Omega Engineering hot point CL900A Series, User Manual

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7-1
Troubleshooting Guide
7
Section 7 - Troubleshooting Guide
Problem Solution
1. Unit will not turn on. a. Check all electrical connections.
b. Check rear panel fuses.
c. Unit requires service, contact our
customer service department.
2. Unit turns on but the probe a. Check that you have entered a setpoint
well will not get hot. above the ambient temperature.
b. Verify that the controller is set to its
factory default settings.
c. Unit requires service, contact our
customer service department.
d. Unit has been operated above ambient
temperature operating range. Safety
cutoff switch has disabled heater. Unit
should be sent back to factory for reset
and safety check.
3. Controller display shows “Err.H” a. Unit requires service, contact our
and the probe well will not get hot. customer service department.
4. Probe well temperature will not a. Verify that the controller parameters
stabilize to within ±0.5° of the are set to factory default settings.
setpoint temperature.
b. Unit requires service, contact our
customer service department.
d. Line voltage is not stable.