# Samsung Gen7 PWM Pump?

**URL:** <https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299>\
**Category:** Heatpump\
**Tags:** samsung\
**Created:** [26 November 2024 19:26 UTC](https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299 "2024-11-26T19:26:55Z")\
**Posts on this page:** 5\
**Page:** 2

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**Author:** ![glyn.hudson](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/glyn.hudson/32/35003_2.png) [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\
**Post date:** [7 December 2024 12:33 UTC](https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299/21 "2024-12-07T12:33:09Z")

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> [@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](https://community.openenergymonitor.org/t/samsung-mim-c02n-s-net-pro-dongle/25418/9):
>
> Nice work! I think partner hub is showing that DB91-02450A\_220706 is the latest version for your HP Same for the EEPROM

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**Author:** ![toadhall](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/t/34f0e0/32.png) [@toadhall](https://community.openenergymonitor.org/u/toadhall)\
**Post date:** [10 December 2024 18:28 UTC](https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299/22 "2024-12-10T18:28:36Z")

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> [@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

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**Author:** ![jakeymd1](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/j/db5fbb/32.png) [@jakeymd1](https://community.openenergymonitor.org/u/jakeymd1)\
**Post date:** [10 December 2024 18:43 UTC](https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299/23 "2024-12-10T18:43:21Z")

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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.

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**Author:** ![jakeymd1](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/j/db5fbb/32.png) [@jakeymd1](https://community.openenergymonitor.org/u/jakeymd1)\
**Post date:** [31 December 2024 20:02 UTC](https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299/24 "2024-12-31T20:02:45Z")

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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.

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**Author:** ![jakeymd1](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/j/db5fbb/32.png) [@jakeymd1](https://community.openenergymonitor.org/u/jakeymd1)\
**Post date:** [4 January 2025 13:12 UTC](https://community.openenergymonitor.org/t/samsung-gen7-pwm-pump/27299/25 "2025-01-04T13:12:47Z")

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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!

 ![Screenshot_20250104_130754_Chrome](https://community.openenergymonitor.org/uploads/default/original/3X/a/c/ac7ec7d3ceecb9e6323a9f24cf035a38cafe80a0.jpeg)

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