Electrode; Flame Rod; Ignition Transformer & Wire - Bosch Singular 4000 Service Manual

Service Manual

7.11 Electrode

Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color/Number of Wires
Ignitor Gap Distance
Table 14

7.12 Flame Rod

Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color/Number of Wires
Table 15
7.13 Ignition Transformer & Wire
Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color/Number of Wires
Input Voltage
Output Voltage
Table 16
1 6 |
7738007260
To ignite the gas, discharge the spark to the main burner repeatedly until
igniting the gas.
Unable to ignite during the ignition process.
 The unit cannot ignite during the ignition process and "A6" error code
will be shown on the display panel.
 No effects on the unit, however, the durability of the spark plug are
down.
A6
Visual inspection: Connection or breakage of wires.
N/A
4.0 – 4.8 mm (0.16" – 0.19")
7738007259
Detect the normal fl ame during the combustion.
 Fail to detect a flame in spite of the combustion process.
 Improper gap
The boiler is not operated.
A6, A8
 Visual inspection: Connection or breakage of wires, check the flame
rod gap.
 Check range of voltage shown below.
White-Ground : AC 24 V
7738007252
To ignite the gas, discharge the high voltage spark to the main burner.
Unable to ignite during the ignition process.
The unit cannot ignite during the ignition process and "A6" error code will
be shown on the display panel.
A6
 Visual inspection: Connection or breakage of wires.
 Check range of voltage shown below.
Brown-Brown: AC 120 V
120 V, 60 Hz
18 kV
Singular Combi Boiler - BTC 439002301 A (12.2021)