A.O. Smith Innovo IR 12-160, Installation, User And Service Manual

Page: 79 / 96

Code and description Cause Measure
F11
(blocking error)
Ionisation error
Ionisation measured with
a closed gas control valve
Defective gas control valve. - Make sure that there is no flame after
the gas control valve has closed.
- If there is a flame, the gas control
valve must be replaced.
F19
(blocking error)
Supply voltage error
Three unsuccessful
ignition attempts.
There is not enough or too much supply
voltage during 60 seconds.
The measured voltage between live and
neutral must be 230 V
AC
(-15%,
+10%).
The supply voltage between live and
earth must be between 110 V
AC
and
230 V
AC
(-15%, +10%)
- Make sure that the supply voltage on
the controller is correct.
- If the supply voltage is above or below
the stated tolerance and the error
persists, contact your maintenance
and service engineer.
- Install an isolating transformer.
F21
(lock out error)
Air proving switch error
Switch is not closed, while
fan runs during post purge
Damaged wiring/open circuit. See measure of error
F03
- Switch is not
closed when fan is running during pre-
purge.
S02
(blocking error)
Sensor error
Open circuit from sensor 1
of the temperature sensor
Sensor is not (correctly) connected. - Make sure that the connector is
connected to J3.
- Make sure that the wire is connected
to the sensor.
Damaged wiring and/or defective sensor. Replace the wiring and/or sensor.
S03
(blocking error)
Sensor error
Open circuit from sensor 2
of the temperature sensor
Sensor is not (correctly) connected. - Make sure that the connector is
connected to J3.
- Make sure that the wire is connected
to the sensor.
Damaged wiring and/or defective sensor. Replace the wiring and/or sensor.
S12
(blocking error)
Sensor error
Short circuit in sensor 1 of
the temperature sensor
Short circuit in the sensor circuit. Replace the wiring and/or sensor.
S13
(blocking error)
Sensor error
Short circuit in sensor 2 of
the temperature sensor
Short circuit in the sensor circuit. Replace the wiring and/or sensor.
0312266_INNOVO_UKUK_ V5.1, 2022-07-12
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