Control Board Layout - Hoshizaki HUR40A(-D) Service Manual

2. Control Board Layout

K311 (6 pin)
Relay Wiring
Harness
Board Part
Number
Chip Revision
K251 (5 pin)
(not used)
K101 (3 pin)
Transformer
K151 (10 pin)
Thermistor
Wiring
Harness
F101
3 Amp Fuse
(not used)
Note: Fuse at position F101 on board is not currently used. The board can function
without this fuse.
Rear
Board Part
Number
K361 (9 pin)
(not used)
Relay Wiring Harness (K311)
Thermistor Wiring Harness (K151)
SW 135
Display
Setpoint
LED 123
Lit for
Negative
Values
LED 124
Temperature
and Alarm
Display
Relays
(not used)
(brown) Compressor Relay
(red) Evaporator Fan Relay
(orange) Defrost Heater Relay
(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
22
Front
SW 134
Raise
Setpoint
SW 133
Lower
Setpoint
SW 132
Manual
Defrost
SW 131
Energy
Saving/
Service
Button