Operating instructions

iii

Table of Contents,

continued

7. OPERATION

7.1 XM Power Module Start-up and Testing

7.1.1 AC Line Operation (LINE POWER)

7.1.2 Inverter Operation (STANDBY)

7.2 Identifying Modes of Operation

7.2.1 System Status Block

7.2.1.1 AC LINE Operation

7.2.1.2 STANDBY Operation

7.2.1.3 TRANSFER or SELF-TEST Mode

7.2.2 Charger Status Block

7.2.2.1 FLOAT Mode

7.2.2.2 EQUALIZE Mode

7.2.2.3 RECHARGE Mode

7.2.3 APM (Automatic Performance Monitor) Status Block

7.2.3.1 SELF-TEST Mode

7.2.3.2 BATTERY FAILURE

7.2.3.3 INVERTER FAILURE

7.3 Power Module Shutdown

8. MAINTENANCE 42

8.1 Check Battery Terminals and Connecting Wires

8.2 Check Battery Open Circuit Voltage

8.3 Check Battery Voltage Under Load

8.4 Check Battery Charger (FLOAT) Voltage

8.5 Check Battery Charger (EQUALIZE) Voltage

8.6 Check Output Voltage

8.7 Check Output Current

8.8 APM Manual Self-test

8.8.1 "TEST IN PROGRESS"

8.8.2 "CHECK BATTERIES"

8.8.3 "CHECK INVERTER"

8.9 Main Circuit Module and Logic Board Maintenance

8.10 Fuse Replacements

9. TROUBLE-SHOOTING AND REPAIR 46

9.1 Repair Instructions

9.2 Parts and Ordering Instructions

9.3 Common Parts for XP Series Uninterruptible Power Supplies

9.4 Trouble-shooting Guide

10. WARRANTY