Tayters
27-06-2014, 05:01 PM
Chaps, little poser for you.
Worked on a 12ft Carter serve over, all working now no problem but got a query about a switch in the electrics box.
Unit has a pull out electrics box with an RDM controller and a Danfoss tandem compressor and the bit that puzzles me is in the middle of said box is a rocker switch to select 'Self Serve' or 'Serve Over' and next to it a rotary knob which goes to a component underneath on a heatsink.
Question is what is this switch and rotary jobbie supposed to do?
Had a bit of a fiddle and on pull down from room temp (30*C - hot shop!) it activated the second compressor when switched to serve over and once setpoint was a degree off the same compressor cycled on/off for a bit until setpoint was a bit lower when just one compressor operated.
So this switch somehow selects the second compressor (and the rotary switch some type of delay function maybe, but how exactly? Perhaps wired to the controller as an input and a subsequent setting for it?
No wiring diagram and looks like the electrics were designed by NASA so not obvious what goes to where.
Anyone come across this before?
Thanks,
Andy.
Edit:
Just had a look at the controller guide. Mercury 6-5 M/E. Makes a Carel look simple, jeez. There are settings for comp lag delay and diff so looks like the switch does something else I guess.:confused:
Worked on a 12ft Carter serve over, all working now no problem but got a query about a switch in the electrics box.
Unit has a pull out electrics box with an RDM controller and a Danfoss tandem compressor and the bit that puzzles me is in the middle of said box is a rocker switch to select 'Self Serve' or 'Serve Over' and next to it a rotary knob which goes to a component underneath on a heatsink.
Question is what is this switch and rotary jobbie supposed to do?
Had a bit of a fiddle and on pull down from room temp (30*C - hot shop!) it activated the second compressor when switched to serve over and once setpoint was a degree off the same compressor cycled on/off for a bit until setpoint was a bit lower when just one compressor operated.
So this switch somehow selects the second compressor (and the rotary switch some type of delay function maybe, but how exactly? Perhaps wired to the controller as an input and a subsequent setting for it?
No wiring diagram and looks like the electrics were designed by NASA so not obvious what goes to where.
Anyone come across this before?
Thanks,
Andy.
Edit:
Just had a look at the controller guide. Mercury 6-5 M/E. Makes a Carel look simple, jeez. There are settings for comp lag delay and diff so looks like the switch does something else I guess.:confused: