John Wood Atmospheric Gas (ENERGY STAR) - NEW - Manuel (Page 30)

30
STATUS LIGHT TROUBLESHOOTING FLOWCHART
Status Light Code
LED FLASH
SEQUENCE
CONTROL STATUS CORRECTIVE ACTION
Short flash once every four second IDLE (No call for heat, no fault conditions)
“Heartbeat”, alternates bright/dim Call for Heat (No fault conditions)
One Flash, three second pause Low Flame Signal (control continues to
operate)
Turn the power switch on the gas control valve to the “OFF” position and unplug the power cord from the
power outlet.
1. Check the incoming gas line pressure to ensure adequate supply to the water heater. If incoming
gas supply pressure is adequate proceed to step 2.
2. Check all wiring connections and insure all harness and wires connections are seated firmly and
provide proper electrical contact. If no connection problems are found proceed to step 3. Firmly
seat any loose connections found. If any connections are found to be damaged consult the
replacement parts list for the appropriate replacement. After any connection problems are fixed
restart the water heater by following the lighting instructions on page 18. If the problem persists
proceed to step 3.
3. Check condition of the base ring filter and flame arrestor. If they are clogged follow the instructions
for cleaning on pages 25-26. If parts are not clogged proceed to step 4. After cleaning follow
instructions for lighting on page 18. If problem persists proceed to step 4.
4. Follow the instructions on page 24 to remove the burner assembly. Once the burner assembly has
been removed inspect the manifold tube and burner, see figure 29, for any obstructions. If any
clogs or obstructions are present clear them. Inspect the electrode/flame sense rod, see figure 32,
for corrosion buildup, degradation, or damage. If there is evidence of any damage to the electrode/
flame sense rod replace the igniter/pilot assembly. Follow the directions on page 26 to re-install the
burner assembly into the combustion chamber. Follow the instructions for lighting on page 18. If the
problem persists contact a certified service representative.
Two Flash, three second pause End Switch Failed Closed Look at the top of water heater to see if the damper is open, see figure 12. If the damper is open insure
there is no obstruction that would prevent the damper from closing. If there are any obstructions turn
the power switch on the gas valve to the “OFF” position, remove the obstruction, if the damper closes
turn the power switch on the gas valve to the “ON” position. If there are no obstructions present turn the
power switch on the gas valve to the “OFF” position. Observe the damper to see if the damper closes.
If the damper does not close unplug the power cord from the power outlet and proceed to step 1. If the
damper closes turn the power switch on the gas valve to the “ON” position.
1. Check all wiring connections to insure all harness and wire connections are seated firmly and
provide proper electrical contact. If no connection problems are found replace the damper.
Firmly seat any loose connections found. If any connections are found to be damaged consult
the replacement parts list on pages 33-34 for the appropriate replacement. After any connection
problems are fixed restart the water heater by following the lighting instructions on page 18. If the
problem persists replace the damper.
Three Flash, three second pause End Switch Failed Open or TCO Limit Lockout Turn the power switch on the gas control valve to the “OFF” position and unplug the power cord from the
power outlet.
1. Attempt to depress the TCO door switch button, see figure 24. If the TCO door switch button
depresses follow the instructions for cleaning the filter and flame arrestor on page 26. After
cleaning is completed follow the lighting instructions on page 18. If the TCO door switch button
does not depress proceed to step 2.
2. Follow the lighting instructions on page 18. Observe the damper during initial startup. If there is a
call for heat and the damper opens allow the unit to continue to perform and monitor any change
in status. If there is a call for heat and the damper does not open proceed to step 3.
3. Check all wiring connections to insure all harness and wire connections are seated firmly and
provide proper electrical contact. If no connection problems are found replace the damper.
Firmly seat any loose connections found. If any connections are found to be damaged consult
the replacement parts list on page 33-34 for the appropriate replacement. After any connection
problems are fixed restart the water heater by following the lighting instructions on page 18. If the
problem persists replace the damper.
Four Flash, three second pause ECO Limit Lockout 1. Turn the power switch on the gas control valve to the “OFF” position, wait 10-20 seconds then turn
the power switch on the gas control valve to the “ON” position. If the problem persists replace the
gas control valve.
Five Flash, three second pause Flame Out of Sequence Turn the power switch on the gas control valve to the “OFF” position. Wait 10 minutes then follow the
lighting instructions on page 18. If the problem persists replace the gas control valve.
Six-One Flash, three second pause Soft Lockout* - Retry Limit -
Failed TFI (Trial for Ignition) Turn the power switch on the gas control valve to the “OFF” position and unplug the power cord from the
power outlet.
1. Check the incoming gas line pressure to ensure adequate supply to the water heater. If incoming
gas supply pressure is adequate proceed to step 2.
2. Check all wiring connections and insure all harness and wires connections are seated firmly and
provide proper electrical contact. If no connection problems are found proceed to step 3. Firmly
seat any loose connections found. If any connections are found to be damaged consult the
replacement parts list for the appropriate replacement. After any connection problems are fixed
restart the water heater by following the lighting instructions on page 18. If the problem persists
proceed to step 3.
3. Check condition of the base ring filter and flame arrestor. If they are clogged follow the
instructions for cleaning on pages 25-26. If parts are not clogged proceed to step 4. After
cleaning follow instructions for lighting on page 18. If problem persists proceed to step 4.
4. Follow the instructions on page 24 to remove the burner assembly. Once the burner assembly
has been removed inspect the manifold tube and burner, see figure 29 , for any obstructions. If
any clogs or obstructions are present clear them. Inspect the electrode/flame sense rod, see
figure 32 , for corrosion buildup, degradation, or damage. If there is evidence of any damage to
the electrode/flame sense rod replace the igniter/pilot assembly. Follow the directions on page 26
to re-install the burner assembly into the combustion chamber. Follow the instructions for lighting
on page 18. If the problem persists contact a qualified service representative.
* Soft Lockout - 20 minute wait before returning to normal mode.