Hi
its my first time posting on here or in any forum so apologies if im in the wrong thread or doing anyhting wrong if you could point me in the right direction it would be greatly appreciated
a bit of background im fully qualfied electrican registered with napit and just need some clarification from someone more knowledgable than me on this regarding compressors
i recently had an call out to a repeat customer to look at a single phase external walk in freezer situated at the back of a resturant that had been tripping im not an refrigeration engineer which i told the customer but he wanted me to check the basics before calling out a specialist. when i arrived at the job the following day it was all working and the customer said they had been resetting the breaker everytime it tripped and it just stayed on after a while. They said it started tripping when the door was opened this had a contact switch for the internal light. upon checking the light fitting there was frozen water inside the fitting im guessing that in a hot day (walk in freezer outside) there may have been condensation forming that had made its way into the light fitting freexing and when it heated up the water melting hence causing the tripping the light fitting in question was just a cheap bulkhead with a bc E27 led lamp in it, (if there are any other reasons why condensation would be forming please advise)
i spoke to my whoesaler (cef) for something suitable and they provided an ip65 led bulkhead that was suitable down to -25 that was suitable
i replaced the old light fitting with the new one (siliconing the small rear entrance hole aswel as the two screw holes to seal) and powered back up after testing.
the compressor took a little while to kick in once the door was shut and from what i read on the manual of the unit it goes through a few checks before powering up.
fast forward three weeks later with no issues and i had a call from the customer saying the freezer had tripped at the breaker, unfortunately i was on holday and couldnt attend but was happy to do so once i returned.
uopn returning from holiday i contacted the customer to see if they managed to get the freezer sorted or if they needed any further assisance i was told that the company that came out had said the light fitting wasnt suitable for the freezer, condensation had got into the new light fitting which in turn had damaged the compressor which also needed replacing (which the company then proceeded to replace)
Please correct me if im wrong but i cant see how the short circuit of water in the light fitting could damage the compressor once the power had tripped, unless the breaker has been repeatedly turned on and off again by the customer due to constant tripping in a short space of time which in turn has led to the over heating/ damage of the compressor,
im not overly familiar with compressors but i was always taught they shouldnt be switched on and off frequently, my other thought was if the compressor was starting to need some maintenance work and with the freezer being situated outside on sunny days could it be struggling to maintain temperature resulting in condensation?
since the other company went to the call out my orginal light fitting has been disposed of so i cant check it for defects (i know condensation shouldnt have been able to get inside the fitting in the first place which is a concern which i will be looking into further via cef)
I am looking at compensating the customer to try make thins right but the cost of replacing these was £2000 (alot more for than my original bill i charged for replacing a light fitting) and id just like to know all the facts before i go down this route, if the fail of the compressor could be my fault? i admit water getting into the fitting would be attributed to me even though the fitting (on the spec sheet at least) should have been suitable for the location
any help would be greatly appreciated on this or if any one has been in this situation before as its a first time for me
its my first time posting on here or in any forum so apologies if im in the wrong thread or doing anyhting wrong if you could point me in the right direction it would be greatly appreciated
a bit of background im fully qualfied electrican registered with napit and just need some clarification from someone more knowledgable than me on this regarding compressors
i recently had an call out to a repeat customer to look at a single phase external walk in freezer situated at the back of a resturant that had been tripping im not an refrigeration engineer which i told the customer but he wanted me to check the basics before calling out a specialist. when i arrived at the job the following day it was all working and the customer said they had been resetting the breaker everytime it tripped and it just stayed on after a while. They said it started tripping when the door was opened this had a contact switch for the internal light. upon checking the light fitting there was frozen water inside the fitting im guessing that in a hot day (walk in freezer outside) there may have been condensation forming that had made its way into the light fitting freexing and when it heated up the water melting hence causing the tripping the light fitting in question was just a cheap bulkhead with a bc E27 led lamp in it, (if there are any other reasons why condensation would be forming please advise)
i spoke to my whoesaler (cef) for something suitable and they provided an ip65 led bulkhead that was suitable down to -25 that was suitable
i replaced the old light fitting with the new one (siliconing the small rear entrance hole aswel as the two screw holes to seal) and powered back up after testing.
the compressor took a little while to kick in once the door was shut and from what i read on the manual of the unit it goes through a few checks before powering up.
fast forward three weeks later with no issues and i had a call from the customer saying the freezer had tripped at the breaker, unfortunately i was on holday and couldnt attend but was happy to do so once i returned.
uopn returning from holiday i contacted the customer to see if they managed to get the freezer sorted or if they needed any further assisance i was told that the company that came out had said the light fitting wasnt suitable for the freezer, condensation had got into the new light fitting which in turn had damaged the compressor which also needed replacing (which the company then proceeded to replace)
Please correct me if im wrong but i cant see how the short circuit of water in the light fitting could damage the compressor once the power had tripped, unless the breaker has been repeatedly turned on and off again by the customer due to constant tripping in a short space of time which in turn has led to the over heating/ damage of the compressor,
im not overly familiar with compressors but i was always taught they shouldnt be switched on and off frequently, my other thought was if the compressor was starting to need some maintenance work and with the freezer being situated outside on sunny days could it be struggling to maintain temperature resulting in condensation?
since the other company went to the call out my orginal light fitting has been disposed of so i cant check it for defects (i know condensation shouldnt have been able to get inside the fitting in the first place which is a concern which i will be looking into further via cef)
I am looking at compensating the customer to try make thins right but the cost of replacing these was £2000 (alot more for than my original bill i charged for replacing a light fitting) and id just like to know all the facts before i go down this route, if the fail of the compressor could be my fault? i admit water getting into the fitting would be attributed to me even though the fitting (on the spec sheet at least) should have been suitable for the location
any help would be greatly appreciated on this or if any one has been in this situation before as its a first time for me