PROBLEMLED STATUS
OFF
1 flash *
2 flashes *
3 flashes *
4 flashes *
POSSIBLE CAUSE(S)
Electronic control module off or pilot flame off.
Electronic control module is powered and pilot lit.
Thermopile voltage low.
Gas valve or tank sensor failure.
Gas control valve overheat failure (pilot off or burner off).
CORRECTIVE ACTION
Check wiring harness for proper connection.
Ignite pilot flame.
Normal operation. No action required.
Inspect thermopite connection to gas control valve/thermostat.
Inspect flame coverage on thermopile.
Check inlet gas pressure.
Run open circuit thermopite output test and replace pilot assembly if output is below 350 mV.
Restart gas control valve.
If main burner turns on after restart, replace tank sensor.
If main burner does not turn on after restart, replace gas valve assembly.
Replace gas control valve/thermostat.
Verify tank sensor is connected to electronic control module.
5 flashes * | Lower tank sensor failure (pilot on | |
and burner off). | ||
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Verify tank sensor is connected to the heater tank.
Run tank sensor calibration check.
Replace tank sensor and electronic control module.
GAS CONTROL
VALVE/
THERMOSTAT
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| Verify tank sensor is connected to electronic | |||
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| control module. |
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| Upper tank sensor | failure | (pilot on | Verify tank sensor is connected to the heater | ||||||
6 flashes | * |
| tank. |
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| and burner off). |
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| Run tank sensor calibration check. | ||||
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| Replace tank sensor and electronic control | |||
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7 flashes | * |
| Electronic control | module | failure | Replace | electronic control module. | |||||
| (pilot on or off and burner off). |
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8 flashes | * |
| Gas control | valve failure | (pilot off | Replace | gas control | valve/thermostat. | ||||
| and burner off). |
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6 second | solid light |
| Pilot stays tit only when | control | knob | Overheat |
| failure. Replace gas control valve/ | ||||
followed | by 4 flashes | * | is depressed | in PILOT position, |
| thermostat. |
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6 second | solid light |
| Pilot stays tit onlywhen | control | knob | Electronic control module failure. Replace | ||||||
followed | by 7 flashes | * | is depressed | in PILOT position, |
| module. |
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6 second | solid light |
| Pilot stays tit only when | control | knob | Gas control valve failure. Replace gas control | ||||||
followed | by 8 flashes | * | is depressed | in PILOT position, |
| valve/thermostat. |
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| Overheat failure and electronic control module | |||
6combinationsSeCondsolidoflight4+with7 | Pilot stays tit only when | control | knob | failure. Replace gas control valve/thermostat. | ||||||||
flashes * |
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| is depressed | in PILOT position. |
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6 second | solid light with | Pilot stays tit only when | control | knob | Overheat failure and gas control valve failure. | |||||||
combinations of 4+ 8 |
| is depressed | in PILOT position. |
| Replace | gas control | valve/thermostat. | |||||
flashes * |
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6 second | solid lightwith | Pilot stays tit onlywhen | control | knob | Electronic | control | module failure and gas | |||||
combinations of 7 + 8 | is depressed | in PILOT position, |
| control valve failure. Replace gas control valve/ | ||||||||
flashes * |
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| thermostat. |
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6combinationsSeCondsolid light with | Pilot stays tit only when | control | knob | Overheat failure, electronic control module | ||||||||
failure, and gas control valve failure. Replace | ||||||||||||
of 4 + 7 + 8 flashes * |
| is depressed | in PILOT position, |
| gas control | valve/thermostat. | ||||||
Continuous solid light |
| System shutdown/safety |
| interlock, | Wait until light goes outto restart the gas control | |||||||
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| valve/thermostat. |
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•Flashes are approximately 1/10 second in duration with approximately three seconds between groups of flashes.
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