Fusion F300S, F300SQ Fault Diagnosis Tables, Table 16. System Faults, Table 15. Unit Faults (continued)

		Table 15. Unit Faults (continued)
	Indicator	Description
PWR ERROR		Improper operation of magnetron: either no magnetron anode
		current 2-4 seconds after high voltage is applied, or the
		presence of high voltage when the Lamp system is in OFF or
		STANDBY.
		CAUTION: If a PWR ERROR fault is indicated, press the LAMP
		OFF/RESET switch immediately. To prevent magnetron
		damage, single-phase power should be disconnected (see PWR
		ERROR fault).
PS TEMP		The power supply is overheating.
BLWR PRESSURE		Cooling air pressure within the irradiator is insufficient.

System Faults

The bottom three LEDs indicate system faults. These faults always shut down ALL units in the system, causing all LAMP CONTROL switches to flash.

System interlock switches and the RF detector may be connected to any unit, but are normally connected to the master. System faults will then be detected and displayed at the master power supply.

	Table 16. System Faults
Indicator	Description
SYS BLWR	Insufficient cooling air pressure in an external supply or exhaust
	blower causes pressure switch to open.
EXT INTLK	Open external interlock switch on a plenum cover, for example,
	connected at customer option.
RF INTLK	Excessive RF at the RF detector, or loss of power to detector.

Fault Diagnosis Tables

To determine the likely cause of failure in an F300S/F300SQ unit, note the operating sequence when the failure occurs. Also, record which fault indicator LED lights. The indicator may light immediately when the unit is switched from one condition to another (for example, from STANDBY to ON); or the signal may be displayed until after a programmed internal delay has elapsed.

There is a troubleshooting table for each fault indicator, showing secondary symptoms to help localize the problem. The possible causes are listed, followed by testing and repair instructions.

Installation, Operation, and Maintenance Manual # 509252 Rev R 67