Alto-Shaam Vector VMC-H2 Service Manual
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Alto-Shaam Vector VMC-H2 Service Manual

Multi-cook oven
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See also: Service Manual , Operator's Manual
MN-39158
REV.03
11/18
EN
alto-shaam.com
Vector™ Multi-Cook Oven
Structured Air Technology™
Service Manual
VMC-H2
VMC-H3
VMC-H4
VMC-H2H
VMC-H3H
VMC-H4H

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  • Page 1 Service Manual Vector™ Multi-Cook Oven VMC-H2 VMC-H2H VMC-H3 VMC-H3H VMC-H4 VMC-H4H Structured Air Technology™ MN-39158 REV.03 11/18 alto-shaam.com...

  • Page 2: Manufacturer's Information

    © Copyright 11/18 by Alto-Shaam, Inc. All rights reserved. This manual or any portion thereof may not be reproduced or used in any manner whatsoever without the express written permission of Alto-Shaam, Inc. Trademarks All trademarks referenced in this documentation are the property of their respective owners.

  • Page 3: Foreword

    Call 800-558-8744 to reach our 24-hour emergency service call center for immediate access to local authorized service agencies outside standard business hours. The emergency service access is provided exclusively for Alto-Shaam equipment and is available throughout the United States through Alto-Shaam’s toll free number.
  • Page 4 OREWORD Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 5: Table Of Contents

    Manufacturer’s Information ......2 Foreword Alto-Shaam 24/7 Emergency Repair Service ....3 Table of Contents Safety The Meaning of Signal Words .
  • Page 6 ABLE OF ONTENTS Maintenance Maintenance Schedule ......57 How to Clean the Oven......58 Testing How to Test the Cooling Fans .

  • Page 7: Safety

    AFETY The Meaning of Signal Words Technical content produced by Alto-Shaam contains signal words where needed. These signal words must be obeyed to reduce the risk of death, personal injury, or equipment damage. The meaning of these signal words is explained below.

  • Page 8: Safety Precautions

    AFETY Safety Precautions Before you begin Read and understand all instructions in this manual. Electrical precautions Obey these electrical precautions when using the appliance: Connect the appliance to a properly grounded outlet. Do not use the appliance if ▪ it is not properly grounded. Consult an electrician if there is any doubt that the outlet used is properly grounded.
  • Page 9 Alto-Shaam of all liability. To prevent serious injury, death or property damage, have the appliance ▪...
  • Page 10 AFETY Personal Protective Wear the following Personal Protective Equipment (PPE) while cleaning the Equipment (PPE) appliance: Protective gloves ▪ Protective clothing ▪ Eye protection ▪ Face protection ▪ Service Technician Only trained personnel are permitted to service or repair the appliance. Service technicians must be knowledgeable in current codes and standards as stated by the Training appropriate agencies, such as:...

  • Page 11: Operation

    PERATION How to Turn On and Turn Off the Oven Before you begin The oven must be connected to electric power. Turning on the oven To turn on the oven, do the following. Step Action the main disconnect switch to the ON position. Press the ON/OFF button .

  • Page 12: How To Update The Interface Board (Ib)

    PERATION How to Update the Interface Board (IB) Before you begin The chambers should be off (not preheated). ▪ Do not remove the USB drive during the update process. ▪ You will need a USB drive with the updated firmware. ▪...
  • Page 13 PERATION Continued from previous page Touch the Update IB icon The Enter Pass Code screen displays. Enter the pass code Touch the green check mark USB Functions Enter Pass Code 1 2 3 Load 4 5 6 Update IB Config H4-XX.XX 7 8 9 7 8 9...

  • Page 14: How To Update The Control Board (Cb)

    PERATION How to Update the Control Board (CB) Before you begin The chambers should be off (not preheated). ▪ Do not remove the USB drive during the update process. ▪ You will need a USB drive with the updated firmware. ▪...
  • Page 15 PERATION Continued from previous page Touch the Update CB icon The Enter Pass Code screen displays. Enter the pass code Touch the green check mark USB Functions Enter Pass Code 1 2 3 Load 4 5 6 Update IB Update CB Config Ver X.X H4-XX.XX...

