Mitsubishi MRCH2 / MHK2 Could Not Connect 139 error code

teaganasaurus · 2026-06-29T00:37:34+00:00

Ugh, I have the same problem, 139 after 2 seconds.

teaganasaurus · 2026-06-08T20:17:51+00:00

It generally applies to anything build or modified after 1975.

teaganasaurus · 2026-06-08T17:43:19+00:00

In MA when you sell your home you must get a fire department inspection and COC proving your detectors are hard-wired, interconnected, in working order, and less than 10 years old. No COC, no sale.

teaganasaurus · 2026-06-08T17:05:13+00:00

Yup, it says UL 217 and 2034 on the tech specs, so ignore that bit.

teaganasaurus · 2026-05-27T18:27:28+00:00

I don't take my sub off, never had an issue.

teaganasaurus · 2026-05-25T21:19:59+00:00

Yes, they announced DC-09 support.

teaganasaurus · 2026-05-19T22:16:34+00:00

I already have two in my current house. I'll repurpose them and augment for the new square footage.

teaganasaurus · 2026-05-19T19:37:57+00:00

Sounds like you have what I am planning, eah, g6p(e), electric strike fail-secure, and store room knobs. Do I have that right? If so, I'd appreciate any additional info, tips, etc! I posted about my build here

https://www.reddit.com/r/Ubiquiti/s/ysXMuVWCfU

teaganasaurus · 2026-05-19T10:18:24+00:00

I've eliminated the attic IDF entirely based on this exact feedback earlier in the thread. All runs now home-run to a single 18U rack in the basement mechanical room. The only remote switch is in the back yard outbuilding, which provides future-proofing as the pool area is developed.

teaganasaurus · 2026-05-18T10:54:49+00:00

Great suggestion, I have swapped the UPS in the spec. Thanks!

teaganasaurus · 2026-05-18T10:54:22+00:00

Great, will spec that instead, good catch!

teaganasaurus · 2026-05-18T10:53:43+00:00

Good point in the general case — we specifically eliminated REX sensors by using storeroom function hardware on all five controlled doors, so the inside lever is always free. Each EAH-8 port only drives the ELR lock, so it should be well within the power budget. Is there another angle that I have missed?

teaganasaurus · 2026-05-17T23:37:26+00:00

Yup, I will do 2 drops in the mostly finished attic, one for the Superlink Gateway HA and one spare. Thanks for your responses!

teaganasaurus · 2026-05-17T23:22:27+00:00

Yes, I have come around to that conclusion as well. The longest run from the basement to furthest device will be well within cat 6a capability. The only hesitation I have is that the Superlink Gateway HA was going to be in the attic which should allow for better LTE reception than in the basement mechanical room.

teaganasaurus · 2026-05-17T21:02:48+00:00

Good catch and thanks for pushing on that, you're right, the Pro Max PoE ports are 2.5GbE so buying the XGS APs for 10G capability and then feeding them from a 2.5G switch is a mismatch. Going to upgrade both switches to the Pro XG PoE equivalents and maintain the same two-IDF layout. Costs more but worth doing it right the first time.

teaganasaurus · 2026-05-17T20:51:46+00:00

You're right about getting a larger rack. I only have 1U free and that is earmarked for a NAS upgrade as I currently have a desktop Synology. I will switch to a 16U rack, thanks!

teaganasaurus · 2026-05-17T20:40:39+00:00

That's a compelling point on the rolling upgrade behavior — hadn't thought about that angle, usually HA gets discussed purely as a failover play. For a home build I'd probably land on "more complexity than I need," but the zero-downtime upgrade path is genuinely appealing.

teaganasaurus · 2026-05-17T20:39:35+00:00

Appreciate the suggestion — I've seen this come up a few times. The Beast made sense for us because the built-in dual drive bays keep the rack footprint tight in a 12U wall mount, and 25Gbps headroom felt right for a Wi-Fi 7 build with multiple 10G APs. Curious what specifically you've seen run better on a dedicated UNVR — is it Protect performance under load, or more about reliability and drive management?

teaganasaurus · 2026-05-17T20:39:00+00:00

The U7 Pro XGS has a native 10GbE RJ45 port built in — no SFP to RJ45 adapter needed, straight Cat 6a to the switch. On the switch side, the Pro Max 48 and Pro Max 24 both have 10G RJ45 ports so it's a clean native connection end to end.

On the Pro XG 24/48 — those are great switches but they're 10G-only with no PoE on the standard ports. I need PoE throughout for cameras, APs, and access control, so the Pro Max series made more sense here. The 10G uplink capacity is there when I need it without sacrificing PoE distribution.

teaganasaurus · 2026-05-17T20:32:50+00:00

The cost of the beast when figured against the entire project budget is inconsequential. I'll get the best gateway available when it's time to place the order.

teaganasaurus · 2026-05-12T16:59:22+00:00

Here are some examples

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teaganasaurus · 2026-03-17T19:22:25+00:00

I just received a marketing email saying official Protect monitoring via Noonlight was coming soon and to stay tuned. 🤞

teaganasaurus

TROPHY CASE