Troubleshooting
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
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4. Inlet water pressure is erratic due to fluctuating supply
water pressure. For installation on a private well system
with the use of a pressure tank, the lowest pressure range
setting recommended is 30 - 45 psi (2.06 - 3.1 bar).
Consult your installer or local plumber for effective ways to
maintain constant water pressure to the appliance when on
a well system.
8.7
Noisy burner/heater during operation
Burner noises can be heard if combustion is not properly set.
This could be caused by improper gas supply conditions (gas
pressure and/or gas composition).
Two types of noise can be heard: low pitch noise/vibration
(rumbling) and high pitch noise/vibration (whistling).
8.7.1 High pitch noise
1. Verify if correct gas type is selected (see section 3.3).
2. Verify is gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within range
and the problem persists:
3. Perform the gas and air adjustment as described in
8.7.2 Low pitch noise
1. Verify if correct gas type is selected (see section 3.3).
2. Verify is gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within range
and the problem persists:
3. Perform the gas and air adjustment as described in
8.8
Error codes C1, C2, CF and/or CE
C1, C2, CF and CE errors could be caused by 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 35.
3. Reset the error by holding the On/Off button for 3s.
If there are no obstructions, and the problem persists:
4. Perform the gas and air adjustment as described in
5. 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 4.2) 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 3.3).
2. Verify is gas pressure is within specified range (see
section 3.2).
If gas type is properly selected, gas pressure is within range
and the problem persists:
3. Perform the gas and air adjustment as described in
8.10 Manifold gas pressure
DANGER:
Fatal accidents!
In operations when the appliance is operating with the front
cover removed:
▶ Do not stand in front of the appliance.
▶ Avoid breathing the combustion flue gases.
▶ Turn off the appliance and install the front cover assembly
when adjustments and measurement are complete.
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.
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.
