CLS200 Series User’s Guide
Chapter 8: Troubleshooting and Reconfiguring
142
System Alarms
If the controller detects a hardware problem, it displays a message. The message persists until the
condition is corrected.
Table 8.4 — Hardware Error Messages
MESSAGE POSSIBLE CAUSE RECOMMENDED ACTION
LOW POWER
Power supply failed See Low Power on page 143.
BATTERY DEAD
RAM battery is dead See Battery Dead on page 143.
AW
Ambient warning. Ambient
temperature exceeds operating limits
by less than 5°C (9°F).
See Ambient Warning on page
144
H/W AMBIENT FAILURE
Ambient temperature exceeds
operating limits by 5°C (9°F).
Reference voltage (5VDC) shorted to
common.
Hardware failed due to excessive
voltage on inputs.
See H/W Ambient Failure on
page 144.
H/W GAIN FAILURE
Hardware failed due to excessive
voltage on inputs.
See H/W Gain or Offset Failure
on page 145.
H/W OFFSET FAILURE
Hardware failed due to excessive
voltage on inputs.
See H/W Gain or Offset Failure
on page 145.
Other Behaviors
The following table indicates potential problems with the system or controller and recommends
corrective actions.
Table 8.5 — Other Symptoms
SYMPTOM POSSIBLE CAUSES RECOMMENDED ACTION
Indicated temperature
not as expected
Controller not communicating
See Checking Analog Inputs on page 145.Sensor wiring incorrect
Noise
CLS200 display is not lit
Power connection incorrect
Check wiring and service. See Wiring the
Power Supply on page 29.
No EPROM or bad EPROM
Replace the EPROM. See Replacing the
EPROM on page 150.
CLS200 damaged or failed
Return the CLS200 for repair. See Return
Material Authorization (RMA) on page 3.
CLS200 display is lit,
but keys do not work
Keypad is locked See Keys Do Not Respond on page 145.
CLS200 damaged or failed
Return the CLS200 for repair. See Return
Material Authorization (RMA) on page 3.
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