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| Probable Cause |
| Corrective Action |
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| 1. | The high limit is too close to the distributor. | 1. | Relocate high limit 10 feet from the steam |
| 2. | Is there loose wiring? |
| distributor. |
| 3. | Are there defective controls? | 2. | Check all wires at the safety controls. |
| 4. | Is the safety high limit set point is too low? | 3. | Replace any defective device. |
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| 4. | Change high limit set point to 85% or more. |
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| 1. | The high limit is too close to the distributor. | 1. | Relocate high limit 10 feet from the steam |
| 2. | Is the controller defective? |
| distributor. |
| 3. | Are the P and I settings incorrect? | 2. | Replace the controller. |
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| 3. | Adjust the P and I constants. |
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| 1. | The high limit is located too close to the distributor. | 1. | Relocate high limit 10 feet from the steam |
| 2. | Is the controller defective? |
| distributor. |
| 3. | Are the P and I settings incorrect? | 2. | Replace the controller. |
| 4. | Safety high limit set point is set too low. | 3. | Adjust the P and I constants. |
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| 4. | Change high limit set point to 85% or more. |
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| Contact the system administrator to override the remote | ||
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| command. | |
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| To disable this feature, consult the programming manual | ||
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| shipped with the humidifier. | |
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| 1. | Is the humidifier oversized? | 1. | Reduce manual capacity setting by 50%. |
| 2. | Check the sensor location. | 2. | The sensor should be located away from doors and |
| 3. | Are the P and I settings incorrect? |
| drafts. |
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| 3. | Adjust the P and I constants. |
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| 1. | Is the humidifier oversized? | 1. | Reduce manual capacity setting by 50%. |
| 2. | Is the high limit located too close to the distributor? | 2. | Relocate the high limit to 10 feet from the steam |
| 3. | Are the safety controls damaged? |
| distributor. |
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| 3. | Replace any damaged controls. |
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| 1. | Is the humidifier still operating? | 1. | Verify that the RH setpoint is less than the RH high limit |
| 2. | Is the humidifier oversized? |
| setting. |
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| 2. | Reduce the manual capacity setting by 50%. |
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| 1. | Is the humidifier still operational? | 1. | Verify that the RH setpoint is greater than the RH low |
| 2. | Is the humidifier oversized? |
| limit setting. |
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| 2. | Set the manual capacity setting to 100%. |
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| 3. | Add more humidifiers. |
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| Verify that the replacement cylinder is the same as the old | ||
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| cylinder. | |
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| 1. | Loose wire. | 1. | Verify cables. |
| 2. | Electronics damaged. | 2. | Replace electronics or contact factory. |
| 3. | Electromagnetic Interference. |
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