CLS200 Series User’s Guide
Chapter 8: Troubleshooting and Reconfiguring
143
SYMPTOM POSSIBLE CAUSES RECOMMENDED ACTION
Control status of one
or more loops changes
from automatic to
manual
Failed sensor
Check the display or sotware for a failed
sensor message
Digital job select feature is
enabled and has changed
jobs
Set JOB SELECT DIG INPUTS to NONE.
This parameter is only accessible using the
controller’s keypad and display. See Job
Select Digital Inputs on page 68.
All loops are set to
manual 0%
Power is intermittent
Check wiring and service. See Wiring the
Power Supply on page 29.
Use a separate dc supply for the controller.
Provide backup power (UPS).
Set POWER UP OUTPUT STATUS to
MEMORY. See Power Up Output Status on
page 71.
Analog reference voltage is
overloaded
Disconnect wiring from the +5V Ref
connection on TB1.
Hardware failure
Check the controller front panel for a
hardware alarm. See System Alarms on page
142.
Controller does not
behave as expected
Corrupt or incorrect values in
RAM
Perform a NO-key reset. See NO-Key Reset
on page 150.
Corrective and Diagnostic Procedures
The following sections detail procedures you may use to diagnose and correct problems with the
controller.
Low Power
If the controller displays LOW POWER or the display is not lit:
1. Acknowledge the alarm.
2. If the error message remains, turn the power to the controller off, then on again.
3. If the error message returns, check that the power supplied to the controller is at least
12.0VDC @ 1A. See Wiring the Power Supply on page 29.
4. If the error message returns again, make a record of the settings. Then, perform a NO-key
reset. See NO-Key Reset on page 150.
5. If the error is not cleared, contact your supplier for further troubleshooting guidance. See
Return Material Authorization (RMA) on page 3.
Battery Dead
The dead battery alarm indicates that the CLS200 battery is not functioning correctly or has low
power or no power. If this alarm occurs, parameters have reset to the factory default settings.
NOTE! The controller will retain its settings when powered. The battery is required to
keep the settings in memory only when the controller is powered down.
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