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SERVICE MANUAL
(INTERNATIONAL)
IMPINGER CONVEYOR OVENS
MODEL 1621-000-EA, 1628-000-A, 1629-000-A
WITH PUSH BUTTON CONTROLS
Lincoln Foodservice Products, LLC
1111 North Hadley Road
Fort Wayne, Indiana 46804
United States of America
Phone : (800) 374-3004
U.S. Fax: (888) 790-8193 • Int’l Fax: (260) 436-0735
Technical Service Hot Line
(800) 678-9511
www.lincolnfp.com
1600AdDgElecExp REV: 1/8/07
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SEQUENCE OF OPERATIONS IMPINGER ELECTRIC LOW PROFILE ADVANTAGE (WITH PUSH BUTTON CONTROL) MODEL 1621-000-EA 230/400 VAC 50HZ MODEL 1628-000-A 220/380 VAC 50HZ MODEL 1629-000-A 224/415 VAC 50HZ POWER SUPPLY Electrical power to be supplied to the oven by a five conductor service. Brown conductor is hot. Black conductor is hot. Black conductor is hot. Blue conductor is neutral. Green conductor is ground. CONTROL BOX When the temperature in either one of the con
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SCHEMATIC MODEL 1621-000-EA, 1628-000-A, 1629-000-A Low Profile – 1600 Series Adv Dig Electric S.M. – Int’l 3
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TROUBLESHOOTING GUIDE MODEL 1621-000 EA 230/400 VAC 50 HZ 3 PHASE MODEL 1628-000 A 220/380 VAC 50 HZ 3 PHASE MODEL 1629-000 A 240/415 VAC 50 HZ 3 PHASE NOTE: When checking components on left side of unit, be sure to check for proper connections in power connector, (marked P. C. on schematic diagram) located inside motor cover. SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not Incoming power s
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Cooling fan thermostat(s) Check the cooling fan thermostat. (Thermostat closes at 49°C and opens at 38°C). With the cooling fan thermostat preheated, check for continuity. If switch is open, replace. Fuse, 3 A., cooling fan Check, replace if necessary. Fuse holder Check, replace if necessary. Cooling fan(s) Supply voltage should now be at these motors. If voltage is present, check motor for opens, shorts or grounds. WITH POWER OFF: Check for locked rotor. Oven will not heat Fan switch
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Thermocouple probe Check to be sure that the thermocouple is securely connected to the oven control. If the thermocouple is connected to the oven control, and the control indicates “LP FAIL” or “RP FAIL”, disconnect the thermocouple from the oven control and measure the resistance of the thermocouple. The left thermocouple should read approx. 21W. The right thermocouple should read approx. 11W. If these readings are not achieved, replace the thermocouple. If these readings are correct,
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Intermittent heating Thermal overload of main The main fan motors are equipped with internal fan motor(s) thermal protection and will cease to operate if overheating occurs. As the motors overheat and then cool, this will cause the units to cycle on and off intermittently. Improper ventilation or lack of preventive maintenance may cause this problem. Also, most of the problems listed under “Oven will not heat” can cause intermittent failure. Conveyor will not Power supply Check for su
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Conveyor motor If there is voltage supplied to the hall effect sensor, check for a frequency output from the hall effect sensor. Measure frequency across the yellow and white wires at the motor connector. Frequency readings should be approx. 20 – 525 Hz. If these readings are not achieved, replace the conveyor motor. If the readings are achieved, proceed. Oven control If the hall effect sensor readings are correct, but there is no speed indicated on the display, replace the oven control
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REMOVAL, INSTALLATION & ADJUSTMENTS MODEL SERIES 1621-000-EA, 1628-000-A, 1629-000-A CAUTION! BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY. AIR PRESSURE SWITCH – REPLACEMENT A. Remove control panel top. B. Disconnect wires from switch making note of wire number and location for reinstallation. C. Remove air tube from switch assembly. D. Remove switch from control box. E. Install new switch in reverse
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C. Remove 2 wires, note wire number and location. D. Remove locknut on backside of fuse holder and push out. E. Reinstall in reverse order and check system operation. THERMOSTAT, HIGH LIMIT, OVEN CAVITY – REPLACEMENT A. Shut off power at main breaker. B. Remove appropriate control box cover. Remove motor cover and remove oven back to access high limit thermostat sensing bulb. C. Remove wires from thermostat, note wire numbers for reinstallation. D. Remove mounting nut from high limit
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COOLING FAN MOTOR – REPLACEMENT A. Shut off power at main breaker. B. Remove appropriate control box cover. C. Remove 4 mounting screws. D. Unplug electrical connector and remove fan motor. E. Reassemble in reverse order and check system operation. MAIN FAN MOTOR – REPLACEMENT A. Shut off power at main breaker. B. Shut off gas supply and remove gas line and manifold lines from back of oven. C. Remove screws from motor cover housing and lift off.
