LBB Series Oven Owner’s Manual MAINTENANCE
Version 20 55
7. Troubleshooting
Table 7. Common Technical Issues and Remedies.
Suggested Remedy/Next Step
Failure to heat or
only heats up to
30–50 °C
Check power source and/or oven and wall fuses.
Replace element (see Warranty statement,
Section 8).
Control Instrument
malfunction
Check control parameters. Replace controller if
OUT LED on controller does not turn on. See
section 7.1 and 7.2
Disconnect power and check connections behind
control panel.
Improperly loaded
workload
Reduce load or redistribute load in chamber.
Supply sufficient power and proper connections.
Check for circuit overload.
1 or 2 heating
elements burned out
Check heater amperage on the nameplate.
Replace burned out element (see Warranty
statement, Section 8).
Frequent heater
element burnout
Harmful fumes
generated by load
Increase vent opening or discontinue process.
Spillage or splattering
of material on heater
elements
Disconnect power and clean oven chamber and
elements.
Check the Control and High Limit instruments.
Control instrument
malfunction
Check control parameters before replacing the
Control instrument.
Control instrument
miscalibration
Check control parameters. Recalibrate Control
instrument.
Excess surface
or door
temperature
Door closed into top or
bottom latch only
See specific difficulty below for this problem.
Reposition fan wheel within 3/10” from top of
housing. Replace fan wheel.
Fan wheel has shifted
or fallen.
Inspect the wheel. Reposition fan wheel within
0.25” from top of housing.
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