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smcgrathAug 12, 2025
How to check the clogging state of the filters in my Sullair DHL-200?
- NNancy MorrisAug 12, 2025
To check the clogging state of the filters, read the differential pressure gauge installed on your Sullair Dehumidifier.
How to check the clogging state of the filters in my Sullair DHL-200?
To check the clogging state of the filters, read the differential pressure gauge installed on your Sullair Dehumidifier.
What to do if the alarm light is ON on my Sullair DHL-200 Dehumidifier?
If the alarm light is on, check the display to see if the filter needs replacement. If differential pressure switches are installed on the filters, replace the filter elements. If there are no switches, and it has been 6000 hours, replace the element. A high dew point alarm indicates that the dew point at the outlet exceeds 33 degrees F; in this case, refer to the troubleshooting steps for 'Moisture in the Outlet Air'. If an optional pressure switch in either the right or left tower has failed, identify the unpressurized tower via the screen, follow steps 2, 3, and 4, and replace the faulty pressure switch if necessary.
What to do if my Sullair DHL-200 Dehumidifier dryer towers do not switch correctly?
If the dryer towers on your Sullair Dehumidifier aren't switching correctly, the issue might stem from the solenoid valves PVA and/or PVB not activating. Refer to the specific troubleshooting steps for that problem. Alternatively, the inlet and/or outlet valve could be blocked, or the inlet solenoid might not be working; perform necessary maintenance. Also, inspect the purge exhaust mufflers for cleanliness and replace them if needed.
What to do if all the inlet air is discharged through the purge exhaust mufflers of my Sullair DHL-200?
If all the inlet air is being discharged through the purge exhaust mufflers of your Sullair Dehumidifier, it could be due to several reasons. First, the dryer may not be performing the switching cycles correctly, so refer to Step 2. The purge solenoid valve PVA and/or PVB might be blocked, requiring you to open and clean it. Another possibility is that the SHDC-2300 electronic controller is constantly supplying solenoid valve PVA and/or PVB; in this case, check the wiring and replace it if necessary. If the cycle times on the SHDC-2300 electronic controller have been changed, restore them to their original settings. Lastly, the regeneration nozzle could be clogged, so open and clean it.
Why are purge solenoid valves never activated in my Sullair Dehumidifier?
If the purge solenoid valves in your Sullair Dehumidifier are never activated, check the electrical supply or on/off switch for failures and verify the electrical wiring. The valve may also be blocked, requiring you to open and clean it. If the solenoid valve has failed, replace it.
What does it mean if there is liquid at the purge exhaust mufflers of my Sullair DHL-200?
If you notice liquid at the purge exhaust mufflers of your Sullair Dehumidifier, it indicates humidity in the outlet air. Refer to the troubleshooting steps for 'Moisture in the Outlet Air' to resolve the issue.
What causes Hi-Dew point in Sullair DHL-200 and how to resolve it?
A high dew point in your Sullair Dehumidifier can be caused by several factors. It may indicate humidity at the dryer outlet, in which case you should refer to the troubleshooting steps for 'Moisture in the Outlet Air'. Ensure a constant airflow through the dew point measuring cell if the dew point meter has been changed. A blocked shuttle valve supplying air to the dew point meter should be cleaned to ensure dry air flows from the tower during drying. If the probe is broken, replace it. Air leaks in pipes or joints connecting the equipment should be verified and damaged parts replaced. Finally, a clogged pipe or joint connecting the equipment needs replacement.
Why is there moisture in the outlet air of my Sullair DHL-200 Dehumidifier?
Moisture in the outlet air of your Sullair Dehumidifier can occur for several reasons. It could be that the dryer is switched off—simply turn it on. If the dryer was recently commissioned, the adsorption material may contain humidity; run the dryer at about 50% flow for at least two days and check its operation. Other potential causes include the inlet air being too hot (restore to nominal conditions), the inlet pressure being too low (verify the correct regeneration nozzle for your dryer's rated pressure), or the inlet airflow exceeding the dryer's rate (reduce the flow). Also, check if the inlet filter isn't draining condensate properly or if its electronic timer isn't adjusted correctly (reduce the drain pause timer). A pressure gauge reading higher than zero on the regenerating tower, ...
Key safety points for end users and operators.
Critical warnings regarding dryer operation and potential hazards.
Criteria for choosing an appropriate and safe location for the dryer.
Checks to perform before initial dryer startup.
Step-by-step guide for the first operation of the dryer.
Description of the dryer's main interface and controls.
How the heatless regenerative adsorption dryer functions.
Explanation of control panel indicators and operational modes.
How to configure the dryer's operating parameters.
Guide to setting the dryer's operational parameters via DIP switches.
Procedure for running diagnostic tests for troubleshooting.
Recommended maintenance tasks and intervals.
Daily, yearly, and multi-year maintenance tasks.
Identifying and resolving common issues with the dryer.
General| Brand | Sullair |
|---|---|
| Model | DHL-200 |
| Category | Dehumidifier |
| Language | English |
