SERVICE MANUAL
GARLAND CLAMSHELL GRILLS WITH PRODUCT RECOGNITION
PART #4526396 (03/30/10)
Page 38
DISPLAYED�
MESSAGE
MEANING
POSSIBLE�CAUSES
POSSIBLE�SOLUTION
HEAT�ERROR�������������������������
PLATEN/GRILL
No temperature increase
within 425 seconds after
dropping below set point
Shorted temperature sensor
Solid state relays are not on
Loss of power to platen
Operational procedures not being
followed (e.g. no scraper and squeegee)
Continuity check to ground
Verify harness connections to controller
Check operation of main contactors
Review procedures when message is displayed
MOTOR�GEN�
ERR
One of five errors
associated with the motor
or motor control board
has occurred
Communication problem between motor
control board and the main controller
Motor control board timing is interrupted
or not correct
Check cabling between encoder & motor speed
controller & between motor speed controller & main
controller
Cycle main power OFF and ON
MOTOR�ENCOD�
ERR
The encoder has “jumped”
or missed a pulse
Loose wirning on encoder
Loose encoder connection at the motor
Unstable power source
Check wiring connections
Check wiring and assembly of encoder
Check incoming voltage
MOTOR�OVER�
AMPS
Motor current exceeded
4 amps (software is
protecting motor speed
control board)
Interference within lift mechanism
Check for platen obstructions
Clean excess grease from actuator shafts
& replace seals if necessary
Clean grill daily per operational instructions
MOTOR�CLS�
STOP
The encoder has detected
31 counts below the
“zero” reference point
Lower limit switch not in correct position
or defective
Platen adjustment has become loose
Recalibrate lower limit switch operation to the correct
“zero” position, check for proper limit switch operation
Check fasteners on key lift components
MOTOR�SPD�ERR
Controller detects that
the platen is not moving
Actuator failure
Loose encoder or motor connections
Check actuator function and replace if defective
Check all connections on motor speed control board
and the actuator motor
MOTOR�BUSLV�����������������������
ERR
The DC voltage on the
motor control board
dipped below 95 vdc
Incoming voltage drop from AC source
Transient voltage issue
Recycle main power to grill to reset motor speed
controller settings
Measure incoming voltage where motor connects to
motor control board
MOTOR�BUSSV�����������������������
ERR
The DC voltage on the
motor control board
is either under or over
preset limits
Incoming voltage drop or surge from AC
source
Transient voltage issue
Recycle main power to grill to reset motor speed
controller settings
Measure incoming voltage where motor connects to
motor control board
MOTOR�PINCH�
ERR
The maximum or
minimum platen speed
difference is greater than
a preset value
Obstruction to platen movement
Interference with the lift mechanism
Encoder error
Check for platen obstructions
Clean excess grease from actuator shafts and replace
seals if necessary
Check encoder wiring connections
Clean grill daily per operational instructions
MOTOR�MSE���������������������������
ERR
The motion values for
the platen have been
exceeded
Obstruction to platen movement
Interference with the lift mechanism
Encoder error
Check for platen obstructions
Clean excess grease from actuator shafts and replace
seals if necessary
Check encoder wiring connections
Clean grill daily per operational instructions
MOTOR�SPEED������������������
ERR
No level speed after 750
msec
Obstruction to platen movement
Interference with the lift mechanism
Encoder error
Check for platen obstructions
Clean excess grease from actuator shafts and replace
seals if necessary
Check encoder wiring connections
Clean grill daily per operational instructions
ERROR MESSAGES/TROUBLESHOOTING
�
(continued)
Summary of Contents for MWE3S
Page 2: ......
