Sterling 882.00295.00 User Manual

Large Dehumidifying Dryers 

Operation 

54 

Use the Alarm History screen to monitor system alarms. From the Main Menu screen, press 
the Alarms button to access the Alarm History screen. The three most recent alarms appear at 
the top of the Alarm History screen. Use the DOWN and UP buttons to scroll through the 
alarms.  

 

 

VALVE 
POSITION 

The Main Air Valve did not maintain 
position. 
Possible Motor or Limit Switch Failure. 

Immediate 
Shut Down  

VALVE 
MTR 
OVERRIDE 

The Main Air Valve did not find 
position. 
Possible Motor or Limit Switch Failure. 

Immediate 
Shut Down 

VALVE  
MOTOR FAIL 

The Main Air Valves expected and actual 
positions do not match. 
Possible Motor or Limit Switch Failure. 

Immediate 
Shut Down 

PROCESS  
SENSOR FAIL 

The process supply air temperature 
thermocouple is out of range. 
Possible thermocouple failure. 

Process 
Shut Down 

REGEN  
SENSOR FAIL 

The regeneration air temperature 
thermocouple is out of range. 
Possible thermocouple failure. 

Regeneration 
Shut Down 

PROCESS  
HIGH TEMP 

Process air temperature deviation is 
above high limit value. 
Possible solid state relay failure. 

Process 
Shut Down 

PROCESS  
LOW TEMP 

Process air temperature deviation is 
below low limit value. 
Possible heater failure. 

Alert Only 

PROCESS  
LOOP BREAK 

Process air temperature control loop is 
unable to maintain the process air 
temperature set point. 
Possible Missing thermocouple, Failed 
heater, Failed solid state relay. 

Process 
Shut Down 

REGEN  
HIGH TEMP 

Regeneration air temperature deviation is 
above high limit value. 

Regeneration 
Shut Down