Service Manual for
RCO Speed Oven
20
FAILURE TO INSTALL THE
BLOWER MOTORS PROPERLY WILL CAUSE
THE OVEN TO OVERHEAT AND BECOME A
FIRE HAZARD.
1. Remove the unit from its power source and follow
the proper Lockout/Tagout procedures.
2. Remove the top panel and the side panel of the
defective Blower Motor Assembly. Note: the
right side panel is equipped with a cooling fan.
Disconnect the wires to the cooling pan before
removing the right side panel.
3. Tag and disconnect the Blower Motor Assembly
wires.
4. Remove the Blower Motor Assembly by removing
the nuts that secure the assembly to the inside
chassis of the oven.
5. Compare the blower wheel orientation of the
faulty blower assembly to the replacement blower
assembly. Ensure that they match!
6. Install the replacement Blower Motor Assembly.
7. Referring to the tags or wiring diagram, reconnect
the Blower Motor Assembly wires
BLOWER SPEED MOTOR
E: Emerson motor
R: Regal-Beloit Motor
Convection
Blower Ð Right
L1 Ð E: 1, R: Blue
L2 Ð E: 2, R: White
L3 Ð E: 3, R: Orange
Convection
Blower Ð Left
L1 Ð E: 1, R: Blue
L2 Ð E: 2, R: White
L3 Ð E: 3, R: Orange
T1
ORANGE
ORANG
E
YELLOW
YELLOW
BLUE
BLUE
T2 T3
L1 L2 L3
L1
L2 L3
Blower Motor Assembly Wiring Diagram
8. Briefly restore power to the unit and ensure the
Blower Motor Assembly is operating correctly.
9. Remove the unit from its power source and reattach
all covers and panels. Note: If the right side panel
was removed reconnect the cooling fan wires before
attaching the top cover.
10. Restore the unit to its power source and ensure
that it is operating correctly.
MAGNETRON COOLING FAN
Before performing any service that
involves electrical connection or disconnection
and/or exposure to electrical components,
always follow the Electrical LOCKOUT/TAGOUT
Procedure. Disconnect all circuits. Failure to
comply can cause property damage, injury
or death.
The High Voltage Capacitor
retains a 2.5kV DC charge after the oven has
been disconnected from its power source. The
capacitor must be properly discharged prior
to beginning work on any components in
the high voltage area. Failure to comply can
cause property damage, injury or death. Refer
to the Discharging the High Voltage System
section of the manual for proper instructions
for this procedure.
The Magnetron Cooling Fan is located behind the rear
access panel.
Magnetron
Cooling Fan
Location of Magnetron Cooling Fan