Troubleshooting
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
40
▶ Open hot water taps when the display shows Tap Symbol
image (1 tub and 2 sinks should be sufficient; when there is
enough water flow the image disappears).
Fig. 39 Combustion Auto Adjust - Open Taps
The Combustion Auto Adjust process takes several minutes.
Steps from 1 to 7 will appear on the display.
▶ Do not interfere with the appliance during the auto
adjustment process.
▶ Wait until display shows dn blinking as a sign of calibration
complete.
▶ Touch the symbol to exit UC menu.
Gas and Air auto adjustment is complete.
In case of failure in the auto calibration process the error sign
appears.
Verify if:
▶ Appears any error codes on the display, see table 20.
▶ Gas type and pressure are correct.
▶ Wind conditions are stable (e.g. wind gusts may be a cause
of failure).
▶ Hot water flow is sufficient and stable (e.g. water from a
well is a potential source of water instability).
In case of positive results for all these actions:
▶ Exit UC menu and repeat the process.
If failure persists:
▶ Perform manual adjustment according to chapter 8.11.2
or contact Bosch support line for further assistance.
8.11.2 Manual adjust Gas/Air flow
Gas/Air flow adjust is also possible to perform manually (only
recommendable if automatic adjust is not possible to conclude
successfully).
First step - Adjust the maximum power (P1)
▶ Press the button to turn ON.
▶ Press and hold simultaneously buttons , and
for 3 seconds, until display reads P4.
Fig. 40
▶ Press the buttons or to select P1 (Maximum
Power) menu.
▶ Open hot water taps when the display shows Tap Symbol
image (1 tub and 2 sinks should be sufficient; when there is
enough water flow the image disappears).
▶ Press to enter P1 adjustment.
Display shows E.
▶ Press or until L1 appears.
▶ Press the button to enter L1.
Display shows L1 value.
▶ Verify if power bar level is at middle point, see fig. 41.
Fig. 41 Power bar middle point
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