Status Light And Diagnostic Code - Lochinvar LTN07575 Instruction Manual

TABLE 5. STATUS LIGHT AND DIAGNOSTIC CODE TROUBLESHOOTING CHART
LED Status
0 FLASHES (LED NOT LIT)
LIGHT ON (SOLID)
1 FLASH (EVERY 3 SECONDS)
2 FLASHES
4 FLASHES
Problem
Pilot light is not lit or Thermopile has not yet
reached normal operating temperature.
Pilot light was recently extinguished and the
Thermopile is cooling down.
Normal Operation
Pilot is lit but the Thermopile is not producing
the required output voltage.
The Gas Control Valve's temperature sensor
has detected that the water temperature was
too high. Once this condition occurs, the
Main Burner and the Pilot Light will be shut
off. Since the Pilot light will be off, should this
condition occur, this Flash Code will only be
displayed immediately after the Pilot has been
relit. Turn Gas Control Valve/Thermostat knob
to OFF.
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 tempera-
ture, the Status Light will not blink, even if the Pilot is lit.
It may take up to 90 seconds of continuous Pilot opera-
tion before the Thermopile reaches normal operating
temperature and the Status Light starts to blink.
If the Status Light does not blink after three lighting at-
tempts, 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.
NOTE: If the water heater has been operating but has
stopped and will not re-light, check the flame-arrestor
for signs of high temperature (blue or black) discolor-
ation indicating a flammable vapor incident. If you sus-
pect a flammable vapor incident has occurred, do not
use this appliance. Immediately call a qualified techni-
cian to inspect the appliance. Water heaters subjected
to a flammable vapors ignition will require replacement
of the entire water heater.
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 tem-
perature, 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 oper-
ating temperature and the Status Light starts to blink
No corrective action necessary.
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.
Relight pilot and verify 4 flashes. If 4 flashes are
observed, turn Gas Control Valve/Thermostat knob to
OFF. Turn Main Gas Supply OFF. Replace the Gas
Control Valve/Thermostat. See Removing and Replac-
ing the Gas Control Valve/Thermostat (page 32).
34
Corrective Action