Installation / Operation Instruction Manual

65
Problem solving
RTG-L-199/160N/X1 – 6 721 827 274 (2022/06)
AA
3)
Condensing unit flue gases temperature [16] above
392 °F (200 °C) and/or flue gases temperature [15]
above 145 °F (63 °C) at the exhaust sensor [15].
Appliance regulates power to protect against
overheating.
▶ Check flue gas temperature sensor.
▶ Check water inlet temperature sensor.
▶ Descale appliance (section 7.3).
1)
AD Flue blockage detected during startup due to
insufficient combustion air. Appliance power derate
and possible reduce of comfort level.
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check air openings and exhaust opening 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, replace it
if needed.
▶ Perform gas and air tuning ( section 8.11).
1)
BB Fan calibration triggered due to missed ignitions. ▶ Check gas inlet pressure ( section 4.14).
1)
▶ Perform gas and air tuning ( section 8.11).
1)
BC Successive fan calibration with similar learned
values.
▶ Check gas inlet pressure ( section 4.14).
1)
▶ Perform gas and air tuning ( section 8.11).
1)
C1
4)
C2
4)
Excessive flue blockage detected during startup due
to insufficient combustion air.
Appliance shuts down for safety.
▶ Reset error (press 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 the air filter is dirty or clogged, clean or
replace it if needed.
▶ Check if flue length is according to specification
(section 4.6) and reset the error.
▶ Perform gas and air tuning ( section 8.11).
1)
C3 Flow sensor [14] does not detect water recirculation. ▶ Check pump and connections.
1)
▶ Check recirculation circuit for any blockage.
C5 Bypass water valve [8] disconnected or damaged. ▶ Check bypass water valve wire connections.
1)
If the problem persists:
▶ Replace the bypass water valve and/or wire
connections. After valve replacement, proceed
with bypass water valve calibration
(section 6.6).
1)
C7 Fan [2] disconnected or damaged. ▶ Check fan wire connections.
▶ Reset error (press and hold on/off button for 3
seconds)
If the problem persists:
▶ Replace the fan and/or wire connections.
1)
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