Lincoln Impinger II - Advantage Series - Manual (Page 16)

Impinger II – Advantage Service Manual - Domestic 16
Hall Effect Sensor Check for any physical damage to hall effect sensor
(mounted on conveyor drive motor.) Check all
wiring and connections for damage. check all
connections for damage. Check all connections for
tightness or proper location and check all wiring for
visible damage. Replace as needed . Connect
new hall effect to system and check for steady
operation.
Temp. Display inoperative
Display Transformer Measure the transformer primary for input, if
voltage is not present, trace wiring back to the oven
power source. Measure the secondary output,
which will normally by 12-15 VAC. Voltage across
terminals 1 and 3 on the time/temp. display should
read 12-15 VAC. Terminals 1-2 and 2-3 should be
1/2 the voltage reading from 1-3. if the above
secondary readings are not achieved, replace
transformer
Temperature Display If proper voltage is present at terminals 1, 2, and 3
on temperature display, but the display is not
lighted, recheck all connections for tightness.
Temperature display is still not operating, replace
the temperature display.
Temp. Display inaccurate,
erratic or inoperative Thermocouple Place the thermocouple of a pyrometer into the
center of the top finger. Be sure the tip of the
thermocouple is not touching metal, it must sense
air temperature only. The pyrometer will indicate
oven temperature.
Measure DC millivolts of thermocouple at the
temperature display. See thermocouple chart on
page 19 for proper readings. Replace
thermocouple if proper readings are not achieved.
If readings are correct on the thermocouple, replace
temperature display.