Toshiba TOSNIC-7000S instruction manual 3 H 1 0 0 Changing the Power Supply to Maintenance Bypass

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8.3.7 Changing the Power Supply to Maintenance Bypass

This UPS must be completely shut down when performing maintenance and inspections. In such cases, the power supply to the load will go through the maintenance bypass. Table 8.8 shows the procedure used to change the power supply to this maintenance bypass. Table 8.9 shows how to change the power supply from the maintenance bypass back to the UPS.

Table 8.8 Changing From UPS to maintenance Bypass Power Supply

Step	Procedure	LCD/LED Status (After Execution)
1-3 Same as steps 1-5 in Section 8.3.4 "Stop."
4	Turn ON maintenance		BYPASS
	bypass AC circuit		BYPASS
	breaker 52M. ,*
			MOVE #52C AND #52L TO ‘ON’
		～	～	～	UPS
				～	UPS
		AC INPUT	CONVERTER	INVERTER
			FLOAT CHARGE		AC	～
			FLOAT CHARGE
		BATTERIES	EQUAL CHARGE		SWITCH
			DISCHARGE			AC OUTPUT
			DISCHARGE
		～			BYPASS
		BYPASS INPUT			BYPASS
		BYPASS INPUT

	52R	72B	52C	52M	52L
MCCB	OFF	OFF	ON	ON	ON

5	Perform steps 6	When the UPS is shutdown completely, nothing at all will be
	through 11 in Table 8.4 displayed on the LCD screen and all LEDs will be unlit.
	“Complete Shutdown”
	on page 34 to shut		52R	72B	52C	52M	52L
	down the UPS		52R	72B	52C	52M	52L
	completely.	MCCB	OFF	OFF	OFF	ON	OFF
	→Change to	MCCB	OFF	OFF	OFF	ON	OFF
	→Change to
	maintenance bypass
	power supply
	complete.

*During load operation, always operate the circuit breakers in the following order : 52M ON→52lL OFF→ 52C OFF

**When power is supplied to the UPS, circuit breaker 52M cannot be turned on.

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Contents ALL Rights Reserved July3 H 1 0 0 Sealed stand-alone lead storage battery Vent type stand-alone lead storage batteryProcedure and the status of the UPS unit Synchronized modeExact nature of what must be done is indicated Safety PrecautionsIntroduction Use 3 H 1 0 0 Safety PrecautionsCards Accordance with customer stipulations Do not open the rear doorDo not touch rotating section Locations of the Warning Labels Example 300 kVABe always Do not turn off Turn on Running Handling Precautions 3 H 1 0 0 Handling Precautions 3 H 1 0 0 Handling Precautions Contents Example 300 kVA AppearancePanel Controls Controls and Circuit ConfigurationExample 300 kVA C52R D72B E52R F52M G52L H8A I6CH This may result in failureCircuit Configuration UPS FaultPanel Keys 3 H 1 0 0 Panel Key-switchKey-switch Function Name Remarks Name Function Remarks Key Functions For HS or AHH individual battery systemsGraphic Display Panel Panels2 Graphic Display Panel Control This LED lights up when the AC input circuit breaker This LED lights up when the UPS is operatingThis LED is unlit when the converter has stopped Operating. It blinks when the converter is starting upScroll up Scroll down LCD DisplayNormal Display Screen LCD Screen Description 3 H 1 0 0 Normal Display Screen200V 50 %60.0Hz Normal Display ScreenBYP I/P-V 401VFailure Display Screen LCD Screen Description 3 H 1 0 0 Failure Display Screen52R Trip 98-09-093 H 1 0 0 LCD Screen Switching Operation Pre-operational check Types of OperationOperation General Description/Objective Startup Starts up and operates the stopped UPSStartup ProceduresBypass Press ‘RUN’ Switch When the message Appears, turn onMain circuit AC input Circuit breaker 52R Bypass Move #52R to ‘ON’ PositionWait several seconds For the startup process On page 14 for at least SecondTo finish Main circuit DC inputUPS power supply → The will start Power supply Changing processHold down the UPS Key g in the Figure On page14 for at3 H 1 0 0 Switch Power Supply UPS → Bypass 3 H 1 0 0 Stop 3 H 1 0 0 StopBatteries LED unlit → This complete UPS Shutdown Restart Press ‘RUN’ Switch Shutdown Move #52R to ‘OFF’Breaker72B Complete Shutdown 3 H 1 0 0 Complete ShutdownUsing the scroll keys Circuit switch 6CHTurn off the precharge Wait about 20 minutes Until the DC capacitorChanging From Floating Charge to Equalized Charge Check to make sure That the Equal Changing From Equalized Charge to Floating ChargeSecond → Change to floating Charge is complete Float Charge LED lit Equal Charge LED unlitChanging from Protective Charge to Floating Charge Changing From UPS to maintenance Bypass Power Supply 3 H 1 0 0 Changing the Power Supply to Maintenance BypassSame as steps 1-4 Changing From Maintenance Bypass to UPS Power Supply1 Startup 52R 72B 52C 52M 52LName Description TroubleshootingTypes of Errors Failure Data Screen LCD Failure Displays52R Trip 98-09-09 Failure Data Screen DescriptionsShows the nature of the warning. For details, see Section Up to 10 screens of warning data can be displayed↑ indicates there is a warning screen before this screen ↓ indicates there is a warning screen after this screenProtective Detector Locations 3 H 1 0 0 Failure MessagesLCD Message Description Indication Fault TripIncluding operation error Bypass input frequency errorBattery temperature has risen Battery fluid level has gone below prescribed levelPosition of Scroll Keys in Failure Data Screens For Individual battery systems. For HS or AHH batteriesScrolls to the next screen see Figure Scroll KeysScrolls to the previous screen see Figure Saving Waveforms ProcedureRestoring UPS Operation Only open the front panel when performing necessaryAlso check for other 11 Restoring UPS Operation ExampleFailure Data screens 98-09-09 By scrolling with scroll Panel