Maytag ACO1520AB Service Manual page 16

Troubleshooting Procedures
Check:
1. Primary and Secondary Interlock Switches.
2. Thermostat.
Unit does not heat even
if display counts down
when START pad is
pressed for high power.
Does relay
contacts measure
correct resistance.
NO
Replace
circuit
board.
Unit operates.
Unit does not heat even
if display counts down
when START pad is
pressed for high power.
Does transformer
have the correct
resistance.
NO
Replace
high voltage
transformer.
Unit operates.
16021668 Rev. 0
Check the
contacts of
RY2 relay.
Verify proper
connection of
YES
ribbon
connector.
NO
Reconnect ribbon
connector for
proper
connection.
Measure resistance of
high voltage transformer.
See to Testing
Procedures on page 10.
Measure
resistance of high
YES
voltage capacitor.
See to
Testing Procedures
on page 10.
Replace
high voltage
transformer.
Replace
high
voltage
diode.
Replace
magnetron.
16
Does ribbon
connector have
proper
connection.
YES
Replace
circuit
board.
Does capacitor
have correct
resistance.
NO
Measure
resistance of high
voltage diode.
See to
Testing Procedures
on page 10.
Does diode
NO
have correct
resistance
YES
©2002 Maytag Appliances Company
YES