Bosch Singular 5200 Service Manual

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Service Manual
Singular Combi Boiler - BTC 439002301 A (12.2021)
8.5 A6 Error (Ignition Error)
Error Description
Ignition Failure
When it is judged that fl
ame is not recognized in normal combustion condition, ignition is attempted 6 times repeatedly. Ifthe
fl ame is not recognized, ignition is not attempted again and an error is issued
Checkpoint
 Check if the main gas valve is closed.
 Check the operation condition of the gas valve (attempting to ignite)
— Wire color: White-White (DC 105 – 135 V)
 Check the assembly and operation condition of the automatic igniter
1. Check the discharge state
2. Check the input voltage part of the automatic igniter Wire color: Brown-Brown (AC 105 – 135 V)
Table 28
Figure 18
Replace the
ignition transformer
Replace the
electrode assembly
Replace the flame rod
Check the 1st gas
pressure
Replace the gas valve
Ignition miss
Check the
ignition transformer
voltage
Ignition
condition
(Check flame)
Check the
gas valve input
voltage.
Check the
gas valve coil for
disconnection
Check the
ignition transformer
operation
Check
the operation of
the gas valve
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
No
No
No
No
No
No
Replace the
control board
Replace the control board

Bosch Singular 5200 Specifications

General

Brand	Bosch
Model	Singular 5200
Category	Boiler
Language	English