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Bosch Singular 5200 Service Manual

Bosch Singular 5200
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Service Manual
Singular Combi Boiler - BTC 439002301 A (12.2021)
7.14 Burner
Part No.
7738007256*
Function
Combustion with a mixture of gas and air.
Failure Event
Unable to initialize/sustain combustion.
Foreign substance or soot deposit on the burner surface.
Gas leakage from the burners.
Effects
Unexpected combustion.
Unstable flame condition and flame lifting.
Ignition failure.
Excess carbon monoxide emissions.
Error Code
A6
Diagnostic
Visual inspection: Excess foreign substance on the burner surface and
unstable fl ame condition during combustion.
Color/Number of Wires
N/A
Table 17
* included in heat exchanger assembly
7.15 Gas Valve
Part No.
7738007270
Function
Provide the gas for combustion.
For some reason, it shuts off the gas valve automatically and prevents
an unsafe condition due to combustion .
Failure Event
Gas leak from the valve.
Unable to open/close.
Effects
Gas leak from the unit.
The unit does not operate.
Error Code
A6, A8
Diagnostic
Visual inspection: Disconnection or breakage of wires.
Check range of voltage shown below.
Color/Number of Wires
White-White: DC 120 V
Table 18
7.16 Touch Pad
Part No.
7738007238
Function
Turn the boiler on or off , adjust the water temperature, and change the
modes.
Failure Event
Malfunction of Touch Pad
Effects
No operation of unit.
Error Code
EE
Diagnostic
Visual inspection: Connection or breakage of wires.
Voltage check: Check range of voltage shown below.
Color/Number of Wires
Yellow-Yellow: DC 24 V
Table 19

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Bosch Singular 5200 Specifications

General IconGeneral
BrandBosch
ModelSingular 5200
CategoryBoiler
LanguageEnglish

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