American Water Heater 300 Series Instruction Manual page 60

FAULT AND ALERT MESSAGES (CONT)
Call the technical support phone number listed on the back cover for further technical assistance or to locate a qualified service technician
in your area.
Possible Causes - Check/Repair
• 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.
• 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.
• Confirm the water heater is full of water.
• Confirm the powered anode wire connections are tight and free of
debris or moisture (i.e. rust, solder, metal pipe shavings).
• Confirm proper electrical ground to the water heater.
• Inspect powered anode, clean/replace as needed.
NOTE: This Fault only applies to models with powered (non-
sacrificial) anodes.
• Confirm the anode rod is not bent and shorting to the tank.
• Confirm the powered anode is free of contamination between the
anode top and surrounding metal (i.e. solder, loctite, WD40).
• Confirm proper electrical ground to the water heater.
• Inspect powered anode, clean/replace as needed.
NOTE: This Fault only applies to models with powered (non-
sacrificial) anodes.
Displayed Fault/Alert Message
Blocked Air Intake
0 days 0 hrs 0 mins ago
Error Code: A7-1201
Restriction in air intake.
Check intake pipe and
termination for blockage.
Press the Advanced button for
High Temp Limit Exceeded
0 days 0 hrs 0 mins ago
Error Code: A5 - 401
Energy Cut Off has shut off
water heater due to high tank
temperature.
Press the Advanced button for
No Water
0 days 0 hrs 0 mins ago
Error Code: D6 -8
No water detected by Powered
Anode.
The control indicates a problem
with the anode protection. By
ACCEPT
Anode Shorted
0 days 0 hrs 0 mins ago
Error Code: CC -B
The Powered Anode is shorted to
earth ground or the tank.
The control indicates a problem
with the anode
60
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