Related Manuals for Lang Purple
Summary of Contents for Lang Purple
- Page 1 Product Manual Lang "Purple" Computer Operation Service Troubleshooting Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203 Part Number: 60850-32 Phone: 425-349-2400 Fax: 425-349-2483...
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Page 2: Table Of Contents
TROUBLESHOOTING ........................12 OPERATIONAL SEQUENCE....................12 GAS CONVECTION OVEN ..................12 TROUBLESHOOTING ........................13 ELECTRIC CONVECTION OVEN ................13 TROUBLESHOOTING ........................14 INDEX ............................... 15 Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203 Part Number: 60850-32 Phone: 425-349-2400 Fax: 425-349-2483... -
Page 3: Control Panel
CONTROL PANEL Light Switch Power Switch Display "Tier" Lamps Product Buttons 1 - 0 Manual Program Button Shelf Buttons A - E "Read/Clear" Button Temperature Recall Button... -
Page 4: Table Of Contents
PROGRAMMING DEFINITIONS CONTROL PANEL BUTTONS 1 -O Product Buttons. These are the buttons where the product programs are stored. Pressing a Product Button will heat the oven to the programmed temperature. Shelf Buttons. The control is capable of timing each shelf individually. A - E Pressing a Product Button then a Shelf Button will start the countdown timer. -
Page 5: Control Panel
PROGRAMMING FAN FUNCTION The convection fan has two programmable options. Fan On (Fan 1) runs the convection fan continuously. Fan Off (Fan 0) leaves the fan off until heat is called for by the control. In a convection oven, the fan must come On whenever the heat comes On. -
Page 6: Programming
PROGRAMMING PROGRAMMING SEQUENCE The following procedure describes a standard programming sequence. Each programming prompt is shown in the coloum DISPLAY and the required program entry is shown in the coloum ACTION. The Control allows for a 3 second delay between each button push, if a delay of longer than 3 seconds has occurred, the programming sequence must be re-entered. -
Page 7: Programming
PROGRAMMING Press the flashing E button to "Exit" this Product Button program. 000 F Select another Product Button to program or press the Read/Clear button to Prod "Lock" the new program(s) into memory and exit the programming mode. End of programming sequence EntEr PROGRAMMING HINT After inputing a program entry, press Shelf Button A to "advance"... -
Page 8: Programming
PROGRAMMING OPTIONAL PROGRAMMING CODES Below are codes which will configure the display to an optional readout or or aid in the operation of the oven. The readout must display "ENTER" before the computer will accept any programming code. If the readout displays any other word, turn the oven Off then back On before beginning the programming sequence. -
Page 9: Programming
PROGRAMMING PROGRAMMING CODES CODE DESCRIPTION PRESS OPERATIONAL Recall time remaining on a shelf Shelf Cancel a shelf timer R/C,R/C,Shelf "One Button Loading" R/C,P,P,P,P,P Cancel "One Button Loading" R/C HOLD Multiple products per shelf On R/C,1,2,3,8,7,6 Multiple products per shelf Off R/C,6,7,8,3,2,1 DISPLAY MODES Countdown timer display... -
Page 10: Service
SERVICE MODEL STRAPPING INSTRUCTIONS The control panel of the Lang "Purple" computer must be configured to match the model of oven it is being installed in. To configure the control panel, change the arrangement of the Strapping Bars located at the bottom of the circuit board just above the ribbon connection. -
Page 11: Service
SERVICE CIRCUIT BOARD IDENTIFICATION... -
Page 12: Troubleshooting
TROUBLESHOOTING The following text will assist in determining which of the two circuit boards (control panel or microprocessor) may have failed. Locate the symptom in the left column, then refer to the possible causes in the center column, then how to test for cause in the right column. -
Page 13: Temperature Sensor Values
TEMPERATURE SENSOR VALUES SENSOR RESISTANCE This measurement is taken after the Temperature Sensor is unplugged from the connector pins located on the back of the control panel (see page 9). Do not take this measurement while the Temperature Sensor is connected to the conrtol panel circuit board. -
Page 14: Troubleshooting
TROUBLESHOOTING OPERATIONAL SEQUENCE GAS CONVECTION OVEN Power switch turned on. Power to oven light switch. 120 volts to rows A and B of 24 pin terminal block. 120/24 volt transformer energized. 24 volts to rows C and D of 24 pin terminal block. 24 volts to center connector of Back-up toggle switch. -
Page 15: Troubleshooting
TROUBLESHOOTING 4b). Back-up toggle switch On Circuit 1 24 volts (Blu # 12) through door switch to motor contactor coil. Motor contactor closes, door switch closed, motor starts. Motor centrifugal switch closes (for heat circuit). Circuit 2 24 Volts to Back-up thermostat. Temperature set on Back-up thermostat 24 volts from Back-up thermostat (Red # 21B) through safety thermostat, through motor centrifugal switch, to main valve coil of gas combination valve. -
Page 16: Troubleshooting
TROUBLESHOOTING Back-up relay closes. 24 volts to Back-up Thermostat 24 volts to terminal 2 on coil of motor conatactor. Motor contactor closes. Motor starts. 24 volts through motor contactor points (from jumper on coil) to terminal 1 on coil of heat contactor. -
Page 17: Index
INDEX TIER, 3, 4 Tier Lamp, 4 Tier lamps, 3 control panel, 8 Tier" Light, 4 COOKING CURVE, 2, 3, 4 cooking temperature, 3, 4 cooking time, 2, 4 countdown timer, 2 Display, 4 FAN FUNCTION, 3, 4 Light Switch, 4 MANUAL PROGRAM, 2 Manual Program Button, 4, 6 Power Switch, 4...