  • Page 16: How To Load Configuration Files

    PERATION How to Load Configuration Files Before you begin The chambers should be off (not preheated). ▪ Do not remove the USB drive during the update process. ▪ You will need a USB drive with the configuration files. ▪ You will need to know the service pass code. ▪...
  • Page 17 PERATION Continued from previous page Touch the Load Config icon The Enter Pass Code screen displays. Enter the pass code Touch the green check mark USB Functions Enter Pass Code 6 7 0 2 # 1 2 3 Load 4 5 6 Update IB Update CB Config...
  • Page 18 PERATION This page intentionally left blank Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 19: Components

    OMPONENTS Component Identification Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 20: Chamber Identification

    OMPONENTS Chamber Identification Components will be identified in accordance with the chamber numbering illustrated here. VMC-PHD-001875 Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 21: Front Panel Identification

    OMPONENTS Front Panel Identification VMC-PHD-001879 Ref. Description Check fans indicator light ON/OFF button USB port Control panel display Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 22: Back Panel Identification

    OMPONENTS Back Panel Identification VMC-PHD-001883 Ref. Description Cooling Fans/Filters Main disconnect switch Electrical supply cord Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 23: Component Access Panels Identification

    OMPONENTS Component Access Panels Identification VMC-PHD-001887 Ref. Description Provides access to Left service panel Heating elements, catalyst, and thermocouples Circuit breaker access panel Circuit breakers Top service panel Electrical components Right service panel Blower motors and cooling fans Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03...

  • Page 24: H4-Electrical Component Identification

    OMPONENTS H4—Electrical Component Identification VMC-PHD-001891 Ref. Description Ref. Description Check fans indicator light switch Terminal blocks Terminal boards Interface board Main disconnect switch Control board Circuit breakers (heating ele- Relays ments) Variable Frequency Drive (VFD) Circuit breakers (control) Solid State Relay (SSR) Wye filter (CE models only) 12VAC transformer Line filter (CE models only)

  • Page 25: H3-Electrical Component Identification

    OMPONENTS H3—Electrical Component Identification VMC-PHD-001895 Ref. Description Ref. Description Check fans indicator light switch Terminal blocks Terminal boards Interface board Main disconnect switch Control board Circuit breakers (heating ele- Relays ments) Variable Frequency Drive (VFD) Circuit breakers (control) Solid State Relay (SSR) Wye filter (CE models only) 12VAC transformer Line filter (CE models only)

  • Page 26: H2-Electrical Component Identification

    OMPONENTS H2—Electrical Component Identification VMC-PHD-001899 Ref. Description Ref. Description Check fans indicator light switch Terminal blocks Terminal boards Interface board Main disconnect switch Control board Circuit breakers (heating ele- Relays ments) Variable Frequency Drive (VFD) Circuit breakers (control) Solid State Relay (SSR) Wye filter (CE models only) 12VAC transformer Line filter (CE models only)

  • Page 27: Electrical Components

    OMPONENTS Electrical Components Check Fans Indicator Light Switch The contacts close at or above 130°F (54°C) ▪ VMC-PHD-001903 Terminal Blocks for Electrical Supply Non-CE TB 1 TB 1 TB 2 TB 2 TB 3 VMC-PHD-001907 TB 1 TB 2 TB 3 TB N Vecto r™...

  • Page 28: Main Disconnect Switch

    OMPONENTS Main Disconnect Switch VMC-PHD-001911 Circuit Breakers (Heating Elements) CB 1 - Chamber 1 CB 1 - Chamber 1 CB 2 - Chamber 2 CB 2 - Chamber 2 CB 3 - Chamber 3 CB 3 - Chamber 3 CB 4 - Chamber 4 CB 1 - Chamber 1 CB 2 - Chamber 2 VMC-PHD-001915...

  • Page 29: Variable Frequency Drive (Vfd)

    OMPONENTS Variable Frequency Drive (VFD) WARNING: Electric shock hazard. Do not disassemble the VFD. VMC-PHD-001919 Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 30: Solid State Relay (Ssr)

    OMPONENTS Solid State Relay (SSR) Heater element control. One SSR for each chamber. VMC-PHD-001923 Ref. Description L1 terminal, AC line voltage into the SCR T1 terminal, AC load voltage to the heating element Call for heat indicator light A2 (-) terminal, DC control voltage from the control board to the SSR A2 (+) terminal, DC control voltage from the control board to the SSR Vecto r™...

