Turbo Chef Technologies 3240 Conveyor System, Smart Card Reader, Thermostat 120ºF Close on Rise

Page 43

3.If coil resistance is correct (585 k W):

a)Apply line voltage to the unit.

b)Check for 24 VAC at the coil of the relay when the unit is calling for heat.

c)Check the state of the contacts.

-If the normally open contacts (7 & 4 -or C & NO) are closed and the -normally closed contacts (7 & 1 or C -& NC) are open when coil voltage is -applied, the K4 relay is functioning -normally.

-If the normally open contacts (7 & 4 -or C & NO) are not closed and/or the -normally closed contacts (7 & 1 or C -& NC) are not open when coil voltage -is applied, the K4 relay is -malfunctioning and must be replaced.

4.If the coil resistance is incorrect, replace the K4 relay (page A-14).

RTD

The RTD is a resistance temperature detector used to detect the cavity temperature.

Testing Procedure

1.Disconnect the RTD from the I/O control board.

2.Place the RTD in a bowl of ice water for 2 minutes.

3.Take a resistance reading of the RTD.

4.If RTD resistance is not 100 W, RTD is defective and must be replaced.

NOTE: Use Figure 29, page 24 to determine resistance readings at temperatures other than freezing.

Smart Card Reader

The smart card reader allows the oven operator to load a menu/firmware update from a smart card. A menu that already exists in the oven can also be saved to a smart card. For instructions, see page 15.

Speaker

The speaker is separate from the control board, and provides audible feedback to the oven oper- ator whenever a key is pressed or a fault occurs.

Thermostat - 120ºF (Close on Rise)

The cooling fan thermostat actuates the cooling fans when the temperature in the left end bell reaches 120ºF (49ºC).

Wire Harness

The wire harness distributes power to the oven’s electrical components. See page 45 for a schematic.

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 1550 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.

Conveyor ovens with a split-belt configuration will contain separate gear motors and speed con- trollers for each belt.

Testing Procedure

1.Disconnect line voltage from the unit.

2.Take a resistance reading of the motor windings and use Figure 30, page 24 to verify that the resistance readings are correct.

23

OVEN SYSTEMS

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Contents Accelerating the World of Cooking TM Page 800.90TURBO For further information, callPage Table of Contents Oven Systems Oven ModesAppendix a Replacing Oven Components TroubleshootingSchematics Schematic Pin-out Controller CodesA F ET Y Instruc Tions Important Safety Information Please Read FirstGeneral Safety Information Preventing Oven DamageReducing Fire Risk Power Cord ReplacementGrounding Instructions I S a F ET Y Instruc Tions Specifications and Startup Page Oven Overview, Front OverviewOven Construction DimensionsPower Specifications CertificationsReading the Incoming Gas Pressure Static Gas SetupReading the Gas Pressure at 100% Flame Reading the Operating Gas Pressure Reading the Gas Pressure at Minimum FlameConfirming Proper Closure of all Taps Cleaning Page Message has disappeared Daily Cleaning ProceduresYour HhC oven Pad, cleaning towels, disposable gloves Follow the steps below daily to help maintainL E a N I N G Deep Cleaning ProceduresRemove and Clean the Right and Left Lower Air Diverters Remove and Clean the Conveyor requires TWO peopleRemove and Clean the Lower End Panels Remove and Clean the Upper Nozzle PlateReinstall the Oven Components Clean the Oven InteriorStandard Oven Operation Page Oven Controls Happens When Mode 1 Oven OffMode 2 Belt Speed Select Cooking a ProductMode 6 Cooking Mode 3 LightingMode 4 Warming Mode 5 SoakingUser presses the idle key from Mode Mode 8 IdleMode during which both blowers are reduced To 30% to save power. All other ovenAdjust the air speed This page intentionally Left blank Oven Modes Page Updating the Firmware Config ModeTo access the Config MODE, press the up key Smart Card ScreenEdit Option Screen Setup ModeAccessing the Setup Mode Accessing the Test ModeInfo Screen Test ModeEnable/disable maintenance mode* -Clear the fault counts Changing the Display LanguageBlowers Bottom Display Line Entering a New Serial NumberConfirmed Erasing all Oven SettingsInitiating a Burn-In Test Viewing the Serial NumberOven Systems Page Control System Keypad is an 11-key membrane switch+V for 24 VDC with output wires Or C & no are closed when coilPower supply is damaged or defective Power Supply 24VDC InternationalDisconnect line voltage from the unit Conveyor SystemSmart Card Reader Thermostat 120ºF Close on RiseTerminals Wire harness for damage or shortsIf the resistance readings are correct Voltage applied to the motor windingsBlower 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 coilWill isolate the burner spark rod from Using a different wire spark cable ensureApply power to the ignition module Shut off the gas supplyTroubleshooting Page Fault Code Descriptions Overview of TroubleshootingCooking 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 Properly connected to Reset maximum and low fire gas pressureSteps 9-13? Open the right end bellThis page intentionally Left blank Replace Wire spark Cavity temperature?Temperature Burner ignite Fault Clear?Former have 24 VAC A-14 Check YES Wiring ReplaceAdjust the 100% Air tube SwitchChassis? Troubleshooting F5 CC Over Temp CC Over TempIs the white wire Shorted toOpen the left end bell. Are the cooling fans running? Troubleshooting F6 EC Over Temp EC Over TempCheck Wiring YES YES Is the oven hot? noControl board A-8 Troubleshooting F7 RTD Fault RTD FailureTroubleshooting F8 High Limit Tripped High Limit Trip Is the wiring correct page 45?Remove the chain guard page A-6 Troubleshooting F9 Belt Fault Total Belt Run FailureCheck Wiring Switch closed?Is line voltage Blower running? Is the wiring A-8 Air switch Air tubeNon-Fault Code Troubleshooting 29-30? Cleaned? Problem starting?Correctly reinstall Codes present? Does the problem OperationA-8 Correct wiring Control board to Correct wiring Display If ribbon cable isPower? Check wiring from Verify 5 VDC is presentThis 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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