Mini HFD (Model 1) Technical Service Manual
Contents
1. 1189085b ECN 52161 2 Vendo SANDENVENDO AMERICA INC SAFETY WARNINGS The HFD is for indoor use only Do not use near water or in condensing humidity To prevent electric shock or fire do not kink pull or pinch the power cord and insure no equipment is resting on the power cord If the power cord is damaged unplug and replace Do not connect with other plugs Do not use an extension cord When unplugging first turn off the power switch Then pull the plug at the end of the power cord not by pulling the power cord since the cord can be damaged overheat and cause a fire Do not spray water on the HFD It may cause an electric shock or fire Do not touch the power plug switches or other electrical parts with wet hands It can cause an electric shock Periodically check that the plug is pushed in all the way To prevent injuries due to falling objects liquid spills electric shock or fire do not place heavy objects or liquid filled objects on top of the HFD To prevent electric shock or fire do not use volatile or flammable products in or near the HFD When moving the HFD turn the HFD off unplug and allow the unit to cool To prevent glass breakage and injury do not push on the glass Also use proper equipment and lifting techniques Insure the product doesn t tip while it is being moved If a lamp or any glass cracks or breaks turn off the power and discard all food in the HFD Replace lamp glass Remo2. or advise of all of the conceivable ways in which service might be done nor can SandenVendo predict all of the possible hazardous results The safety precautions outlined in this manual provide the basis for an effective safety program Use these precautions along with the service manual when installing or servicing the HFD We strongly recommend a similar commitment to safety by every servicing organization Only properly trained personnel should have access to the interior of the machine This will minimize the potential hazards that are inherent in electrical and mechanical devices SandenVendo has no control over the machine once it leaves the premises It is the owner or lessors responsibility to maintain the Hot Food Display in a safe condition Follow all Safety Rules and Safety Warnings in this manual If you have any questions please contact the Technical Services Department of SandenVendo at 800 344 7216 SAFETY RULES e Read the Safety Warnings before installation or service Test for proper grounding before installing to reduce the risk of electrical shock and fire Turn off power switch and disconnect power cord from wall outlet before servicing Use only fully trained service technicians for Power On servicing Use adequate equipment when moving the HFD Use only authorized replacement parts Be aware of inherent dangers in rocking or tipping the HFD Always turn power off before plugging or unplugging HFD to wall outlet
3. and parse the information It expects to see this format and order of the file The only variables that are allowed to change are the filename menu code the temperature and timer values and the comment at the end of the file The controller shall be shipped from the factory with the default values above Temperatures must be 3 digits timer hour value one digit and timer minute value two digits Any heater circuit s and associated timers may be disabled by entering the following in the programming file example UL x Controller Connectors Modular three prong receptacle 115 VAC power Left and right below are viewed from the front or controller side of the Mini HFD J1 connector Heater and light power J2 connector Sensor signals J1 1 Lower Right Shelf Heater J2 1 Jumpered to J2 2 J1 2 Lower Right Shelf Heater J2 2 Jumpered to J2 1 J1 3 Middle Right Shelf Heater 2 3 Inside Case Ambient Thermistor J1 4 Middle Right Shelf Heater J2 4 Inside Case Ambient Thermistor J1 5 Upper Right Shelf Heater J2 5 Lower Right Shelf Thermistor J1 6 Upper Right Shelf Heater J2 6 Lower Right Shelf Thermistor J1 7 Lower Left Shelf Heater J2 7 Middle Right Shelf Thermistor J1 8 Lower Left Shelf Heater J2 8 Middle Right Shelf Thermistor J1 9 Not used J2 9 Upper Right Shelf Thermistor J1 10 Not used J2 10 Upper Right Shelf Thermistor J1 11 Not used J2 11 Lower Left Shelf T
