Riello UPS Sentinel Dual (High Power) (3.3 - 10 kVA) - Manual (Page 63)

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ROBLEM SOLVING
 Commands in progress: Indicates presence of a remote command in progress.
CODE DESCRIPTION
C01 Remote shutdown command
C02 Remote load on bypass command
C03 Remote switch-on command
C04 Battery test in progress
LOCK
The LOCK (block) type report signals are usually preceded by an alarm signal and, on account of their
importance, result in the inverter being switched off and the load being powered through the bypass line (the
procedure is excluded in case of lockouts due to strong and persistent overloads and lockouts following a
short-circuit).
CODE DESCRIPTION
L03 Auxiliary power supply incorrect
L04 High temperature on heat sinks
L05 Temperature Sensor1 broken
L07 Temperature Sensor2 broken
L10 Input fuse broken or input relay stuck (does not close)
L13 Capacitor precharging failure
L20 Capacitor bank undervoltage
L21 Capacitor bank overvoltage
L40 Inverter overvoltage
L41 D-C voltage on output
L42 Inverter voltage not right
L43 Inverter undervoltage
L50 Overload: load > 103%
L51 Overload: load > 110%
L52 Overload: load > 150%
L53 Short-circuit
* In ECO mode, the load is normally powered by the bypass. Therefore, in the presence of a load of constant power,
the current absorbed depends on the mains voltage, which may accordingly be in excess of the value allowed by the
input plug and the protection upstream.
When this situation arises, the UPS reports a failure which automatically disappears if the input voltage increases
and/or the output load is reduced.