Control-panel display (cont.)
List of secondary messages
LOAD ON MAINS 2
The load has been transferred to the bypass AC source (M2) and is no longer protected (only in
MAINS 2 OUTSIDE TOLERANCES TRANSFER DISABLED
CHECK MAINS 2
The bypass AC source (M2) frequency or voltage is outside tolerances and the inverter is unable to synchronise.
Transfer of the load from the inverter to the bypass AC source (M2) or vice- versa will result in an interruption of the supply of power to the load. The buzzer sounds slowly and discontinuously.
BATTERY OVERTEMPERATURE, CHECK VENTILATION
The battery temperature is outside tolerances. The buzzer sounds slowly and discontinuously.
BATTERY ROOM VENTILATION FAULT,
CHECK VENTILATION
A fault requiring servicing has occurred in the battery room ventilation system. The rectifier/charger shuts down after a
The user must take steps to re- establish correct operation of the ventilation system.
If a harmonic filter is present in the installation, this message also signals an abnormally high temperature in the filter inductor.
The buzzer sounds slowly and discontinuously.
MAINS 1 OUTSIDE TOLERANCES, CHECK MAINS 1
The normal AC source (M1) frequency or voltage is outside specified tolerances and the rectifier/charger has shut down. The inverter is on battery power.
MAINS 1 INPUT SWITCH Q1 IS OPEN
The normal AC input (M1) switch Q1 is open. It must be closed for rectifier/ charger
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
OVERLOAD
RATED CURRENT PER PHASE = XXX A
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 TO 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
FREQUENCY CHANGE
BY AN EXTERNAL COMMAND
The inverter has received a command to change its output frequency (50 Hz or 60 Hz). This command is not effective unless the inverter has first been shut down. The frequency is changed when 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.
