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14 Rinnai Corporation EX17C / EX22C Manual
Troubleshooting
Restart Function
If there is a power failure while the appliance is on, then the appliance will start automatically when the power is
restored.
If the appliance fails to ignite, the appliance will attempt ignition after 1 hour. The “Ignition Failure” fault code, 11,
will appear during that hour and disappears after a successful ignition. If ignition fails again, then the fault code
will remain and another attempt to ignite will occur in 1 hour. The fault code is not stored in the fault code history.
If the flame is extinguished during forced combustion then the appliance will attempt ignition after 1 hour. The
“Ignition Failure” fault code, 11, will appear during that hour and disappears after a successful ignition. Forced
combustion takes place for about 15 seconds before ignition. After this time, the temperature control logic
controls the combustion.
If the flame is extinguished (burner combustion failure) while the temperature control logic is operating the
appliance, then the appliance will immediately attempt ignition. No fault code will appear.
Problem
Remedy
Cause
Not Plugged In
Power Failure
(Initial Installation)
Air In Gas Pipe
Gas Filter Blocked
Miss Ignition
Flue terminal obstructed
Flue manifold not connected
Louver obstructed
Air filter blocked
Gas Escape
Child Lock Set
Gas turned off at meter, tank,
or valve.
Plug In
Push On/Off button to attempt
restart after power is restored.
Purge air
(Installer)
Service Call
Service Call
Clear obstruction
Service Call
Clear obstruction
Clean filter
Service Call
Cancel Child Lock
Turn gas on
No ON indicator
Burner doesn’t ignite
Unusual combustion
Combustion stops
during operation
Smell of gas
Noisy ignition
Takes too long to
warm the room
ON Timer is set
Cancel “ON” Timer or push
override button