A.O. Smith Innovo 12-160, Инструкция по установке, обслуживанию и техническому обслуживанию

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Code and description Cause Measure
F03
(lock out error)
Air proving switch error
Switch is not closed when
fan is running during pre-
purge.
Hoses are damaged. Make sure that the hoses, between the
air proving switch and fan and the air
proving switch and gas control valve are
not damaged and reset the controller.
If necessary replace the hose(s)
When the hose(s) are replaced and
reconnected, reset the controller. •
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Wiring is damaged. Make sure that the wiring, between the
air proving switch and the control, is
connected and not damaged.
If necessary, replace the wires or
reconnect the wires.
When wires are replaced or reconnected,
reset the controller. •
•
•
Leakage of air between venturi and
flexible air connector. Make sure that the flexible air connector
is not damaged. If necessary, replace the
flexible air connector.
Make sure that the hose is properly
connected to the venturi. If necessary,
tighten the clamp. •
•
Non return valve, between fan and
burner, is stuck. Make sure that the non return valve can
move freely. If necessary replace the non
return valve.
Not enough pressure differential across
the air proving switch, due to:
venting system
malfunctioning condensation
discharge
dirty burner
blocked heat exchanger •
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•
•
Check, after each fix, if the error reappears.
If the error reappears continue in finding the
cause.
Measure the pressure differential across
the air proving switch, refer to Air
pressure differential (see section 8.9.2).
Venting system (see section 8.7):
Make sure if the venting system is
compliant.
Make sure that the venting system has
no blockages.
Make sure if the air inlet screen has no
blockages.
Condensation discharge:
Make sure the condensate drain has no
blockages.
Make sure that the condensate drain is
connected to the waste water discharge
by an open connection.
Burner:
Make sure that the the burner is clean
(see section 11.4.1).
Measure the pressure differential across
the air proving switch again. If the
pressure differential is insufficient, clean
the heat exchanger.
Make sure that the air proving switch is
closing, by using a multimeter.
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76 Installation, Maintenance and Service part