Owner`s manual

3.3 Replacement Parts
Replacement parts are available from MGE UPS Systems. Contact MGE UPS Systems Customer Support Services
for ordering replacement parts. Having replacement parts on hand will prevent unnecessary delays in critical
service times.
3.4 Troubleshooting and Servicing
Should you encounter a problem in the operation of the inverter and need MGE UPS Systems to service your
equipment, it is recommended to leave the unit in its current state. Record message (if any) and color signals on
the LCD display and LED indicators on the “Display” panel, then call MGE UPS Systems Customer Support
Services at 1-800-225-7822 for assistance. Leaving the unit in its current state will facilitate Tyco field engineers to
troubleshoot and bring your equipment back on line more easily. If you cannot wait, you may want to consider the
following troubleshooting tips.
3.4.1 Installation Check
Often, operation problems are caused by incorrect installation or setup. Before turning the system on, review
Chapter 2 for instructions pertaining to your particular system. Use the checklist in Table 4-1 in this review. If the
system fails to operate properly after being turned on, all items in Table 4-1 need to be rechecked and verified to
make sure things are connected correctly.
Table 3-1: Installation Checklist (Installed item to be verified)
◗ Inverter System included static transfer switch
◗ DC input terminals have correct voltage polarity
◗ Utility input terminals have correct voltage connections
◗ AC output terminals voltage connections
◗ Input conductor size correct ampacity
◗ Output conductor size correct ampacity
◗ Correct output voltage selected in personalizations
◗ Correct frequency selected
◗ On/Off Line Inverter is on-line
◗ Automatic or manual start is selected
3.4.2 Inverter System Basics
AC Input Circuit Breaker Ratings
Inverter rating 3.5 kVA 7 kVA 10.5 kVA 14 kVA 17.5 kVA 21 kVA
AC breaker rating 30A 60A 100A 125A 150A 200A
3.4.2.1 DC Input Circuit Breaker
Due to tremendous amounts of short circuit current available (in excess of 1000Amps for as long as several
minutes!) from bank(s) of batteries, that supply electrical power to inverter systems, it is extremely important to
connect a properly sized DC circuit breaker at the DC input cable that feeds the inverter system. The following table
is provided as a guide for selecting the proper circuit breaker. Refer to 2.3.1.2 for DC input specifications.
Owner’s Manual
Maintenance page 3 — 3