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

Shut Down Alarms

Problem Possible cause

Solution

A4 Regen Heater High Temperature – The snap switch in the regeneration heater tube activated due to excessive tem- perature.

A5 Carousel Index Too Long Alarm – If the carousel index was more than 1.5 times the normal index time, it shuts down the dryer.

A6 Carousel Index Failure – If the carousel index is requested but no contact transi- tion from on to off is seen within 5 sec, it shuts down dryer.

The regeneration exhaust is blocked or the air hoses are loose.

The isolation contactor failed in the closed position.

The heater solid state relays (SSRs) failed.

The limit switch is not adjusted correctly.

The limit switch is not adjusted correctly.

The bed drive motor is damaged.

The set screw on the bed drive motor shaft plate is loose.

The bed drive motor relay has failed.

Check that the bed plates are in the proper position (lined up with the hoses). See “Adjusting the limit switch”.

Tighten any loose hoses.

Replace the isolation contactor.

Replace the failed heater solid state relays (SSRs).

Adjust the limit switch so that it drops into the groove and stops the bed plates. See “Adjusting the limit switch”.

Adjust the limit switch so that it drops into the groove and stops the bed plates.

Replace the bed drive motor.

Tighten the set screw. Make sure it is on the flat of the D shaped shaft.

Replace the bed drive motor relay.

A7 Return Air High Temperature – If the return air temperature at the inlet to the blower is greater than 180°F (82.2°C), it shuts down the dryer.

The hopper does not contain enough material.

You are drying at a high drying temp (above 250°F [121.1°C]) or you are run- ning at low throughputs.

If an optional aftercooler is installed, it does not have enough water.

The aftercooler coils are dirty.

Make sure your material supply system is working properly.

Add an optional aftercooler, if one is not currently installed.

Turn on the water supply, or fix any leaks or blockages.

Clean the aftercooler coils. See “Cleaning the Aftercooler”.

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