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Installation and User Manual
INTERNAL UPS FAULT
LOAD TRANSFER FAULT,
CALL MAINTENANCE
A fault has occurred in the static switch that transfers the load between the inverter and the bypass AC source (M2).
Servicing by the after-sales support department is required. The buzzer sounds continuously.
OVERLOAD
RATED CURRENT PER PHASE = XXXA
CHECK LOAD LEVEL
This display informs the user that load current is greater than rated current, and gives the value. The buzzer sounds
continuously.
UPS SHUTDOWN DUE T AN OVERLOAD
CHECK LOAD LEVEL
This message follows the preceding when the overload persists. The UPS has shut down and the buzzer sounds
continuously.
INVERTER NOT IN PHASE WITH MAINS 2
TRANSFER DISABLED,
CHECK MAINS 2
The phase difference between the inverter and the bypass AC source (M2) is outside tolerances. Transfer of the load
between the inverter and the bypass AC source (M2) will result in an interruption in the supply of power to the load.
For parallel UPSs, this message should be interpreted as meaning the phase difference between the inverter for
which the message is displayed and the other inverters is outside tolerances.
UPS SHUTDOWN
BY AN EXTERNAL COMMAND
The inverter has received a command to shut down. The command is in the form of a signal from received the
remote-indications relay board which has been set for this function.
◗ The inverter is started again.
MAINS 2 INPUT SWITCH Q4S IS OPEN
The bypass AC source (M2) input switch Q4S is open, i.e. backup power for the load via the bypass AC source (M2)
is not available.
INVERTER OUTPUT SWITCH Q5N IS OPEN
Inverter output switch Q5N is open, i.e. the load cannot be supplied via the inverter.
BYPASS SWITCH Q3BP IS CLOSED
Maintenance bypass switch Q3BP is closed. The system is in maintenance configuration and the load is supplied
by the bypass AC source.
STATIC SWITCH (M2) OFF
DUE TO AN OVERLOAD
The load is no longer supplied by the bypass AC source (M2), due to an extended overload. The buzzer sounds
continuously.
Appendices A — 786-133060-00 A00