Red Series Dimmer LZW31-SN No LED, no on off after power loss

Switches Wiring Discussion
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1

I’ve had this switch working great for months, and have no complaints.

Today we had a brownout, and when the power was restored 1 of my 3 LZW31-SN has the following symptoms:

  • No LED
  • No on/off functionality (stuck off), even if reporting on to z-wave
  • Not able to enter config mode via button

It is however, still sending events/scenes/whatever. I can double tap/triple tap and it sends the event and does what is supposed to do.

It is installed in a non-neutral configuration (and I had configured it as such). The only thing that made this light different from the other two, non-failed switches, is that for power failure I had this one set to return to “99” while my other LZW31s are set to off.

Turning the switch on and off via z-wave does nothing. Setting the LED state/level/pattern via z-wave does nothing. All the config settings are saved, they just have no impact. Switch Z-wave is reporting that is awake and ready.

It reports the light state is on, at maximum brightness, but consuming no power.

I’ve seen some reports that the relay function gets messed up on power loss, but I’m just powering a dumb LED bulb with this, have never set it up as a relay, and can’t actually figure out where that setting would be (doesn’t show up on my HA config).

2

Since the switch was responding to z-wave, I changed the config setting for power failure to 0 (off) like the other two switches. I then used my circuit breaker to power cycle the switch and… voila, the switch has returned to normal functioning.

My issue is resolved, hope this helps someone else out there.

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3

I am having almost the exact same issue as you did, but slightly different.

I had a power outage at my place and 1 out of 4 of my LZW31-SN switches is misbehaving.

It responds to all z-wave actions. I can turn the load directly connected to the switch on/off via z-wave, the switch will fire various scenes, 2x tap, 3x tap etc…But a single tap on the paddle will not turn on/off the load connected to the actually switch.

I’ve tried using the air gap several times with no luck. I’ve tried what worked for you. Setting the power failure setting to off and turning the switch off via the breaker. But its not working.

I cant seem to reset the switch to factory settings either via the config button.

4

Try an 8x config press. That will toggle disabling local control. If it flashes green, disable local control was enabled. If it flashed red, do it again to turn local control back on.

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5

That did the trick!

Thank you so much!

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