  • Page 31: 12Vac Transformer

    OMPONENTS 12VAC Transformer The transformer provides a voltage signal to the control board. The signal allows the control board to determine the incoming line voltage. Primary: 1700 Ohms ▪ Secondary: 6 Ohms ▪ 240 VAC VMC-PHD-001927 12VDC Power Supply Supplies DC voltage to the control board and the ON/OFF switch. Vo Adj VMC-PHD-001935 Ref.

  • Page 32: Terminal Blocks

    OMPONENTS Terminal Blocks (VFDs and Cooling Fans) VMC-PHD-001939 Ref. Description TB 4 - L2/N TB 5 - L1 TB 6 - L2/N (switched) Ground Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪...

  • Page 33: Interface Board

    OMPONENTS Interface Board VMC-PHD-001943 Ref. Description BATT Clock battery LCD display ribbon cable Control board communication Touch overlay ribbon cable 4 GB micro SD card USB connection ON/OFF board LED 1 RS485 communication LED 2 RS485 communication Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03...

  • Page 34: Control Board

    OMPONENTS Control Board (CB) TELCO VFD SIEMENS VFD ON VMC-PHD-001947 Ref. Description Ref. Description Ref. Description Drive 1 communication Jumper LED 9 Chamber 2 call for heat Input signals Jumper LED 10 Chamber 3 call for heat Lights Not used LED 11 Chamber 4 call for heat Input from 12VDC power Input from chamber...
  • Page 35 OMPONENTS Relays AZ 22 AZ 22 VMC-PHD-001951 Ref. Description Ref. Description RL-3 (H3 only) Common terminal RL-1, T9C, 240VAC coil Coil terminal Input to the control board for the check fan indicator light Coil—10.90 K Ohm RL-2, AZ 22, 12VDC coil Normally open terminal Blowers/fan Coil—155 Ohm...
  • Page 36 OMPONENTS Circuit Breakers (Control) CB 5 - L1 CB 6 - L2/N VMC-PHD-001955 Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 37: Left Service Panel Identification

    OMPONENTS Left Service Panel Identification VMC-PHD-001963 Ref. Description Chamber heating element Catalyst High limit switch Chamber air temperature probe Speaker Door switch Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 38: Left Service Panel Components

    OMPONENTS Left Service Panel Components Chamber Heating Element 18 Ohms VMC-PHD-001979 Catalyst VMC-PHD-001983 Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...
  • Page 39 OMPONENTS High Limit Switches Resettable Contacts open at 572°F (300°C) VMC-PHD-001987 Ref. Description Reset button Temperature bulb Chamber Air Temperature Probe K Type Thermocouple 100°C 4.096 MV 100°F 1.521 MV 200°C 8.138 MV 200°F 3.820 MV 300°C 12.209 MV 300°F 6.094 MV VMC-PHD-001991 Vecto r™...
  • Page 40 OMPONENTS Speaker 8 Ohms VMC-PHD-001995 Door Switch Door closed 0 Ohms; 0 VDC across terminals 1 and 2 of connector P3 on the ▪ control board. Door open Infinite Ohms; 8 VDC across terminals 1 and 2 of connector P3 on the ▪...

  • Page 41: Right Service Panel Identification

    OMPONENTS Right Service Panel Identification VMC-PHD-002003 Ref. Description Blower motor Cooling fans Filter—cooling air Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 42: Right Service Panel Components

    OMPONENTS Right Service Panel Components Blower Assembly 4.3 Ohms VMC-PHD-002007 Fans Impedance protected ▪ 240 Volt ▪ 581 Ohm ▪ VMC-PHD-002011 Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪...
  • Page 43 OMPONENTS Filter—Cooling Air VMC-PHD-002015 Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 44: Internal Components Identification

    OMPONENTS Internal Components Identification VMC-PHD-002019 Ref. Description Chamber light Filters Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 45: Internal Components

    OMPONENTS Internal Components Chamber Light 12 VDC VMC-PHD-002023 Filters VMC-PHD-002027 Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...
  • Page 46 OMPONENTS This page intentionally left blank Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 47: Theory

    HEORY Standby State Background The main disconnect switch is in the ON position, the display is not illuminated. WARNING: Electric shock hazard. Voltage is present at the following components: Terminal blocks • Circuit breakers • Heater elements, one wire on each element •...

  • Page 48: On State

    HEORY On State Background The main disconnect switch is in the ON position, the display is illuminated. The logo will appear along with the firmware versions on the display. After five seconds, the LCD will display the home screen. WARNING: Electric shock hazard.