4. not shown 1161921 Breaker 15A 1178117 Heater 1153213 Controller Membrane Pad 1162225 Power Cord 1189085b ECN 52161 4 Vendo SANDENVENDO AMERICA INC OPERATION Display and Keypad Middle and Upper Shelf Heater Temperature Adjustment and Timers Power Button Lower Left Shelf Heater Lower Right Shelf Heater Temperature Adjustment and Timers Temperature Adjustment and Timers Timer Setting and Operation Note to help prevent keypad damage push keypad buttons only with finger or thumb do not use fingernail utensil tool pen or other object Normal Operation Pressing the power button turns the HFD on or off When controller is off all lamps heaters displays and indicators are off Timers When a timer is off pressing the timer button once sets the countdown timer to the value preprogrammed into the controller Pressing the timer button again within three seconds activates the timer adjustment mode and sets the timer to one hour Each successive press within three seconds adds one hour to the time up to four hours At four hours the next button press cycles the timer back to one hour again Once the timer is activated the LED next to the shelf timer button becomes green The display then reverts to HFD internal ambient temperature display While a timer is on pressing a timer button once displays the remaining time for 4 seconds then shelf temperature for 4 seconds and then the disp
5. Check all terminal connections Failed heating element Check resistance on terminals from heater plates Resistance should be approximately 94 ohms 1189085b ECN 52161 Vendo SANDENVENDO AMERICA INC SCHEMATIC mH 596 Oo gu lt ma Jh gy Bu 5g i 55 OO g o lo a 9 Fl Fi 7395 0124 2 49 3 aans naaw lz j 3 x 2 3 F D A a amp x i 4 i gt lt m ox 2 K eS gt 2 x x Nyi Ga X gt 49 iil ezt me TT 28 23 7 a HOLDBNNOD dZ HOLSIMUBHL 15 HOLSIKYSHL 8 iH EX CESS eaten JHS HOI SHS Left Right as viewed from the front side or controller side of the Mini HFD 1181245 1189085b ECN 52161 9
6. E63 Middle shelf thermistor error open circuit E66 Lower right shelf thermistor error open circuit E90 Unable to read SD card Clear error codes by pressing any key except for E90 error Clearing an error code turns that shelf s heater off Clear the E90 error by pressing the power button then press again to turn HFD on again Loading the SD Card Program in the HFD controller With the HFD on Insert the SD card in the controller s SD card slot until it clicks in place The HFD display with show dashes while the program is loading Loading will take up to 30 seconds Once loaded the display will revert to internal ambient temperature Press don t pull the card to remove it from the slot aaron SD Card Programming The SD card must be formatted in FAT32 preferably by Windows XP instead of Vista It must contain a single file and the file name does not matter 512MB or 1GB cards only The contents must be ASCII text as follows in exactly the format shown 1189085b ECN 52161 6 Vendo SANDENVENDO AMERICA INC Temperature and Timer Programming Format SV01 must be SV01 087A this is the date code month 08 year 7 product b L d A UL 000 2 00 1 00 Upper Left shelf set to 0 F left timer value right timer value ML 000 2 00 2 00 LL 220 1 00 2 00 UR 235 2 00 1 00 MR 235 2 00 2 00 LR 220 1 00 2 00 There can be no spaces or blank lines A line is terminated with a CR LF carriage return linefeed The controller will read the file
7. Vendo SANDENVENDO AMERICA INC MINI HOT FOOD DISPLAY Technical Service Manual MODEL HFDM00001 Table of Contents Commitment to Safety 5 vias a eh aaa 4 Operation seri cei eee 5 8 9 1189085b ECN 52161 1 Vendo SANDENVENDO AMERICA INC A COMMITMENT TO SAFETY The SandenVendo is committed to safety in every aspect of our product design SandenVendo is committed to alerting every user to the possible dangers involved in improper handling or maintenance of our equipment The servicing of any electrical or mechanical device involves potential hazards both to those servicing the equipment and to users of the equipment These hazards can arise because of improper maintenance techniques The purpose of this manual is to alert everyone servicing SandenVendo equipment of potentially hazardous areas and to provide basic safety guidelines for proper maintenance This manual contains various warnings that should be carefully read to minimize the risk of personal injury to service personnel This manual also contains service information to insure that proper methods are followed to avoid damaging the Hot Food Display HFD or making it unsafe It is also important to understand these warnings are not exhaustive SandenVendo could not possibly know evaluate
