Document #: LIN_GO_SM_IMPLOPRO_S1600_INTL_4605727 – 9/20
Section 5
Troubleshooting
PROBLEM
CAUSE
CORRECTION
Oven will not heat – Serial
Number L31479 and Above
Oven power relay
Check for line voltage to the relay coil. If no voltage is present, trace wiring
back to the control box hi-limit thermostat(s). If voltage is present, check
to ensure contacts are closing. Replace relay as needed.
Fuse, burner, 3A
Check, replace if necessary.
Fuse holder
Check, replace if necessary.
Air pressure switch
Check air switch terminals for supply voltage to terminals C and NO.
If voltage is present on one side only, check for air tube blockage or
misalignment. If these check okay, adjust air pressure switch, or replace air
pressure switch as needed.
Oven cavity hi-limit thermostat Terminals are normally closed, open at 350°C (660°F). If open, reset and
test oven for proper operation. If thermostat will not hold for maximum
oven temperature, and oven is not exceeding control setting, check for
proper location of capillary bulb in its spring holder. If above checks are
okay, replace hi-limit thermostat.
Ignition control
Check for proper supply voltage to ignition control. Check for proper
voltage to the burner blower motor. This can be checked at motor
connecting plug terminal 5 and Neutral. If voltage is present, proceed with
next test. If not, wait 30 seconds, push reset button and try to restart. If
this fails, check wires from burner blower motor to the ignition control. If
the above checks okay, replace ignition control.
Burner blower motor
Check for supply voltage to motor. WITH POWER OFF: Turn blower wheel
to check for locked rotor. If supply voltage is present at motor connecting
plug terminal 5 and Neutral, and motor does not run, replace burner
blower motor.
Air pressure switch (burner
motor)
Check for proper supply voltage switching from “NC” to “NO” on the
air pressure switch. Check for air pressure switch adjustment, air tube
blockage or misalignment. If these adjustments fail, replace air pressure
switch.
Ignition control
A pre-purge time of 30 to 60 seconds occurs after burner blower motor
starts. Check for high voltage spark output from the ignition control. If
there is no high voltage spark output, check reset button for ignition
control. If there is still no high voltage output, replace the ignition control.
Igniter/sensor assembly
Check this assembly for visible damage. Replace as needed. If there is
no visible damage, check for voltage supply to igniter/sensor assembly.
If there is voltage supplied to the igniter/sensor, but there is no spark,
replace the igniter/sensor assembly.
Gas valve
Gas valve should open as the ignition control generates the high voltage
spark. Place a manometer on the pressure tap fitting (located in the gas
piping just prior to the burner manifold) and check for gas pressure.
If valve does not open, check reset button on ignition control and all
connections for tightness. If there is still no gas pressure, remove the
ignition control from the gas valve. Check the coils of the gas valve for
opens or shorts. Readings should be as follows: V1 – 2.9K ohms approx., V2
– 1.3K ohms approx. If these readings are not achieved, replace gas valve.
If these readings are achieved, replace ignition control.
