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- Tue Feb 27, 2024 3:16 pm
- Forum: CPAP and Sleep Apnea Message Board
- Topic: HDM Z1 Have a fault 33 code. Anyone know how to fix it?
- Replies: 63
- Views: 92588
Re: HDM Z1 Have a fault 33 code. Anyone know how to fix it?
I have two devices Z1 from 2017. and both have fault 33 within a month of each other. After reading the messages in this thread. i replaced the battery with a BR1225 and updated the date and firmware. but the problem did not go away!