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Heat pump with open start circuit

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dtran.mgmt

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Discussion starter · #1 ·
Hi
Newbee here. I am servicing a heat pump condenser model Direct Comfort DC-DSZC160601. It has been running ok for about a year but the problem started few days ago during the heatwave in the area. The condenser fan and compressor started about a second then shut off. According the manufacturer, the error code 06 indicates an open start circuit and possible causes are compressor start winding is open, failed run capacitor, faulty run capacitor wiring, compressor not properly wired to control, faulty compressor wiring. I checked the capacitor and it' s fine. I also checked all the connections and they are OK. How should I check for the other possible causes?
Thank you in advance for any help
 
#6 ·
That is a job best left for a professional to determine. Misdiagnosis can cost you a lot of money.

Site rules prohibit us from providing DIY help here.


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#7 ·
I believe you are a new tech. You had the problem pumping down a unit earlier. If the compressor overheats it might give you this symptom. If the compressor is hot, remove the wires at the compressor terminals. Check ohms to common, if it’s an open circuit, run the garden hose on it until the thermal overload closes and retest.
 
#8 ·
Time to apply for professional member status then it sounds like. It’s an easy process. Just get that post count up. Having that status will help you greatly because we can provide you with all the technical details you need. Until then we are limited with what we can say.

In your other post mentioned above, it sounds like you created a bomb without even knowing it. You got lucky and happened to be working on a unit that had internal protection that saved you from rupturing a pipe with over 600psi. This is dangerous equipment that you are working on and the information that we can provide you would be very beneficial to you.

Why don’t you start increasing your post count by letting us know what your employer thinks the issue might be?


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Discussion starter · #11 ·
I am an HVAC licensed contractor under the state of California. I just don't practice much. I have different job and will help family members and friends when they have problems and issues with HVAC systems. Anyway the dual capacitor for heat pump has the value of 40/5 uF. The actual reading for the fan is right on at 5 uF and 32 uF for the HERM. It is not a big deal right?
 
Discussion starter · #12 ·
Dear Ksefan
The unit mentioned in this post is different than the system with the pumping down issue. The problem I have with this heat pump unit is when I set the thermostat to cooling, the fan and the compressor just run for about a second then shut off and therefore, there is no overheat.
 
#13 ·
dtran.mgmt said:
I am an HVAC licensed contractor under the state of California. I just don't practice much.
Click to expand...
Excellent, you are almost there! Send off your certification to admin so they can verify your credentials.

Let’s answer some more questions to get that post count up :) you’ll have your professional status in no time!

What do you see happen to the needles on your gauges when you run the compressor?

Are you guessing that it’s not thermal safety or have you verified that? If you verified that then why method did you use to do so?





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#14 ·
All capacitors have a toletance from the manufacturer. Typically its 5 or 6% whatever the rating is of the capacitor. I think you said you had a 40 or 45 and you read 32 uF (microfarads). That would be out of the 5 or 6% tolerance. I have seen units still running in similar conditions; I dont think this is your problem but I would recommend going ahead and changing it.

When you say the unit stopped within a second; are you talking a literal second or did it run for a few and stop?

Need more info.

Did you have your gauges installed?

Do you have a clamp on amp meter? If so, have you checked your amperage to see what you are drawing?

Breaker not tripping correct?

When you say unit stops running, is the contactor staying pulled in?

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#15 ·
What % do you consider to be ok. I go with 5%
dtran.mgmt said:
I am an HVAC licensed contractor under the state of California. I just don't practice much. I have different job and will help family members and friends when they have problems and issues with HVAC systems. Anyway the dual capacitor for heat pump has the value of 40/5 uF. The actual reading for the fan is right on at 5 uF and 32 uF for the HERM. It is not a big deal right?
Click to expand...
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#16 ·
With enough other mild problems that could do it. I would not totally trust a meter only test anyway. Sounds like it is staying at locked rotor amps till it overheats.
Harris&harris said:
All capacitors have a toletance from the manufacturer. Typically its 5 or 6% whatever the rating is of the capacitor. I think you said you had a 40 or 45 and you read 32 uF (microfarads). That would be out of the 5 or 6% tolerance. I have seen units still running in similar conditions; I dont think this is your problem but I would recommend going ahead and changing it.

When you say the unit stopped within a second; are you talking a literal second or did it run for a few and stop?

Need more info.

Did you have your gauges installed?

Do you have a clamp on amp meter? If so, have you checked your amperage to see what you are drawing?

Breaker not tripping correct?

When you say unit stops running, is the contactor staying pulled in?

Sent from my SM-N950U using Tapatalk
Click to expand...
Sent from my rotary telephone using Tapatalk:)
 
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#17 ·
Does Californicate have a BS license :grin2: I'm talking about that brown smelly stuff running out a bulls butt.. I would hate to have this so called AC tech/contractor on my payroll
 
#18 ·
I saw a couple techs asking the salesman at a local supply house for a manometer and they didn't know the name of it or how to use it so the salesmen who has never used one before was trying to explain to them how it is used. And the reason they needed it was they needed to check static for a warranty application. I thought it was sad that a large well-known Local Company would not train there techs enough to even know how to check static.

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Discussion starter · #19 ·
Hello Harris
I went ahead to replace the capacitor since it is the only possible cause in my case and that fixed the problem.
Thank you for all the inputs and help
 
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