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Problem solving
Greentherm T9800 SE 160/199 – 6 720 816 815 (2022/01)
66
C9 Barometric pressure sensor damaged. ▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit (ECU).
1)
CA Water flow above 9.2gpm. ▶ Disconnect the appliance and purge hydraulic circuit
to remove air.
1)
▶ Install water flow restrictor.
1)
▶ Check water pressure does not exceed 150psi
(section 3.2).
CE
4)
Excessive flue blockage detected during operation
due to excessive pressure on the siphon.
Appliance shuts down for safety.
▶ 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.
▶ Check if the air filter is dirty or clogged, clean or
replace it if needed.
▶ Perform gas and air tuning ( section 8.11).
1)
CF
4)
Excessive flue blockage detected during operation
due to insufficient combustion air.
Appliance shuts down for safety.
▶ 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.
▶ Check if the air filter is dirty or clogged, clean or
replace it if needed.
▶ Perform gas and air tuning ( section 8.11).
1)
E0 Electronic control unit internal error. ▶ Reset error (touch and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
1)
E1 Hot water temperature above 194 °F (90 °C).
Appliance burner cut off to prevent scalding and
reactivation after cooling down.
▶ Disconnect the appliance and purge hydraulic circuit
to remove air.
If the problem persists:
▶ Reduce setpoint temperature to minimize
temperature instabilities.
E3
4)
Flue gases temperature above 167 °F (75 °C)
(residential) / 194 °F (commercial) or 2 minutes
above 145°F (63°C).
Appliance burner cut off to prevent overheating.
▶ Descale appliance ( section 7.3).
1)
▶ 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
specification.
1)2)
Display Description Solution
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