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1.5 TROUBLESHOOTING
When the boiler does not work properly, it is possibile to consult the following suggestions to detect and solve some
common problems without technical aid:
1.5.1 ERROR CODES
Rinnai products are equipped with a self-diagnostic system: in case of malfunctioning, a numerical error code appears
on the control panel’s display and starts blinking. This function will be useful to diagnose the problem and understand
what possibly caused it. It consents to avoid, where possible, the external intervention of a Rinnai authorized technician
Take note of the blinking error code before performing maintenance request.
To restore the normal functioning of the device, it is necessary to keep pressed the button
ON
OFF
for a few seconds. In
case the error remain, ask for Rinnai authorized technical assistance center.
If you smell gas
If you smell exhaust
gas
Ignition
failure
Noise
The room is not
hot enough
There is
no hot water
The dmestic hot
water is not
hot enough
1. Stop the boiler and gas immediately. Open all the windows and doors.
2. Do not try to use any appliances: you may cause an explosion.
3. Contact your gas supplier.
Periodically check the valve of the gas pipes /shut-off valve to ensure that there is no leakage.
1. Check the flue system searching for
possible obstructions,
disconnections or damages.
1. Stop the boiler immediately and contact the
Rinnai service or maintenance.
1. Is there power to the boiler?
2. Is the set temperature lower than
the current temperature?
3. Is the error code 11 shown on the
display?
4. Is there gas supply to the boiler?
1. Is the boiler well attached to the wall?
2. Is the noise from the air inlet/exha. pipe?
3. Does the noise come from hydraulic
circuit?
Suggestion
Problem
Possible cause
1. Plug into the outlet with the correct voltage.
2. Check that the set temperature on the display is
higher than the current temperature.
3. Turn off the boiler, and turn it on again.
4. Open the gas supply valve.
1. Attach the boiler in the right way.
2. Call Rinnai service to check the flue system.
3. Remove air from the pipes opening the manual
drain point.
1. Is the CH mode on?
2. Is the set temperature too low?
3. Is the reservation mode/ outgoing mode
on?
4. Is the hot domestic water being used?
5. Is the heating valve closed?
6. Is the remote control ON?
7. Is the CH return filter blocked?
8. Is there air in the pipes?
1. Press button CH on the remote control.
2. Adjust the heating temperature.
3. Adjust the period or cancel the outgoing mode.
4. Stop using domestic hot water.
5. Open the closed heating valves.
6. Connect the remote controller and adjust CH.
7. Clean the CH return filter.
8. Open the manual air drain point to remove air.
1. Is DHW mode active?
2. Is there water supply to the boiler?
3. Is water pressure too low?
4. Is the water supply valve for cold water
too opened?
1. Press the button DHW of th remote control.
2. Wait for the water supply availability.
3. If the cold water flow is lower than 2,3lit/min because
pressure is low, the boiler will not start working.
4. Open the valve.
1. Is hot water temp. set too low?
2. Is hot water used in several places?
3. Is hot water mixed too much with cold
water?
1. Adjust hot water temperature with the remote control.
2. When the hot water is used in several places at once,
the volume of the hot water decreases.
3. Adjust the amount of cold water used.