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Webasto trips breaker on heat mode

Post
Admin

Steve Pooler

posts 1127

10:06 am February 7, 2011

Ed D said:

Steve

 

My boat is on the Saint Johns river at Julington Creek Water temp is 52/53 degrees My boat is a 32 FT Hunter Vision 1989

Below is an update of my a/c heat mode weekend

Saturday…I take it this is a copy & paste to someone name Aaron…Maybe the Webasto rep ?

D- Picked up some 5" tubing returned to the boat , removed the ducting at the unit and attached a 14" piece to the 5" collar to divert the air flow from the unit Restarted unit at 12.30PM with high fan setting…Good plan…

 
E- Sunday 9.00 Am system down breaker tripped…I have never have asked but what is your thermostat setting for temp ?…How warm is the cabin actually getting to ?…I know you don't know when you are gone but that t-stat setting should be the limit.
 
F Restarted Sunday 9.30am on Hi  fan  speed spent measured the first five cycles Unit running at start  30/32 amps avg running draw through all cycles ranged from 12.8/ 1.4.8 always building as higher over the time under compression of each run…What do you mean by compression of each run and how high does the amperage get before it cycles off ?  I also noticed that the average heat on cycle was 4/5 minutes and the fan only cycle was four to five minutes Left the boat at around 11 am…This is where I would like to know what cabin temp is…Is the unit cycling on T-Stat temp setting, or is it cycling on the overload as I started to get into on my last post…I know you don't know, but it would help us to know if it is in fact getting to the set temp.
 
G-Returned to the boat at 6.45 pm unit off breaker tripped  I again restarted this time in med fan to see if by doing this the fan cycle only could be lengthen by slowing same of the cool air in the fan cycle only and moved the short 5 in tube to again a few degrees more away from the direction of the unit  Ran for two hours checked ongoing  start amps ,rum amps and volts  Start amps 29/32 run amps 12.8/14.6  Volts 109.9 to 116.7 through all cycles
running during my two hour stay
 
H-Returned to the boat at 6.30 am today Monday unit off breaker tripped short 5" piece of tube had moved , Restated re secured the tube to divert more air away for the unit Ran through 3 cycles high fan  amps start 29/31 run 12.6/14.8 Volts 112/113 . Then I put in auto fan mode and when it recycled
the fan went to med speed instead of high before the compressor went on then when the compressor engaged I watch the amp meter climb to 46/47 but the breaker held and the unit went on This high amp was a little different than the ones of the past it did not slow down the pump and was very quick I will check unit on the way home at 5.30/6.00 PM
 
Arron on all of the cycles I put my fingure on the condensor and foung without question that on each and evey cycle it was about the same tempereture to the touch as the frame work around it , warmer that the than the condensor tubes but much cooler than when heating…So that we know what you are talking about (there are not really 2 condensers as you describe) one coil is an evaporator, and one is a condenser but they switch duties from heat to cool so it may be better to describe them as Air Coil & Water Coil to keep from getting confused.
 
Also my lowest voltage on all of these test was 109.8 for a brief moment
 
It seems that the unit will run longer in high fan mode but not for more than 13/14 hours…Like I said earlier…It shouldn't be a time thing…It's a room temp thing in heat mode…What is the cabin temp when it shuts off or trips the breaker…If you don't know because you have to leave…Use the T-Stat as your limiter…Find the highest setting it will stay running…This can give us a better picture…
 
I do not know waht else I can do to check the unit
 
 
Ed
Steve~

Member

Ed D

posts 10

10:37 am February 7, 2011

Steve

Again thank you so much

Paste Webasto Rep

Temperature is set for 75 degrees

Cabin reaches 80 degrees then goes in to fan mode

Amps reach a high of about 14.6 when compressor and fan high and pump running

Original start amps between a low of 29 to a high of 33 when I have been there to test

Re Breakers Origiannl I had a 20 amp breaker and the original unit ran all day long on air (installed in August) then after I read the install directions  once again and noticed they Webasto recommend a 40amp fuse this is why the main 30 amp is tripping

When I talk about temperature this is on the air coil It gets real hot while running in the heat mode (compressor running)  and drops in temperature to the finger touch

One more point

All of my wiring is 10 gauge right from the dock outlet to the unit

 

Steve

Thank you again

 

Ed

Ed

 

Member

Ed D

posts 10

10:40 am February 7, 2011

Steve

 

Sorry on more point The display panel shows no error messages I am familiar with the messages

 

Ed

Admin

Steve Pooler

posts 1127

11:09 am February 7, 2011

Ed D said:

