Fusion F300S, F300SQ manual 72

Table 18. Troubleshooting/Fault Diagnosis (continued)

	Signal/
Operation	Other	Possible Cause	Corrective Action
	Symptoms
Switch from	PS TEMP	Power supply fan	Repair or replace fan.
OFF to	indicator lights	inoperative
STANDBY or
		Power supply too	Move to cooler location.
from STANDBY
		hot or in poor
to ON
		location
		Temperature switch	With power off, check the T101 and T102
		faulty or not	thermal switches, which should be closed,
		connected.	with an ohmmeter or DVM. Check that the
			thermal switch interconnections are
			secure.
		Card connectors not	Reseat connectors.
		secure
		Control card	Replace control card.
	SYS BLWR	Blower power;	If SYS BLWR input for external blower in
	indicator lights	pressure	J105A is in use, check external blower
			power and pressure in the same manner
			as remote blower.
		Jumper in J105A	If SYS BLWR input not in use, check
			jumper is in place in connector J105A.
		Control card	Replace control card.
Lamp Control at	PWR ERROR	K101	Check for presence of magnetron current.
STANDBY	indicator lights		If within specifications, then examine
			relays for stuck armature or contacts
			welded shut. Check operation of relay with
			single-phase power only connected.
		Control card	Replace control card.

CAUTION: Disconnect single-phase power at main circuit breaker immediately. Magnetron may be severely damaged by application of high voltage when lamp control is in OFF or STANDBY.

72F300S/F300SQ Ultraviolet Lamp System