Bosch Greentherm T9800 SEO199 - Page 41

Troubleshooting
41
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
▶ Press the buttons or to adjust parameter value if
power bar level is out of range.
1)
Fig. 42 Gas adjust - L1 parameter
▶ Press the button for 3 seconds to appliance assume
value.
▶ Press the button to save the value.
Display will be back to P1 menu.
▶ Press the button to enter L1 and verify if power bar
level is at middle point, see fig. 42.
▶ Repeat the process until L1 gas adjust is correct.
▶ Press button to finish the L1 gas adjust.
▶ Press the button or until the display shows "A1".
▶ Press the button to enter A1.
Display shows A1 value.
▶ Verify if power by level is at middle point, see fig. 41.
▶ Press the buttons or to adjust parameter value if
power bar level is out of range.
2)
Fig. 43 Air adjust - A1 parameter
▶ Press the button for 3 seconds to appliance assume
value.
The value flashes as a sign of confirmation.
▶ Press the button to finish the A1 air adjust.
▶ Press the button or until the display shows "b1".
If b1 is blinking on the display,
▶ Wait until it stops.
▶ Press the button to enter b1.
Display shows the parameter value blinking during
calibration.
▶ Wait until display shows b1 value blinking as a sign of
calibration complete.
▶ Press button to finish the b1 automatic air adjust.
▶ Press the button or until the display shows E.
▶ Press the button .
Display shows P1.
Second step - Adjust the Low power (P2)
Keep hot water taps opened to adjust Low power (P2). The unit
will ramp down to low fire and the water flow should decrease
automatically.
▶ Press the buttons or to select P2 (Low Power)
menu.
▶ Press to enter P2 adjustment.
Display shows E.
▶ Press or until L2 appears.
▶ Press the button to enter L2.
Display shows L2 value.
▶ Verify if power bar level is at middle point, see fig. 41.
▶ Press the buttons or to adjust parameter value if
power bar level is out of range.
3)
▶ Press the button for 3 seconds to appliance assume
value.
The value flashes as a sign of confirmation.
▶ Press button to finish the L2 gas adjust (U1).
Parameter D2
▶ Only a qualified technician can change this parameter.
Gas and Air adjustment is complete.
1) Increasing L1 value will cause an increase in power bar level
and vice-versa.
2) Increasing A1 value will cause a decrease in power bar level
and vice-versa.
3) Increasing L2 value will cause an increase in power bar level
and vice-versa.