Component Testing Procedures
!WARNING
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 in the power supply.
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 proper voltage with a voltmeter.
3.Turn control to LOW setting and allow it to cycle approximately two minutes. Time the OFF and ON cycle of the control and compare to the following table based on a 60 second cycle.
SETTING | APPROXIMATE SECONDS | |
TIME | ON | OFF |
LOW | 4 | 56 |
4 | 21 | 39 |
HIGH | Constant | 0 |
Internal Wiring
1.Disconnect power from cooktop.
2.Place one ohmmeter lead at the terminal block.
Place the other lead at the line terminal of the non−functioning part. 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.
Indicator Light
1.If the surface unit operates normally but the indicator lights do not glow, check for voltage at the indicator light terminals.
2.If voltage is present at the indicator terminals and the indicator does not glow, replace the indicator light.
3.If no voltage is present at the terminals, check for loose connections or broken wiring.
Warming Element (Infinite Switch)
Power Connection
1.See schematic diagrams for assistance in testing voltages in and out of control.
2.Connect a voltmeter to the element or the terminals H1 and H2 of the surface warming control.
4.Replace the control if it is not cycling properly. Calibration is not possible.
Resistance / Continuity
A malfunction in the internal switching may fuse the cycling contacts. This causes the heating element to operate at full power, at all control settings, while cycling on element limiter.
1.Disconnect power from cooktop.
2.See “Disassembly Procedure“ to access switch.
3.Connect voltmeter test lead to H1 and H2 terminals.
4.Connect appliance to power source.
5.Set control to any setting. Meter should indicate 120 VAC volts. After allotted ON cycle, contacts should cycle open and indicate 0 VAC.
|
|
| Dial Position |
| |||
| Contacts | OFF |
|
| HI | ||
| L1 | – P | O |
| X |
| X |
| L1 | – H1 | O |
| X |
| X |
| L1 | – H2 | O |
| X – C |
| X |
| H1 – H2 | X |
| E |
| X | |
O−Open | X−Closed | C−Cycles | |||||
E−Indicates resistance across internal heater
P1
L1H1
H2
L2
Surface Elements (Infinite Switch)
Power Connection
1.See schematic diagrams for assistance in testing voltages in and out of control.
2.Connect a voltmeter to the element or the terminals H1 and H2 of the surface control.
3.Turn control to LOW setting and allow it to cycle approximately two minutes. Time the OFF and ON cycle of the control and compare these to the following table.
©2003 Maytag Appliances Company | 16022159 Rev. 0 | 9 |