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TIME DELAY RELAY – REPLACEMENT A. Shut off power at main breaker. B. Remove control box cover. C. Remove all wires from time delay relay, note wire numbers and location for reinstallation. D. Remove mounting screw and remove time delay relay. E. Reassemble in reverse order and check system operation. HEATING ELEMENT – REPLACEMENT A. Shut off power at main breaker. B. Remove appropriate control box cover. C. Remove wires from heating element, note all wire numbers for reinstallation.
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NOTES: All bake times should be within 10 seconds of set bake time, cavity temperature should be calibrated to within 5° of set temperature. For temperature calibration, allow oven temperature to stabilize at least for 30 minutes. 2 BEFORE APPLYING POWER TO OVEN, ENSURE PROPER VOLTAGE JUMPER SETTING FOR 120V or 240V, AND THE 50 HZ / 60HZ JUMPER SETTING IS CORRECT. JUMPERS ARE LO
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GENERAL ADVANTAGE SERIES LETTER PART # DESCRIPTION A 369110 Access window assembly B 369929 Window retainer C 369926 Window frame bottom D 369925 Glass, access window E 369927 Window frame, top F 369930 Screw, 10-32x1/4 G 369211 Thumb screw H 369058 Baffle J 1609 Oven top K 370252 Drive cover, R.H. L 369745 Hinge assy., right M 369723 Door assy., small N 369783 Latch, spring O 369717 Finger retaining bracket P
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GENERAL VIEW Low Profile – 1600 Series Adv Dig Electric S.M. – Int’l 15
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CONTROL BOX, RIGHT 1621-000-EA, 1628-000-A, 1629-000-A LETTER PART # DESCRIPTION A 9004646 Control Box Front RH B 369767 Firebar Element, Bottom 220V 369792 Firebar Element, Bottom 230V 369769 Firebar Element, Bottom 240V C 7004973 Mounting Plate Bottom D 369025 Switch, Blower Air E 370361 Motor Assembly L/P CE ADV F 369119 Fuse holder 3 Pole G 369134 Fuse, 50 A. H 370117 Terminal Block 5 Pole I 369378 Cooling Fan Motor 230VAC
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CONTROL BOX, RIGHT VIEW Low Profile – 1600 Series Adv Dig Electric S.M. – Int’l 17
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CONTROL BOX, LEFT 1621-000-EA, 1628-000-A, 1629-000-A LETTER PART# DESCRIPTION A 7006233 Control Box, Back LH B 370250 Top Assembly LH C 369378 Cooling Fan Motor 230VAC D 370495 Bracket Fan RH E 369766 Firebar Element, Top 220V 369793 Firebar Element, Top 230V 369768 Firebar Element, Top 240V F 7004970 Mounting Plate, Top G 369767 Firebar Element, Bottom 220V 369792 Firebar Element, Bottom 230V 369769 Firebar Element, Bottom 240V H 70
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CONTROL BOX, LEFT VIEW Low Profile – 1600 Series Adv Dig Electric S.M. – Int’l 19
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OVEN BACK 1621-000-EA, 1628-000-A, 1629-000-A LETTER PART# DESCRIPTION A 369547 Wire form thermostat bulb B 369725 Fan, clockwise rotation C 369776 Fan shroud D 369777 Stand-off E 369778 Rear wall assy. F 369761 Motor mount G 369759 Motor, main fan 220/240V 50 Hz. H 1627 Duct cap I 369033 Motor clamp J 370245 Rear duct L 369724 Fan, counter-clockwise rotation