8. hermistor J1 12 Not used J2 12 Lower Left Shelf Thermistor J1 13 Lights and fans J2 13 Jumpered to J2 14 J1 14 Lights and fans 2 14 Jumpered to J2 13 J2 15 Jumpered to J2 16 J2 16 Jumpered to J2 15 1189085b ECN 52161 7 Vendo SANDENVENDO AMERICA INC TROUBLESHOOTING Unit does not turn on Power cord unplugged No power at outlet Plug HFD cord in outlet Check power output at outlet 115VAC HFD circuit breaker off Remove lower stainless steel panel and check breaker Power cord wire disconnected Check resistance across plug ensure the breaker is on measure resistance across plug terminal line and neutral 160 ohms 2 One or more Xenon lamps off Bulb blown Check at terminal for resistance of 44 ohms 2 Check to ensure bulb is securely installed Replace blown bulb s HFD internal ambient does not reach 150 F One or more heater plates not reaching temperature HFD needs approx 40 minutes to reach temperature at default setting Check plate temperature at controller see controller operation One or more Xenon lamp not functioning Check at terminal for resistance of 44 ohms 2 Check to ensure bulb is securely installed Replace blown bulb s Heater plate not heating Fuse blown on controller Remove controller and check fuses Wires disconnected Remove controller and check all connections at controller
9. lay reverts to the internal ambient temperature display At 14 minutes remaining time the LED blinks yellow When no time remains the LED blinks red plus a brief audible alarm sounds Pressing the timer button next to the blinking red LED clears the alarm and restarts the timer Holding down the Time button then pressing a timer key turns off the timer 1189085b ECN 52161 5 Vendo SANDENVENDO AMERICA INC Converting Temperature from F to or C to F 1 Controller must be off 2 While holding down the TIME button press the On Off button Software revision will be displayed Press and release the TIME button Wait 5 seconds Press any timer key once to change from F to C or C to F Press the On Off button to turn the unit on Verify the display indicates the desired temperature units F or C NOOR WO Heater Temperature Adjustment With controller power off hold down the Time button then press amp release the Power button The left timer button for a shelf decreases the temperature setpoint The right timer button for a shelf increases the temperature setpoint To exit heater temperature adjustment mode press the power button Buttons labeled as timers allow a temperature to be set but have no effect on Mini HFD temperatures Error Codes E30 Inside ambient thermistor error open circuit E67 Lower left shelf thermistor error open circuit E60 Upper shelf thermistor error open circuit
10. ve all glass fragments Carefully inspect all surfaces corners and gaskets to insure all glass fragments have been removed before returning HFD to service Keep HFD out of direct sunlight and away from heat sources Do not hang from the door this may cause injury or electric shock Turn off and unplug HFD before servicing and let HFD cool before cleaning or servicing Use proper tools while servicing Use only authorized replacement parts The HFD temperatures are factory set to meet NSF food safety requirements Changing temperature settings may adversely impact food safety The lamps are an integral part of the food heating system If a lamp is not illuminated the temperatures may not be maintained for food safety 1189085b ECN 52161 3 endo sSANDENVENDO AMERICA INC PARTS 1178854 Lamp Guard 1178877 Lamp 1159513 Lamp Socket 1166955 Side Glass no decal 1180393 Shelf Assembly 1177198 22 Front Door A A gt 1182055 Middle amp Upper Shelf Rack Black 1154538 Caution Hot Label 1158685 Side Gasket 1182066 Bottom Rack Black 1177435 Front J SS Gasket not shown 1165355 Left Decal 1180812 Fan not shown 1178798 Shelf Guard 1178038 Vertical Rear Gasket not shown 1178052 Horizontal Rear Gasket 1165366 Right Decal 1177836 Bottom Shelf Assembly 1153225 31 Controller On back of unit not shown Other item
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