3.6 Fault Code
Fault Code Fault Event Fault Code Fault Event
01 Bus start failure 45 Charger fault
02 Bus over 46 Incorrect UPS setting
03 Bus under 47 MCU communication failure
04 Bus unbalance 49 Phase error on input and output
06 Converter over current 61 Bypass SCR short circuited
11 Inverter soft start failure 62 Bypass SCR open circuited
12 High inverter voltage 63 Voltage waveform abnormal in L1 phase
13 Low inverter voltage 64 Voltage waveform abnormal in L2 phase
14 Inverter L1 output(line to neutral) short circuited 65 Voltage waveform abnormal in L3 phase
15 Inverter L2 output(line to neutral) short circuited 67 Bypass O/P short circuited
16 Inverter L3 output(line to neutral) short circuited 68 Bypass O/P line to line short circuited
17 Inverter L1-L2 output (line to line) short circuited 69 Inverter SCR short circuited
18 Inverter L2-L3 output (line to line) short circuited 6C BUS voltage drops too fast
19 Inverter L3-L1 output (line to line) short circuited 6D Current sampling error value
1A Inverter L1 negative power fault 6E SPS power error
1B Inverter L2 negative power fault 6F Battery polarity reverse
1C Inverter L3 negative power fault 71 PFC IGBT over-current in L1 phase
21 Battery SCR short circuited 72 PFC IGBT over-current in L2 phase
23 Inverter relay open circuited 73 PFC IGBT over-current in L3 phase
25 Line wiring fault 74 INV IGBT over-current in L1 phase
31 Parallel communication failure 75 INV IGBT over-current in L2 phase
41 Over temperature 76 INV IGBT over-current in L3 phase
42 DSP communication failure 77 ISO Over temperature fault
43 Overload 78 LCD & MCU communication failure
3.7 Warning Code
Warning Code Warning Event Warning Code Warning Event
01 Battery unconnected 22 Bypass situations are different in parallel system
02 IP Neutral loss 24 Unbalanced load in parallel system
04 IP phase abnormal 33 Locked in bypass after overload 3 times in 30 minutes
05 Bypass phase abnormal 34 Unbalanced converter current
3 Operations Proprietary and Confidential ©2024 Vertiv Group Corp. 75
Vertiv™ Liebert® MTP Online UPS User Manual 20-40-80kVA
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