Lincoln 1164-000-EA is no read-outon the oven display, replace oven, Thermocouple, Cooling fan

Models: 1155-000-EA 1164-000-EA 1154-000-EA

1 32
Download 32 pages 63.63 Kb
Page 13
Image 13

 

 

 

terminals. Replace as needed.

 

 

 

Cooling fan

Line voltage should now be at the cooling fan. If voltage

 

 

 

 

is present, check motor for opens, shorts or grounds.

 

 

 

 

With power off, check for locked rotor.

 

 

No automatic control

Incoming power supply

Check breaker, reset if required. Check power plug to

 

 

box cooling

 

be sure it is firmly in receptacle. Measure incoming

 

 

 

 

power, call power co. if needed.

 

 

 

Oven cavity hi-limit

Terminals are normally closed, opens at 660°F (350°C).

 

 

 

thermostat

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 ion its spring holder. If

 

 

 

 

above checks are okay, replace hi-limit thermostat.

 

 

 

Fuse, 10 amp

Check, replace if necessary.

 

 

 

Fuse holder

Check, replace if necessary.

 

 

 

Hi-limit thermostat, control

Check for voltage on both sides of switch. Terminals are

 

 

 

box

normally closed. If open, reset and test oven for proper

 

 

 

 

operation. If thermostat will not hold, and control box

 

 

 

 

temperature is not exceeding 140°F (60°C), replace

 

 

 

 

thermostat.

 

 

 

Cooling fan thermostat

Check the cooling fan thermostat (thermostat closes at

 

 

 

 

120°F and opens at 100°F). With the cooling fan

 

 

 

 

thermostat pre-heated, check for continuity. If

 

 

 

 

thermostat is open, replace cooling fan thermostat.

 

 

 

Cooling fan

Line voltage should now be at the cooling fan. If voltage

 

 

 

 

is present, check motor for opens, shorts or grounds.

 

 

 

 

With power off, check for locked rotor.

 

 

Oven will not heat

Main fan

If not operating, refer to “Oven fan will not run”.

 

 

 

Control transformer

Check for supply voltage to the primary of control

 

 

 

 

transformer. If no voltage is present, trace wiring back

 

 

 

 

to oven fan switch. If voltage is present, check for

 

 

 

 

24VAC at transformer secondary. If there is primary

 

 

 

 

voltage, but no secondary voltage, replace control

 

 

 

 

transformer.

 

 

 

Air pressure switch

Check air switch terminals for supply voltage to

 

 

 

 

terminals “NO” and “COM”. If voltage is present on one

 

 

 

 

side only, check for air tube blockage or misalignment.

 

 

 

 

If these are okay, adjust air pressure switch or replace if

 

 

 

 

necessary.

 

 

 

Oven control

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

 

 

 

 

present, trace wiring back to control transformer. Check

 

 

 

 

for supply voltage to oven control. If no voltage is

 

 

 

 

present, trace wiring back to oven fan switch. If voltage

 

 

 

 

is present, check for a read-out on the display. If there

 

 

 

 

is no read-out on the oven display, replace oven

 

 

 

 

display. If there is a read-out on the oven control, set

 

 

 

 

the control to maximum temperature (see Installation

 

 

 

 

operation manual for temperature adjustment). With the

 

 

 

 

control at maximum temperature, check for supply

 

 

 

 

voltage to the mercury contactor. If there is voltage at

 

 

 

 

the mercury contactor, proceed to “Mercury contactor”

 

 

 

 

for next check. If there is no voltage at the mercury

 

 

 

 

contactor, trace wiring back to the oven control. If there

 

 

 

 

is no voltage output at the oven control, check the read-

 

 

 

 

out on the oven control. If the oven control reads

 

 

 

 

“PROBE FAIL” this indicates that the thermocouple has

 

 

 

 

failed or become disconnected from the oven control.

 

 

 

Thermocouple

Check to see that the thermocouple is securely

 

 

 

 

connected to the oven control. If the thermocouple is

 

Impinger II – Advantage Digital Service Manual - International

13

Page 13
Image 13
Lincoln 1164-000-EA is no read-outon the oven display, replace oven, control at maximum temperature, check for supply