Anybody got this?
Hums constantly when mains plugged in and on absorption, (possibly also on float)
Hums constantly when mains plugged in and on absorption, (possibly also on float)
Charger Hum
- Thread starter Folkranger
- Start date
Silver-Fox
LIFE MEMBER
What tune is it humming 
Sorry
Sorry
kevenh
Free Member
Hum is usually from a transformer. The hum arises through the vibration caused when the load current passes through the windings.
Unless it suddenly starts it'll be an annoyance only.
Unless it suddenly starts it'll be an annoyance only.
Lenny HB
LIFE MEMBER
- Oct 18, 2007
- 58,073
- 179,147
- Funster No
- 658
- MH
- Carthago Compactline
- Exp
- Since 2008 & many years tugging
Probably one of the chokes or transformers humming in the charger, not much can be done apart from replacing components in it.
Lenny HB
LIFE MEMBER
- Oct 18, 2007
- 58,073
- 179,147
- Funster No
- 658
- MH
- Carthago Compactline
- Exp
- Since 2008 & many years tugging
Folkranger I see you have a DL are you aware of the hinge problem?
www.motorhomefun.co.uk
Hymer Door Hinge Wear on Hymers from 2016 with Plastic Hinges
Since around 2016 Hymer have been fitting plastic door hinges to all doors & locker including the Habitation door. Most of us with these hinges have found excessive wear on the hinges. For the cheap plastic hinge, Hymer charge £120 each for replacements, extortion for a bit of plastic crap not...
www.motorhomefun.co.uk
Subscribers do not see these advertisements
Last edited:
Blue Knight
Free Member
I like your set-up; very impressive indeed 
Until recently we had the CBE system and they can make a proper racket from new so a light hum on your system is probably a normal event.
Until recently we had the CBE system and they can make a proper racket from new so a light hum on your system is probably a normal event.
OP
OP
I can switch it to off. That stops the buzz but unfortunately also shuts off the mains feed. Should I not be able to use mains without feeding the charger? It's currently buzzing away at 100% and on float.
OP
OP
Helps me sleep at night, don't have that problem through the day.I like your set-up; very impressive indeed
Until recently we had the CBE system and they can make a proper racket from new so a light hum on your system is probably a normal event.
Lenny HB
LIFE MEMBER
- Oct 18, 2007
- 58,073
- 179,147
- Funster No
- 658
- MH
- Carthago Compactline
- Exp
- Since 2008 & many years tugging
Worth having a word with Victron they may replace it.
OP
OP
At four years old?
Subscribers do not see these advertisements
It means your charger settings are a bit high, and constant charging occurs. The humming is normal, but if a little loud with little load, heat may be the cause. It should hum when 1/2-3/4 and full load, but at float small load should hardly hear it. I used to have that exactly multiplus model and mounted on rubber spacers. Your board acts like a resonator at the moment, and amplifies the hum, specially if it’s a well built enclosure .
Lenny HB
LIFE MEMBER
- Oct 18, 2007
- 58,073
- 179,147
- Funster No
- 658
- MH
- Carthago Compactline
- Exp
- Since 2008 & many years tugging
Worth a try.
OP
OP
Yes lenny, I've seen your post from when you so kindly advised me when buying in July. I think mine look OK for now but please add me to your list. Better safe than sorry.Folkranger I see you have a DL are you aware of the hinge problem?
Hymer Door Hinge Wear on Hymers from 2016 with Plastic Hinges
Since around 2016 Hymer have been fitting plastic door hinges to all doors & locker including the Habitation door. Most of us with these hinges have found excessive wear on the hinges. For the cheap plastic hinge, Hymer charge £120 each for replacements, extortion for a bit of plastic crap not...
OP
OP
I won't pretend that I anywhere near understand the electronics in this. I checked for heat and none that can be felt by hand. I was hoping the settings would be OK as the prior owner was in the business knew what he was doing. Yes it is screwed directly to the bulkhead.
OP
OP
The plot thickens. Wife said "coffee?" I said "of course". Kettle went on, buzzing stopped. Kettle off, buzzing still off (for the moment).
Subscribers do not see these advertisements
OP
OP
Didn't last buzzing back on. Just have to play some music.
The inverter is on a bracket like French style cleat at the top, with two screws at the bottom preventing it from lifting of the bracket. Try loosen up the bottom screws and put a paper spacer so it does not touch the board at the back. Maybe that hum is amplified by the board, or (possible) is in AES mode for power saving. When on AES the frequency is reduced to save power under a certain small load 30-40w. When the frequency is low the humming is louder.
without listening to it I can’t be certain. But worth a try with the spacer.
without listening to it I can’t be certain. But worth a try with the spacer.
OP
OP
Specific question. Is there a way to switch off charging while leaving mains supply to the van?
Yes with mk3 to usb you can disable charging, or as I suggested in my first post; lower your charging parameters and reduce absorb time. If they are set by the book, are 100% to high. I live with this equipment.
What are you powering with this set up, Milton Keynes ?
Subscribers do not see these advertisements
OP
OP
Attachments
OP
OP
Thanks. I'll look into settings and sound deadening when home next week. In the meantime can you say how I would switch off charging? Sorry to be such a pain.
What was powering the kettle?
OP
OP
She was
Silver-Fox
LIFE MEMBER
Impressive, she must be a little dynamo
Any type of transformer will buzz, by nature of the way they work
Subscribers do not see these advertisements
OP
OP
Only if you energise it. I would have assumed that a good charging controller would not feed a full battery. Hey, but what do I know?Impressive, she must be a little dynamo
Any type of transformer will buzz, by nature of the way they work
Without going into settings, the only way is to pull the AC in plug out, at the bottom of the inverter. That way you still retain the hook up power if is separated. If all goes through the inverter, then you loose all AC hook up. You will still have the AC out from the inverter powered by the battery.
I was just thinking that if the kettle was a 240v one, and when in use, the noise stops, is this due to the voltage dropping? Is the voltage where you are very high so the unit doesn’t like the high voltage? I’ve got some customers who’s houses are 260v so it is possible.
- Oct 13, 2016
- 1,066
- 901
- Funster No
- 45,568
- MH
- Mercedes Hymer B680
- Exp
- Been moho’ing for a time now
I think you’ll find the vibrations are more due to the current draw rather than the voltage drop
OP
OP
Strange thing is we've been away 3 weeks and had occasional buzz as you'd expect then 2 days of near constant buzz.
Subscribers do not see these advertisements
Join us or log in to post a reply.
To join in you must be a member of MotorhomeFun
Join MotorhomeFun
Join us, it quick and easy!
Log in
Already a member? Log in here.