Document #: LIN_GO_SM_IMPLOPRO_S1600_INTL_4605727 – 9/20
Section 5
Troubleshooting
PROBLEM
CAUSE
CORRECTION
Intermittent heating
Thermal overload of main fan
and burner blower motors
The main fan motors and the burner blower motors are equipped with
internal 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 run
Power supply
Check for supply voltage at terminals L1 and L2. If voltage is not present,
check breakers.
Power switch
Check continuity between switch terminals. Replace switch as needed.
Fuse, 10A
Check and/or replace.
Fuse holder
Check and/or replace.
Hi-limit thermostat(s), control
box
Check for voltage on both sides of the switch. Terminals are normally
closed. If open, reset and test for proper operation. If thermostat will not
hold, and the control box temperature is not exceeding 140°F (60°C),
replace thermostat.
Relay, oven power
Check for line voltage to the relay coil. If voltage is not present, trace
wiring back to the hi-limit thermostat. If voltage is present, check to
ensure contacts are closing. Replace relay as needed.
Control transformer
Check for line voltage supply to the primary of the control transformer. If
no voltage is present, trace wiring back to the oven power relay. If voltage
is present, check for 24 VAC at the transformer secondary. If there is
primary voltage, but no secondary voltage, replace control transformer.
Conveyor motor
Check for line voltage supply to the conveyor motor at wire #28 to neutral.
If no voltage is present, trace wiring back to the oven power relay. If
voltage is present and the motor will not run, check the motor windings
for opens or shorts. WITH POWER OFF: Check the motor windings as
follows:
Grey to black - 116Ω
Grey to brown - 116Ω
Brown to black - 230Ω
Capacitor, conveyor motor
Check for shorts or grounds. Replace capacitor as needed.
WARNING: Capacitor has a stored charge, discharge before testing.
Switch, conveyor reversing
Check continuity between switch terminals. Replace switch as needed.
Oven control
If there is supply voltage to the motor and the motor, capacitor, and
reversing switch check good, replace the oven control.
Conveyor motor runs, but
there is no speed display
NOTE: Display will indicate
“BELT JAM”
Oven control
Check for output voltage from the oven control to Hall Effect sensor
(sensor is located in conveyor motor). Measure voltage at the motor
connector, red wire and yellow wire. Voltage should be approx. 10 VDC.
If no voltage is present, trace wiring back to oven control. If there is no
voltage present at the oven control, replace the oven control.
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. 25 – 100 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.
