Amana Bottom Mount Refrigerator service manual Switch Continuity Functions Test

Component Function and Testing

Motor,	Condenser fan moves cooling air across condenser coil	Check resistance across coil.
condenser psc	and compressor body.
	The condenser motor is in a parallel circuit w ith the
	compressor.
Motor, ecm	Evaporator motor moves air across evaporator	Check resistance from ground connector solder. Trace to motor frame
evaporator fan	coil and throughout refrigerator.	must not exceed .05 ohms. Check pow er at connector to evaporator
		motor.
	Evaporator fan motor is in a parallel circuit w ith
	compressor, w ith a delay for w arm coil
	conditions.
Motor,	Refrigerator fan circulates cold air into refrigerator	See "Refrigeration and Defrost Component Checks Made at High Voltage
refrigerator fan	compartment.	Board" section for D.C. voltage check at high voltage board. Check for
	The refrigerator fan motor is in a series circuit w ith the	voltage at motor also.
	semi conductor sw itch.
Overload	Overload is a temperature and current sensing type.	1. Disconnect pow er to refrigerator.
	Overload opens w hen sensing a high current or high	2. Remove relay cover and pull relay off compressor.
		3. Pull overload protector off compressor common terminal.
	compressor temperature.	3. With ohmmeter, check resistance betw een 1/4 " male terminal and
		female pin receptacle terminal w hich pushes onto compressor common
	After overload opens, overload can require up to 2	terminal. At ambient temperature, overload protector should have less
	hours to reset, depending on ambient temperature and	than 1 ohm resistance. An open overload protector w ill have infinite
	residual heat load in compressor.	resistance.

Relay, PTC	When voltage is connected and PTC is cooled, current	With pow er off check resistance.
	passes through PTC to the start w inding.	Across terminals 2 & 3:
		Normal = 3 to 12 ohms
	After a short time, current w ill have heated the resistor	Shorted = 0 ohms
	in PTC and resistance w ill rise. This blocks current	Open = infinite ohms
	flow through PTC.
	Start w inding remains in the circuit through the run
	capacitor.
	Solid state relay plugs directly on compressor start and
	run terminals. Relay terminals 2 and 3 are connected
	w ithin relay. Run capacitor is connected to relay
	terminal 3. The L2 side of 120 VAC pow er is
	connected to relay terminal 2.
Sw itch,
keyboard			Switch	Continuity
			Functions	Test
			Display On	1 and 3
			Freezer Temp	3 and 6
			Ref Temp	3 and 7
			Warmer	6 and 7
			Colder	4 and 6
			Vacation	4 and 7
			Max Ref	7 and 8
			Max Frz	4 and 8
			Alarm Off	4 and 5
			Display Off	5 and 8

RS1200001 Rev. 1 22 April 1998