Amana SB520T, Service

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