Bosch Greentherm T9800 SEC 199 Installation And Operating Instructions Manual page 63

Display Description
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.
F7 Electronic control unit internal error.
F8 Electronic control unit internal error.
F9 Gas valve driver internal fault.
FA Gas leakage in the gas path (gas valve or gas
manifold shut-off valves).
Table 27
Greentherm T9800 SE 160/199 | SEC 199
Solution
▶ Reset error (touch 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 (touch 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 6.8).
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
▶ Check gas valve wire connections.
If the problem persists:
▶ Replace the wire connections and/or electronic
1)
control unit.
▶ Replace the gas valve and/or gas manifold.
▶ After gas valve and/or gas manifold replacement
perform gas and air tuning ( section 8.11).
Problem solving | 63
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