Despatch LCC1-87NV-2 - Manual (Page 41)

32
Difficulty
Probable Cause
Suggested Remedy
temperature around
door Door seal deterioration Replace door seal.
Improper airflow
Fan motor failure
Replace fan motor.
Unbalanced fan heel
Replace fan heel.
Filter clogged
Replace filter.
Excessive vibration
Dirty fan wheel
Clean fan.
Unbalanced fan wheel
Replace fan.
Oven will not control
at setpoint
HIGH LIMIT instrument
set too low
Set the HIGH LIMIT instrument higher.
HIGH LIMIT is out of
calibration
Recalibrate the HIGH LIMIT
Solid state relay
malfunction
Replace solid state relay.
Control instrument
malfunction
See troubleshooting information in CONTROL
instrument manual.
Air friction of recirculation
fan
The minimum operating temperature is around
65 C above ambient room temperature. Use
optional water cooling coil.
Heater does not shut
off until the
temperature reaches
the high limit setting
Solid state relay shorted
Replace solid state relay.
Excessive O
2
levels
Door seal deterioration
Replace door seal.
Pressure relief valve
leaking
Replace valve
Fan shaft seal leaking
Replace shaft seal (remove fan motor first)