Dri-Air Industries ARID-X Manual de instruções - Página 14

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DRYER OPERATION

DETAILED DIAGNOSIS

(PLC Controlled Dryer)

For Micro Controlled dryers please

see the Microprocessor Control

Instruction Manual

Page 14

DRI-AIR

Machine will not start: Power light is not on.

1. Check incoming fuses inside control box to see if they

are tripped or blown. Reset circuit breakers by turning

them off and then on.

2. Check small fuses (FU1 & FU2) next to contactor. The

LED will be lit if they are blown. Replace if necessary by

opening the fuse holder and put new fuse into holder.

3. Check that incoming power to the unit is proper.

4. Check safety snap discs.

Alarm light is flashing: Unit will not run.

Main contactor is not pulling in.

1. Check the motor overload OL1 located in the panel. If it

is tripped, the window will show as orange/yellow. Reset

overload by pushing in the reset button.

Machine will not run: High Temp Alarm Light flashing:

This indicates that the temperature has exceeded the high

limit programmed into the temperature control or the set

temperature can not be reached.

Press stop and restart machine holding in the start button.

Monitor the actual temperature to see if it exceeds the set

point or can not reach the set point. If it can not reach set

point, see section below.

Machine will not run. High Temperature Alarm on, not

flashing:

1. This indicates an "open" thermocouple or the

temperature in the desiccant tower exceeded 900° F.

Machine will not reach temperature:

1. If the process heater light is not lit.

A. Check output from temperature controller and input to

PLC.

B. Check the thermocouple. The tip should be in the

middle of the hose.

2. If the process heater light is lit.

A. Check fuses.

B. Check solid state relays.

C. Check that the air flow is correct.

D. Check blower rotation.

E. Check heater for continuity.

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

Revision 10/8/02

INDUSTRIES, INC.