The 3 Pillars of Daikin Service Checker Analysis
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- เผยแพร่เมื่อ 16 ก.พ. 2023
- The 3 pillars of Daikin Service Checker Analysis. This video focuses on how to use the basics of refrigeration to troubleshoot Daikin Service Checker Data. Regardless the number, high or low, we can determine what is happening within the system and investigate at a magnified level as to the issue.
This TH-cam channel is not affiliated with Daikin or it’s entities. This is a channel focused on strictly customer product support of Daikin related products from other customers with similar experience with said products. Any content within this channel is solely the opinion of said person within the channel and should not be construed as “factory authorized” advice. Use the information within this channel at your own discretion. Always reference the appropriate Installation, Operation and Service Manual regarding the equipment you are currently working on.
Thanks Roman..... Best 20 minutes that I spent today!
Really good video . DSH is a new item I’ve been running into on VRV and Daikin applied equipment. This really helped me bridge my knowledge gap , thank you!
Brilliant information Roman. Thanks so much
Excellent video!
Looking forward to you sharing your knowledge related to data analysis checker. Thanks you.
The wait is over
Roman this is great keep the videos coming especially on vrv
Outstanding video and explanation
Hi Roman, this is brilliant. Thank you for the content. I started service checker analysis about a year ago when I started working at Daikin and it took me a while to get the hang of it. I've gotten alot better at it but this video hear made so much sense. Thank you once again. Keep the videos coming 💪
One other question, the parameters that you speak about is all in degrees Fahrenheit correct ?
Yes in ⁰F
Is he not talking about k so should still be the same amount if deg c or F ??
@@po65231r Hey mate, K doesn't relate to F at all, K is absolute C, so if a water chiller (for example) has 12C entering and 6C leaving water temperature, this could be expressed as 6K of duty (12-6). 0K = -273C (absolute zero), 273K = 0C, 373K = 100C and so on. Cheers.
More videos please. Good job 👍🏼
I thought VRV 3 and VRV 4 have different ranges in permissible values
No same ranges as they share similar compressors.
That's soo excellent thanks a million
Great explanation!
Glad it was helpful!
Great video
Great info 👍 👌
Thank you.
Bro got me locked in for the deep dive then only has two videos 😅😅
The wait is over
Trimaksih bos
Can we use this same method with all vrfs systems? Thanks in advance also great info god bless!
Great video! Thanks for sharing.
Are these numbers different when unit in heating mode? I always see outdoor coil iced up after the main eev, and from service checker, it shows the valve 3000 pls
The measurements discussed in this video are universal between all modes, however where we are measuring these temperatures changes. Measuring subcooling in cooling mode is using different temperature measurement locations than in heat mode.
@@RomanBaugh thanks, hope you could do a video the troubleshooting when unit is in heating mode. 🙏
Hi Roman, great video could you advise of these figures you refer to in deg C i.e. DSH range (27 to72), SSH range (3.6 to 32) & LSC range (11)
Fahrenheit my friend
Sorry I’m confused is discharge superheat calculated by taking Discharge line temp-Discharge sat temp or Discharge line temp-Liquid sat temp?
Hey Roman. When I’m using my service checker on a VRV 4. I have noticed the eev pulses have 2 sets of data. Eg it has upper heat exchanger eev pulses, and then upper heat exchanger eev US pulse. What does the US dictate? I don’t use it in my diagnosis, I’m just curious to what it refers too.
Yes there are two different sets, however do not us the (US) valve pulses as they are not for our market and will be misleading.
@Roman Baugh thanks legend. Appreciate it
How do we measure subcool on a vrv
I’ve got a total of 9 systems of 4X heat recovery units. We have had multiple issues and lost compressors. Your video made me dive deep into these systems. One system in particular is running a high DSH 90-100. SSH is within range no higher that 32 sometimes drops less in five. Subcool is within range. I did an oil differential across the suction line and was getting 7F then jumped up to almost 40F. Do you have any more info. Also where did you get the 30 modes local Daikin rep doesn’t have it.
Sounds like oil traps within the building. High DSH levels with normal range SSH and Subcooling means your compressors are low on oil. Sounds like piping errors or discrepancies.
Meaning there are piping rules broken causing oil to become trapped in the system.
Your local Daikin Rep will not have that list, as I translated it from Japanese. Daikin Japan is the only one with the list prior to now.
Thank you I’ll start looking at the piping.
But keeping them videos comming.
Can rebroadcast the video in metric please?? I mean in degree Celsius.