  • Page 49: Preheat State

    HEORY Preheat State Background Pressing Preheat will automatically begin preheating all chambers up to their pre-programmed default temperature setpoints. It should take approximately 10-15 minutes for the oven to reach temperature. The Temps icon in the User Configuration screen allows the user to change the individual chamber preheat temperatures.

  • Page 50: Idle State

    HEORY Idle State Background As each chamber reaches its temperature setpoint, it will start a 5-minute countdown to allow the chamber temperature to stabilize. The chamber blower fans are driven at 30% rotation speed by the VFDs. Component State Control panel LCD backlight Heaters ON, maintaining the temperature setpoint requirements...

  • Page 51: Cooking State

    HEORY Cooking State Background Each chamber is independently controlled. The current chamber is indicated by the check mark on the display. Opening the door will pause the cooking cycle. The oven will keep track of how long the door is open and automatically add time to any current cooking cycle to compensate for the temperature loss.

  • Page 52: Cooking State Complete

    HEORY Cooking State Complete Background At the end of the cooking cycle, the oven buzzer/speaker sounds an alert and the chamber light flashes. The chamber blower fans are driven at 30% rotation speed by the VFDs. Component State Control panel LCD backlight Heaters ON, maintaining the temperature setpoint...

  • Page 53: Rapid On/Off State

    HEORY Rapid ON/OFF State Background Each chamber transitions to the rapid ON/OFF state if the chamber temperature is greater than 20°F (11°C) from the temperature setpoint. The chamber blower fans are driven at 70% rotation speed by the VFDs. Component State Control panel LCD backlight...

  • Page 54: Cool Down State

    HEORY Cool Down State Background The oven automatically turns on the blowers for the cool down process. With the oven door open, the oven takes approximately 2 hours to cool down to a chamber temperature of 140°F (60°C). The screen displays a cool down prompt and requests for the door to be opened. The oven shuts down once the cool down is complete.

  • Page 55: Cool Down State Complete

    HEORY Cool Down State Complete Background The oven transitions to the OFF state after 20 minutes. Component State Control panel LCD backlight Heaters Cooling fans Blower Buzzer / speaker Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪...
  • Page 56 HEORY This page intentionally left blank Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 57: Maintenance

    AINTENANCE Maintenance Schedule Daily Before cleaning, ensure the oven is cooled down and off—inside of chamber 140°F (60°C) or less. Remove any spills with disposable paper wipes or a damp cloth. Wipe the outside of the oven with a damp cloth. Use stainless steel cleaner on the outside of the oven.

  • Page 58: How To Clean The Oven

    AINTENANCE How to Clean the Oven Before you begin WARNING: Electric shock hazard. Set the main disconnect switch to the OFF position to remove electric power from the appliance. CAUTION: Burn hazard. Allow the oven, utensils, and racks to cool before cleaning. CAUTION: Corrosive materials hazard.
  • Page 59 AINTENANCE Continued from previous page Weekly cleaning To clean the oven weekly, do the following. procedure Step Action the main disconnect switch to the OFF position. Make sure the oven is cool—chambers are less than 140°F (60°C). VMC-TS-001426 Spray the exterior areas of the oven with stainless steel polish. NOTICE Use only non-caustic cleaners.
  • Page 60 AINTENANCE Continued from previous page Monthly cleaning To clean the oven monthly, do the following. procedure Step Action the main disconnect switch to the OFF position. Make sure the oven is cool—chambers are less than 140°F (60°C). VMC-TS-001426 Remove the cooking racks and jet plates CAUTION: Personal injury hazard.
  • Page 61 AINTENANCE Continued from previous page Cleaning the filters Remove the filters VMC-TS-001590 Clean the filters in a dishwasher.  NOTE: Replace the filters at least once a year. Re-install the filters. the main disconnect switch to the ON position when complete. Result The oven is now clean.
  • Page 62 AINTENANCE This page intentionally left blank Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 63: Testing

    ESTING How to Test the Cooling Fans Before you begin The oven must be connected to electric power. ▪ Make sure the top cover and side panels are installed when testing the cooling ▪ fans. Procedure To test the cooling fans, do the following. Step Action Touch...
  • Page 64 ESTING Continued from previous page Touch the down arrow . The second Service screen displays. Service S e r v i c e Service e r v i c e Diagnostics Pass Code B l o w e r s l o w e r s F a n s a n s...

