Hi Guys
Me again with wierd problem. Turned up to a call out freezer not running effieciently got to test condensing unit as was showing temp at start of deefrost -18. However after flicking on and off real temp was -12. Started checking condensing unit noticed bottom of condenser cool as well as drier. Carried out pump down test condensing unit was looking fairly new as well as evap. It was pumping down to 0 psi and stood there wasnt pullong vacuum. I recovered all 404a , carried out hp test, changed drier evacuated below 1 torr and charged to full site glass. I charged less than recovered by about 500g. Whilst testing i noticed half evaporator frozen and half not. Anyhow i tought i do one more pump down test before leaving site so i fully forward sit reciever rota lock and was waiting while it pull down to 0 psi and all of sudden sparks came out of box on the compressor where all 3 phazes are coming. I reset braker turned it on and same thing happend. I have never seen something like this. It was copeland compressor scrool i think. I quoted compressor and new TEV. Will go soon to change it just wonder what could cause compressor to pop out and was it the problem in the first place. I am going grey and i was scared that they will blamee for causing fault but likely they where fine with it.
Many Thanks hopefully i will learn something again from those who have more expierience.
Me again with wierd problem. Turned up to a call out freezer not running effieciently got to test condensing unit as was showing temp at start of deefrost -18. However after flicking on and off real temp was -12. Started checking condensing unit noticed bottom of condenser cool as well as drier. Carried out pump down test condensing unit was looking fairly new as well as evap. It was pumping down to 0 psi and stood there wasnt pullong vacuum. I recovered all 404a , carried out hp test, changed drier evacuated below 1 torr and charged to full site glass. I charged less than recovered by about 500g. Whilst testing i noticed half evaporator frozen and half not. Anyhow i tought i do one more pump down test before leaving site so i fully forward sit reciever rota lock and was waiting while it pull down to 0 psi and all of sudden sparks came out of box on the compressor where all 3 phazes are coming. I reset braker turned it on and same thing happend. I have never seen something like this. It was copeland compressor scrool i think. I quoted compressor and new TEV. Will go soon to change it just wonder what could cause compressor to pop out and was it the problem in the first place. I am going grey and i was scared that they will blamee for causing fault but likely they where fine with it.
Many Thanks hopefully i will learn something again from those who have more expierience.