Electrical power is supplied to the oven by either a single phase, 3 conductor
service, or three phase, 4 conductor service.
Single:
Black conductor is hot.
White conductor is hot.
The green conductor is ground.
Three Phase:
Black conductor is hot.
Red conductor is hot.
Orange conductor is hot.
The green conductor is ground.
FAN CIRCUIT
Electrical power is permanently supplied to the normally open contacts of the
main power relay, the main switch 1 A fuse, terminal 1 of the time delay unit, also
through the normally closed hi limit thermostat, to the main power switch.
Closing the main switch enables the 30 minute timer delay relay. The time delay
relay supplies line voltage to the cooling fan motor.
INFRARED HEAT
Closing the main switch supplies line voltage to the coil of the main power relay,
closing the contacts to feed the normally open solid state relays for the top and
bottom heaters.
Power also feeds the primary of the transformer, secondary 16V feeds through a
circuit breaker to the control unit. The control energizes the solid state relays for
the top and bottom heaters feeding voltage to the heating elements.
TEMPERATRE CONTROL Closing the main switch supplies line voltage to the primary of the control
transformer, secondary 16vac is supplied to the control unit which is set to a
desired temperature. The thermocouple will provide varying millivolts to the
control unit. The control unit supplies voltage to the coil of the heater relays at
intermittent intervals, to maintain a desired temperature. The display on the
control unit will signal when the main heater relay is energized.
NOTE: The control unit will also display oven temperature.
CONVEYOR DRIVE
Closing the main switch supplies line voltage to the primary of the control
transformer, secondary 16vac is supplied to the control unit. Setting the control
unit to the desired time, outputs voltages to the conveyor motor.
AUTOMATIC COOL
DOWN
When the machine is started, the time delay unit is energized, permitting the main
fan to operate for approximately 30 minutes after the machine is shut off, to cool
the machine. When the machine is turned off the time delay unit keeps the main
fan energized, maintaining operation of the fan for 30 minutes.
TEMPERATRE CONTROL Closing the main switch supplies line voltage to the primary of the control
CONVEYOR DRIVE
AUTOMATIC COOL
DOWN
Electrical power is supplied to the oven by a three phase, 5 conductor service.
Black conductor is hot.
Red conductor is hot.
Orange conductor is hot.
White conductor is neutral.
The green conductor is ground.
Electrical power is permanently supplied to the normally open contacts of the
main power relay, through a set of noise suppressers, through an EMI filter,
through a 1 A fuse, through the normally closed hi limit thermostat, to the main
power switch. Power is also supplied to the time delay relay. Closing the main
switch enables the 30 minute time delay relay. The time delay relay supplies line
voltage to the cooling fan motor.
Closing the main switch supplies line voltage to the coil of the main power relay,
closing the contacts to feed the normally open solid state relays for the top and
bottom heaters.
Power also feeds the primary of the transformer, secondary 16V feeds through a
circuit breaker to the control unit. The control energizes the solid state relays for
the top and bottom heaters feeding voltage to the heating elements.
transformer, secondary 16vac is supplied to the control unit which is set to a
desired temperature. The thermocouple will provide varying millivolts to the
control unit. The control unit supplies voltage to the coil of the heater relays at
intermittent intervals, to maintain a desired temperature. The display on the
control unit will signal when the main heater relay is energized.
NOTE: The control unit will also display oven temperature.
Closing the main switch supplies line voltage to the primary of the control
transformer, secondary 16vac is supplied to the control unit. Setting the control
unit to the desired time, outputs voltages to the conveyor motor.
When the machine is started, the time delay unit is energized, permitting the main
fan to operate for approximately 30 minutes after the machine is shut off, to cool
the machine. When the machine is turned off the time delay unit keeps the main
fan energized, maintaining operation of the fan for 30 minutes.
Fusion Toaster Service Manual
4
SCHEMATIC – FUSION MODEL: 2030-000-U
208/240V Single Phase Unit - Domestic
Fusion Toaster Service Manual
5
SCHEMATIC – FUSION MODEL: 2032-000-E
208/240V Three Phase Unit - Export
Fusion Toaster Service Manual
6
SCHEMATIC – FUSION MODELS: 2040-000-U & 2040-001-U
208/240V Single Phase Unit - Domestic
Fusion Toaster Service Manual
7
SCHEMATIC – FUSION MODELS: 2041-000-U & 2041-001-U
208/240V Three Phase Unit – Domestic
Fusion Toaster Service Manual
8
SCHEMATIC – FUSION MODELS: 2042-000-E & 2042-001-E
208/240V Three Phase Unit – Export
Fusion Toaster Service Manual
9
TROUBLESHOOTING GUIDE
SYMPTOM POSSIBLE CAUSE EVALUATION
Cooling Fan will not run
Oven will not heat
Fusion Toaster Service Manual
10
Incoming power supply
Fuse has opened
Incoming power supply
Fuse has opened
Hi-limit thermostat
Control Transformer
Switch Pad
Oven Control
Check power cord to ensure it is
plugged into receptacle. Check
circuit breakers. Reset if required.
Call power company if needed.
Check and replace if necessary.
Check power cord to ensure it is
plugged into receptacle. Check
circuit breakers. Reset if required.
Call power company if needed.
Check and replace if necessary.
Check for voltage on both sides of
thermostat. Terminals are normally
closed. If open, wait for oven to cool
down. Once oven has cooled,
contacts should go back to normally
closed position. If thermostat does
not return to normally closed or will
not hold, replace.
Check for main power to the primary
side of the control transformer. If no
voltage is present, trace wiring back
to main power switch. Check for
secondary voltage off of the
transformer 16~26VAC. If there is
no secondary voltage off of
transformer then replace
transformer.
Check that the switch pad is plugged
into the controller. Ensure all
electrical connections are tight.
Check for supply voltage to control
(16~26 VAC). If no voltage is
present, trace wiring back to
transformer. If control voltage is
present, check display to see that
information is displayed on the
screen. If nothing is displayed on
screen, replace controller. If there is
a read-out on the controller, set the
temperature to the maximum setting
(see operations manual). With the
control at the maximum setting,
check for output voltage (5 VDC) to
the solid state relays. If there is a 5
VDC signal to the solid state relays,
proceed to “solid state relays” for
more troubleshooting information. If
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