  • Page 65: How To Test The Blower Motors

    ESTING How to Test the Blower Motors Before you begin The oven must be connected to electric power. Procedure To test the blower motors, do the following. Step Action Touch the gear icon . The User Configuration screen displays. User Configuration Ready to Cook Preheat Bacon...
  • Page 66 ESTING Continued from previous page Touch the down arrow . The second Service screen displays. Service S e r v i c e Service e r v i c e Diagnostics Pass Code B l o w e r s l o w e r s F a n s a n s...
  • Page 67 ESTING Continued from previous page Touch the home icon to stop the blower motors and return to the home screen.  NOTE: Touching the cancel icon will also stop the blower motors and return to the Service screen. Air Speed Select a chamber to test its blower Enter air speed (10 - 100%) Chamber 1...

  • Page 68: How To Test The Heaters

    ESTING How to Test the Heaters Before you begin The oven must be connected to electric power. Procedure To test the heaters, do the following. Step Action Remove the left side service panel. VMC-TS-003860 Touch the gear icon . The User Configuration screen displays. User Configuration Ready to Cook Preheat...
  • Page 69 ESTING Continued from previous page Enter the pass code 6702 Touch the green check mark . The first Service screen displays. Enter Pass Code Service 6 7 0 2 # 1 2 3 4 5 6 Diagnostics Pass Code 7 8 9 <...
  • Page 70 ESTING Continued from previous page Measure the amp draw while the heater is on. The amperage draw of a functioning heater element is 10–15 amps. WARNING: Electric shock hazard. Use caution when testing line voltage. The heater will automatically stop after one minute of operation. See topic The Chambers will not Heat if the heaters do not turn on.

  • Page 71: How To Calibrate A Chamber Thermocouple

    ESTING How to Calibrate a Chamber Thermocouple Before you begin The oven must be connected to electric power. ▪ Make sure you have a multimeter with thermocouple attachment. ▪ Make sure the jet plates are installed. ▪ You will need to know the service pass code. ▪...
  • Page 72 ESTING Continued from previous page Touch the Service icon . The Enter Pass Code screen displays. User Configuration Enter Pass Code Enter Pass Co 1 2 3 4 5 6 Service unds Time 7 8 9 < 0 Logs Recipes VMC-TS-003839 Enter the pass code...
  • Page 73 ESTING Continued from previous page Touch the chamber that needs to be calibrated . The Enter Offsets screen displays. Enter the offset number from the calculation. To determine the offset number, subtract the smaller number from the larger number. If the multimeter number is larger, add a “+” in front of the resulting number.
  • Page 74 ESTING This page intentionally left blank Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 75: Troubleshooting

    ROUBLESHOOTING Error Messages Background This section is provided for the assistance of qualified and trained service technicians only and is not intended for use by untrained or unauthorized service personnel. Failure to observe this precaution may void the warranty. Message Meaning Action required ERR: HIGH LIMIT 1...

  • Page 76: The Oven Will Not Power Up

    ROUBLESHOOTING The Oven will not Power Up Before you start Remove the circuit breaker service panel on the left side of the oven. ▪ Move the circuit breakers to the OFF position, then move the circuit breakers to ▪ the ON position and retry operation. If the oven still does not power up, follow the troubleshooting procedure below.
  • Page 77 ROUBLESHOOTING Measure the DC voltage across the + and - terminals Repair or replace the wiring from connector P6 at the control board. Is the voltage the supply to P6 of the control approximately 12VDC? board. Measure the resistance between connector J7 of the user interface Are LEDs 1 and 2 on the user interface board and board and the control board...

  • Page 78: The Screen Will Not Turn On

    ROUBLESHOOTING The Screen will not Turn On Before you start Move the main disconnect switch to the OFF position, then move the main ▪ disconnect switch to the ON position. If the striped screen displays, but the oven will not turn on when the ON/OFF button is pressed, follow the troubleshooting procedure below.

  • Page 79: The Screen Will Not Turn Off

    ROUBLESHOOTING The Screen will not Turn Off Before you start Press and hold the ON/OFF button. ▪ WARNING: Electric shock and arc flash hazard. Use caution when measuring line voltage. Wear Personal Protective Equipment (PPE). Did the red LED illuminate Inspect the ON/OFF wire harness.

