Shellab SSI3-2 - Manual (Page 11)

11
3/ Sensor miss-located, damaged or wires may be damaged - check
mounts for control and OTP sensors, then trace wires or tubing between
sensors and controls.
4/ Calibration sensitivity
– call Customer Service.
5/ OTP set too low – be sure that its setting is more than 5 degrees over
desired set point. Check if pilot light is on continuously; turn controller
knob completely clockwise to see if problem solved, then follow
instructions in section 5.6 for correct setting.
6/ Electrical noise
– remove nearby sources of RFI including motors,
arcing relays or radio transmitters.
7/ Bad connection on temperature sensor or faulty sensor
– check
connectors for continuity and mechanical soundness while watching
display for erratic behavior; check sensor and wiring for mechanical
damage.
8/ Bad connections
– check connectors for mechanical soundness and
look for corrosion around terminals or signs of arcing or other visible
deterioration.
Will not maintain set point
1/ Assure that set point is at least 1 degrees over ambient.
2/ See if ambient is fluctuating
– check for adjacent open doors or
HVAC duct openings, stabilize ambient conditions.
Display and reference thermometer don’t
match
1/ Calibration error – see section 5.6.
2/ Verify that reference thermometer is certified.
Can't adjust set points or calibration
1/ Turn entire unit off and on to reset.
2/ If repeatedly happens, call Customer Service.
Calibrated at one temperature, but not at
another
This can be a normal condition when operating temperature varies
widely. For maximum accuracy, calibration should be done at or as
close to the set point temperature as possible.
MECHANICAL
Door not sealing
1/ Check physical condition of gasket.
2/ Adjust hinge blocks or twist the door.
3/ Confirm that unit has not been damaged and body is not out of
square.
Shaker motor noise
1/ Continuous Squeal - continuous squealing noise of a constant pitch
or tone. Changes only in intensity for various rpm settings. Stops when
the oscillate switch is turned off. Appears to be coming directly from
the motor, not the mechanism or gear box.
A/ Make sure the motor cable plugs are properly seated.
B/ Replace the speed control.
OTHER
Controller on at all times - "locked-up"
1/ Turn unit off and on to reset.
2/ If cannot change any condition on the front panel, call Customer
Service.
Front panel displays are all off
Fuse on circuit breaker.
Unit or wall fuse/circuit breaker is blown
1/ Check wall power source.
2/ Compare current draw and compare to specs on data plate.
3/ See what other loads are on the wall circuit.
Unit will not turn on
1/ Check wall power source.
2/ Check fuse/circuit breaker on unit or in wall.
3/ Check all wiring connections, especially around the on/off switch.
Unit is smoking – Out of box