Component Testing - Amana V Series Service Manual

Component Testing

To avoid risk of electrical shock, severe personal injury or death; disconnect power to unit before servicing,
unless testing requires power. Discharge capacitor through a 10,000 ohm resistor before handling.
Component Description
Capacitor Run capacitor connects to relay terminal 3
and L side of line.
Auger motor capacitor is in series with auger
motor. Auger motor capacitor does not have
identified terminals and can be wired without
regard to polarity.
Capillary tube Capillary is sized in diameter and length to
feed proper amount of refrigerant to
evaporator.
Capillary is soldered to suction line to transfer
heat from capillary and add additional
superheat to gas refrigerant in compressor
suction line.
Capillary discharges into evaporator.
Timer, defrost Timer motor operates only when freezer
temperature control is closed. After specified
amount of actual compressor run time, cam in
timer throws the contacts from terminal 4
(compressor circuit) to terminal 2 (defrost
terminator and defrost heater).
After 33 minutes of defrost time, timer cam
restores power to terminal 4 (compressor).
Valve, water Controls water flow to icemaker and cavity.
Damper Control Damper control balances cold-air delivery
between refrigerator and freezer
compartments.
In non-electronic units, integral capillary
activates damper control to close or open
door, regulating airflow from freezer
compartment into fresh-food compartment.
In electronic units, temperature control and
thermistor together determine if damper-
control heater switch is open or closed.
Damper controls on non-electronic units have
no electrical connections.
RS1300004 Rev. 1
!
WARNING
Test Procedure
1. Disconnect power to refrigerator.
2. Remove capacitor cover and disconnect capacitor wires.
3. Discharge capacitor by shorting across terminals with a resistor for 1
minute.
4. Check resistance across capacitor terminals with ohmmeter set on
"X1K" scale.
• Good — needle swings to 0 ohms and slowly moves back to infinity.
• Open — needle does not move. Replace capacitor.
• Shorted — needle moves to zero and stays. Replace capacitor.
• High resistance leak — needle jumps toward 0 and then moves
back to constant high resistance (not infinity).
Restricted or clogged capillary tube must be replaced with tube of same
inner diameter and length.
Follow all procedures for evacuation and charging of sealed system and for
safe handling of refrigerant.
1. To check timer-motor winding, look for continuity between terminals 1
and 3 of timer.
2. Depending on position of cam, timer terminal 1 is common to terminal
2, (defrost mode) or terminal 4 (compressor mode). There must be no
continuity between terminals 2 and 4.
3. With continuity between terminals 1 and 4, rotate timer knob clockwise
until audible click is heard. When click is heard, reading between
terminals 1 and 4 should be infinite and there should be continuity
between terminals 1 and 2.
4. Rotate timer knob until second click is heard. This should restore circuit
between terminals 1 and 4.
Check resistance across coil windings.
Subject capillary to appropriate temperature (see tech sheet for model being
serviced). Damper door should close to within ¼" (6 mm) of completely shut.
Non-electronic units: If altitude adjustment is required, turn altitude
adjustment screw 1/8 turn clockwise for each 1,000 feet (305 meters)
increase in altitude above sea-level.
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