Also sensors and transducers. How to verify they work right
Without getting into the math, Daikin has two apps that can help you convert that. Daikin tech and Daikin services, it’ll convert dc voltage to pressure (vise versa) and temps to ohm (vise versa). Then get gauges or temp probes and see if they correlate.
1:34 - Where do you put your probes to get the numbers for calculating discharge superheat? My understanding of the discharge superheat calculation is discharge line temperature less liquid line pressure (converted to temperature). Is that right?
Discharge superheat is measured using discharge line temperature 6” down stream of compressor then subtracting it from liquid line temp converted to saturation temp. 180-110 = 70 DSH.
Are the examples shown, reflect a system running on heat?
Heat, Cooling, heat recovery it’s all relevant as long as you know the correct locations of where to measure these temperatures.
Are the temperature figures in Fahrenheit or Celsius? As I'm in the UK
Fahrenheit good sir
How does overcharge cause low oil in compressor?
Flushes out oil
System never runs the compressor over half speed causing velocity to be low not allowing refrigerant to bring oil back from the indoor units. Couple that with liquid flood back then compounds the issue removing any remaining oil from the compressor.
Hello Roman, could you put subtitles in Spanish? Thanks
I have a question are your Temps F or C?
Fahrenheit
Do you know the process of Daikin minisplit, how do they calculate evaporating temp and condensing temp. Since they do not have pressure transmitters. Only discharge probe, ev probe and condensing probes, and air thermistor probes. Do they calculate evaporating and condensing temperatures via the compressor load ampere, and also take into account the heatexchanger probes? Its bugging me for real. Hope you have somewhat of an answer.=)
Short answer is they don’t. Thermistor data is all that is used to control the motor speeds and valve pulses. At least that’s what is taught in the mini split class.
@@ryanbrown7134 Then how can they get correct sh and sc? Its been bugging me how are they actually know how to adjust the eev. Some of the data needed for correct sh, sc is unknown. They must use ampere drawn by the compressor too trying to get somewhat of correct ev pressure and condensing pressure... 😁
@@guuuuustaf It bothered me too when I first started working on them. They don’t monitor superheat or subcooling. They may have an algorithm that determines wet operation with compressor current and discharge temp but I doubt it. Even if they did, they wouldn’t tell us anyways. Other than the logic, mini splits are very simple units.
Haha okeey thank you for the answer=). may be therefore they often have two accumulator tanks beside compressor. Cause the sh cant always be 100%.They are indeed very simple. The logic as you say is the more tricky part.
@@ryanbrown7134
If the units don’t have the pressure sensor , it should have thermistor at the evap and at the condenser coil . These temperature will be used for evap temperature and condensation temperature instead pressure reading converted into sat temperature.
How long before you have to take this down?
Why?
Still up Scott 😂
@@RomanBaugh I only say that because there's been some other helpful daikin content that was taken down. I don't understand the secrecy. We as technicians need any tools we can get, thank you!!
VRV
DSH
Discharge SuperHeat
Discharge pipe temp - Tc ( condensing saturation temperature)
Range 27-72
Below range ( overcharge)
Above range ( low oil or low refrigerant)
SSH
Suction SuperHeat
Suction pipe temp - Te ( evaporation saturation temperature)
Range 3.6-32 (5-32)
Below range (wet- liquid refrigerant at compressor)(overcharge or bypassing refrigerant In system)
Above range ( low charge or restriction in system)
SUB
System SubCooling
Tc - liquid pipe temp after heat exchanger(s)
Range 11 +/- 3
Below ( undercharge or restriction )
Above ( overcharge or bypassing )
Unfortunately thats not the whole story, I will be making a video in depth of each item and all the intricacies that go with it.
@@RomanBaugh
Thanks Roman fantastic video, will help a lot.
Really looking forward of your next video.
👍🏼
@@RomanBaugh Watting
@@RomanBaughare these numbers for VRV3 and 4?
U sound like u think all techs have basic schooling in refrigeration theory.
You need to know the basics before diving into VRV. Like experienced in service on package units or split systems
@@epicone2449 looked for the dsh, sc and sh on a daikin fit heat pump couple days using the daikin btsc app. The symbols arnt matchin on the app. Reverted to just using to probes. Went after the dsh and sh in heating mode. Looked normal. Last tech suspected low charge after the tstat error history shows low pressure trip. Found the data wire was grounded at the equipment chasis and corrected it.
Excellent video!
Great video
Glad you enjoyed it