Shut Down Alarms

Central

When supplied for central drying applications, these shut down alarms are not available.

Problem

Possible cause

A49 Process Protection

The Process RTD temperature probe is

High Temperature – If the

not installed correctly.

process protection temperature

 

exceeds the process protection

 

high temperature setpoint, it

The air lines are restricted or loose.

shuts down the dryer. Defaults

 

are set to 600°F (315.6°C) for

 

10 sec.

 

Solution

Make sure the RTD temperature probe tip is in the center of the hopper inlet tube.

Straighten any crimps in the hoses. Tighten any loose hoses.

A50 Process Protection Differential Temperature – If the process protection differen- tial temperature exceeds the process protection differential temperature setpoint, it shuts down the dryer. Defaults are set to 295°F (146.1°C) for 180 sec.

A51 Process Protection RTD Integrity – If the process RTD is faulty, it shuts down the dryer.

The process protection differential tem- perature setpoint is not at least 37°F (3°C) above the drying setpoint.

The Process RTD temperature probe is not installed correctly.

The air lines are restricted or loose.

The connection in the electrical enclo- sure for the process protection RTD is loose.

The connection of the RTD plug on the control board is loose.

Reset the process protection differential temperature setpoint at least 37°F (3°C) above the drying setpoint.

Make sure the RTD temperature probe tip is in the center of the hopper inlet tube.

Straighten any crimps in the hoses. Tighten any loose hoses.

Check the RTD plug connection and tighten if needed.

Check the plug connection and tighten if needed.

The process protection RTD has failed.

Replace the process protection RTD.

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Conair 50, 25, 15, 100 specifications Shut Down Alarms, Problem Possible cause

50, 15, 100, 25 specifications

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