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CN 2110
Omega
Section 9—Troubleshooting
The following Troubleshooting Guide offers simple solutions to com-
mon problems and explains the CN 2110’s Error Messages. Review this
section for a possible solution to your problem before contacting
Omega.
Note: For each symptom, perform correction steps in the order listed.
Power applied, display
does not light, and
controller does not
function
Display alternates
between HI and
SENS, CN 2110
disables control
output
Process does not
heat up
Erratic operation
Symptom Probable Cause Correction Steps
1. No power applied
2. External fuse open
1. Open sensor
2. Out of calibration
1. No power being
applied to the load
2. Load fuse open
1. Intermittent sensor
connections
2. Controller failure
(internal electronics)
3. External electrical
noise
1. Check power wiring
and fusing
2. Power down and
repower up
1. Check sensor wiring
2. Check selection
switches
3. To verify that controller
is at fault, remove the
thermocouple and place
a jumper across the
sensor terminals of the
CN 2110. If the display
reads approximately
ambient, then the
sensor is open. Replace
the thermocouple.
4. See Section 7–Calibra-
tion
1. Verify Load LED is ON
2. Verify the heater or fuse
is not open
3. Verify output limit is set
to 100%
4. Verify set point is
greater than process
temperature
5. Verify output wiring
1. Check sensor wiring or
substitute sensor
simulator
2. Power down and
repower up
3. Contact Omega
22
Section 9–Troubleshooting