  • Page 80: The Screen Is Solid White

    ROUBLESHOOTING The Screen is Solid White Move the main disconnect switch to the OFF position, then move the main disconnect switch to the ON Continue with troubleshooting. position. Is the oven screen solid white? Replace the interface board (IB). Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03...

  • Page 81: The Screen Is Not Responsive

    ROUBLESHOOTING The Screen is not Responsive Before you start Move the main disconnect switch to the OFF position, then move the main ▪ disconnect switch to the ON position. If the icons display on the screen, but do not respond when touching them, follow the troubleshooting procedure below. Inspect the touch panel cable for proper integrity and proper connection at the J8 connector on the Repair or replace the cable as...

  • Page 82: The Screen Has Icons, But No Text

    ROUBLESHOOTING The Screen has Icons, but no Text Before you start Move the main disconnect switch to the OFF position, then move the main ▪ disconnect switch to the ON position. USB drive formatted to FAT 32. ▪ Load the force load file and autoconfig file onto a USB drive formatted to FAT 32.

  • Page 83: The Striped Screen And Blank Screen Go Through A Continuous Loop

    USB drive into the P2 Load the interface board (IB) force load file. Call connector on the interface Replace the interface board Alto-Shaam for the force load file. Does the screen board (IB). Reload the files. (IB). respond? Does the screen work properly? The touch screen is working properly.

  • Page 84: The Striped Screen Is Locked

    USB drive formatted to FAT 32. ▪ Load the interface board (IB) force load file. Call Alto-Shaam for the force load file. Move the main disconnect switch to the OFF position. Insert the Check USB drive for the correct USB drive into the USB port on the oven. Move the files and format.

  • Page 85: The Oven Control Does Not Respond

    ROUBLESHOOTING The Oven Control does not Respond Before you start Remove the service panel of the left side of the oven. ▪ Move the main disconnect switch to the OFF position, then move the main ▪ disconnect switch to the ON position. Locate LEDs D21 and D22 on the control board (CB).

  • Page 86: Chambers Do Not Heat - Control Voltage

    ROUBLESHOOTING Chambers do not Heat – Control Voltage Before you start Locate the temperature high limit switches and reset any tripped high limit switch as required. Locate the circuit breakers and reset any tripped circuit breaker as required. Put the oven into a heating mode. Remove the service panel.

  • Page 87: The Chambers Do Not Heat - Element Line Voltage

    ROUBLESHOOTING The Chambers do not Heat – Element Line Voltage How the heating The heating elements require two phases of line voltage to operate. One phase element line voltage originates at the main disconnect switch and is connected through a terminal works board and then directly to the heating element.
  • Page 88 ROUBLESHOOTING At the main disconnect switch, place the meter lead on the phase that connects directly to the heating element. Place the second meter lead on the load side terminal of the circuit breaker for the phase that connects to the SSR.

  • Page 89: Chamber Blower Fans Do Not Operate

    ROUBLESHOOTING Chamber Blower Fans do not Operate Before you start Put the oven into a heating mode. ▪ Remove the service panel. ▪ Locate the circuit breakers and reset any tripped circuit breaker as required. ▪ WARNING: Electric shock and arc flash hazard. Use caution when measuring line voltage.

  • Page 90: Chamber Lights Do Not Illuminate

    ROUBLESHOOTING Chamber Lights do not Illuminate Before you start Remove the service panel. WARNING: Electric shock and arc flash hazard. Use caution when measuring line voltage. Wear Personal Protective Equipment (PPE). Is the door open? Open the door. Measure DC voltage at the + and - terminals of Check the wiring from the power connector P6 on the control board.

  • Page 91: The Check Fan Indicator Light Is Illuminated

    ROUBLESHOOTING The Check Fan Indicator Light is Illuminated Before you start Put the oven into a heating mode. ▪ Remove the service panel. ▪ WARNING: Electric shock and arc flash hazard. Use caution when measuring line voltage. Wear Personal Protective Equipment (PPE). The indicator light is Test the operation of the Inspect the cooling fan...
  • Page 92 ROUBLESHOOTING Measure AC voltage across TB3-L2 and L1. Does the Repair or replace the voltage correspond to the wires from the blower/fan voltage printed on the relay to TB3-L2. serial number tag? Measure AC voltage across Reset the circuit breaker. TB3-L1 and L2.

