Daikin Puns

The manual technically recommends stranded but I assume Lumix is okay?

what do you guys think?

I'm a commercial tech so I don't do much of this stuff.

Good evening guys.

So I have a client with a 2 ton daikin fit with a one+ I have used shielded 2 strand 18 gauge wire to the outside unit and used shielded 4 strand 18 gauge wire to the thermostat. Shielded is put on the air handler.

Everything follows so data 1 and data 2 are the same color on the same wire and r and c are also matching. I have .6Vdc as required from the manufacture but i get an intermittent error code 51 and 21 which stops the unit.

I've contacted my local supplier but they aren't much help other than telling me to make sure no high voltage is near the com wire. Which it isn't.

Could it be a bad board or t-stat? Im honestly bot sure where to go from here with this client

Thank you guys or girls ahead of time.

Hi i have new 2 ton daikin fit , with 800 cfm Daikin furnace with new ductworks ( retrofit in my house )

My main supply size is : 7 1/2 x 20

Return duct size : 7 x 14

Been - 20 degrees celsius for 3 days this week first time this year and takes 7 hours to get half degree and was stalling at 16 celsius , very low airflow , fell heat little bit , one technician tell me to remove the filter and let the door open to let it breath after he ask me the size of the ducts , he's a Daikin technician, he explain to me that is it choking not enough air coming in to redistribute , after that it takes more then 12 hours to go to 20 degrees.... aux heat was runnning 24/7 for more then 3 days at 10kw...very expensive to run....and beside that he said maybe you have another problem too ....he said , daikin fit goes -30 , there no way its supposed to be cold inside , its impossible.....

What do you think please......

Thanks!

Any experience working on this brand? What are your opinions? Thanks in advance.

We recently replaced a 23-year old ducted system with a Bryant Preferred 2-Stage Heat Pump and a backup 80% 70K BTU furnace. The local installer did a pretty good job and the system works well for our needs.

Here in Northern California (Bay Area) temps usually never get below 40F. We have enough solar to where the Heat Pump is more economical than burning Natural Gas. Given my $/kWh (and $/Therm) the break-even COP vs Natural Gas is about 3.46. The Bryant unit has a COP rated at 3.90 @ 47F and 2.72 @ 17F.

Temps here have been getting into upper 30Fs/lower 40Fs the Heat Pump is running almost continuously easily consuming 50-60kWh/day. I did not anticipate the Heat Pump to burn that many kWh and operate for so long.

Did I mess up?

Should I have gotten a more efficient unit like a Daikin or Mitsu heat pump for my climate? For an equivalent BTU Daikin or Mitsu unit COP at rated capacity is almost identical at nominal temps, but higher at lower temps (~0-20F) and minimal capacity (expcted for variable inverter units).

I'm still pretty happy with the decision. Especially considering the Daikin and Mitsu units and installers are more expensive up front. And while they fail less often and have longer warranties, the cost of out-of-warranty repairs/service is pretty high. What do you guys think

Source: https://neep.org/sites/default/files/ColdClimateAir-SourceHeatPumpSpecificationProductListing-Updated11.30.18.xlsx

https://preview.redd.it/vajje07q38781.jpg?width=1422&format=pjpg&auto=webp&s=18e80991dfa490b4bb8fbb92b37a3a7f32af08dc

TLDR: Mitsubishi or Daikin ductless mini-split?

Interested in advice for a heating/cooling solution for master bedroom, master bathroom, and small walk-in closet in the Midwest/USA. Our home is a split level ranch and the area described is an addition where the foundation was expanded. This area is roughly 21 ft x 16 ft with 8ft ceiling and sits on top of an unheated shop area. Half of the shop area is surrounded by earth (area sits on a hill). This area is a finished room over an unfinished garage/shop type area.

About 4 years ago, we had a new Trane XC95M 80k BTU modulating furnace installed (along with 16 SEER AC unit) hoping that with the furnace running more often, more heat would reach the area in the winter. Unfortunately, this didn't happen and the area is still significantly colder in the winter than the rest of the house - roughly 8 degree F. The combination of the room being far away from the furnace and the ductwork going through unheated garage and shop area were too much to overcome.

I've received a proposal for a Daikin Aurora 12,000 BTU ductless heat pump system that's around $5,000 from a Daikin Comfort Pro installer. I have another proposal on a comparable Mitsubishi Hyper-Heating 12,000 BTU system that's ~ $5,800 by a Mitsubishi Diamond Elite installer. We plan to live in this house for the foreseeable future and generally subscribe to the buy once, cry once school of thought.

The main pros for the Mitsubishi system (MSZ-FS12NA & MUZ-FS12NA):

1. The Mitsubishi system heats with 100% capacity to a temp that is 10 degrees F colder than the Daikin system (-5 F vs. 5 F). Both advertise that they heat down to -13 degrees F.
2. The Mitsubishi is more efficient than the Daikin per the SEER rating 26.1 vs. 20, EER 13.8 vs. 12.5, and the COP 4.24 vs. 3.90.

