A.O. Smith ATI-140H-N, Руководство по обслуживанию

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18 • Condensing Models: On-Demand Water Heater Service Handbook
TR
OUBLE
SHOO
TING
burners will become gas rich and
trigger the 101 or 991 code.
◦
To check and clean the
burner, refer to “Cleaning the
Combustion Components”
on page 29.
◦
To check and clean the
fan, see “Cleaning the
Combustion Components,”
page 29.
IMPORTANT: Do not proceed
to the next step until this
one has been completed and
these causes have been ruled
out. Lack of combustion air
will affect manifold pressure
readings.
6. Contact Technical Support
regarding the manifold pressure.
(See “Checking and Adjusting
the Manifold Gas Pressure,”
page 25). With approval from
Technical Support, adjust the
manifold pressure to the correct
values, if necessary.
7. Complete the following procedure
to reset the 101/991 error code:
7.1 Make sure that the water
heater is powered on.
7.2 Press the on/o ff bu on on
the remote/temperature
controller so the amber
standby light is o
ff .
7.3 On the computer board,
simultaneously press and
hold the INCREASE and
DECREASE bu ons for
fi ve
seconds. They are the two
lower bu ons (Figure 8,
page 18).
7.4 Release the bu ons when
the green LED on the control
board turns o
ff (Figure 8,
page 18). It will turn back
on.
7.5 Shuto ff power to the heater
using the on/o ff switch
above the computer board.
7.6 A er 5 seconds, turn the
power on. The heater will
be in standby and ready for
opera on.
8. Contact the technical service
department for further assistance
if nothing has worked so far. The
manifold gas pressure may need to
be adjusted.
9. If you are sure that the problem
has been resolved, clear the error
code as follows:
9.1 Turn o ff the power to the
heater using the switch
above the computer board.
9.2 Turn on power to the heater
and proceed to the next
steps.
9.3 Simultaneously press and
hold the INCREASE and
DECREASE bu ons on the
computer board. They are
the two lower bu ons. See
Figure 8.
9.4 Release the bu ons when
the green LED turns o
ff
(Figure 8). It will turn back
on.
9.5 Shuto ff power to the heater
using the on/o ff switch
above the computer board.
9.6 A er 5 seconds, turn the
power on. The heater will
be in standby and ready
for opera on. If the unit
includes a remote controller,
press its on/o
ff bu on to
turn the power on.
Green LED
Decr ĞĂƐĞƵƩŽŶ
Incr ĞĂƐĞƵƩŽŶ
D/EƵƩŽŶ
DyƵƩŽŶ
Figure 8.