Dri-Air Industries ARID-X Manuel d'utilisation - Page 13

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DRYER OPERATION

TROUBLE SHOOTING

OPERATING MANUAL - ARID-X, HP4-X 150-300 FM DRYERS

Revision 10/8/02

DRI-AIR

INDUSTRIES, INC.

The new Dri-Air Standard PLC and MICROPROCESSOR

Electrics were designed for quick diagnosis of problems.

The following steps should be done before proceeding with

other diagnostic steps.

1. Check the Power Circuit:

a. Incoming fuses or circuit breaker

b. All dryer fuses:

Each fuse, with the exception of the main fuses, has

a blown fuse indicator light that illuminates when the

fuse is blown.

c. Is power supplied to the unit?

d. Check heater continuity using a volt ohmmeter.

2. Compressed Air:

a. Is compressed air connected with at least 60 PSI

b. Check water separator and drain if necessary

c. Pressure gage should read 60 PSI

3. Air Flow Circuit:

a. Ensure Zone Valve position corresponds to the

regeneration cycle by noting the valve's zone position as

detailed in the section discussing troubleshooting the

Pneumatic Zone valve on page 15 of this manual.

b. Make sure that all hoses are connected, not crushed,

and free from obstructions.

c. Inspect filter and make sure cover is tight and the filter is

clean.

4. Control Circuit:

a. Using the PLC/MICRO Display Panel ZONE indicator

lights as a guide for the dryer regeneration cycle, check

that all inputs/outputs are proper for the part of the

regeneration cycle that the machine is in.

5. Operating Conditions:

a. Check the process temperature. It should not be set

below 140° F (60° C) because the unit will go into high

temp alarm.

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