The Conveyor System

This section contains information about the following components, as well as testing procedures:

-Gear Drive (Conveyor Motor)

-Gear Drive (Conveyor Motor) Speed Controller (CMSC)

Gear Drive (Conveyor Motor)

The conveyor motor is a 1610 RPM, 3-phase motor with a built-in Hall Effect Sensor. The speed of the conveyor motor is controlled by the voltage frequency applied to the windings from the CMSC. The Hall Effect Sensor sends a DC pulse back to the control board to verify motor speed. The control board uses these pulses to determine the output DC voltage to the CMSC.

Single-belt HhC 2020 ovens contain one gear drive. Dual-belt ovens contains two gear drives.

Testing Procedure

1.Disconnect line voltage from the unit.

2.Take a resistance reading of the motor windings and use Figure 33 to verify that the resistance readings are correct.

3.If the resistance readings are correct, reconnect the motor wiring and then apply line voltage to the unit and check for voltage applied to the motor windings.

4.If no voltage is present, ensure the CMSC is operating properly (see below).

5.If CMSC is operating properly, inspect the wire harness for damage or shorts.

To

From

Description

Expected Resistance

White

Grey

Winding (A-B)

215-217 W

 

 

 

 

White

Black

Winding (A-C)

215-217 W

 

 

 

 

Grey

Black

Winding (B-C)

215-217 W

 

 

 

 

White, Grey, or

Green

Windings to

Open

Black

 

chassis

 

Figure 33: Conveyor Motor Ohm Chart

6.If the wire harness is intact and undamaged, and the CMSC is operating properly, the gear drive is damaged or defective and must be replaced.

Gear Drive (Conveyor Motor) Speed Controller (CMSC)

The CMSC converts single-phase line voltage to a three-phase output, and controls the speed of the gear drive via frequency output. The CMSC receives an input voltage (0-10 VDC) from the control board and adjusts the frequency output to the gear drive.

Testing Procedure

WARNING: Capacitors within the CMSC can retain charge after power is removed. Exercise extreme caution when handling the terminals.

WARNING: DO NOT connect incoming AC power to output terminals U, V, or W. This will seriously damage the Conveyor Motor Speed Controller.

1.Ensure that no faults appear on the display of the CMSC during oven operation. The control will display the frequency output if the system is operating correctly.

2.Check the input voltage on terminals L1 & L2 (200-240 VAC) and the DC voltage input on terminals 0V & AI (0.1-10 VDC).

3.If no input voltage is present, inspect the wire harness for damage or shorts (pages 37-38).

4.If DC control voltage is not present, check voltage output at I/O board. If no voltage is present at the I/O board, replace the board. J10-A13 to J9-C6 = front belt

J10-A14 to J10-A6 = rear belt.

5.Check ohms of motor (Figure 33).

6.If wire harness is intact and undamaged, the CMSC is damaged or defective and must be replaced.

2 3

OVEN SYSTEMS

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Turbo Chef Technologies 2020 manual Conveyor System, Gear Drive Conveyor Motor, Disconnect line voltage from the unit

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