5. Control Options
The Quest 335 Dehumidifer can be controlled by its on board dehumidistat or with an external control using its low
voltage terminal block.
5.1A Quest 335 On Board Dehumidistat
Of Mode: Fan, Compressor, Display and all LEDs are of
To Turn Unit On: Press the power button
On Mode: Display is on and shows the set point (Initial set point: 55% RH)
To Change Set Point:
- Press the up or down arrow once, the 2-digit display will begin to blink.
- Adjust to desired RH. Each push of the button will change the SP 1% RH.
- After 6 seconds without a button being pushed the number showing will become the new SP
Defrost Light
- The light over the snowfake will light up when defrost is occurring (ice is detected on coils). The fan will be on, and the
compressor will be of during defrost.
Filter Reset
- Filter reset button will light up after the fan has been running for 2,000 hours, or if the pressure switch detects excessive
pressure build-up indicating that the flter must be changed.
- After changing the flter, press and hold the flter reset button to reset the 2,000-hour timer. Light fashes while button is
held.
Dark Mode
- Press the Dark Mode button to activate Dark Mode.
- Once Dark Mode is activated, lights will remain on for 20 seconds before the unit’s hygrostat will go dark. Dark Mode
light will fash for 3 seconds before unit goes dark.
- Unit will temporarily leave dark mode when any button is pushed and will go dark 20 seconds after the last button is
pushed.
- To turn of Dark Mode, press the Dark Mode button and ensure light above Dark Mode button is of.
- This mode is for applications where the user would like the unit to operate without emitting any light.
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