CN 2110 Temperature Controller

Troubleshooting

continued

 

Symptom

Probable Cause

Correction Steps

 

 

 

 

 

 

 

Process not

1.

Incorrect settings

1.

Check Proportional

 

in control

2.

Thermocouple

 

Band setting and

 

 

 

Automatic Reset

 

 

 

Wiring

 

 

 

 

 

setting

 

 

 

 

 

 

 

 

 

2.

Check thermocouple

 

 

 

 

 

polarity

 

 

 

 

 

 

 

Instrument continu-

1.

Severe electrical

1.

Separate sensor wiring

 

ally goes through

 

noise

 

from other wiring

 

power-up reset

 

 

2.

Apply power line filter

 

 

 

 

3.

Contact Omega

 

 

 

 

 

 

Display reads

1. Fan for T10 output

1.

Check for and clear any

 

FAn FAIL, CN

 

has failed

 

obstruction in fan, then

 

2110 disables

 

 

 

power unit up and

 

control output

 

 

 

check display

 

 

 

 

2.

Discontinue operation,

 

 

 

 

 

replace fan assembly,

 

 

 

 

 

or return to Omega for

 

 

 

 

 

replacement

Section 9–Troubleshooting

23

CN 2110

Page 27
Image 27
Chromalox CN2110 manual Troubleshooting, FAn FAIL, CN