The main pros for the Daikin system (RXL12­ & FTX12):

1. While the warranties on the parts and compressor are both 12 years, the Daikin installer warranties the labor for 12 years while the Mitsubishi installer only warranties labor for 2 years.
2. The Daikin system is ~ $850 cheaper.
3. The Daikin installer is the same company that installed the Trane Furnace and AC and part of me would like to stick with the company we've already done business with and already comes out twice a year to service the furnace/AC.

I haven't been able to find any con

Have the Daikin WiFi Controller + Airbase app (Australia) for a few weeks now, stopped working outside the home network (using the Login (Not at home)) feature) a couple of days ago.

All works well within the home network, internet is still going strong, I can see from my router it stopped communicating at 5AM 14/12/2021 AEST.

Have emailed Daikin support but figured worth asking the community to see if anyone else is experiencing downtime.

Speculating, the controller must reach out to an external API it shares with the Airbase app in order to gain a public IP (or proxy to), something to that degree?

Today I had a Daikin heat pump with Daikin One+ smart thermostat installed. The physical thermostat as well as the app are both in Celsius, when I access it via Google Home, it is in Fahrenheit. My six Mysa thermostats and the Nest I just removed were all in Celsius. Is this a Daikin-specific issue? Any insight on how to remedy this would be appreciated.

Everything I’m reading about the Fit sounds great, but yet, I can’t seem to find many people to install them. I had a local HVAC company tell me they’re no good and break a lot. If that’s true, why can’t I find complaints online? I understand the relationship with the company is more important than the hardware, but the Daikin Fit could save me some money compared to the equivalent Trane or Mitsubishi.

Just got done with probably the most complex residential install I've done. It's a family moving from natural gas to electric with solar in Atlanta, GA.

For context, this is a home that was originally built in the ~1910s. The original portion is thick plaster with few, high quality windows. Later, a master bedroom, kitchen, and guest bedroom were all added on with modern construction, which was arguably worst quality than the original area.

When we arrived, they had 3 A/C units each with a furnace in a ~3000 square foot area: a 3-ton, 2 ton, and 1.5 ton. We did a Manual J due to all the additions, and found that the master bedroom unit, which was a 2-ton unit already in need of replacement due to mold growth, was oversized and could be 1.5-tons.

The guest & den had an older but still functional 1.5-ton system with a bad install (ductwork was laying on the ground in crawlspace) that we had to fix.

The living room, kitchen, and dining room were all on one newer 3-ton system, but the kitchen which has tons of windows and skylights had pretty bad temperature fluctuations due to undersized ductwork relative to the rest of the area (which is the older, plaster construction).

Original 3-ton unit (left) for kitchen, living, & dining. Original 1.5-ton unit (right) for guest & den. Didn't get a good pic of the master... but it was not a good install.

Although we only really needed to replace the master bedroom unit, at the family's instance, we ripped out the whole house’s HVAC and replaced it with a Daikin VRV Life heat pump system and four air handlers.

The outdoor unit is Daikin’s 5-ton VRV Life RXSQ60. The slim unit is replacing the three outdoor condensers they had.

First, we split the 3-ton system into two. The first is the kitchen & dining area which is now a 2-ton zone with a furnace. They wanted to move away from natural gas so this is the only furnace they have, which we needed due to the sheer heat loss and possibility of a cold winter.

[Kitchen and dining system is a 2-ton CXTQ24 A-coil on top of a 80k BTU DM96VC 96% efficient, the only furnace in the system.](https://preview.redd.it/tiao7p3e64x71.jpg?width=2887&format=pjpg&auto=webp&s=3d1ee73

Hey all, appreciate the advice I see around here.

I recently had a 9k BTU 17 seer Daikin heat pump installed. The indoor unit is on a wood-framed wall and the outside unit is sitting on a pad on the ground.

Whenever the fan is running on the indoor unit, I have a low-pitched and low-volume hum that resonates through the room. I am pretty sensitive to these kinds of noises, so I think I pick them up when others might not.

I had the installing company out to see if they thought it was within spec, they thought it was no problem. I just wanted to quickly gauge-- is this kind of hum inherent to these type of units, or should I be pursuing warranty work to get it remedied? Like I said, I am sensitive to these noises so it bugs me when it might not bother someone else at all, but if it's normal I will just deal.

I have never had a minisplit before, but have had them in hotels, etc, and never noticed anything low pitched. However, those were in settings with more formidable construction likely. This is in an add-on room that doesn't have a whole lot of insulation or anything-- just wood framing, drywall, and stucco.

Thanks in advance for any advice, and thanks for what y'all do keeping us cool!

EDIT to add: The noise happens whenever the fan is moving, even just in fan-only mode. So, has nothing to do with the outdoor unit, line set, etc. It's all that inside fan.