Clean Relay - Amana AO27DG Service Manual

Test Procedures
!
WARNING
4. Meter should indicate infinite ohms or no continuity
with lock lever in open position.
5. Push switch actuator arm to close switch contacts.
Meter should indicate continuity or low ohms. If
switch contacts indicate continuity or an open cir-
cuit in both positions, replace the switch.
6. Repeat procedure on other latch switch.
Accessing the lower latch switches requires oven re-
moval and partial separation of the upper and lower
oven tanks. An alternate test procedure can be per-
formed to eliminate oven removal. This test is can be
used only with selector switch set to lower clean. Use
the following procedure to conduct the test.
1. Move lower latch lever to lock position. Disconnect
power from oven.
2. Set lower oven thermostat to OFF position.
3. Remove control panel and control panel mounting
bracket.
4. Set ohmmeter to the low range. Check rear latch
switch by touching one meter lead to the N.O. ter-
minal on the lower oven thermostat. Touch other
lead to terminal 7 on the lower clean relay. Meter
should indicate continuity or low ohms.
The top latch switch can be checked in a similar man-
ner. See the following procedure.
1. Move lower latch lever to lock position. Disconnect
power from oven.
2. Set lower oven thermostat to broil. Set selector
switch to manual.
3. Set ohmmeter to the low ohm range. Touch one
meter lead to the N.C. terminal on lower oven ther-
mostat. Touch other lead to terminal 9 on lower
clean relay. Meter should indicate continuity or low
ohms.
4. Repeat test with latch lever in open position. Meter
should indicate no continuity or infinite ohms. Re-
place switches which fail test.

Clean Relay

The clean relays are mounted to the right control com-
partment side panel and function only during self-clean
operations. During self-clean operation, clock contacts
13-14 close supplying 120 VAC to the relay coil which
closes the relay contacts 7-4 and 9-6.
Contacts 7-4 complete the clean circuit through the
sail switches, selector switch, thermostat, rear latch
switch, broil ignitor and broil gas valve to neutral.
To avoid the risk of electric shock, personal injury or death, disconnect power To avoid the risk of electric shock, personal injury or death, disconnect power To avoid the risk of electric shock, personal injury or death, disconnect power
To avoid the risk of electric shock, personal injury or death, disconnect power To avoid the risk of electric shock, personal injury or death, disconnect power
before servicing, unless testing requires it. before servicing, unless testing requires it. before servicing, unless testing requires it. before servicing, unless testing requires it. before servicing, unless testing requires it.
21
Contacts 9-6 complete the self-clean circuit through
the sail switches, selector switch, thermostat, top latch
switch, bake ignitor and bake gas valve to neutral.
Use the following procedure to check the relay coil for
continuity.
1. Disconnect power from oven.
2. Access clean relay terminals by removing oven
from cabinet and the oven cabinet top.
3. Set ohmmeter to RX10 range.
4. Remove wiring from terminal A and B. Connect
meter leads to A and B.
5. This is a test just for continuity. Meter readings
may vary with each relay tested. If infinite ohms
are indicated, the relay coil is open and must be
replaced.
Use the following procedure to check relay contacts 7-
4 and 9-6 for continuity.
1. Disconnect power from oven.
2. Access clean relay terminals by removing oven
from cabinet and the oven cabinet top.
3. Set ohmmeter to low ohms range.
4. Remove relay wiring. Remove relay from control
compartment side panel.
5. Attach a line test cord to terminals A and B on re-
lay.
6. Attach meter leads to terminals 7 and 4.
7. Apply power to relay coil.
8. Meter should indicate continuity.
9. Repeat test for contacts 9-6. Replace relay if either
set of contacts fail test.
Clean Relay
RA233001 Rev. 3