VZM32-SN flickers on LED wafers at low levels where the VZM31-SN doesn’t

Product Support
, , , , , , , ,
1

I’ve been swapping some of my Blue 2-1s (VZM31-SN) for the mmWave VZM32-SN, and the kitchen now has a steady flicker at low brightness that it didn’t have before. The flicker changes with the level and goes away at about 14% in HA with min 13 / max 190, which works out to roughly 41 on the switch’s own scale. There’s nothing else running on nearby circuits or anything like that.

The switches are set up neutral, single pole with one smart aux bound over Zigbee, 8 LED wafers, Z2M 2.14.1. The kitchen draws about 7.8 W at ~14%.

Here’s what I tested in the same box on the same load, all trailing edge, Single Pole, Dimmer, output range 13 / 190:

  • VZM31-SN (spare): no flicker at 1%
  • VZM32-SN #1 (the one I installed): flickers
  • VZM32-SN #2 (borrowed from another room): flickers

Both VZM32s are on the latest firmware in Z2M. The same wafers dim fine on a VZM32 on another circuit (min 8), but that circuit only has 6 wafers.

So it looks like the VZM32 just can’t go as low as the VZM31 on this load. Is that a known difference in the output stage? Are there any settings worth trying besides just giving up on my previous dimming minimum level?

2

On the original Dimmers, did you set the dimming mode to Trailing Edge? And if so, have you done the same for your new mmWave Dimmers?

Enable Trailing Edge Mode

To put your switch into Trailing Edge Mode (for dimming) on your Blue Series Dimmer Switch, hold down on the bottom part of the paddle (off) while simultaneously tapping the configuration button thirteen (13) times (do not let go of the paddle when finished tapping the config button). Wait for the LED Bar to flash solid indigo (and then let go of the paddle) indicating the switch has enabled Trailing Edge Mode. Please note switching between Leading Edge & Trailing Edge Mode is only available on firmware version 2.15 and above.

3

Sorry, yes, shared/overlapping settings are identical across both switches, including trailing edge dimming