Fisher & Paykel HC221JHU CPAP Humidifier with Hose and Mask

Fisher & Paykel CPAP humidifier, model HC221JHU. Includes a humidifier chamber, a coiled tube, and a mask. Humidifier has a 400ml capacity. Also comes with a carrying case. Comes with brand new tube, filter and water chamber It’s been in storage for a while. It has 103 hours on it which is practically new. I have plugged it in and it powers up. That is all the testing I’ve done. I don’t remember how to use it. It does come with manual.