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Locks
Locks indicate a breakdown of the UPS or one of its parts. Locks are normally preceded by an alarm signal. In the
event of a fault and resultant breakdown of the inverter, the inverter will be switched off and the load will be powered
by the bypass line (this procedure is excluded for breakdowns caused by high and persistent overloads and by short
circuits).
CODE
DESCRIPTION
L01
Auxiliary power fault
L02
Boards link fault
L03
Input fuse/contact fault L1
L04
Input fuse/contact fault L2
L05
Input fuse/contact fault L3
L06
Boost overvoltage B+
L07
Boost overvoltage B-
L08
Boost undervoltage B+
L09
Boost undervoltage B-
L10
Bypass backfeed
L11
Bypass output fault L1
L12
Bypass output fault L2
L13
Bypass output fault L3
L14
Inverter overvoltage L1
L15
Inverter overvoltage L2
L16
Inverter overvoltage L3
L17
Inverter undervoltage L1
L18
Inverter undervoltage L2
L19
Inverter undervoltage L3
L20
Inverter sinewave abnormal L1
L21
Inverter sinewave abnormal L2
L22
Inverter sinewave abnormal L3
L23
Output overload L1
L24
Output overload L2
L25
Output overload L3
L26
Output short-circuit L1
L27
Output short-circuit L2
L28
Output short-circuit L3
L29
Output fuse/contact fault L1
L30
Output fuse/contact fault L2
L31
Output fuse/contact fault L3
// L32
Parallel synchronisation Error
// L33
Parallel synchronisation line fault
L34
Boost overtemperature
L35
Inverter overtemperature
L38
Boost temperature sensor fault
L39
Inverter temperature sensor fault
L42
Battery fuse fault
L43
Battery contact short cct L1
L44
Input contact short cct L1
// L45
Parallel bus division
// L46
Parallel communication fault
// L47
Parallel board fault
L49
Output capacitor overtemperature
L51
Battery Charger short-circuit
// L52
Parallel P power error L1
// L53
Parallel P power error L2
// L54
Parallel P power error L3
// L55
Parallel Q power error L1
// L56
Parallel Q power error L2
// L57
Parallel Q power error L3
Table 12 – UPS lock list (// = Parallel systems Anomaly)
