SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
LED INDICATORS ON HOT SURFACE IGNITION (HSI)
USING FLASHING RED LED ON HSI (HOT SURFACE IGNITION)
| LED STATUS | INDICATION | ACTION TO BE TAKEN |
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| 7 Flashes | Flame sensor reads a | Verify that the main |
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| low flame signal for | burner flame is in contact |
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| more than 4.25 sec. | with the flame. |
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| Check wiring and |
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| connection to HSI |
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| assembly. |
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| Clean the flame sensor |
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| rod of soot or metal |
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| flakes. |
| 8 Flashes | No ignition sensed | Check igniter for lack of |
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| voltage, cracks, or lose |
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| connection. |
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| at 77° F (25° C) is “good”] |
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| Check ground |
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| connection. |
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| Continuous | Continuous flame | Check that the gas valve |
| Flash | sensed for more than 5 | is not failing to close at |
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| seconds without gas | the end of a heating |
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| valve being energized | cycle. |
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| Continuous | Internal control board | Replace ignition control |
| ON | failure. | board. |
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Technical Training Department | 39 | ©2003 |
Ashland City, Tennessee
