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Document #: LIN_GO_SM_IMPLOPRO_S1600_INTL_4605727 – 9/20
Troubleshooting
Section 5
PROBLEM
CAUSE
CORRECTION
Flame will not stay on –
Serial Number L31479 and
Above
Flame sensor
To check for flame sensor operation, connect a digital multimeter (capable
of measuring DC microamps) between the flame sensor wire and the
flame sensor connection on the ignition control. Sensor current should
be 0.9 microamps, minimum. If these readings are not achieved, replace
the igniter/sensor assembly. Also check for any type of damage to the
flame sensor wire and connections. NOTE: The DC microamp test must be
conducted with the oven in low flame (bypass) operation.
Power supply
Set the temperature to the lowest temperature setting. If there is sufficient
microamp current, but the flame will not stay lit, check for proper polarity
of the power supply.
Ignition control
If there is sufficient microamp current, and there is proper polarity of the
power supply, but the burner will not stay lit, check the reset button for
the ignition control. If the above test is okay, replace ignition control.
NOTE: Flame should be on at
this time
Low flame is on, but no
main flame
Control transformer
Check for supply voltage to the primary of the control transformer. If no
voltage is present, trace wiring back to the oven power relay. If primary
voltage is present, check for 24 VAC at the transformer secondary. If there
is primary voltage, but no secondary voltage, replace control transformer.
Oven control
Check for 24 VAC supply to control. If no voltage is present, trace wiring
back to control transformer. If 24 VAC is present, check for a read-out on
the control display. If there is 24 VAC supplied, but there is no read-out
on the control display, replace the oven control. If there is a read-out on
the control, set the control to maximum temperature (see
Section 6
for
temperature adjustment). With the control set at maximum temperature,
check for line voltage at the temperature regulation valve. If there is
voltage at the temperature regulation valve, proceed to “temperature
regulation valve” for next check. If there is no voltage at the temperature
regulation valve, trace wiring back to the oven control. If there is no
voltage output at the oven control, check the read-out on the control. If
the control reads “LP FAIL” or “RP FAIL”, this indicates that the thermocouple
has failed or has become disconnected from the control. “LP FAIL” indicates
a problem with the left thermocouple probe, and “RP FAIL” indicates a
problem with the right thermocouple probe.
Thermocouple probe
Check to be sure that the thermocouple is securely connected to the
oven control. If the thermocouple is connected to the oven control, and
the control indicates “LP FAIL” or “RP FAIL”, disconnect the thermocouple
from the oven control and measure the resistance of the thermocouple.
The left thermocouple should read approx. 21Ω. The right thermocouple
should read approx. 11Ω. If these readings are not achieved, replace the
thermocouple. If these readings are correct, proceed.
Oven control
If the thermocouple checks good, but the oven control display indicates
that there is a thermocouple failure, replace the oven control. If the
oven control indicates a temperature reading but the oven will not heat,
proceed.
Thermocouple
WITH POWER ON AND THERMOCOUPLE ATTACHED TO THE OVEN
CONTROL: Measure the DC millivolt output of the thermocouple. Refer
to the thermocouple chart (located in
Section 7
of the manual) for
proper millivolt readings. If these readings are not achieved, replace
thermocouple.
Oven control
If the thermocouple checks good, but there is no voltage output to the
temperature regulation valve, replace the oven control. If there is voltage
output to the temperature regulation valve, proceed.
Temperature regulation valve
Check for line voltage supplied to the temperature regulation valve. If
no voltage is present, trace wiring back to the oven control. If voltage
is present, listen for the valve to open and close. Also check for opens
or shorts in the operating coil. Replace temperature regulation valve as
needed.