Steve

Again thank you so much

Paste Webasto Rep

Temperature is set for 75 degrees

Cabin reaches 80 degrees then goes in to fan mode…Ok…There's the problem…That system with lower air flow will not run in heat mode @ 80 degrees…That's warmer than I'm sure it's designed to operate & why it trips breakers…Do you need a 80 degree cabin ?…Likely not I'd think…

Also interesting why the T-Stat is not shutting it off at 75 degrees if thats what you have it set for…Does the compressor start as soon as you turn on the breaker ?…If so…Talk to your Webasto guy about a control problem….Again I am not familiar with their control, but it seems you may have a stuck relay or triac (electronic relay) that is not letting the compressor shut off when the cabin is to the setpoint temp of the control…All this high amperage starts & running could have caused the relay/triac to fail, and it's either cycling on the high pressure switch, or the compressor overload…I suspect it's cycling on the overload from your description…

Don't leave it running unattended if the compressor comes on as soon as you turn on the breaker…It will eventually burn itself up….If you need heat till the repair parts come, just heat the cabin to a comfortable temp & shut it back off at the breaker till it gets chilly again…

Also ask the Aaron if the control has fault protection/s…If not…I would not leave the A/C running unattended at all…

Amps reach a high of about 14.6 when compressor and fan high and pump running

Original start amps between a low of 29 to a high of 33 when I have been there to test

Re Breakers Origiannl I had a 20 amp breaker and the original unit ran all day long on air (installed in August) then after I read the install directions  once again and noticed they Webasto recommend a 40amp fuse this is why the main 30 amp is tripping

I guess if you were using a fast blow fuse instead of a breaker, 40 amp would be ok…I'd prefer to see you go back to a 20 or 25 amp breaker so that the A/C does not trip your main breaker…You need your charger & such for bilge pumps….

When I talk about temperature this is on the air coil It gets real hot while running in the heat mode (compressor running)  and drops in temperature to the finger touch…The air coil is supposed to get hot when the compressor is running (that's where you get the hot air discharge from) but it cools right off as soon as the compressor shuts off…The water coil will get cold in the heat mode when the compressor is running…

One more point

All of my wiring is 10 gauge right from the dock outlet to the unit

 

Steve

Thank you again

 

Ed

Ed

 


Member

Ed D

posts 10

12:28 pm February 7, 2011

Steve

 

Again thank you so much I will continue with Webasto to resolve this issue Couple of points I would like to clarify I set the temp to 75 degree the units runs until the temp hits around 79/80 degrees then compressor shuts off  and the fan continuous to run Then once the temperature drops below the set 75 degree the cycle starts all over again generally in 4/5 minutes

 

Also the compressor does not start right up when I turn the breaker back on the system starts in with the fan running , then the pump then the compressor a normal cycle

 

Steve thank you so much you have been extremely helpful in aiding my understanding  of marine AC  I mentioned the above for future refenence should you get a similar situation form another user in the future

 

Ed

Admin

Steve Pooler

posts 1127

12:43 pm February 7, 2011

Ok Ed…If the compressor does not run with the control off & the breaker on…Then it should be ok…

You may want to ask about calibrating that control for proper temp…

If set at 75…It should cycle off at 75 and come back on in heat around 73…

In cooling it should still shut off at 75, but come back on at around 77….

 

Anyway…I would expect that system to trip at 80 degrees cabin temp in heat mode…Most heat pumps are at their limit at that temp.

 

Please let us know how it all ends up  Cool

 

Steve~

Member

Ed D

posts 10

12:53 pm February 7, 2011

Steve

 

I will be sure to let you know the final outcome

 

Thanks

 

Ed 

Member

Ed D

posts 10

4:53 pm February 15, 2011

Steve

 

I would like to have a quote on a 16000 btu unit vector unit to my email Delorme@att.net   I live in the Jacksonville Florida area

 

Ed

Admin

Steve Pooler

posts 1127

10:15 pm February 15, 2011

I will send it Ed…

But what happened ?

I'm sure others might like to find out…But me included…

 

Steve~

Member

Ed D

posts 10

2:09 pm March 9, 2011

Hi Steve

 

 

Sorry for the untimly delay Travelling   Ok here is the end of the story for now I installed an additional supply of 50 sq inches giving me a total of 100 sq inches and double check my ducting and tightened it up a bit  Four the last three weeks the unit has run constantly set at 74 degrees on heat mode with temperatures i dropping to 42 degrees in the evening So far so good  We will see what happens next Winter when the water temp drops back to 45degree For now all ok <img class="sfsmiley" title="Smile" onclick="sfjLoadSmiley('sf-smile.gif', 'Smile', 'http://marine-ac.com/wp-content/forum-smileys/&#039;, 'Smile', '1');" src="http://marine-ac.com/wp-content/forum-smileys/sf-smile.gif" alt="Smile" />

 

Ed


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