If it's a Norcold 2 way, the unit has a 'two part' power supply that
converts 12DC to 24 volts AC; it also converts 120 VAC to 24 VAC.
The compressor resonates at 60 cycles (Hertz) to make the unit work.
I'd suspect that the 120 to 24 side of your unit's power supply isn't
working.
It probably works on shore power from the 12 volt side, as the batteries are
being charged by the converter.
(Don't know exactly, however, why only the Onan will 'trick' the unit into
not working... but it's probably an input frequency dependant problem.)
These power supplies are somewhat a goofy thing. There is a guy in Elkhart
that repairs them, I'll see if I can find his number. It's been posted here
before, but I'm at work and don't have it at my fingertips.
Let me know if I can be of further help.
Mark Grady
mgrady
v: 219-831-7133
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of pete
> Sent: Monday, August 03, 1998 5:04 PM
> To: gmcmotorhome
> Subject: GMC: 2 way frig: 12 volt and 120 volt
>
>
> works great off of shore and 12 volt but not when gen(6kw onan)is
> running. all outlets in coach are at 115 v with onan running at full
> load including water heater and both a/c units. in addition, if i'm
> traveling and am using the onan to run the roof a/c the frig starts
> getting warmer; cut the onan off and the the frig starts to get cold
> again. this has me baffled and befuddled.... HELP!!!!!!
> Pete Blake
>
converts 12DC to 24 volts AC; it also converts 120 VAC to 24 VAC.
The compressor resonates at 60 cycles (Hertz) to make the unit work.
I'd suspect that the 120 to 24 side of your unit's power supply isn't
working.
It probably works on shore power from the 12 volt side, as the batteries are
being charged by the converter.
(Don't know exactly, however, why only the Onan will 'trick' the unit into
not working... but it's probably an input frequency dependant problem.)
These power supplies are somewhat a goofy thing. There is a guy in Elkhart
that repairs them, I'll see if I can find his number. It's been posted here
before, but I'm at work and don't have it at my fingertips.
Let me know if I can be of further help.
Mark Grady
mgrady
v: 219-831-7133
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of pete> Sent: Monday, August 03, 1998 5:04 PM
> To: gmcmotorhome
> Subject: GMC: 2 way frig: 12 volt and 120 volt
>
>
> works great off of shore and 12 volt but not when gen(6kw onan)is
> running. all outlets in coach are at 115 v with onan running at full
> load including water heater and both a/c units. in addition, if i'm
> traveling and am using the onan to run the roof a/c the frig starts
> getting warmer; cut the onan off and the the frig starts to get cold
> again. this has me baffled and befuddled.... HELP!!!!!!
> Pete Blake
>
