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Thread: Technical difficulties
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05-04-2023, 05:21 PM #1
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Hey, I am new to : RE
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Technical difficulties
Hi all,
I have been working on a Carrier Primeline reefer for the past two weeks, however, I am unable to solve the problem.
Reefer model #69NT40-561-018
The system has a restriction, and the compressor runs in a vacuum after the three-bump start.
Controller alarm: AA28 - low suction pressure
replace filter drier, replaced all transducers: EPT, SPT &DPT
Replace EEV complete body and coil, replace DUV complete body and coil, replace evaporator temp sensor ETS1 and EST2
The controller interchange (on problem with the controller)
Thanks in advance,
KRampersad
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05-04-2023, 08:04 PM #2
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Site Moderator : and general nice guy
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Re: Technical difficulties
Controller closes the EEV because you already replaced all other possible causes (but why if you were not certain about the real cause/problem?)?
Seems very basic schematic...It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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05-04-2023, 08:23 PM #3
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Re: Technical difficulties
What does it do on the Pre-trip test?
Did you blow through the pipework with nitrogen to check for any restrictions while you had components removed?Interested to hear about opportunities to learn - linkedin.com/in/s34nf
