Ptc Relay; Condenser Motor - Jenn-Air JWC2450ARB Service Manual

Component Testing
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
Component Description

PTC Relay

When voltage is connected and relay is
cool, current passes through relay to
start winding.
After a short time, current heats the
resistor in relay and resistance will rise
blocking current flow through relay.
Start winding remains in the circuit
through run capacitor.
Solid state relay plugs directly on
compressor start and run terminals. Relay
terminals 2 and 3 are connected within
relay. Run capacitor is connected to relay
terminal 3. L2 side of 120 VAC power is
connected to relay terminal 2.
(SSAC) Electronic Electronic control that uses a thermistor to
control sense temperature of cabinet and
rheostat to adjust temperature.
Condenser motor Condenser fan moves cooling air across
condenser coil and compressor body.
Condenser fan motor is in parallel circuit
with compressor.
Cabinet light Single pole, single throw switch
switch completes circuit for light when door is
open.
10
!
WARNING
Test Procedures
1. Disconnect power to the refrigerator.
2. Remove relay cover and disconnect leads.
3. Check resistance across terminals 2 and 3 with an ohmmeter:
Normal = 3 to 12 ohms
Shorted = 0 ohms
Open = infinite ohms
1. Check resistance of thermistor before replacing Electronic control.
2. If resistance of thermistor is good replace Electronic control
Check resistance across coil.
Check resistant across terminals.
Switch arm depressed
"NO" terminals
Switch arm up
"NO" terminals
16022323 Rev. 0
Open
Closed
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