Passive Alarms

If the amber Acknowledge Alarm LED is blinking, the alarm is a passive alarm. The dryer continues to operate, but this problem could prevent correct drying of your material. Note that once the Acknowledge Alarm button is pressed once, the blinking amber LED becomes solid.

Central

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

Problem

P1 Process Temperature Deviation – The process tem- perature exceeds the deviation band as entered for the speci- fied time. Default values are 43°F (6°C) for 5 sec.

P2 Process Low Temperature – The process temperature is less than the low temperature setpoint for the specified time. Default values are 70°F (21.1°C) for 20 sec.

P3 Regen Temperature Deviation – The regeneration temperature exceeds the devi- ation band for the specified time. Default values are 43°F (6°C) for 5 sec.

Possible cause

One of the solid state relays (SSRs) failed in the closed position.

The process RTD is loose or has fallen out.

The air hose connections are loose.

Precooler water is too cold, or the water flow rate is too high.

The process RTD is loose or has fallen out.

Process heater has failed.

One of the solid state relays (SSRs) failed in the closed position.

The regeneration RTD is loose or has fallen out.

The air hose connections are loose.

Solution

Replace the failed solid state relays (SSR).

Check the process RTD and tighten if needed.

Tighten all air hose connections.

Check water temperature and flow settings. Adjust as necessary.

Check the process RTD and tighten if needed.

Check the heater fuses and resistance across each leg of the process heater.

Replace the failed solid state relays (SSRs).

Check the regeneration RTD and tighten if needed.

Tighten all air hose connections.

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Conair 25, 15, 50, 100 specifications Passive Alarms

50, 15, 100, 25 specifications

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