emergency stop switch.
▶ Switch on the control unit.
▶ Push in the pin.
▶ Check circuit breaker.
▶ Call service.
▶ Push in the pin.
▶ Call service.
▶ Call service.
▶ Call service.
▶ Check time and time program.
▶ If required, change time and time
program.
▶ Adjust the set room temperature.
▶ Check DHW heating.
▶ Check the heat source.
▶ Call service.
▶ Check whether the DHW circuit is in
automatic mode.
▶ Call service.
▶ Select the time for thermal
disinfection so as to avoid overlapping
with additional heat requirements.
▶ Call service.
▶ Call service.
▶ Have maintenance carried out.
The automatic maintenance message
remains active until it is reset by an
approved heating contractor.
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