  • Page 93: The Cooling Fan(S) Do Not Operate

    ROUBLESHOOTING The Cooling Fan(s) do not Operate Before you start Put the oven into a heating mode. WARNING: Electric shock and arc flash hazard. Use caution when measuring line voltage. Wear Personal Protective Equipment (PPE). Is LED2 on the control board illuminated? Replace the control board.

  • Page 94: What To Do If The Fan Indicator Light Illuminates

    ROUBLESHOOTING What to do if the Fan Indicator Light Illuminates Procedure If the fan indicator light illuminates, do the following. Step Action Turn off the oven and allow it to cool. Remove the filters. VMC-TS-001795 Clean the filters in a dishwasher. Re-install the filters.

  • Page 95: Assembly/Disassembly

    SSEMBLY ISASSEMBLY Removing and Installing the Blower Motor Before you begin The oven must be disconnected from electric power. ▪ Have a replacement blower motor. ▪ Procedure To remove and install the blower motor, do the following. WARNING: Electric shock hazard. Disconnect the appliance from electric power before servicing the appliance.
  • Page 96 SSEMBLY ISASSEMBLY Continued from previous page the insulation around the motor. Remove the three mounting screws and remove the motor and blower wheel from the housing. VMC-TS-002942 Install the new motor with the three mounting screws. Tape all the seams in the insulation.

  • Page 97: Removing And Installing A Heater Element

    SSEMBLY ISASSEMBLY Removing and Installing a Heater Element Before you begin The oven must be disconnected from electric power. ▪ Have a replacement heater element. ▪ Procedure To remove and install a heater element, do the following. WARNING: Electric shock hazard. Disconnect the appliance from electric power before servicing the appliance.
  • Page 98 SSEMBLY ISASSEMBLY Continued from previous page the insulation around the heater element panel. Move the insulation away from the heater element panel. Remove the heater element panel VMC-TS-002961 Remove the heater element from the oven. Install the new heater element into the oven.

  • Page 99: Schematics

    CHEMATICS VMC-H2 / VMC-H2H—60 Hz Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 100: Vmc-H3 / Vmc-H3H-60 Hz

    CHEMATICS VMC-H3 / VMC-H3H—60 Hz Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...

  • Page 101: Vmc-H3 / Vmc-H3H-208-240V 60 Hz (3 Ph)

    CHEMATICS VMC-H3 / VMC-H3H—208–240V 60 Hz (3 Ph) Continued on next page Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...
  • Page 102 CHEMATICS Continued from previous page Continued on next page Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...
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  • Page 105: Vmc-H4 / Vmc-H4H-60 Hz

    CHEMATICS VMC-H4 / VMC-H4H—60 Hz Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...

  • Page 106: Vmc-H2 / Vmc-H2H-220-240V 50 Hz

    CHEMATICS VMC-H2 / VMC-H2H—220-240V 50 Hz Continued on next page Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...
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  • Page 109: Vmc-H2 / Vmc-H2H-380-415V 50 Hz (3 Ph)

    CHEMATICS VMC-H2 / VMC-H2H—380-415V 50 Hz (3 Ph) Continued on next page Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...
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  • Page 112: Vmc-H3 / Vmc-H3H-220-240V 50 Hz (1 Ph)

    CHEMATICS VMC-H3 / VMC-H3H—220-240V 50 Hz (1 Ph) Continued on next page Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...
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  • Page 115: Vmc-H3 / Vmc-H3H-380-415V 50 Hz (3 Ph)

    CHEMATICS VMC-H3 / VMC-H3H—380-415V 50 Hz (3 Ph) Continued on next page Vecto r™ H Ser i es Service Manual MN-39 158 Re v 03 11/1 8 ▪ ▪ ▪ ▪...
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  • Page 118: Vmc-H4 / Vmc-H4H-380-415V 50 Hz

    CHEMATICS VMC-H4 / VMC-H4H—380-415V 50 Hz Continued on next page Vecto r™ H Se ries S er vi c e Man u a l MN - 39158 Rev 03 11 /18 ▪ ▪ ▪ ▪...
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  • Page 121: Warranty

    ARRANTY Warranty Introduction Alto-Shaam, Inc. warrants to the original purchaser only, that any original part found to be defective in material or workmanship will be replaced with a new or rebuilt part at Alto-Shaam's option, subject to provisions hereinafter stated.
  • Page 122 No person except an officer of Alto-Shaam, Inc. is authorized to modify this warranty or to incur on behalf of Alto-Shaam any other obligation or liability in connection with Alto-Shaam equipment.

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