Bosch Greentherm T9800 SEO199 Installation And Operating Instructions Manual page 47

Display Description
E4 Air temperature inside cabinet above 176 °F
(80 °C) or 2 minutes above 158 °F (70 °C).
Appliance burner cut off to prevent overheating.
E5 Condensing unit flue gases temperature above
428 °F (220 °C) or 2 minutes above 392 °F
(200 °C).
Appliance burner cut off to prevent overheating.
E7 Electronic control unit internal error.
E8 Error during ionization test. Electronic control unit
internal error.
E9 Thermal fuse [13] broken.
EA Ignition failure.
EB Electronic control unit internal error.
EC Flame lost during operation.
EE Gas valve modulation solenoid [7] disconnected.
EF Wrong gas connected (LP instead of NG) for
current appliance configuration.
F2 Electronic control unit internal error.
F3 Electronic control unit internal error.
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
Solution
▶ Check for flue gas leakage inside the cabinet
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [18] (section 11) and
replace the sensor if it is not according to
1) 2)
specification.
▶ Descale appliance ( section 7.3).
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [16] (section 11) and
replace the sensor if it is not according to
1) 2)
specification.
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Replace electronic control unit.
1)
▶ Replace thermal fuse.
▶ Check gas inlet pressure ( section 4.13).
▶ Perform gas and air tuning ( section 8.11).
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Check gas inlet pressure ( section 4.13).
▶ Perform gas and air tuning ( section 8.11).
▶ Check gas valve wire connection.
If the problem persists:
▶ Replace the gas valve and/or wire connections and/
or electronic control unit. For gas valve replacement
perform gas and air tuning ( section 8.11).
▶ Check gas type ( section 6.7).
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
Problem solving
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