We have a benchtop size peltier refrigerator made by Salton, which has stopped refrigerating after about two years of operation.
The p.c.b. has two LEDs, green and red, visible here.
formatting link
The external fan still spins but the chamber is about
15 degrees C.
A few months back the p.s. failed and the two big capacitors were obviously leaking. With new caps the p.s. worked again.
Two questions before I consider troubleshooting.
Are peltier devices short lived?
Any ideas about what the LEDs indicate?
Thanks, ... Peter E.
Didn't find your answer? Ask the community — no account required.
W
William Sommerwerck
What does Salton say about it?
W
William R. Walsh
Hi!
Not that I know of. They are very simple devices, and I've had a few operating on and off over the past several years.
However, they do use a LOT of power and sometimes the switches, power sockets and wiring used to hook them up are not up to the task. I've seen a lot of peltier-type coolers and "refrigerators" with burned switches or undersized wiring.
I'd have thought they might be used to indicate "heating" and "cooling", but it appears not. Most of the devices I've seen have a means by which to reverse the polarity of the DC power going into the peltier, effectively swapping the "hot" and "cold" ends around.
If both lights are on and the unit is switchable between heating and cooling, perhaps it is a fault indication? If there is a switch to select between these modes, is it good? (If it had melted or failed from the load, the unit might fail to operate altogether.)
I was more surprised to see a switchmode power supply in there. Every peltier based device I have (new to old) has used a transformer-type supply.
William
A
AZ Nomad
what is google?
P
Peter
Nothing pertinent or helpful on their Web site, unless it is very well hidden. I'm waiting for a reply to an emessage.
The Web site marked on the PCB,
formatting link
, also hasn't helped. Appears to be provided for marketing only. No evidence of any numbers found on the PCB.
Thanks, ... Peter E.
M
mike
They don't like ripple on the DC.
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required
Report Content
You are reporting this content to the moderators. They will look at it
ASAP.