Filter
Top Products
2. Control Board Layout
Note: Fuse at position F101 on board is not currently used. The board can function
without this fuse.
SW 135
Display
Setpoint
SW 134
Raise
Setpoint
SW 133
Lower
Setpoint
SW 131
Energy
Saving/
Service
Button
SW 13
Manual
Defrost
LED 13
Lit for
Negative
Values
LED 14
Temperature
and Alarm
Display
(brown) Compressor Relay
(red) Evaporator Fan Relay
(orange) Defrost Heater Relay
Relay Wiring Harness (K311)
Thermistor Wiring Harness (K151)
Front
K311 (6 pin)
Relay Wiring
Harness
K51 (5 pin)
(not used)
K101 (3 pin)
Transformer
K151 (10 pin)
Thermistor
Wiring
Harness
K361 (9 pin)
(not used)
F101
3 Amp Fuse
(not used)
Relays
(not used)
Chip Revision
Board Part
Number
Board Part
Number
Rear
(gray) Clogged Filter Sensor
(orange) Defrost Thermistor
(black) Cabinet Thermistor
(white) Jumper Wire (limits access to settings and
diagnostics menu - not present on all units)
(light blue) High Pressure Switch