Title: Need help with wiring
Post by: SquareTopCollector on May 02, 2007, 09:30:55 pm
I am having some problems with my uss-8-64 cavalier machine. I am troubleshooting and need some guidance from you pros. The compressor won’t shut off; well it shuts off maybe once a day which probably the safety is shutting off the unit. The machine is full and the t-stat is on the 3rd setting. I have already disconnected one wire from the T-stat and it still runs. Here are some pics of the wiring and the wiring diagram.
Title: Need help with wiring
Post by: SquareTopCollector on May 02, 2007, 09:32:05 pm
by the way I am color blind 
Title: Need help with wiring
Post by: johnieG on May 02, 2007, 10:34:25 pm
If the machine is wired properly & compressor still runs with one of the thermostat wires lifted from the thermostats terminals , ( I'm assuming that's where you've remove the wire from) it should shut off, then it's getting line voltage back-feed into it. which isn't likley.
Note that the schematic shown doesn't involve the compressor or thermostat circuts at all, it ( the wiring block shown in the schematic ) only gets it's line voltage from the compressor harness/wiring block down on the compressor deck,
so if you've disconected the wire(s) from either pin/socket # 1-[plain] or #8-[ribbed] you are only disconnecting the line voltage into the machines vending & lighting circut, be sure to try it from teh back of the T-Stat proper, & watch out, it's a "hot" connection ( tape the loose end up to prevent shorting it out on the chassis/shock)
Note that the schematic shown doesn't involve the compressor or thermostat circuts at all, it ( the wiring block shown in the schematic ) only gets it's line voltage from the compressor harness/wiring block down on the compressor deck,
so if you've disconected the wire(s) from either pin/socket # 1-[plain] or #8-[ribbed] you are only disconnecting the line voltage into the machines vending & lighting circut, be sure to try it from teh back of the T-Stat proper, & watch out, it's a "hot" connection ( tape the loose end up to prevent shorting it out on the chassis/shock)
Title: Need help with wiring
Post by: SquareTopCollector on May 02, 2007, 10:47:00 pm
I tried it from the back of the t-stat and it still runs.
Could I be low on freon?
Could I be low on freon?
Title: Need help with wiring
Post by: SquareTopCollector on May 05, 2007, 08:56:42 pm
can anyone help? I don't want to loose this machine. The ice build up is getting bad
Please someone help
Please someone help
Title: Need help with wiring
Post by: SquareTopCollector on May 15, 2007, 09:14:26 am
anyone?
Title: Need help with wiring
Post by: MoonDawg on May 15, 2007, 10:32:44 am
Follow your T/S wires all the way back to the junction box.
They must be touching each other somewhere.
They must be touching each other somewhere.
Title: Need help with wiring
Post by: SquareTopCollector on May 15, 2007, 10:34:43 am
T/S = T stat right?
Thanks for the reply
Thanks for the reply
Title: Need help with wiring
Post by: sodaworks on May 15, 2007, 10:48:28 am
(SquareTopCollector @ May 15 2007,8:34)
QUOTE
T/S = T stat right?
Yes
Title: Need help with wiring
Post by: SquareTopCollector on May 15, 2007, 10:54:27 am
could the wires be inserted in the junction box incorrectly?
Title: Need help with wiring
Post by: MoonDawg on May 15, 2007, 11:43:07 am
The pic. you show is the mechanical terminal block, you
want to find the refrigeration junction box
want to find the refrigeration junction box
Title: Need help with wiring
Post by: SquareTopCollector on May 15, 2007, 11:57:47 am
ok 2 more questions
1) what does the refrigeration junction box look like and where is it usually located?
2) some of the wires for the compressor go into the mechanical terminal block, if these wires are in the wrong order could that be the cause of my problems?
Thanks guys I am learning
1) what does the refrigeration junction box look like and where is it usually located?
2) some of the wires for the compressor go into the mechanical terminal block, if these wires are in the wrong order could that be the cause of my problems?
Thanks guys I am learning
Title: Need help with wiring
Post by: Jim on May 15, 2007, 05:27:45 pm
I did a quick search on "wiring" in the Refrigeration Section and came up with an old thread dealing with refrigeration wiring for a V-39. The image will give you a better understanding of a simple wiring for the refrigeration system. reviewing this should get you on track to trouble shoot where the possible problem may be...
Refrigeration Section: Wiring
Hopefully helpful...
Refrigeration Section: Wiring
Hopefully helpful...
Title: Need help with wiring
Post by: SquareTopCollector on May 16, 2007, 06:44:44 am
thanks Jim. I found that wires for the vending mech were creating a circuit with the T-stat wires in the junction box. I removed the wires for the vending rack because the machine vends for free anyways. Now the compressor runs differently and it does not get as cold as fast but gets as cold over 20- 30 min. I still have ice on the evap coils so I dont know if I fixed it or not yet.
Title: Need help with wiring
Post by: bubba on May 16, 2007, 07:13:59 am
That sounds like low on freon...