John Wood Direct Vent - Manuel (Page 42)

42 www. johnwoodwaterheaters .com
STATUS LIGHT AND DIAGNOSTIC CODE
TROUBLESHOOTING CHART
LED STATUS PROBLEM CORRECTIVE ACTION
0 FLASHES (LED NOT LIT) Pilot light is not lit or
thermopile has not yet reached
normal operating temperature. Turn Gas Control Valve/Thermostat knob to
“OFF”. Wait 10 minutes, then attempt to relight
Pilot by following the lighting instructions on the
water heater’s label. Until the thermopile reaches
its normal operating temperature, the Status Light
will not blink, even if the Pilot is lit. It may take
up to 90 seconds of continuous Pilot operation
before the thermopile reaches normal operating
temperature and the Status Light starts to blink.
If the Status Light does not blink after three
lighting attempts, check to make sure unit is
getting gas. Remove the outer door. Press reset
button. Replace outer door. Turn Gas Control
Valve/Thermostat knob to “OFF”. Wait 10 minutes,
then attempt to light Pilot by following the lighting
instructions on the water heater’s label. Look
through the view port for the Pilot flame. If Pilot is
not visible, the spark igniter or gas supply to the
Pilot should be checked.
If the Pilot is visible and the Status Light does
not blink after 90 seconds of continuous Pilot
operation, the Pilot flame may not be heating the
thermopile sufficiently (weak Pilot), the thermopile
may be defective, or wiring connectors may be
loose.
RED LIGHT ON (SOLID) Pilot light was recently
extinguished and the
thermopile is cooling down. Turn Gas Control Valve/Thermostat knob to
“OFF”. Wait 10 minutes for the thermopile to
cool, then attempt to relight Pilot by following the
lighting instructions on the water heater’s label.
NOTE: This gas control valve/thermostat has
built-in circuitry that requires waiting 10 minutes
between lighting attempts.
Until the thermopile reaches its normal operating
temperature, the Status Light will not blink, even
if the Pilot is lit. It may take up to 90 seconds of
continuous Pilot operation before the thermopile
reaches normal operating temperature and the
Status Light starts to blink.
1 FLASH (EVERY 3
SECONDS) Normal operation. No corrective action necessary.
2 FLASHES Pilot is lit but the thermopile
is not producing the required
output voltage. Turn Gas Control Valve/Thermostat knob to
“OFF”. The thermopile is probably defective, but
loose wiring connections or a weak Pilot flame
can also cause this symptom.