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Troubleshooting
59
Greentherm T9800 SE 160/199 – 6 720 816 815 (2022/01)
3. Ensure that the venting used is according to specifications
(see section 4.6) and cross contamination does not exist.
Ensure that intake and exhaust terminations maintain
required clearances.
If gas type is properly selected, gas pressure is within
range, the venting is according to specifications, and the
problem persists:
4. Perform the gas and air adjustment as described in
section 8.11.
8.7.2 Low pitch noise
1. Verify if correct gas type is selected (see section 6.8).
2. Verify is gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within
range, the venting is according to specifications, and the
problem persists:
3. Perform the gas and air adjustment as described in
section 8.11.
8.8 Error codes C1, C2, CF and/or CE
C1, C2, CF and CE errors could be caused by a too long flue
and/or an obstruction in the venting.
1. Verify if there are any venting obstructions and remove
them if that is the case.
2. Clean or replace the air filter, see chapter 7.1, page 55.
3. Ensure that the venting used is according to specifications
(see section 4.6).
4. Reset the error by holding the On/Off button for 3s.
If there are no obstructions and venting is according to
specifications, and the problem persists:
5. Perform the gas and air adjustment as described in
section 8.11.
6. If it is not possible to solve the problem with these
measures and error persists, the burner surface (ceramat)
might be obstructed (e.g. clogging due to dust/particles in
the air). Contact Bosch support line for further assistance
into the diagnosis if your installation fits this description; in
case of confirmation, replace the burner and revise
installation conditions ( section 4.3) to avoid
reoccurrence.
8.9 Error codes EA and/or EC
EA and EC errors can appear if combustion is not properly set.
This could be caused by improper gas supply conditions (gas
pressure and/or gas composition).
1. Verify if correct gas type is selected (see section 6.8).
2. Verify is gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within
range, the venting is according to specifications, and the
problem persists:
3. Perform the gas and air adjustment as described in
section 8.11.
8.10 Manifold gas pressure
The manifold gas pressure measurement is only carried out if it
is necessary to confirm the value from the rating plate. In case
of a high deviation between measured and stated values,
please proceed with Gas/air adjustment (see section 8.11).
1)
▶ Turn Off the appliance.
▶ Remove the front cover of the appliance (see page 12).
Fig. 52 Pressure head points
[A] Air pressure head in the box
[B] Gas pressure head in the burner
[C] Tee (installer supplied)
▶ Loosen the set screw of the pressure head point [B].
▶ Connect the pressure gauge connection "+" to the test
point [B].
1) Manifold gas pressure from the rating plate is valid for sea
level operation with standard gas pressure and
composition. If operating conditions are different from
those, values from section 8.11 should prevail over
manifold gas pressure to assure a correct appliance tuning.
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