Re Pl Aci N G Th E C On Tr O L L E R Boa Rd S - Conair Thermolator TW-S User Manual

Re pl aci n g th e C on tr o l l e r Boa rd s

The controller boards used in the Thermolator TW-P can be replaced if necessary. Two
main circuit boards make up the controller. One is the display board that contains all the
numeric displays, LEDs and pushbuttons. The other is the main board that contains the
microprocessor, inputs, outputs, and option daughter cards. They are connected with a
20-conductor ribbon cable. Any or all can be independently replaced.
To rem o ve c o nt r o l le r :
1
Disconnect and lockout the main power supply.
2
If replacing the main board, remove all terminal strips. If the daughter cards are
to not be replaced, use a pair of needle-nose pliers to release the daughter cards from
the plastic standoffs. Unplug ribbon cable.
If replacing the HMI board, unplug ribbon cable from the back.
3
Remove the four mounting screws holding the board in place.
4
Remove the board to be replaced.
To rei n st al l t he c o n t r o l le r :
5
If replacing the main board and/or any of the daughter cards, please check care-
fully that all the jumpers and DIP switches on the new part are set exactly the
same as the old part. If the old part is not available for reference, all factory jumper
settings are shown on the electrical control prints.
6
If replacing the main board, insert all terminal strips. Replace all daughter cards
on plastic standoffs. Take care to ensure that daughter card connections to the main
board are properly aligned. Reattach ribbon cable.
If replacing HMI board, reattach ribbon cable from the back.
7
Replace the four mounting screws as shown in the pictures above in step 3.
8
The user parameters are stored on the main board, and will be set to their fac-
tory defaults. If the main board was replaced, please be sure to re-configure
parameters to control operation of the TCU as desired.
IMPORTANT: Always refer to the
wiring diagrams that came with
your Thermolator to locate specific
electrical components. Illustrations
in the User Guide are intended to
be representative only.
Contact Conair
Parts and Service
Phone: 800-458-1960
From outside of the
United States,
Call: 814 437 6861
M ai nte na nc e I 5-13