Merrychef 402s - Manual (Page 34)

402s Ovens Pt. No. 32Z3522 Issue 6
34
Remove and Clean Air Filters.
If Dirty—Advise operating staff of the need
for this to be carried out on regular basis.
See User Manual
Still have a problem.
Error reported =
Magnetron or
Ambient
Ambient Magnetron
Check Location of oven is away from any
major heat sources.
Recommend re-location if necessary
Location fine and still have a problem.
Check cooling fan operation. Make sure there is Noticeable airflow from
air vents at the rear of the oven.
If Not investigate and replace cooling fan if necessary.
Fan is fine and I still have a problem.
The Ambient Air Sensor is located on the
Relay PCB. Measure the temperature in
the area with all the case work in place
using a Thermocouple Meter
Less than 110°F
More than
110°F
Cooling Air Flow
Problem into control
area.
Ambient Conditions
too hot
Check 15 ribbon Cable
Replace Relay PCB.
Note :- Each Magnetron
has a thermistor attached
to it. The control unit will
produce an error if the
temperature exceeds
235°F.
Establish if the magnetron
is actually getting hot.
Remember to take care
given the High Voltage in
the magnetron area.
Check sensor
connections.
Replace Magnetron.
Magnetron / Overheat issues
Temperature
reading