Installation / Operation Instruction Manual

55
Problem solving
RTG-K-199/160N/X2 – 6 720 813 642 (2022/06)
Table 25
Note: If the appliance is locked for safety reasons, information is shown on the display to give more information on the problem.
Once the problem is solved, you may have to reset the error (press and hold button for 3 seconds). To restart the appliance,
inside the appliance or in the remote control.
F9 Gas valve driver internal fault. ▶ Check gas valve wire connections.
1)
If the problem persists:
▶ Replace the wire connections and/or electronic
control unit.
1)
FA Gas leakage in the gas path (gas valve or gas
manifold shut-off valves).
▶ Replace the gas valve and/or gas manifold.
1)
▶ After gas valve and/or gas manifold replacement
perform gas and air tuning ( section 8.11).
1)
Display shows
but without existence
of solar thermal
system.
Power demand lower than appliance minimum
output power.
▶ Increase hot water flow.
▶ Increase setpoint temperature.
Display shows
and water
temperature low.
High pitch noise
(whistling)
Combustion flame with gas in excess or lack of air.
(Combustion adjustment is rich).
▶ Check if gas type is correct ( section 3.3).
1)
▶ Check gas inlet pressure ( section 4.17).
1)
▶ Perform gas and air tuning ( section 8.11).
1)
Low pitch noise with
vibration (rumbling)
Combustion flame with air in excess or lack of gas.
(Combustion adjustment is lean).
▶ Check if gas type is correct ( section 3.3).
1)
▶ Check gas inlet pressure ( section 4.17).
1)
▶ Perform gas and air tuning ( section 8.11).
1)
1) only to be carried out by qualified contractors.
2) see temperature resistance charts in fig. 53 and 54.
3) Reset error by closing and opening all water tap, no restriction.
4) Reset error by closing and opening all hot water faucet, limited to 3 times per hour. It can take up to 3 minutes to check for
blockage and the appliance to perform the automatic air tuning.
Display Description Solution