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ELECTRIC COMBI OVEN - ELECTRICAL OPERATION
Page 37 of 68
ELECTRICAL OPERATION
COMPONENT FUNCTION
1A Relay Board
...............
Takes the inputs from oven control board to operate relays that control
power to the components.
2A Oven Control ..............
Manages all functions of oven operation, takes input signals and
performs outputs as required. Referred to as the CPU board on the
Programable control and the Display/Keypad/CPU board on the manual
controls.
3A Display/Keypad Board
......
Sends signal to the oven control from keypads and door switch. Displays
oven and cooking information (programmable control only).
F1 Fuse
.....................
5A/250V - Protects power supply board/transformer primary “L1 side” (in
series with F8 Fuse).
F2 Fuse .....................
5A/250V - Protects power supply board/1T transformer primary “L2 side”
(in series with F9).
F3 Fuse .....................
2A/250V - Protects the 1T transformer secondary (230VAC) control
circuits to all contactors, fans, motors and solenoids.
F7 Fuse
.....................
5A/600V - Protects cavity fan motor(s) control circuit.
F8 Fuse
.....................
FLQ5 - Protects L2 power from terminal block and power supply board/1T
transformer primary (in series with F1 Fuse).
F9 Fuse
.....................
FLQ5 - Protects L1 power from terminal block and power supply board/1T
transformer primary (in series with F2 Fuse).
1LT Oven Light
...............
Illuminates oven cavity.
1MTR Cavity Vent Motor
.......
Opens and closes oven cavity exhaust port.
2MTR Drain Pump Motor .......
Empties water from steam generator.
3MTR Cooling Fan
............
Exhausts hot air from right side control compartment to cool components.
4MTR Door Motor
.............
Pulls door into and out of lock position.
5MTR Cavity Fan Motor
........
Circulates air through the oven cavity.
6MTR Cavity Fan Motor
........
Circulates air through the oven cavity (20 level only).
7MTR Cooling Fan
............
Exhausts hot air from right side control compartment to cool components
(20 level only).
8MTR Door Motor
.............
Pulls door into and out of lock position (20 level only).
1TC Cavity Probe
.............
Senses the oven cavity temperature and signals the control.
2TC Cooking Probe
...........
Senses the internal product temperature and signals control.
3TC Cavity Probe
.............
Senses the lower oven cavity temperature and signals the control (20
level only).
1SOL Water Injection
Solenoid Valve
...............
Admits water to the injection nozzle in the cavity that sprays onto the
convection heating elements when requested by the oven control or
manually by the operator. This cools the oven temperature or adds a
burst of steam to the cavity in convection mode.