Samsung Gen7 PWM Pump?

[glyn.hudson]

@SarahH

For those of us who can’t, even if they have a (borrowed ) MIM-C02N, how can they check that their FW is up to date?

I think these are the latest FW versions for your unit

Samsung MIM-C02N S-NET Pro Dongle

Nice work! I think partner hub is showing that DB91-02450A_220706 is the latest version for your HP [Screenshot from 2024-04-08 00-19-33] Same for the EEPROM [Screenshot from 2024-04-08 00-27-31]

[toadhall (Alun Hawkins)]

@jakeymd1

This is my understanding too, but never been able to get it into PWM mode. Let me know how you get on.

It worked fine. When the PWM signal starts up the pump uses that in preference to the speed selected by the button. The green LED also flashes slowly to indicate it is using PWM. When the PWM signal stops it reverts to the preset speed and the LEDs go back to as they were before PWMing

[jakeymd1 (Jake Dawson)]

Yeah that’s the same as what I’ve found on my now installed UPM4. Except I’m sending the PWM signal from a standalone PWM controller as its still not working from Samsung controller.

[jakeymd1 (Jake Dawson)]

Update - I was speaking to Samsung tech support before xmas and they think there is an issue with the PCB in the MIM-E03EN. They are sending me a replacement under warranty next week.

It seemed that while I was getting a PWM signla my voltage was 7.5V (low) and 12.1v (high). The low should be below 1v which is why the pump wasn’t kicking into PWM mode.

I will update again once I’ve replaced it.

[jakeymd1 (Jake Dawson)]

Replacement PCB arrived yesterday and I swapped it in. Did a manual run at 25 degree flow temp this afternoon to try and force PWM operation and it worked!