A.O. Smith 300 Series, Инструкция по эксплуатации

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FAULT AND ALERT MESSAGES
For technical support or to locate a qualified service technician in your area, call the phone number on the warranty sheet supplied
with this water heater.
Fault Messages.
Possible Causes - Check/Repair Displayed Fault/Alert Message
•
Using a manometer, ensure that gas supply pressure is
above minimum requirement listed on heater’s data plate
and does not drop more than 1.5” W.C. when unit fires.
•
Ensure wire connections to gas valve are clean and tight.
•
Ensure wire connections to flame sensor are clean and
tight.
•
Ensure wire connections to spark igniter are clean and
tight.
•
Inspect flame sensor, clean/replace as needed.
•
Inspect spark igniter, realign igniter gap as needed
•
Ensure adequate electrical ground to heater.
ADVANCED BACK
0 days 0 hr 0 min ago
Error Code: B2-70
Ignition Failure
Flame not detected. Clean flame
rod. Check gas supply.
Press the Advanced button for
more information
•
If Blocked Exhaust error occurs when blower is running,
check for restrictions in exhaust pipe, including exhaust
elbow, condensate drain, and outside termination. Also
check exhaust pipe installation (size/length) per manual.
•
If Blocked Exhaust error occurs before blower runs,
make sure pressure switch connections are clean and
tight. Check pressure switch continuity/resistance. Switch
should be closed (continuity/0 ohms). Replace switch if
open (no continuity).
•
Other possible causes: high wind conditions and excessive
negative air pressure in building.
ADVANCED BACK
0 days 0 hr 0 min ago
Error Code: A8-1201
Blocked Exhaust
Restriction in exhaust pipe.
Check exhaust pipe and
termination for blockage.
Press the Advanced button for
•
If Blocked Intake error occurs before blower runs, make
sure pressure switch connections are clean and tight.
Check pressure switch continuity/resistance. Switch
should be closed (continuity/0 ohms). Replace switch if
open (no continuity).
•
If Blocked Intake error occurs when blower is running,
check for restrictions in intake pipe, including intake air
connection, outside termination, and inlet condensate
drains (if installed).
•
Other possible causes: High wind conditions, excessive
negative air pressure in building.
ADVANCED BACK
0 days 0 hr 0 min ago
Error Code: A7-1201
Blocked Air Intake
Restriction in air intake.
Check intake pipe and
termination for blockage.
Press the Advanced button for
•
Ensure wire connections to the temperature probe are
clean and tight.
•
Using a thermometer, check the water temperature of the
heater.
•
Use a multi-meter and check for continuity between the
two red wires of the temperature probe.
•
If the two red wires are open (no continuity) and water
temperature is below 160°F, replace the temperature
probe.
•
If the water temperature exceeds 195°F, turn off electric
power and gas supply and call Tech Support for further
instructions.
ADVANCED BACK
0 days 0 hr 0 min ago
Error Code: A5- 401
High Temp Limit Exceeded
Energy Cut Off has shut off
water heater due to high tank
temperature.
Press the Advanced button for