Precision-control-systems 5420 Manual de usuario descargar pdf (Pagina 13)

Model 5420 ControlIR

User Manual Maintenance

Maintenance

Troubleshooting

Maintenance and

Trouble Shooting

No routine maintenance is required. The 5420 should be kept clean and

dry. If cleaning is required, unplug unit before cleaning.

Troubleshooting should be done by Qualified Personnel especially if the

5420 needs to be opened up.

SYMPTON ACTION

Heater will not turn on.

- unit is plu

ed into an ener

ized receptacle

- on/off switch is in the ‘On’ position.

- On 5420 and 5420E versions with

potentiometer control, verify control is not

set to 0.

- On 5420E make sure the timer is not set to

0 when pressing the green button,

additionall

the red LED should be flashin

as the timer counts down.

- Heater properly connected to the 5420.

- Lamp burned out in the heater.

- 480 volt 5420E and 5420mA check fuses.

Heater will not turn off.

- Shorted SCR unit always runs at 100%

power. Can be checked: with unit

unplugged, open unit disconnect heater

wires and put an ohm meter across L1 and

L2 if it reads 0 or a small value, the SCR is

defective.

- On the 5420E check for the correct time

range, and LED flashing.

Research, Inc.

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Precision-control-systems 5420 Manual de usuario Pagina 13