TurboChef Eco - Impingement System; Blower Motor; Blower Motor Speed Controller (BMSC); Heater Elements

Impingement System
The impingement system is designed to rapidly
heat, clean, and recirculate air into the cook cavity.
This section contains information about the
following components:
• Blower motor
• Blower motor speed controller (BMSC)
• Heater elements
• Jetplate
• Stirrer motor and assembly
For information on accessing and removing parts,
see the Appendix.
Blower Motor
The blower motor is a brushless AC-switch
reluctance type and spins counter clockwise. Its top
speed is 7100 RPM at 1 HP, and it is controlled by
a proprietary controller.
The blower motor can be tested in Test Mode (see
page 18).
Blower Motor Speed Controller (BMSC)
The motor controller is proprietary and will only
operate the motor described above. It is controlled
via (0-9.5) VDC speed command from the Sage
control board and can be tested in Test Mode
by testing the blower motor. For additional
troubleshooting, see page 47.
Heater Elements
The heaters are sheathed-style and rated at 2250
watts at 208 VAC, with a resistance of 14.4 Ohms.
The heaters are controlled by the K4/K5 solid state
relay, and can be tested in Test Mode (see 18).
Jetplate
The bottom and top jetplates channel air generated
from the blower motor into the cook cavity.
CAUTION: The top jetplate is ceramic. Be
careful when removing or reinstalling it.
Stirrer Motor and Assembly
The stirrer is responsible for evenly distributing
hot air and microwave that enters the cook cavity
from the top. The stirrer is driven by a motor that
remains on during a cook cycle or when the oven is
in Test Mode. The stirrer motor turns off when the
oven is not cooking.
The stirrer motor can be tested in Test Mode (see
page 18).
Troubleshooting
The following faults may occur in relation to the
convection system:
• F1: Blower (see page 47)
• F2: Low Temp (see page 48)
• F7: Thermo (see page 51)
• F8: Heat Low (see page 52)
• F9: Cook Cavity Over Temp (see page 52)
The following cooking performance issues may
occur in relation to the convection system:
• Food not cooking properly (see page 60).
OVEN SYSTEMS
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