Antunes, AJ VCT-50 - Manual (Page 15)

VERTICAL CONTACT TOASTER
14 P/N 1010729 Rev. C 05/04
VERTICAL CONTACT TOASTER
15 P/N 1010729 Rev. C 05/04
Problem Possible Cause Corrective Action
Product is over-
toasted or platen
heat is too high or
drop time is too
slow
Temperature set too high. Set temperature control at a lower setting.
Bun adjustment controls set
incorrectly.
Measure bun thickness and set bun adjustment controls
correctly (Fig. 6, page 9).
Buns sticking on release
sheet.
Clean or replace release sheet or conveyor belt wrap.
Conveyor cover assy(s) not
installed.
Install conveyor cover assy(s).
Conveyor belts installed
incorrectly
Install conveyor belt to match diagram in Fig. 8 (page 11).
Be sure that ends of the hooks are facing down.
Defective platen. To check platen:
Use an Ohm meter to test resistance of the platen heater
(disconnect 1 wire to isolate heater). Correct cold resis-
tance for heating element of platen are as follows:
120 Volts, 1750 Watts - 7.8 Ohms
208 Volts, 2550 Watts - 16.2 Ohms
230 Volts, 1900 Watts - 26.5 Ohms
VCT-20 only. The auxiliary heaters are 144.2 Ohms at
208V/300 Watts.
Defective or wrong drive
motor. To check drive motor:
1. Measure resistance of motor coil. Replace motor if coil
measures either open circuit or zero resistance.
2. Mark the drive motor sprocket and count the turns per
minute. Correct drive motor speed is nine (9) turns per
minute for VCT-20; three (3) turns per minute for VCT-
25; one (1) turn per minute for VCT-50.
Defective drive chain or
loose
sprocket.
Check drive chain for kinks, broken or bent links or other
damage. Check motor sprocket and drive sprockets (on
drive shaft); tighten setscrew on flat of shaft if required.
Check for damaged/worn sprockets and replace as
required.
Wiring problem. Check all electrical connections for burns, discoloration
or arcing. Replace all connections or components with
damaged terminals. Replace all damaged wiring with the
same (or higher) rated wire.
Conveyor belt too loose
or missing links (41 links
required when new). When
new, conveyor has 37 large
links and 4 small links.
Remove conveyor belt (page 11). Lay belt flat and count
links. Replace entire belt if links are damaged. If conveyor
belt has too much play, it will jam. Adjust belt length as
described under Servicing the Conveyor Belt (page 10).
TROUBLESHOOTING (continued)