I have a little Clarke Shhh 3/9 quiet compressor. I bought it as faulty, with a burned-out motor start relay. I have a replacement relay, but can’t get the compressor working.
These compressors use freezer motors. They have standard freezer-type electrical connections; i.e. 3 connection pins in a triangular formation on the side of the motor housing. I have identified the Common, Run and Start pins.
The motor seems OK; it runs correctly if I connect the Common and Run pins directly to power and brush a negative wire against the Start pin to get the motor running. However, when I connect the starter relay and capacitor the motor will not start. It will hum gently (until the thermal protector cuts power), as it does on the aforementioned manual test prior to brushing a negative wire against the Start pin, so the problem seems to lie with the start procedure. I therefore presume that either my attempts at connecting the start relay and capacitor are at fault, or the capacitor (and/or possibly the new relay) are faulty.
When I got the machine the original relay was mostly smashed and various wires were disconnected. In addition, the new relay (obtained from Clarke) is a slightly different design. I don’t therefore have the previous installation to use as a connection guide. Does anyone know (or are any owners prepared to unclip the cover from the connection block of their own machine to check) how the relay and capacitor should be connected?
I would also appreciate advice regarding the start relay and capacitor;
1/ The relay has 3 connections, two of which have continuity when at rest. When power is run through the first two connection they maintain a continuous circuit, whilst the third connection shows momentary power (checking with a multimeter) then reverts to an unpowered state. Is this behaviour correct?
2/ Does anyone know how to test the capacitor? Is it possible to do so using a multimeter?
Thanks.
These compressors use freezer motors. They have standard freezer-type electrical connections; i.e. 3 connection pins in a triangular formation on the side of the motor housing. I have identified the Common, Run and Start pins.
The motor seems OK; it runs correctly if I connect the Common and Run pins directly to power and brush a negative wire against the Start pin to get the motor running. However, when I connect the starter relay and capacitor the motor will not start. It will hum gently (until the thermal protector cuts power), as it does on the aforementioned manual test prior to brushing a negative wire against the Start pin, so the problem seems to lie with the start procedure. I therefore presume that either my attempts at connecting the start relay and capacitor are at fault, or the capacitor (and/or possibly the new relay) are faulty.
When I got the machine the original relay was mostly smashed and various wires were disconnected. In addition, the new relay (obtained from Clarke) is a slightly different design. I don’t therefore have the previous installation to use as a connection guide. Does anyone know (or are any owners prepared to unclip the cover from the connection block of their own machine to check) how the relay and capacitor should be connected?
I would also appreciate advice regarding the start relay and capacitor;
1/ The relay has 3 connections, two of which have continuity when at rest. When power is run through the first two connection they maintain a continuous circuit, whilst the third connection shows momentary power (checking with a multimeter) then reverts to an unpowered state. Is this behaviour correct?
2/ Does anyone know how to test the capacitor? Is it possible to do so using a multimeter?
Thanks.
