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.
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 CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE AUTOMATIC COOL DOWN 2 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.
SCHEMATIC MODEL 1621-000-EA, 1628-000-A, 1629-000-A Low Profile – 1600 Series Adv Dig Electric S.M.
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 Oven fan will not run POSSIBLE CAUSE Incoming power supply Fuse, 10 A.
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.
Thermocouple probe Oven control Thermocouple Oven control Oven air pressure switch Heat relay Heating elements 6 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. 21Ω. The right thermocouple should read approx. 11Ω.
Intermittent heating Thermal overload of main fan motor(s) Conveyor will not run Power supply Power switch Fuse, 10 Amp. Fuse holder Hi-limit thermostat(s), control box Relay, oven control Control transformer Conveyor motor Capacitor, conveyor motor Switch, conveyor reversing Oven control Conveyor motor runs, but there is no speed display NOTE: Display will indicate “Belt jam” Oven control Low Profile – 1600 Series Adv Dig Electric S.M.
Conveyor motor Oven control 8 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. If the hall effect sensor readings are correct, but there is no speed indicated on the display, replace the oven control.
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. B. C. D. E. Remove control panel top. Disconnect wires from switch making note of wire number and location for reinstallation. Remove air tube from switch assembly. Remove switch from control box.
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.
COOLING FAN MOTOR – REPLACEMENT A. B. C. D. E. Shut off power at main breaker. Remove appropriate control box cover. Remove 4 mounting screws. Unplug electrical connector and remove fan motor. 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.
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. D.
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 LOCATED AT BOTTOM CENTER OF CONTROL BOARD. 3 Set digital control for proper oven cavity and conveyor belt during power-up. A.
GENERAL ADVANTAGE SERIES LETTER PART # DESCRIPTION A B C D E F G H J K L M N O P Q R S 369110 369929 369926 369925 369927 369930 369211 369058 1609 370252 369745 369723 369783 369717 369057 369501 369328 369030 369390 370167 370663** 370166 370662** 370168 370665*** 370169 370664*** Access window assembly Window retainer Window frame bottom Glass, access window Window frame, top Screw, 10-32x1/4 Thumb screw Baffle Oven top Drive cover, R.H. Hinge assy., right Door assy.
GENERAL VIEW Low Profile – 1600 Series Adv Dig Electric S.M.
CONTROL BOX, RIGHT 1621-000-EA, 1628-000-A, 1629-000-A LETTER PART # DESCRIPTION A B 9004646 369767 369792 369769 7004973 369025 370361 369119 369134 370117 369378 369766 369793 369768 7004970 370251 7002976 369192 370485 369368 357107 369013 369014 357107 369431 369507 370241 370360 7005624 370256 369125 369422 370180 370354 370355 369432 370257 369158 370357 370466 Control Box Front RH Firebar Element, Bottom 220V Firebar Element, Bottom 230V Firebar Element, Bottom 240V Mounting Plate Bottom Switch,
CONTROL BOX, RIGHT VIEW Low Profile – 1600 Series Adv Dig Electric S.M.
CONTROL BOX, LEFT 1621-000-EA, 1628-000-A, 1629-000-A LETTER PART# DESCRIPTION A B C D E 7006233 370250 369378 370495 369766 369793 369768 7004970 369767 369792 369769 7004973 7006234 369025 370272 369507 369431 7005624 370485 369368 7002976 369192 370358 Control Box, Back LH Top Assembly LH Cooling Fan Motor 230VAC Bracket Fan RH Firebar Element, Top 220V Firebar Element, Top 230V Firebar Element, Top 240V Mounting Plate, Top Firebar Element, Bottom 220V Firebar Element, Bottom 230V Firebar Element, B
CONTROL BOX, LEFT VIEW Low Profile – 1600 Series Adv Dig Electric S.M.
OVEN BACK 1621-000-EA, 1628-000-A, 1629-000-A 20 LETTER PART# DESCRIPTION A B C D E F G H I J L 369547 369725 369776 369777 369778 369761 369759 1627 369033 370245 369724 Wire form thermostat bulb Fan, clockwise rotation Fan shroud Stand-off Rear wall assy. Motor mount Motor, main fan 220/240V 50 Hz. Duct cap Motor clamp Rear duct Fan, counter-clockwise rotation Low Profile – 1600 Series Adv Dig Electric S.M.
OVEN BACK VIEW Low Profile – 1600 Series Adv Dig Electric S.M.
CONVEYOR 1621-000-EA, 1628-000-A, 1629-000-A LETTER A B C D E F G H I J K L M N O P 22 PART# DESCRIPTION 369830 369002 369362 369314 2114003 369812 369160 369641 369220 369005 369811 369161 369813 369825 370247 370050 369806 369163 Complete conveyor Knob, conveyor tension Belt, 1ft.
CONVEYOR VIEW Low Profile – 1600 Series Adv Dig Electric S.M.
Low Profile – 1600 Series Adv Dig Electric S.M.
