tek210
Well-Known Member
Last year I converted an Oster (Model OR5005M3M) fridge into a kegarator and it worked great for a year. About a month ago it just stopped working. My uncle who has always done some side appliance work has been taking a look at it, but due to limited wiring schematics and resources is at an impasse. Below is a summary of what he has done so far. If anyone has any information on this model firdge or any advice on what he could try next, it would be greatly appreciated.
"I verified the circuit between the L input wire the and grate control and
the first thermostat input connection. The grate control and the first
connection (call it the inlet conn) to the thermo switch is the L wire
spliced. I then checked the next connection (call it the outlet connection)
to the N wire and had a connection. That conn goes thru the motor overload
switch, the start and run windings of the compressor PTC Relay and the start
relay. Since the PTC Relay is normally closed (Based on Definition) I would
guess that it is the starting relay.
The PTC (Positive Temperature Coefficient) relay is a starting device. As
typically, as current passes through PTC material it causes an increase in
temperature which in turn results in increased resistance until it reaches
an open circuit.
The PTC is wired between Run and Start, when the compressor is powering up,
the PTC is cold, which gives it a resistance of about 25 Ohms. So when
starting, the compressor start winding gets current through it needs to get
up to speed."
Joe
"I verified the circuit between the L input wire the and grate control and
the first thermostat input connection. The grate control and the first
connection (call it the inlet conn) to the thermo switch is the L wire
spliced. I then checked the next connection (call it the outlet connection)
to the N wire and had a connection. That conn goes thru the motor overload
switch, the start and run windings of the compressor PTC Relay and the start
relay. Since the PTC Relay is normally closed (Based on Definition) I would
guess that it is the starting relay.
The PTC (Positive Temperature Coefficient) relay is a starting device. As
typically, as current passes through PTC material it causes an increase in
temperature which in turn results in increased resistance until it reaches
an open circuit.
The PTC is wired between Run and Start, when the compressor is powering up,
the PTC is cold, which gives it a resistance of about 25 Ohms. So when
starting, the compressor start winding gets current through it needs to get
up to speed."
Joe
