7-3 Alarms

The Alarm Screen will pop up to show what alarm the dryer is having that moment. Look through the window on the door to see the screen.

7-4 Alarm Descriptions

Alarm

 

Alarm Description

 

Alarm Effect

Code

 

 

 

 

BV

 

The Main Air Valve did not maintain or find

 

Immediate

 

position.

 

 

 

Shut Down

 

 

Possible Motor or Limit Switch Failure.

 

 

 

 

 

CV

 

The Closed Loop Cooling Valve did not find

 

Immediate

 

position.

 

 

 

Shut Down

 

 

Possible Motor or Limit Switch Failure.

 

 

 

 

 

PS

 

The process supply air temperature switch

 

Process

 

opened.

 

 

 

Shut Down

 

 

Possible thermocouple failure.

 

 

 

 

 

RS

 

The regeneration air temperature switch opened.

 

Regeneration

 

Possible thermocouple failure.

 

Shut Down

 

 

 

PH

 

Process air temperature deviation is above high

 

Process

 

limit value.

 

 

 

Shut Down

 

 

Possible solid state relay failure.

 

 

 

 

 

PL

 

Process air temperature deviation is below low

 

 

 

limit value.

 

Alert Only

 

 

Possible heater failure.

 

 

RH

 

Regeneration air temperature deviation is above

 

Regeneration

 

high limit value.

 

Shut Down

 

 

 

 

 

The dew point value is above the high limit

 

 

DP

 

value.

 

Alert Only

 

Possible ambient air contamination or failed

 

 

 

 

 

 

 

regeneration cycle.

 

 

PB

 

Process blower is not running.

 

Process

 

Possible overload fault, contactor fault.

 

Shut Down

 

 

 

RB

 

Regeneration blower is not running.

 

Regeneration

 

Possible overload fault, contactor fault.

 

Shut Down

 

 

 

PF or RF

 

Process air filter (PF) or regen air filter (RF)

 

Alert Only

 

 

requires cleaning.

 

 

 

 

The process redundant air temperature

 

 

PR

 

thermocouple is out of range.

 

Immediate

 

Possible thermocouple or solid state relay

 

Shut Down.

 

 

 

 

 

failure.

 

 

Large Dehumidifying Dryers

Troubleshooting

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Sterling SDA 1000-5100 specifications Alarms, Alarm Descriptions, Alarm Alarm Description Alarm Effect Code