IHC-200 Switching between Work1 & Work2

I am using the IHC-200 in my greenhouse to control a humidity. The controller will randomly switch between work1 and work2, the humidify and dehumidification settings and I’m trying to figure out why. It doesn’t always do this, mainly in the winter time. Is it due to something I have input in the settings? Also sometimes the light for either option will not be lit up.

Hello,
May I know what humidity range you want to maintain?
HS is target humidity.
HD is humidification differential value.
DD is dehumidification differential value.
The principle of IHC-200 is:
When humidity reaches/ is lower than (HS-HD), it will turn on the work 1 indicator and humidifier (work 1 socket), turn off at (HS).
When humidity reaches/ is higher than (HS+DD), it will turn on the work 2 indicator and dehumidifier (work 2 socket), turn off at (HS).

For example, you want to maintain 47% ~55%. Please set HS=50, HD=3, DD=5.
When humidity reaches/ is lower than 47% (HS-HD), it will turn on the work 1 indicator and humidifier (work 1 socket), turn off at 50% (HS).
When humidity reaches/ is higher than 55% (HS+DD), it will turn on the work 2 indicator and dehumidifier (work 2 socket), turn off at 50% (HS).

Thank you! My HS is 75, I have the HD at 5 and DD at 1. I believe I set it up that way from watching a YouTube video. So my DD needs to be higher then the HD?

Hello,
HD affects humidification control, and DD affects dehumidification control. It does not limit that DD needs to be higher than HD.
If you set HS=75, HD=5, DD=1.
When the humidity reaches or below 70% (HS-HD), it will turn on the humidification output (work 1), and turn off when the humidity reaches 75% (HS).
When the humidity reaches or exceeds 76% (HS+DD), it will turn on the dehumidification output (work 2), and turn off when the humidity reaches 75% (HS).