[andcro]

Re: SMV53M00gb/21 not heating water

Just double checked – you are spot on, 14k from the left to middle – 14k from the middle to the right pin – 28k across the outer pins.

Damm! Hoped that might have been the problem.

[andcro]

Re: SMV53M00gb/21 not heating water

I checked the continuity on these – but I’m not certain of what it should be –
The 3 pin Grey ribbon cable has only continuity across the middle and right connector at 14kohms- I briefly got 28kohms across one of the other combinations – but I’m not sure if this is right or not.

[andcro]

Re: SMV53M00gb/21 not heating water

The connections look the same – did you find out what the smaller connectors on the right were for?

I wonder if thats the NTC?

[andcro]

Re: SMV53M00gb/21 not heating water

I’ve continuity tested the wiring between the control module and the heat pump – all good. I realise there’s plenty on the control module to go wrong so I can’t test all that.

It’s the NTC’s I’d like to locate – I’d come to the conclusion they must be in the heat pump assembly, but it’s only my process of elimination.

If it was newer I’d take a punt – but it’s about 8 years old and I feel I need to be careful throwing parts at it – it could soon exceed the price of a new one.

Appreciate you guys helping.

[andcro]

Re: SMV53M00gb/21 not heating water

Thanks Dave – so, sounds like replace the heat pump assembly then?

[andcro]

Re: SMV53M00gb/21 not heating water

Well – I pulled the relay and tested it on the bench and it works fine, so this leads me to think it could be that it’s not getting the instruction to heat.

Gutted really as found a supplier who were really helpful in matching a new relay.

Is the thermostat built in to the heat pump on these? I can only find 2 other sensors on the diagrams – one is a turbidity sensor and the other I can’t tell – perhaps water level?

[andcro]

Re: SMV53M00gb/21 not heating water

Thanks Martin.
I found the relay details – but stopped short of unsoldering it and testing it as it needs 240v to switch it (chickened out!) – sounds like I might have to bite the bullet and do it.

Any suggestions on where to buy the relay if it is duff?

Thanks

Andy

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