@Xulfiqar Sir need your help. My old no frost refrigerator compressor is short. Its dead right?
I have been using stabilizer with it even though the stabilizer is good in terms of features e.g. stepping up/down, OC OV protection etc but since start it always behaved oddly meaning it would randomly step up and down the voltage quickly for some time even though input side seemed stable as per analog voltmeter of stabilizer itself, inverex UPS digital display and a DMM. All three devices show stable voltage when the stabilizer relays are clicking. I don't have oscilloscope to confirm if input voltage is fine or not so any suggestions regarding this?
Now coming to refrigerator issue, what happened was that the other night stabilizer was constantly stepping up and down and also randomly would cut off the output. I thought its the stabilizer issue and since voltage was 220 on UPS display so i plugged in the refrigerator directly to wapda. It ran for the night and next day at around 1PM, there was smoke and burning smell so my wife turned it off. I came back home and checked the compressor N and L with DMM and DMM was showing a short. I think the compressor overheated and the motor windings got short causing smoke and burning smell from other wires. The overheating could be due to bad refrigerant as this compressor was changed 5 years ago and you know the quality job electricians do here.
Its a very old fridge so i don't plan to spend on buying another compressor for 10k that too with no warranty so i am planning to buy a new fridge. The point of asking your opinion is that what do you think would have caused all this mess? I want to rule out that there is no problem in input (WAPDA) so new fridge will not see same fate. Kindly note that this house i am living in is single phase so other appliances never had any problem since last 3 years(Microwave, 1.5TAC, UPS, Samsung auto washing machine, water pump) so i suspect the stabilizer and compressor are to be blamed for what happened.
