Bosch Singular 5200 - Page 57

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Installation Instructions
Singular Combi Boiler - BTC 439003301 B (2021/07)
Figure 89
No
No
T1: Heating Temperature
T2: Setting the heating
Temperature
Yes
Yes
Ignitor On
Ignitor O
Gas Valve ON
Burner Operation
T1 < T2
Fan Motor
Abnormal?
Flame Rod
Abnormal?
Fan RPM
stabilized ?
Heating operation
Pre-purge
PUMP ON
FAN ON
"A2" Error check
"A6" Error check
No
No
No
T3: DHW Temperature
T4: Setting the DHW
Temperature
Yes
Yes
Yes
Ignitor On
Ignitor O
Gas Valve ON
Burner Operation
T3 < T4
Fan Motor
Abnormal?
APS
Abnormal?
Flame Rod
Abnormal?
Fan RPM
stabilized ?
DHW operation
Pre-purge
PUMP ON
FAN ON
"A2" Error check
"AE" Error check
"A6" Error check