Safety Interlock Tests

The fault indicators, RF detector, and external interlocks should be tested at regular intervals to assure safe operation of the UV system.

1.With the power supply chassis inserted into the cover and single-phase power applied, depress the IND TEST button on each power supply. All LED indicators should light.

2.Turn all POWER control switches to ON. (No UV light is being produced by the bulb.) Press the STANDBY switches of all units.

3.Operate the external interlock switch(es), by opening light shields, etc. The system should shut down and produce an LED signal. Reset unit by pressing the LAMP OFF/RESET switch on the master units.

4.To actuate self-test of the RF detector, depress the test button on the detector and hold it down for 4 seconds. The system should shut down and produce an RF Interlock LED signal. Reset as before.

Fault Indicators

When an interlock switch is opened or improper equipment operation is detected, a fault signal is generated. Power is removed from the irradiator and blower of one or all units, depending on the type of fault and the programming selected by the user. The type of fault (Unit or System) is indicated on the front panel of the unit detecting the fault.

Unit Faults

Unit faults are those detected within an individual module. The Lamp Control switch and the top five light-emitting diodes on the front panel indicate the unit faults (see Figure 14 on page 50).

 

Table 15. Unit Faults

 

 

Indicator

Description

 

 

(HV Cable)

If the LAMP OFF/RESET switch is lit when the POWER switch is

 

ON, but the unit will not go to STANDBY when the switch is

 

pressed, the high voltage cable is not connected or faulty.

 

 

LAMP OUT

After ON switch pressed: the photocell was not satisfied within 8

 

seconds of initial startup time, or the light output fell low enough

 

to unsatisfy the photocell at any time after startup. After

 

STANDBY switch: Shorted Photocell detected.

 

 

66F300S/F300SQ Ultraviolet Lamp System