Turbo Chef Technologies 2020 manual Convection System, Blower Motor Speed Controller Bmsc, Heaters

Page 42

2 4 OVEN SYSTEMS

Accessing Parameters

WARNING: DO NOT perform this procedure unless instructed by TurboChef. Changing the parameters to other than those preset by TurboChef can damage critical oven components.

NOTE: “Motor Rated Speed” (07) is RPM of motor before gearbox, not after.

1.Open the right end bell (page A-8).

2.Locate the CMSC (page A-8).

3.Press the M key.

4.Use the and keys to navigate the parameters. See page 40.

5.Press the M key to access the parameter shown on the CMSC display.

6.Use the and keys to manipulate the parameter.

7.Press the M key to return to the parameter selection.

8.Repeat steps 4-7 to manipulate other parameters as needed.

3.Take a resistance reading of the motor windings and use Figure 34 to verify the resistance readings are correct.

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

5.If no voltage is present, ensure the BMSC is operating properly (see below).

6.If BMSC is operating properly, inspect the wire harness for damage or shorts (pages 37-38).

7.If wire harness is intact and undamaged and the BMSC is operating properly, the blower motor is damaged or defective and must be replaced (page A-7 = lower, A-8 = upper).

Blower Motor Speed Controller (BMSC)

The motor controller is proprietary and will only operate the convection motor described above. The motor controller is controlled on command from the I/O control board and a 0-10VDC speed command from the I/O control board. See pages 27-28 for troubleshooting.

The Convection System

This section contains information about and testing procedures for the following components:

-Blower Motor

-Blower Motor Speed Controller (BMSC)

-Heaters

Blower Motor

The convection motor is a brushless AC switch reluctance type. Its top speed is 7100 RPM at 1 HP. The motor is controlled by a proprietary controller.

Testing Procedure

1.Disconnect line voltage from the unit.

2.Make sure the motor spins freely.

Heaters

The back and front convection heaters are rated at 6750 watts at 208 VAC with a resist- ance of 14.4 Ohms. The heaters are controlled by the K4/K5 solid state relay and can be tested in TEST MODE (see page 17).

To

From

Description

Expected Resistance

Black

Brown

Winding (A-B)

2.3-2.8 W

 

 

 

 

Black

White

Winding (A-C)

2.3-2.8 W

 

 

 

 

Red

White

Winding (B-C)

2.3-2.8 W

 

 

 

 

N/A

Green

Windings to

Open

chassis

 

 

 

 

 

 

 

Figure 34: Blower Motor Ohm Chart (Motor Windings)

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Contents TurboChef Technologies, Inc Page For further information, call 800.90TURBOPage Table of Contents Troubleshooting SchematicsOven Systems Important Safety Information Please Read First General Safety InformationReducing Fire Risk Grounding Instructions Power Cord ReplacementPreventing Oven Damage S a F ET Y InformationSpecifications and Installation Page Exterior DimensionsElectrical Specifications ConveyorCertifications Installation InstructionsPackaging Oven ConstructionStacking Ovens Bracket BBInstallation Near Open Heat Source Ventilation Requirements Partition Counter Top / TableCleaning Daily and Weekly Page Daily Cleaning Instructions Approved cleaner, part numberWeekly Cleaning Instructions L E a N I N GRemove Inner Oven Components Clean Oven Components Ready the Oven for Use Standard Oven Operation Page Oven Controls Mode 1 Oven Off Mode 2 Belt Speed SelectCooking a Product Mode 6 Cooling Down Mode 3 WarmingMode 4 Soaking Mode 7 IdleEditing a Cooking Profile Changing a Cooking Profile NameAdjusting the Temperature Adjusting the Top and Bottom AirThis page intentionally Left blank Oven Modes Page Accessing the Fault Count Screen Config ModeSetup Mode Accessing the Setup ModeEdit Modes Select Screen Changing the Display TemperatureUpdating the Firmware Changing the Display LanguageTest Mode Accessing the Heat Control ScreenViewing the Status Indicators Entering a New Serial Number Bottom Display LineInitiating a Burn-In Test Erasing Oven SettingsTo erase oven settings, press L3 , Viewing the Serial NumberOven Systems Page Keypad is an 11-key membrane switch Control SystemOutput 24 VDC is on terminals -V and +V Relay Voltage is applied, the relay isFunctioning normally Relay, Solid State K5/K4 HeatersDisconnect line voltage from the unit Conveyor SystemGear Drive Conveyor Motor Gear Drive Conveyor Motor Speed Controller CmscBlower Motor Convection SystemBlower Motor Speed Controller Bmsc HeatersTroubleshooting Page Overview of Troubleshooting Fault Code DescriptionsFault Code Table RO U B L E S H O OT I N GFault Code Troubleshooting Blower Motor Troubleshooting Troubleshoot the blowers pages Correctly installed?Test the RTD page 22 for resistance/ temperature chart Are all elements heatingIs the solid state Troubleshoot F1 fault pagesTemperature chart Relay functioning Properly?Check Wiring pages YES Clean the airOven clean? Is the oven hot? noReplace the I/O no control board A-8 Is the wiring correct pages 37-40?A-8 Open the right end bell Is the high limit thermostatSettings correctly Correspond with TurboChef settings Troubleshooting F9 Belt Fault Total Belt Run FailureCorrect wiring pages Remove the chain guard page A-4Close proximity Non-Fault Code TroubleshootingRelocate oven to cooler area ObstructionBlower and/or Installed? BMSCs, heaters Correctly reinstallPlates Does the problem Operation And/or wiringCheck wiring from Correct wiringPower? Ribbon cable Board. Correct wiring ifSchematics Page H E MAT I C S RTD H E MAT I C S Cmsc Parameters Appendix Replacing Oven Components Page Replacing Oven Components Part DetailsEnd Bells A-6 A-8 A-4 This page intentionally Left blank Replacing Items Outside of End Bells Figure A-1 Front Oven ComponentsPart Number Hardware Description Figure A-5 Blower Motor Assembly Detail Replacing Items Left End BellPart Number Hardware Description Hardware Part Numbers Replacing Items Right End Bell RTDRTD Page Page For service or information
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