KitchenAid KHMS105E service manual Contacts

Microwave Oven Hood Combo Service Manual — LIT 4317216

Original 03/97

Page 3-21

COMPONENT	TEST PROCEDURE	RESULT
Switches (with wire leads re-	N.O. and C Terminals
moved). All of the switches are	Set the ohmmeter to the R x 1		a) Normal - The meter indi-
measured in the same manner.	scale, and measure the resistance		cates infinity.
N.C. CONTACTS	between the normally-open (N.O.)		b) Abnormal - The meter
	and the common (C) terminals of
			indicates zero ohms (a
C.	the switch.
			short).
N.O. CONTACTS
	N.C. and C Terminals
	Set the ohmmeter to the R x 1		a) Normal - The meter indi-
	scale, and measure the resistance		cates continuity, or zero
	between the normally - closed		ohms.
	(N.C.) and the common (C) termi-		b) Abnormal - The meter
	nals of the switch.
			indicates infinity.
Temperature Probe	Set the ohmmeter to the R x 10 k		Ambient	Resistance
	scale, and measure the tempera-	Temp. (˚F)		Value
	ture probe with the leads posi-
			60	75.24 kΩ (±11 kΩ)
	tioned at either terminal.	68		62.57 kΩ (±8 kΩ)
		70		59.79 kΩ (±8 kΩ)
		80		45.80 kΩ (±7 kΩ)
		90		36.94 kΩ (±6 kΩ)
Fan Motor (with leads discon-	Set the ohmmeter to the R x 1		a) Fan Motor - Normal = 30
nected).	scale, and measure across the		to 45 ohms.
	terminals.

Blower Motor (with leads dis-	Set the ohmmeter to the R x 1
connected)	scale, and measure the:
	a) High speed windings (blue	a) Normal - High speed: 25
	and black wires).	to 45 ohms.
	b) Low speed windings (blue	b) Normal - Low speed: 45
	and white wires).	to 65 ohms.
Synchronous Motor (with leads	Set the ohmmeter to the R x 1000	a) Normal - 3 k to 4 k ohms.
disconnected)	scale, and measure the resistance
		b) Abnormal - Infinite or
	between the motor terminals.
		zero ohms.

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