Powertronix Quasar Service Manual page 70

Chapter 6 - Maintenance
Scheduled Maintenance
Mechanical inspection
1.
2.
Note: Refer to
3.
4.
5.
6.
Power checks
1.
2.
3.
4.
5.
Note: Turning P1 Inverter feedback potentiometer CCW will increase the
6 - 4
Carry out the weekly checks detailed above
Ensure that the UPS is totally powered down.
a) Check for input AC voltage at the rectifier input connections SKD 82/12 terminals 14, 15
& 16
b) Check for Battery voltage at the battery connection terminals 6 & 7 ve, 8 & 9 +ve.
c) Check for AC voltage at the output terminal connections 2, 3 & 4.
d) Check for an AC voltage at the Reserve Bypass input terminal connections 10, 11 & 12.
Figure 2 1 on page 2 4
Gain access to the UPS interior by removing the top cover panel.
Carry out a thorough examination of the UPS power components and sub assemblies,
paying particular attention to the following:
a) Electrolytic capacitors
b) Magnetic components
de lamination.
c) Cables and connections
d) Check that all printed circuit board connectors are secure.
e) Printed circuit boards
any signs of deterioration are found.
Thoroughly clean inside the equipment enclosure using a vacuum cleaner and low pressure
air to remove any foreign debris.
Reconnect the UPS input mains power.
Start the UPS following the appropriate operating procedure.
Carry out a calibration of the DC Bus Voltage and Inverter output voltage.
Connect a DVM set to DC volts to the DC bus and a second DVM set to AC volts to the UPS
output.
Select I1 (Input mains) to ON
a) The DC voltage will increase slowly up to 650 Vdc.
b) After 10 sec. the converter and the inverter will start regulating respectively
The DC Bus voltage to 750 Vdc ± 1%
The output inverter voltage to 400 Vac ± 1% (Assuming the UPS is set for an output of
400 Vac)
If the measured values are incorrect, re adjustment of the voltage settings can be carried out
using the potentiometers on the UPS control logic PCB Part Nº CS0072.
voltage.
Turning P2 Converter feedback potentiometer CCW will increase the
voltage.
Service Manual
for terminal connection detail.
check for signs of leakage, distortion etc.
check for signs of overheating, security of fixture and
check cables for signs of overheating.
check the cleanliness and integrity of the PCB's and replace if
3x3 UPS Maintenance
Issue 2 - November 2001