OWNER’S MANUAL
MODEL HST13 – AUTOTOAST™ VERTICAL TOASTER
135168CH7 RV042910
6
Copyright
©
2010 Marshall Air Systems, Inc.
All Rights Reserved.
PROBLEM:
3. Heater platens are hot; conveyor belts do not move.
SOLUTION:
A. Check that conveyor switch is on and good.
B. Make sure there are no loose connections at the switch.
C. Check the fuse in the adjustment side panel. Replace with type AGC 1.5 amp fuse if necessary.
D. Check motor to make sure it is connected properly.
E. Check conveyor speed control setting(CH7, CH7B models). Adjust as needed.
F. Check for voltage to speed control board (CH7, CH7B models). Check for voltage to the motor
(CH7C, CH7D models).
G. CH7, CH7B models, check for red light on the speed board. If red light is lit, the motor is working
too hard or in a stalled state.
H. Some speed boards have a green light (CH7, CH7B models). If green light is lit then power is
going to the board.
I.
Make sure the input voltage switch(es) of the speed board is set at 230V.
J.
CH7C, CH7D check capacitor for proper motor connections.
K. CH7, CH7B check for DC voltage out of board to motor.
L.
Check all wiring to motor for loose connectors.
M. Check drive system for loose chain or sprockets. Tighten set screws as needed.
N. Check belts are not slipping on rollers. Check belts for tears and that the spring tension is
applying pressure to the upper roller.
PROBLEM:
4. Variable Speed Motor (#
90 VDC motor) Not Operating (CH7, CH7B Models)
SOLUTION:
A. Verify correct voltage to unit and motor.
B. Make sure conveyor switch (#
) has power flowing through it.
D. Check for DC voltage to motor out of board (90VDC Motor).
E. If red light on board is on, disconnect load from motor by removing chain. If it goes out, look for
conveyor binding. If it stays lit, replace motor –there is probably a gearbox problem.
F. Check DC amp draw to motor by putting meter in series with motor. (Pull wire from A1 on board,
put one lead to A1, other to wire pulled from A1.) When red LED on board is on, DC amp reading
should be .23 amp approximately.
G. If green LED is on and red is not, make sure that there is varying DC voltage out of board to motor
(terminals A1 & A2 on board) as speed control knob is increased or decreased.
H. Check ohm reading at motor cord plug (Range between 50-80 Ohms).
I. Check for oil leaks on motor signifying bad seal or overheating that has taken place. In either
case, motor should be replaced.
PROBLEM:
5. Circuit Board (#
) not working properly. (CH7, CH7B Models)
DO NOT ADJUST POTS ON BOARD WITHOUT CONTACTING FACTORY!
SOLUTION:
