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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)
A8 Error - Voltage Check
1. Check the input voltage of the gas valve while burner is turned off .
Multi tester range: DC
If the voltage is measured: Gas valve relay error (DC 105 – 135 V)
If the voltage is not measured: Normal
2. If the voltage is measured, replace the control board.
Figure 25
V
A8 Error - Gas Valve Check
1. If fl ame is present when there is not a call for demand, replace the gas valve.
Figure 26
A8 Error - Flame Rod Check
1. Remove fl ame rod and check condition.
2. Reassemble the fl ame rod, turn on the power supply and measure the
current.
Combustion condition
Multi tester range: µA (Normal : above 2 µA)
Connect the multi tester between the flame rod wire and the
flame rod in series and measure)
Figure 27
μA

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Bosch Singular 5200 Specifications

General IconGeneral
BrandBosch
ModelSingular 5200
CategoryBoiler
LanguageEnglish

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