Chromalox CN2110 manual Troubleshooting, Symptom Probable Cause Correction Steps

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.

Symptom	Probable Cause		Correction Steps
Power applied, display	1.	No power applied	1.	Check power wiring
does not light, and	2.	External fuse open		and fusing
controller does not
			2.	Power down and
function
				repower up
Display alternates	1.	Open sensor	1.	Check sensor wiring
between HI and	2.	Out of calibration	2.	Check selection
SENS, CN 2110
				switches
disables control
			3. To verify that controller
output
				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
Process does not	1.	No power being	1.	Verify Load LED is ON
heat up		applied to the load	2. Verify the heater or fuse
	2.	Load fuse open		is not open
			3. Verify output limit is set
				to 100%
			4. Verify set point is
				greater than process
				temperature
			5.	Verify output wiring
Erratic operation	1.	Intermittent sensor	1.	Check sensor wiring or
		connections		substitute sensor
	2.	Controller failure		simulator
		(internal electronics)	2.	Power down and
	3.	External electrical		repower up
		noise	3.	Contact Omega

CN 2110 22 Section 9–Troubleshooting