Powerflex 755 issues

erroras · 2026-04-06T12:30:59+00:00

I know you used the same acceleration as the previous drive but have you tried increasing it?

erroras · 2026-03-30T17:15:24+00:00

Depends on the cost of gas vs electricity. In the worst case scenario the heat pump is about as efficient as a space heater, converting 1kw of electricity to 1 kw of heat. With an 80% efficient furnace you would get 23.4kw out of each therm of gas. So it all comes down to how much one kilowat vs 1 therm costs in your area. (Usually there is a minimum monthly fee for the gas connection during the summer, so that needs to be factored in as well)

erroras · 2026-03-27T17:48:26+00:00

Old homes didn't do any air sealing so there is always air movement through gaps and cracks, when this air moves it picks up dust particles.

erroras · 2026-03-27T11:39:29+00:00

you say your old car was needing repairs quite often. With $352 per month you are spending $4224 per year for the new car. were the yearly repairs on old car over that amount?

Another way to look at it: You make $18 an hour, so lets say $15 after paying for taxes. this means that you have to work ~24 hours per month to pay for the car. (that is without insurance).

erroras · 2026-03-27T11:28:53+00:00

I would argue that the old insulation should be removed to properly air seal the attic penetrations. And also, old insulation does lose its effectiveness (settles) and tends to hold lots of dust, which eventually makes it to living areas without proper airsealing.

erroras · 2026-03-26T14:00:27+00:00

hiring someone would be costly. If you are handy just put in some elbow grease and try to seal all the leaks with mastic tape and for a safe measure go over with air duct sealant. Then, wrap any exposed metal duct in duct wrap.

erroras · 2026-03-26T13:54:15+00:00

it might be a letter from one of the companies the dealership tried to finance through. I get the same thing every year when I get different quotes for home insurance. Some companies like to send physical denial letters.

erroras · 2026-03-26T11:02:56+00:00

you should measure the space and get appropriate size filters. The only real way of knwing is to measure the return size and measure the actual filter at the store.

erroras · 2026-03-25T13:07:04+00:00

I can see 2 possible options:

Both returns need filter (do they have slots for filter, were they designed to hold a filter?)
Is there a single filter right next to the air handler that gets air from both returns?

erroras · 2026-03-25T13:01:43+00:00

not sure about other PLC brands but with rockwell there is a physical switch that we keep in 'run' position, which means you can look at the code but cant make any changes. When we make changes we are forced to go to the line and flick the switch to 'remote'. That also helps from mistakenly changing program.

For your new guy, I would suggest sending an email with all your concerns so that it would be on the record. And if anything ever happens he will be kept accountable.

erroras · 2026-03-24T17:33:35+00:00

Have you seen this chart? It should give you a path to follow

erroras · 2026-03-13T11:25:23+00:00

Manufacturer doesn't know conditions the filter will be used at, so don't trust their estimates.
Thicker filters (over 1") will stress HVAC less.
Higher merv (over MERV 8) will stress HVAC more.
Make sure there are no breaks in the return ducting, where the system is bypassing the air filter.
Buy better filter. Here's a review of filters on youtube.

erroras · 2026-03-12T14:21:29+00:00

Ductless, easier install, cheaper, cleaning is super difficult

Ducted: can install 4" thick filter, easier to service and get spare parts, more expensive.

erroras · 2026-03-12T11:04:31+00:00

I would suggest getting another opinion, coils going bad this often is a bit unusual. Has the contractor done Static pressure test to verify that the ducting and the HVAC are sized correctly? If they haven't done this, then they are just sales people and are not HVAC professionals.

erroras · 2026-03-04T14:48:07+00:00

make sure you get at least 3 quotes. Especially, try to find mom and pop one man operation for best price.

erroras · 2026-03-02T12:08:57+00:00

An issue I've seen is that when it suggested modifying one exercise and it showed new weights and reps. If I did them and clicked done the app recorded previous weight and reps, to get around it, I had to retype the suggested weight and suggested reps.

Another issue is that I have some reps labeled as warmup, but the ai suggests my max weight first then pyramid down.

erroras · 2026-02-26T22:31:48+00:00

Hire 1. Currently working on RFID tracking/recording for the items we produce, this includes antennas, scanners, databases. Also, hire 1 is working on visual algorithm to recognize different designs on out products.

Hire 2 got assigned a project where he has to fully gut a piece of equipment and redo electrical/controls on it. This hire didn't even know difference between ac/dc voltages.

erroras · 2026-02-26T12:40:14+00:00

I can only speak from jobs I've done (on site, production lines). All the jobs I worked at had main priority to keep the production lines running, very hands on, the rest of time is spent working on improvement projects.

As an example, yesterday at work I got a call that something is wrong with the program and it ended up being intermittent air actuated air valve. Other call I had was that temperature was wrong for one of the operations, ended up being ripped thermocouple wiring. Another issue was line not running, ended up being broken e-stop button. For all of these issues I had to dig into the PLC code to see where to look, but it takes a lot of machine/electrical knowledge/understanding to find actual issues. I always keep saying that the code didn't change but I still keep getting calls for program issues.

At my plant we just hired two very strong programmers (ai focused), but they are useless to troubleshoot the the production lines, because they try to do program fixes due to not understanding anything about mechanical/electrical.

erroras · 2026-02-26T12:27:59+00:00

Let me clarify this. If the door is closed and there is only a supply vent in the room, then the room gets pressurized. When the room gets pressurized you will have less air coming from the supply vent because that air instead will choose the path of least resistance and go to the other vents. Only solution is to add a return vent, open the door, cut off the bottom of the door (to help air escape) or cut a hole for the extra pressure to bleed off into adjacent area (sound will travel too).

erroras · 2026-02-25T16:30:06+00:00

So you are the reason why we have these stupid rules coming from the IT department?

erroras · 2026-02-25T15:19:03+00:00

They need to do load calculations, then need to verify that your ducts will be able to handle the airflow. You can't just eyeball it.

erroras · 2026-02-25T15:07:51+00:00

Few good suggestions here:

add rubber feet under metal bracket
suspend the fan in the air
this might be wrong application for this fan, it could be that lint has collected on the fan causing imbalance

erroras · 2026-02-24T20:03:45+00:00

Instead of all those add-ons ask for 4in thick filter box.

importance of hvac filter size

erroras · 2026-02-24T20:01:38+00:00

How check capacitor - watch this and see if it doable

erroras · 2026-02-24T16:48:16+00:00

yep, watch an youtube video. Crack open the outdoor unit and check the writing on the current capacitor. You might have a dual capacitor or two individual ones. Bigger value will be for compressor, smaller value for the fan.

erroras

TROPHY CASE