ā 58 ā
Stirrer Does Not Work
Enter the Service mode.
Does the stirrer motor come on?
No
Disconnect the connector on the stirrer.
Is 120 VAC present from the MPB relay
K5 NO contact to AC IN (NT)?
Yes
No
Is 120 VAC present from the MPB
relay K5 NO contact to the EMI
filter board IN2 contact?
Yes
Is 120 VAC present from the MPB
relay K5 NO contact to the EMI
filter board OUT2 contact?
Yes
Is 120 VAC present from the MPB
relay K5 NO contact to the stirrer?
Yes
Is 120 VAC present from the positive contact
to the negative contact of the stirrer?
Yes
Replace
the stirrer.
Is 120 VAC present from
the MPB relay K5 COM
contact to AC IN (NT)?
Yes
Is 0 VDC present from the
MLB connectors J3, pin 9 to
J5, pin 2?
Yes
No
Is 120 VAC present from
the EMI filter board OUT3
contact to AC IN (NT)?
No
Is 120 VAC present from
the EMI filter board IN3
contact to AC IN (NT)?
No
Replace the one-shot
TCO or repair the faulty
wiring from L2 input to
the EMI filter board.
Repair the faulty wiring
from NT input to the EMI
filter board.
No
No
Replace the EMI
filter board.
Repair the faulty wiring
from the EMI filter board
to the stirrer.
No
Repair the faulty
wiring from the MLB
relay K5 NO contact
to the stirrer.
No
No
Replace
the MLB.
Replace
the MPB.
Repair the faulty wiring
from the MPB relay K5
COM contact to the EMI
filter board.
Yes
Replace the EMI
filter board.
Yes