truma hws 240v tripping out

Submitted: Monday, Oct 07, 2013 at 09:54
ThreadID: 104615 Views:4658 Replies:6 FollowUps:0
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truma hws trips out safety switch when 240v turned on.Any ideas on cause? Have tried different sockets same result. It is in a mongrel position in cupboard next to bed. have looked a previous threads but couldn't find one for this problem.
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Reply By: wombat100 - Monday, Oct 07, 2013 at 10:28

Monday, Oct 07, 2013 at 10:28
Have you taken the external 'cover' off ??

AnswerID: 519304

Reply By: Robin Miller - Monday, Oct 07, 2013 at 10:29

Monday, Oct 07, 2013 at 10:29
Hi Raincloud

It could trip out for a couple of reasons , one being that the HWS is simply faulty and has an electrical leakage problem.
This can be tested for - better left to an electrican unless your into that stuff.
(They can also check that the actual saftey switch trips at the right point)

Another reason might be that its within its ratings but still leaks a little electricity.
And this leakage along with other devices on the same circuit can combine to trip it out.

Two things you can do to get more data are ->
A/ check that it still trips with nothing else on that circuit.
(including intermittant switch on devices like fridges)

B/ How long does it take to trip and when it does and you reset it does it trip again in the same time.
I have seen some things that trip out several times before staying on.

Robin Miller

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AnswerID: 519305

Reply By: Notso - Monday, Oct 07, 2013 at 12:15

Monday, Oct 07, 2013 at 12:15
I and a couple of friends have had this problem and you'll find it is a fault in the heating element.

They don't leak enough to cause a overload trip but will throw out the Core Balance device (Earth Leakage).

You'll need a new element about $27.00 the last one cost.

Easy job to do but should really be done by a Lec Lec!
AnswerID: 519308

Reply By: The Bantam - Monday, Oct 07, 2013 at 12:26

Monday, Oct 07, 2013 at 12:26
All hot water systems will eventuially have some sort of heating element failure due to corrosion.

Mostly in our homes they are not run on earth leakege breakers, so the first you know is there is no hot water, because the element has failed completly.

AnswerID: 519309

Reply By: oldtrack123 - Monday, Oct 07, 2013 at 12:28

Monday, Oct 07, 2013 at 12:28
Has the HW system been left unused on 240V for quite some time??[weeks /monthhs]??
The element insualtion can absorb a small amount of moisture at the end qonections which can allow sufficient electrical leakage to occur to trip the RCD

The Element may not be actually faulity, as this is common even with new elements

Will it run on gas or does it still trip the RCD?
If it will run on gas try that for say a dayor two,, that MAY be sufficient to dry out the electric element

Going any further than that requires a qualified electrician
AnswerID: 519310

Reply By: raincloud - Monday, Oct 07, 2013 at 17:00

Monday, Oct 07, 2013 at 17:00
yes it runs ok on gas. will go with an electrician although he will have to be small and flexible to get at the hws!!!
AnswerID: 519330

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