Typical Voltage Values - Powertronix Quasar Service Manual

Service Manual
7.6 -

Typical Voltage Values

The following table of values have been taken from a serviceable UPS and are intended to give a typical
reference when carrying out fault diagnosis.
Table 7-2 Typical Measured Voltage Values and LED indications
PCB Test Point/LED Indication
3Ph TL Control Logic SE0072
TP2 (+ve) to TP3 ( ve)
TP4 (+ve) to TP5 ( ve)
TP6 (+ve) to TP7 ( ve)
TP9
TP10
TP11
TP12
TP14
TP15
TP16
TP17
LED LD1 (green)
Auxiliary DC DC Converter SE0070
U2A pin 1
R36
R37
R39
Molex Connector PM2 Pin 1
Molex Connector PM2 Pin 2
Molex Connector PM2 Pin 3
Molex Connector PM2 Pin 4
Molex Connector PM2 Pin 5
Molex Connector PM2 Pin 6
Inverter Driver Feedback SE0071
R66
R69
R149
LED LD1
LED LD2
Battery Charger SE0074
Note: No voltage measurements can be carried out safely on this PCB.
LED LD1
3x3 UPS Troubleshooting
Issue 2 - November 2001
Normal Value
Inverter feedback signal to U8 Level adjusted by P1.
4.27V dc
Converter feedback signal to U9 Level adjusted by P2.
4.31V dc
4.28V dc Static Switch feedback signal to U8 Level adjusted by P3.
NO MAINS OK signal from U12A.
Logic Low
MAINS FREQ signal from U12B.
2.49 2.29V dc
5.48V dc TEMP ALARM signal from U14C (Active Low).
0.021V dc MAN BYP signal from U12D.
MAINS PRESENT signal from U12F.
0.37V dc
0.025V dc NO BATTERY HIGH signal from U13A.
5.01V dc BATTERY LOW signal from U13B.
NO BATTERY PREALARM signal from U13C.
0.016V dc
UPS Normal (OFF indicates an over temperature ST1, a DC offset
ON
condition or PCB power failure)
8.88V dc Battery voltage monitor.
5.59V dc VMAX level adjustment (P1) sets battery high level 500V.
VMIN level adjustment (P2) sets battery low level 320V.
7.89V dc
PREALARM level adjustment (P3) 350V.
7.53V dc
16.83V dc +15V supply to Inv. driver feedback PCB.
+7.5V supply to Inv. driver feedback PCB.
7.68V dc
Ground.
0V
15.33V dc Battery high output to Inv. driver feedback PCB.
Battery low output to Inv. driver feedback PCB.
0.616V dc
Battery Prealarm output to Inv. driver feedback PCB.
15.47V dc
6.43V dc Reserve Bypass Vmin level adjustment (P2)
5.54V dc Reserve Bypass Vmax level adjustment (P1)
Temperature alarm reference adjustment (P3)
9.53V dc
OFF ON indicates incorrect phase rotation.
OFF ON indicates DC Offset unbalanced load.
FLASHING FLASHING indication when float charging battery.
Chapter 7 - Troubleshooting
Typical Voltage Values
Comment
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