How to Pump Down a Sanyo M/S without a main board?

Xringer · 08-25-16, 04:20 PM

My main board on the den Sanyo is toast. So, how can I pump down the lineset?
To move all the R410a in the lineset, into the outdoor unit, I need to run that compressor.

It seems like all I have to do, is swap out the main board on the 'working' Sanyo (living room)..
But, I'm reluctant to risk my good main board, in an ODU that might zap it..
However, if the living room Sanyo will power up and run, without it's compressor plugged in, (lines U,V & W)
maybe I can run (50' extension cord) the three motor lines from good unit, to the bad unit's compressor??
If it didn't want to run, maybe T-Test mode would force it to work?

Is this idea dumb or just crazy?
Comments please:

I really don't want to blow up my old living room Sanyo, since it's been
keeping us cool all summer.. Yes, it does cool the whole house..

But, if I have to transfer the main board, I will take that chance..
I should be able to buy some new Gree systems before we melt here!
It's slowly getting cooler, but not that fast..

08-25-16, 04:20 PM	#1
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	How to Pump Down a Sanyo M/S without a main board? My main board on the den Sanyo is toast. So, how can I pump down the lineset? To move all the R410a in the lineset, into the outdoor unit, I need to run that compressor. It seems like all I have to do, is swap out the main board on the 'working' Sanyo (living room).. But, I'm reluctant to risk my good main board, in an ODU that might zap it.. However, if the living room Sanyo will power up and run, without it's compressor plugged in, (lines U,V & W) maybe I can run (50' extension cord) the three motor lines from good unit, to the bad unit's compressor?? If it didn't want to run, maybe T-Test mode would force it to work? Is this idea dumb or just crazy? Comments please: I really don't want to blow up my old living room Sanyo, since it's been keeping us cool all summer.. Yes, it does cool the whole house.. But, if I have to transfer the main board, I will take that chance.. I should be able to buy some new Gree systems before we melt here! It's slowly getting cooler, but not that fast.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..