DIAGNOSTIC PROCEDURES - TROUBLESHOOTING GUIDE
Unit Status Lamp |
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| Symptom |
| Corrective actions |
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Yellow | Green |
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On | On | Maximum water level | This usually happens on initial | ||
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| inside cylinder. | (normal). |
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| Water is concentrated with minerals inside the cylinder. |
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| Let unit run, yellow light will disappear when the unit is at full | ||
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| output. This may take a day or two. |
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Off | Off | No power to the | Check for main power supply fault. |
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| board. | Turn power switch to ‘Drain’ position. If drain valve is activated | ||
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| (sound of solenoid), check connection to the board or board itself. | ||
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| When no sound present, check fuse (replace with 3.0 A if needed), | ||
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| transformer (voltage should be present between fuse holder and | ||
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| ground screw). |
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1 flash | Off | Excess current. | Check drain valve operation, drain time, possible drain | restric- | |
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| Operating amperage | tions. |
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| exceeded 130% of | Check if fill valve leaks (not holding supply water). |
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| rated amps. Water is |
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| Back pressure may also cause very conductive water | conditions. | ||
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| drained from the | |||
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| cylinder (drain valve | Was the humidifier short cycling? |
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| on for 10 min.). |
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| Check for short cycling. |
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| Water conductivity too high. |
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2 flashes in | Off | No current | Check water level in the cylinder - should be more than ¼ full. If | ||
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| detection for 30 | not check fill rate, 24 VAC voltage on fill valve terminals (unit must | ||
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| minutes with | be on with call for humidity - green light steady on). Verify fresh | ||
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| continuous call for | water | supply to the humidifier. Leaking drain valve | |
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| humidity. | can be at fault | (minerals blocking the plunger). | |
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| If cylinder is more than ¼ full, check primary power, connections to | ||
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| the cylinder, continuity of wires to cylinder. |
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| Are power wires connected to proper terminals on the cylinder? | ||
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| (Color coding) |
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| Possibly wrong cylinder type. |
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| Low water conductivity. |
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4 flashes in | Off | End of cylinder life - | Check water level in the cylinder, should be about ¾ full. | ||
sequence |
| change cylinder. | Check for foaming if water level lower or cylinder life shorter than | ||
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| expected. |
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| Change cylinder, clean drain valve. |
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