Follett REF Series - Manual (Page 12)

Controller replacement
1. Disconnect power to unit:
a. Push front panel rocker switch to OFF position.
b. Switch circuit breaker to OFF position and disconnect power cord.
2. Remove 4 screws from front panel to access back of controller.
3. Disconnect front panel wiring harness from refrigerator at 5 pin connector.
4. Disconnect wiring from controller back.
5. Push in at center of orange* brackets to release and slide brackets back and off of controller.
6. Push controller out through front of front panel.
7. Gently remove bezel from controller and install on replacement controller.
8. Insert controller through front of panel.
9. Slide brackets onto sides of controller and push against back of panel.
10. Reconnect wiring to controller.
11. Reconnect 5 pin connector to refrigerator wiring harness.
12. Replace front panel, restore power and test operation. Reprogram replacement controller if necessary.
Wiring diagram
BLACK
BLACK
BLACK
RELAY
START
FAN
EVAP.
CONTROLLER
TEMPERATURE
BLUE
120 VAC
M COND.
FAN
LOAD
C
R S
S
COMP
OVER
CONDENSING UNIT
BLACK
L1
2 1
START
CAP.
WHITE
WHITE
L2
12