American Water Heater 318935-003 - Manual (Page 30)

30
STATUS LIGHT CODE TROUBLESHOOTING CHART
LED STATUS PROBLEM CORRECTIVE ACTION
0 FLASHES (LED NOT LIT) Pilot light is not lit. Not enough
power (millivolts) to keep it lit.
Follow the lighting instructions on the front of the
water heater and record any diagnostic codes.
See Diagnostic Status Light Code section.
1 FLASH (EVERY 3 SECONDS) Normal operation. No corrective action necessary.
2 FLASHES Insufficient power (millivolts) to the
gas control valve/thermostat.
1. Check all wiring connections. If problem
persists proceed to step 2.
2. Replace the thermopile. See “Replacing the
Pilot/Thermopile Assembly.”
4 FLASHES High water temperature has
activated the over heat sensor.
Replace the gas control valve/thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
5 FLASHES Water temperature sensor failure Replace the gas control valve/thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
7 FLASHES Gas Control Valve/Thermostat
failure.
Replace the gas control valve/thermostat. See
“Removing and Replacing the Gas Control Valve/
Thermostat.”
8 FLASHES This condition only appears if the
gas control/temperature knob has
been turned off and the thermopile
continued to produce electric
power. This condition can occur if
the thermopile does not cool down
as quickly as expected when the
unit is shut off. This condition
can also occur if the gas control/
temperature knob has been
turned off and the pilot continues
to operate because the pilot valve
is stuck in the open position.
Make sure that the gas control valve/thermostat
knob is set to OFF. Wait one minute. Remove
the outer door. Look through the sight glass for
a pilot flame. If a pilot flame is observed with the
gas control valve/thermostat knob set to the OFF
position, the pilot valve is stuck open. Turn the
main gas supply OFF. Replace the gas control
valve/thermostat. For instructions, see “Removing
and Replacing the Gas Control Valve/Thermostat.”
If the pilot flame is not observed when the gas
control valve/thermostat knob is set to the OFF
position, wait 10 minutes for the thermopile to cool,
then attempt to relight the pilot by following the
lighting instructions on the water heater’s label.
If this condition returns, replace the gas control
valve/thermostat. See “Removing and Replacing
the Gas Control Valve/Thermostat” for instructions.
9 FLASHES Combustion chamber temperature
sensor circuit is open or shorted
1. Check all connections. If the problem persists,
proceed to step 2.
2. Replace the temperature sensor.
(Temperature sensor replacement must be
performed by a qualified person.) If the
problem persists, proceed to step 3.
3. Replace the gas control valve/thermostat. For
instructions, see “Removing and Replacing
the Gas Control Valve/Thermostat.”
10 FLASHES LDO occurrence was detected
in the combustion chamber
(contaminants) 1. Reset the system by following these steps: 1.)
Turn the temperature adjustment knob to OFF.
2.) Unplug the thermopile plug from the gas
control valve/thermostat. 3.) Wait for about
three minutes. 4.) Plug the thermopile plug
back into the gas control valve/ thermostat.
5.) Turn the temperature adjustment knob to
PILOT and restart the water heater as directed
in this manual. If the problem persists, proceed
to step 2.
2. Follow the procedure outlined in “Cleaning the
Combustion Chamber and Flame-Trap.”
If the problem persists, proceed to step 3.
3. Shut off the gas supply to the water heater
and contact Technical Assistance. The
telephone number is listed on the cover of this
manual.