Amana SR520T Service page 38

Component Testing
Relay, PTC 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 230 VAC
power is connected to relay terminal 2.
Switch, keyboard Semiconductor switch for control panel
keyboard.
Switch, SPDT Interrupts connection to auger motor and
icemaker interlock icemaker when freezer door is open.
Turns freezer light on when door is open.
In series with auger motor and
cube/crushed switch and freezer light.
Switch, Selects between cubed or crushed ice
crushed/cubed feature.
Switch, Completes circuit to allow indicated
refrigerator light, function. See tech sheet and wiring
freezer light, diagram for individual switch.
refrigerator fan
Switch, power SPDT
Electronic models only. Disconnects
power to high voltage board when switch
is off (open.)
Unit shipped with switch on.
RS590000 Rev. 0
With power off check resistance across terminals 2 and 3:
Normal = 3 to 12 ohms
Shorted = 0 ohms
Open = infinite ohms
Keypad
Switch Functions Symbol
Enable Key S1
Freezer Temperature S2
Refrigerator Temperature S3
Warmer S4
Colder S5
Vacation S6
Max Cool S7
Fast Freeze S8
Alarm Off S9
Display Off S10
Check resistance across terminals.
Continuity across terminals 1 and 2 – light
Continuity across terminals 1 and 3 – auger motor
Check resistance across terminals.
Switch left
Middle terminal to left terminal
Middle terminal to right terminal
Switch right
Middle terminal to right terminal
Middle terminal to left terminal
Check resistant across terminals.
Switch arm down
"NC" terminals
"NO" terminals
Switch arm up
"NC" terminals
"NO" terminals
Check resistance across terminals
Swtch OFF
Switch ON
40
Continuity
Test
1 and 3
3 and 6
3 and 7
6 and 7
4 and 6
PERIMETER
STATIC GUARD
4 and 7
7 and 8
4 and 8
4 and 5
5 and 8
0 ohms
infinite ohms
0 ohms
infinite ohms
Closed
Open
Open
Closed
0 ohms
infinite ohms
April 1998