Table 1. Troubleshooting Symptoms
System | What to Check | Why |
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Nothing is happening when the | Main power is on and matches the | No, or improper voltage can cause the |
on/off switch is turned on | specified voltage on the specification label. | electronics or components not to respond. |
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| 24 VAC output from the | 24 VAC is required to power nearly all the |
| transformer. Check high and low voltage. | components of the humidifier, including the |
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| electronics. |
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| Ensure that fuses in the humidifier and on | The fuses are in place to prevent damage |
| the electronic boards are good. Ensure | to the electronics. If there was a surge the |
| that 24 VAC is getting to the main board. | fuse may have blown to prevent damage |
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| to the unit. |
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| Door interlock open. | The door interlock has malfunctioned. |
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The unit will not fill or fills very | Water supply is on and water pressure is | The proper water volume and pressure |
slowly (less then 1” per minute) | between 30 to 80 psig | must be available as the valves in the NH |
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| unit rely on its pressure to control volume |
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| and operation. NORTEC recommends 55 |
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| to 60 PSIG. |
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| Unit is getting a demand signal or the unit | The unit will not activate the fill valve |
| is producing the required steam capacity. | without a demand for humidity. It will also |
| See ensuring demand Table 2. | only fill as necessary once there is a |
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| demand. Once it reaches the requested |
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| demand, it will stop filling. |
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| No leak at drain valve or around cylinder. | The cylinder is held in by gravity and |
| Check for water coming out of the drain. | sealed by an |
| Check the fill valve inlet. | it could leak and prevent the unit from |
| Check fill valve strainer. | filling. |
| Check optional inline filter. | Drain stuck open |
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| Pressure in the steam line could also |
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| prevent filling causing the water in the fill |
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| cup to overflow to drain. |
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| Strainer is clogged. |
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| Fill valve may also be restricted after |
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| capturing debris in its filter. |
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Unit will not humidify or is not | Unit is getting a demand signal. Refer to | Unit will not send power to the cylinder |
reaching requested capacity. | Table 2. | without a demand and safeties met. |
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| Capacity is manually limited. | The unit will not surpass the capacity |
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| dictated by the user in the software. |
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| Cylinder is full. | The unit will not fill further than a full |
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| cylinder. Operation requires it to try to |
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| concentrate the conductivity, which may |
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| take several hours, before it reaches full |
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| capacity. |
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Unit has faulted or has a | Check Table 3, Faults and Warning Codes | Each code is identified and each has |
warning |
| individual causes and solutions. |
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