Despatch LEB Series User Manual
Page 41
33
Difficulty
Probable Cause
Suggested Remedy
Exhaust air vent
Adjust exhaust air vent. Unit
will not control at minimum
operating temperature with
vent(s) closed.
CONTROL instrument
malfunction
Verify control parameters.
Replace relay if no output
exists. Replace CONTROL
instrument if 5 VDC output
exists.
Heater does not shutdown
until temperature reaches
the HI-LIMIT setting
SSR Relay malfunction
Replace relay if no
CONTROL output exists.
Door closes into top or
bottom latch only.
Uneven latch tension
adjustment
Ensure that latch strike is
contacting center of latch.
Adjust mounting angle as
required. Adjust door for
even top and bottom latch
tension by turning screws on
ends of latch. Clockwise
increases tension on latch.
Counterclockwise decreases
tension.
Door will not stay closed.
Inadequate latch tension
Ensure that latch strike is
contacting center of latch.
Adjust mounting angle to
center as required. Increase
latch tension by turning
screws on end of latch
clockwise. Adjust in even
increments on all four
screws to keep door pull
even.