Lincoln 1628-000-A Manuel D’Utilisation

Low Profile – 1600 Series Adv Dig Electric S.M. – Int’l

Cooling fan thermostat(s)

Check the cooling fan thermostat. (Thermostat closes
at 49

C and opens at 38

C). With the cooling fan

thermostat preheated, check for continuity. If switch is

open, replace.

Fuse, 3 A., cooling fan

Check, replace if necessary.

Fuse holder

Check, replace if necessary.

Cooling fan(s)

Supply voltage should now be at these motors. If

voltage is present, check motor for opens, shorts or

grounds. WITH POWER OFF: Check for locked rotor.

Fan switch

Check to see that the fan switch is on.

Oven will not heat

Main oven fan

Check if main oven fan is operating. If not, refer to

“Oven fan will not run”.

NOTE: These ovens utilize 2 complete /Temperature control systems. Each system will Follow the same

troubleshooting sequence.

Oven control 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 insure

contacts are closing. Replace relay as needed.

Thermostat, oven cavity hi-limit

Terminals are normally closed. If open, reset and test

oven for proper operation. If thermostat will not hold

for maximum oven temperature, and oven is not

exceeding maximum temperature dial setting, check

for proper location of capillary bulb in its spring holder

If above checks OK, replace hi-limit.

Contactor, hi-limit

Check for line voltage to the contactor coil. If no

voltage is present, trace wiring back to the oven cavity

hi-limit thermostat(s). If voltage is present, check to

insure contacts are closing. Replace contactor as

needed.

Fuse, heater, 50A.

Check, replace if necessary.

Fuseholder

Check, replace if necessary.

Control transformer

Check for supply voltage to the primary of the control

transformer. If no voltage is present, trace wiring back

to the oven control 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.

Oven control

Check for 24VAC supply to control. If no voltage is

present, trace wiring back to control transformer. If

24VAC is present, check for a read-out on the control

display. If there is 24VAC 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 installation operations

manual for temperature adjustment). With the control

set at maximum temperature, check for line voltage at

the heat relay (mercury contactor). If there is voltage

at the heat relay, proceed to “Heat relay” for next

check. If there is no voltage at the heat relay, 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.