Operating instructions

14 16400009 ©2010 ACP Inc.
Troubleshooting Procedures (Electronic Models)
Trouble 4: The following visual conditions indicate a probable failed control circuit or
membrane switch assembly.
1. Incomplete segments.
• Segmentmissing.
• Partialsegmentmissing.
• Digitickering(Note:Slightickeringisnormal.)
• “:0”doesnotdisplaywhenpowerison.
2. Adistinctchangeinthedisplayisnoton,whenitshouldbe.
3. Oneormoredigitsinthedisplayarenoton,whenitshouldbe.
4. Displayindicatesanumberdifferentfromonetouched,forexample,keyin5and3appearsinthedisplay.
5. Specicnumbers(forexample7or9)willnotdisplaywhenkeypadistouched.
6. Displaydoesnotcountdownorupwithtimecookingorclockoperation.
7. Ovenisprogrammedandcooksnormally,butnodisplayisindicated.
8. Displayobviouslyjumpsintimewhilecountingdown.
9. Displaycountsdowntoofastwhilecooking.
10.Displaydoesnotshowthetimeofdaywhenclearpadistouched.
11.Ovenlampandturntablemotordonotstop,althoughcookingisnished.CheckifRELAY2contactsclose,if
theyareclosed,replacetouchcontrolcircuit.
NOTE: Beforefollowingtheparticularstepslistedaboveforthetouchpad,verifycontinuityofeachwireharness
betweenthetouchpadandprintedcircuitboard.
Display does
not indicate
programming
at all, even if
panel is
touched.
Normal
Replace
control
board.
Malfunction
of control
board.
Check each
pad on touch
panel.
Abnormal
Replace
membrane
keypad.
Malfunction
of membrane
keypad.