More unchilled happenings

Preamble

My fridge/freezer in my BKK apartment died. Possibly because I shifted it while it was on, possibly because it was old when I bought it, or it just overheated in this sweltering heat, that we have been having lately.

The fridge is an Electrolux ER 2290 D. The issue appears to be the compressor not starting, or continuing to run (if it does start). It can heard buzzing, and sometimes, it will start, but then stop running shortly afterwards. Various clicks can also be heard, as if it is trying to start, but it just doesn’t get enough of a “power kick” to actually start.

See also Just not chilling.

Useful video tutorials

This video goes through the usual testing procedure for the compressor terminals (Common, Start and Run) – testing the resistance of the three compressor terminal pairs to ensure that the sum of the resistance of two of them add up to the third’s resistance. It also introduces the Universal Starting Component Kit.

The title of this next video, seems to accurately describe the issue that I am experiencing.

There are two sizes of Universal starter packs (AKA 3 in 1 starter):

  • 1/12-1/5 HP for newer fridges
  • 1/3 – 1/4 HP for older fridges

It also mentions the usual positions of the three terminals:

commonstartrun

Common wiring colours:

  • Common – black wire
  • Run – red wire
  • Start – white (or yellow) wire

This next video is useful for the five most common refrigerator issues.

Circuit diagram

Taken from the back of the fridge

Circuit diagram for Electrolux ER 2290 D
Circuit diagram for Electrolux ER 2290 D

A closer inspection

What is strange with my fridge is that the compressor connector (see below) is only two pins (Start and Run), en lieu of the usual triangular three pin connector, with only the Run connector being connected, by a black lead coming from a Nakagawa NT0704M2MC, which appears to be a defrost timer. The Start connector is unconnected.

NT0704M2MC
NT0704M2MC

The Common pin is connected to a component with three terminals, manufactured by MRKK, part number MM3-20GCA 9254, with a red lead, coming from the NT0704M2MC, going to terminal 1, and terminal 3 being connected to the compressor’s Common pin. Terminal 2 is unconnected. The MM3-20GCA is the overload protection, as seen in the circuit diagram (above).

MM3-20GCA 9254
MM3-20GCA 9254

Upon further inspection, and comparison with the circuit diagram, it appears that the two pin compressor connector, with only one lead attached to it, is correct, and is the relay, made by Hitachi. It is probably this part that requires replacing. Upon it is embossed “S-3” and “>UP<“. The two sockets that correspond to the Start and Run terminals are labeled 3 and 2 respectively, with terminals 1 and 4 not having any actual pins to connect to.

I located this part in a backstreet shop, where the chap said he had one and that it would cost 300 baht. However, he then proceeded to, inexplicably, lose his temper, and said that it would cost 400 baht, if I thought about it. So I left him to his own musings, minus the potential 300 baht that he could have made.

Compressor terminal resistances

The resistances, between the compressor terminals, are:

  • Run – Common = 10.5 Ohm
  • Start – Common = 22.8 Ohm
  • Run – Start = 33 Ohm

Parts

The universal kit – Supco 3 in 1 Hard Start Relay Combo Kit for Compressors Relay Capacitor Overload, $12.74 + $16.34

NEW Start Capacitor,Compressor Relay, Kit 3 in1 FROM 1/12 TO 1/5HP 115V, $9.25

See also this page.

Update

After about a week of searching the local shops (I had encountered a filthy shop owned by a drunkard who tried to aggressively sell me a second hand replacement for 300 baht, whilst angrily telling me that if I left and then, later, returned the price would go up to 400 baht. Needless to say, I did not purchase the item from the gentleman), I located a replacement relay in this shop, near the corner of Pracha Songkro Soi 25, which is run by a very personable, and energetic, lady

<photo of shop>

The replacement relay was not an exact match, being a JAHWA 220MD2 / KV126, but close enough

However, after getting it home and testing it, while the new relay/connector works (the compressor started up fine but slowly died after about a minute or two of operation – the same as it did with the original Hitachi relay), it appears that the compressor is broken, rather than the associated control circuitry. The compressor does get incredibly hot, during the few moments that it runs, indicating a catastrophic failure.

The lady in the shop also appeared to have doubts that the original relay was broken, as it did/does not rattle when shaken.

 

 

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