Bosch Greentherm T9800 SEC 199 Installation And Operating Instructions Manual page 62

62 | Problem solving
Display Description
CE Flue blockage detected during operation due to
excessive pressure on the siphon.
CF Flue blockage detected during operation due to
insufficient combustion air.
E0 Electronic control unit internal error.
E1 Hot water temperature above 194 °F.
Appliance burner cut off to prevent scalding and
reactivation after cooling down.
E3 Flue gases temperature above 167 °F (residential)
/ 194 °F (commercial) or 2 minutes above 145 °F.
Appliance burner cut off to prevent overheating.
E4 Air temperature inside cabinet above 176 °F or 2
minutes above 158 °F.
Appliance burner cut off to prevent overheating.
E5 Condensing unit flue gases temperature above
428 °F or 2 minutes above 392 °F.
Appliance burner cut off to prevent overheating.
Table 27
6 720 816 815 (2018/08)
Solution
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Check exhaust pipes and terminals for obstructions
and reset the error.
▶ Check if flue length is according to specification
(section 4.6) and reset the error.
▶ Perform gas and air tuning ( section 8.11).
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Check air intake and exhaust pipes and terminals for
obstructions and reset the error.
▶ Check if flue length is according to specification
(section 4.6) and reset the error.
▶ 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.
▶ Disconnect the appliance and purge hydraulic
circuit to remove air.
If the problem persists:
▶ Reduce setpoint temperature to minimize
temperature instabilities.
▶ Descale appliance ( section 7.3).
▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [15] (section 11) and
replace the sensor if it is not according to
1)2)
specification.
▶ Check for flue gas leakage inside the cabinet or
1)
concentric vent.
▶ Reset error (touch 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 (touch 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.
Greentherm T9800 SE 160/199 | SEC 199
1)
1)
1)
1)
1)