Turbo Chef Technologies 3240 manual Blower System, Blower Motor Ohm Chart Motor Windings

Page 45

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 1).

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

3.Press the M key.

4.Use the and keys to navigate the parameters.

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.

The Blower System

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

-Blower Motor

-Blower Motor Speed Controller (BMSC)

Blower Motor

The main blowers are 3400 RPM, 3-phase blower motors. The speed of the blower motor is controlled by the voltage frequency applied to the motor windings from the blower motor speed controller (BMSC).

Testing Procedure

1.Disconnect line voltage from the unit.

2.Take a resistance reading of the motor

windings and use Figure 31 to verify the resistance readings are correct.

3.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.

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

5.If BMSC is operating properly, inspect the wire harness for damage or shorts (page 45).

6.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-8 = lower, A-12 = upper).

Blower Motor Speed Controller (BMSC)

The BMSC converts single-phase line voltage (208-240 VAC) to a three-phase output. The speed of the blower motor is controlled by the frequency output of the BMSC. The BMSC receives an input voltage (0-10 VDC) from the I/O control board and adjusts the frequency output to the blower motor.

Testing Procedure

CAUTION: Capacitors on the BMSC may retain charge after power is removed. To discharge capacitors for further safety, short B+ and B- together.

WARNING: DO NOT connect incoming AC power to output terminals U, V, or W or terminals B+ or B-. This will seriously damage the BMSC.

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

To

From

Description

Expected Resistance

Blue

Brown

Winding (A-B)

5.1-5.5 W

 

 

 

 

Blue

White

Winding (A-C)

5.1-5.5 W

 

 

 

 

Brown

White

Winding (B-C)

5.1-5.5 W

 

 

 

 

Blue, Brown, or

Green

Windings to

Open

White

chassis

 

 

 

 

 

 

25

OVEN SYSTEMS

Figure 31: Blower Motor Ohm Chart (Motor Windings)

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Image 45
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Contents Accelerating the World of Cooking TM Page 800.90TURBO For further information, callPage Table of Contents Oven Systems Oven ModesSchematics TroubleshootingSchematic Pin-out Controller Codes Appendix a Replacing Oven ComponentsGeneral Safety Information Important Safety Information Please Read FirstPreventing Oven Damage A F ET Y Instruc TionsPower Cord Replacement Reducing Fire RiskGrounding Instructions I S a F ET Y Instruc Tions Specifications and Startup Page Oven Overview, Front OverviewPower Specifications DimensionsCertifications Oven ConstructionGas Setup Reading the Incoming Gas Pressure StaticReading the Gas Pressure at 100% Flame Reading the Gas Pressure at Minimum Flame Reading the Operating Gas PressureConfirming Proper Closure of all Taps Cleaning Page Your HhC oven Pad, cleaning towels, disposable gloves Daily Cleaning ProceduresFollow the steps below daily to help maintain Message has disappearedL E a N I N G Deep Cleaning ProceduresRemove and Clean the Lower End Panels Remove and Clean the Conveyor requires TWO peopleRemove and Clean the Upper Nozzle Plate Remove and Clean the Right and Left Lower Air DivertersReinstall the Oven Components Clean the Oven InteriorStandard Oven Operation Page Oven Controls Mode 2 Belt Speed Select Mode 1 Oven OffCooking a Product Happens WhenMode 4 Warming Mode 3 LightingMode 5 Soaking Mode 6 CookingMode during which both blowers are reduced Mode 8 IdleTo 30% to save power. All other oven User presses the idle key from ModeAdjust the air speed This page intentionally Left blank Oven Modes Page To access the Config MODE, press the up key Config ModeSmart Card Screen Updating the FirmwareAccessing the Setup Mode Setup ModeAccessing the Test Mode Edit Option ScreenEnable/disable maintenance mode* -Clear the fault counts Test ModeChanging the Display Language Info ScreenBlowers Bottom Display Line Entering a New Serial NumberInitiating a Burn-In Test Erasing all Oven SettingsViewing the Serial Number ConfirmedOven Systems Page Control System Keypad is an 11-key membrane switchPower supply is damaged or defective Or C & no are closed when coilPower Supply 24VDC International +V for 24 VDC with output wiresSmart Card Reader Conveyor SystemThermostat 120ºF Close on Rise Disconnect line voltage from the unitIf the resistance readings are correct Wire harness for damage or shortsVoltage applied to the motor windings TerminalsBlower System Blower Motor Ohm Chart Motor WindingsBurner System VAC installation connect wire a red to wire C blueCheck for 24 VAC leaving the ignition module see , VDC at the modulating valve coilApply power to the ignition module Using a different wire spark cable ensureShut off the gas supply Will isolate the burner spark rod fromTroubleshooting Page Overview of Troubleshooting Fault Code DescriptionsCooking profile RO U B L E S H O OT I N G This fault occurs if the conveyor belt fails to startFault Code Troubleshooting Steps 9-13? Reset maximum and low fire gas pressureOpen the right end bell Properly connected toThis page intentionally Left blank Temperature Burner ignite Cavity temperature?Fault Clear? Replace Wire sparkAdjust the 100% A-14 Check YES Wiring ReplaceAir tube Switch Former have 24 VACIs the white wire Troubleshooting F5 CC Over Temp CC Over TempShorted to Chassis?Check Wiring YES Troubleshooting F6 EC Over Temp EC Over TempYES Is the oven hot? no Open the left end bell. Are the cooling fans running?Troubleshooting F8 High Limit Tripped High Limit Trip Troubleshooting F7 RTD Fault RTD FailureIs the wiring correct page 45? Control board A-8Remove the chain guard page A-6 Troubleshooting F9 Belt Fault Total Belt Run FailureIs line voltage Blower running? Is the wiring A-8 Switch closed?Air switch Air tube Check WiringNon-Fault Code Troubleshooting Correctly reinstall Codes present? Cleaned? Problem starting?Does the problem Operation 29-30?Power? Control board to Correct wiring Display If ribbon cable isCheck wiring from Verify 5 VDC is present A-8 Correct wiringThis page intentionally Left blank Schematics Page CH E Mati CS C H E Mati C S Sche MAT ICS Page Appendix a Replacing Oven Components Page To Replace This Replacing Oven Components103572 No Panel Appendix a Replacing Oven Components This page intentionally Left blank Replacing Items No Panel Removal Required Part Number Hardware Description Hardware Part Numbers Replacing Items Right End Bell Blower Motor, Lower HHC-6520 Key, 3/16 0 Appendix a Replacing Oven Components Gear Drive Assembly DetailX1 each Replacing Items Left End Bell Blower Motor, Upper HHC-6520 Key, 3/16 Replacing Items Burner Compartment Cover Burner Assembly DetailReplacing Items Multiple Panel Removal Required Page Page For service or information

3240 specifications

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