Lincoln Foodservice 1633-000-EA, Parts & Service Manual

Low Profile –1600 Series Advantage Digital Service Manual – Int’l 

8 

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. 

Flame will not  
stay on 

Flame sensor 

To check for flame sensor operation, connect a digital 
multimeter (capable of measuring D.C. microamps) 
between the flame sensor wire and the flame sensor 
connection on the ignition control. Sensor current is to 
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 D.C. 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 24VAC at the transformer secondary. If 
there is primary voltage, but no secondary voltage, 
replace control transformer.