6.8.3 Troubleshooting the 24 VAC Circuit in FBRA18 Units
UNIT IS CONNECTED TO
POWER SUPPLY, DRAIN
VALVE IS FULLY CLOSED,
NO WATER IS IN POT,
CONTROLLER IS ON.
Is POWER | No |
| Go to |
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LED lit? |
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| "A". |
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| Yes |
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| Ensure upper water level | |
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| sensor is not grounded (i.e., 24VAC | |
Is WATER | No |
| present across sensor and cabinet). If | ||
LED lit? |
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| sensor is not grounded, most | ||
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| probable cause is failed | |
| Yes |
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| interface board. |
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| Most probable cause is |
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Is unit filling | No |
| a failed solenoid, but may | ||
| also be a failed water relay on | ||||
with water? |
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| interface board or failed | |||
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| Yes |
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| interface board. |
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Once water |
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reaches upper water |
| No | Is WATER | No | |
level sensor, does filling stop | |||||
and WATER LED | LED lit? | |
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go out? | Yes | |
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Yes |
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| Most probable cause is dirty upper | |
Water leg of 24V | water level sensor, but could also be a | |
loose connection between sensor and | ||
circuit is OK. | ||
interface board, or a failed interface | ||
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| board. |
Most probable cause
is failed solenoid, but may also be a failed water relay on interface board.