Testing Procedures; Power Supply; Internal Wiring; Surface Elements (Infinite) Switch - Amana AKEF3070 Manual

Testing Procedures

To avoid electrical shock, personal injury, or death: disconnect power supply before servicing, unless testing
requires it.

Power Supply

If no part of the cooktop operates or only part of it
operates, the cause may be a problem with the power
supply to the cooktop.
1. Verify supply circuit breakers or fuses are not tripped.
Check rating.
2. Disconnect power source. Check terminals at
terminal block for tightness.
3. Verify cooktop service wires are properly connected.
Be sure wires are in good condition. Check for
continuity with an ohmmeter.

Internal Wiring

1. Disconnect power from cooktop.
2. Place one ohmmeter lead at terminal block. Place
other lead at the line terminal of the non−functioning
parts control. Meter should indicate continuity.
Use the appropriate wiring diagram to repeat this
procedure from the output of the control to the next point
until each wire section is checked. Often a visual check
of the wiring will determine where a wiring fault is.

Surface Elements (Infinite) Switch

The surface units and controls offer infinite heat settings.
Controls must be pushed down before turning. All
surface controls are marked on the control panel for their
respective heating unit. Infinite switch contacts L1 - H1
and L2 - H2 provide power to the surface elements.
Check continuity on infinite switch contacts by using the
following steps.
1. Turn off power to cooktop.
2. Remove all control panel knobs. Remove control
panel assembly.
3. Remove switch mounting bracket screws. Lift bracket
upward. The location of the switch terminals is shown
below.
P L1
H1
Infinite Switch Contacts
RS2420004 Rev. 1
!
TOP
L2
H2
WARNING
4. Remove wiring from switch.
5. Set ohmmeter on R x 1K scale. Check for continuity
according to the following chart.
Contacts
L1 - L2
L1 - P
L1 - H1
L2 - H2
H1 - H2
O−Open X−Closed
E−Indicates resistance across internal heater
6. If any contacts fail continuity test, replace infinite
switch.
NOTE: During actual surface element operation,
contacts L2 - H2 will cycle to maintain the
correct heat setting. Contacts L1 - P provide
power to the surface element indicator light.
L1
L2
Infinite Switch Schematic
If the infinite switch contacts are good and the element
does not heat, check for voltage at the heating element
terminal plug block. A voltage of 240 V should be
indicated. If no voltage is indicated, check for a broken
wire or loose connection.
8
DIAL POSITION
OFF LO-MED HI
0 E X
0 X X
0 X X
0 X - C X
X E X
C−Cycles
P1
H1
H2