Xtreme TX90 6kVA - Startup Procedure for Debug UPS

Xtreme Power Conversion Corporaon
TX90 6kVA & 10kVA Service Manual
Page 26
Uninterrupble Power Supply
DC BUS Voltage Regulaon
Startup Procedure for Debug UPS
• Connect an AC 220Vac/50(60)Hz onto L11 & L12.
• Remove the output loads connected to the UPS and remove the baery connecng wires of the UPS.
• Remove the Fuse of ulity input (TX90-6K : F2 of the MSDD0XX PCB, TX90-10K : F1 and F2 of the MSEF4XX).
• Remove the control wires CN13 & CN14 of the MSDC0XX PCB and measure the DC Bus voltage by using
mul-meter. (MSDD0XX PCB: Bus + is to measure CN19 to the upper end of C38 and Bus – is to measure
CN19 to the upper end of C37, MSEB0XX PCB : Bus + is to measure CN1 to CN2 and Bus – is to measure
CN2 to CN23.)
• Turn o CB2 and turn on CB1 for 6K/10K, ulity breaker for 20K.
• Push key pad and key pad for approx. 3 seconds ll buzzer beeps twice, then the UPS will go to ser-
vice mode.
• Push key pad for a second ll the buzzer beeps twice, and LCD displays from Sr01 to Sr02. Measure the
waveform of the PFC and Inverter IGBT gate, it shall be a square wave with voltage/frequency at -6Vdc ~
+15Vdc / 20KHz, then buzzer will beep once.
• Push key pad for a second ll buzzer beeps twice. The LCD displays from Sr02 to Sr03, then the UPS pro-
ceeds the 1st stage so start, which means charger is charging the BUS + & -, then buzzer will beep once.
• Push key pad for a second ll buzzer beeps twice. The LCD displays from Sr03 to Sr04, then the UPS
proceeds the 2nd stage so start, which means baery SCR is turned on to charge the BUS + & -, then the
buzzer will beep once.
• Push key pad for a second ll buzzer beeps twice. The LCD displays from Sr04 to Sr05, then UPS pro-
ceeds the 3rd stage so start, which means the DC voltage is boosted up to the desired voltage, then the
buzzer will beep once.
• Push key pad for a second ll buzzer beeps twice. The LCD displays from Sr05 to Sr06, then the UPS
proceeds the voltage seng from Inverter So Start to Inverter Output, then the buzzer will beep once.
• Push key pad for a second ll buzzer beeps twice. The LCD displays form SR06 to OFF, then the UPS
proceeds DC Bus discharging. The UPS will shut itself o automacally aer discharged.
• Turn o CB1 and put the Fuse of ulity input back.
• Turn on both CB1 and CB2
• The LCD displays “oFF”, then measure the output of the UPS is nominal voltage such as 220Vac/50(60Hz)
or not.
• Adjust the voltage of Bypass Input at 170Vac/50(60)Hz and check if the UPS output voltage is near 0Vac?
• Adjust the voltage of Bypass Input at nominal voltage such as 220Vac/50(60)Hz.
• Push key pad for 3 seconds unl buzzer beeps twice, then the UPS proceeds AC start procedure. When
self-test is executed completely, the UPS will switch from bypass output to Inverter output. Measure the