Riello MST 40 - Status, Commands, and Warning Codes

S TATUS / ALARM CODES
By using a sophisticated self-diagnostic system, this UPS can check and indicate on the display panel its status and any error
and/or fault occurred during operation. Whenever a problem arises, the UPS signals the event by showing the code and the
corresponding alarm on the display.
 Status: these codes indicate the current status of the UPS.
CODE DESCRIPTION
S01
Precharging
S02
Load not powered (stand-by status)
S03
Start-up phase
S04
Load powered by bypass line
S05
Load powered by inverter
S06
Battery operation
S07
Waiting for batteries to recharge
S08
Economy mode enabled
S09
Ready for start-up
S10
UPS locked – load not powered
S11
UPS locked – load on bypass
S12
BOOST stage or battery-charger locked – load not powered
S13
Frequency converter - load powered by inverter
 Commands: these codes indicate that a command has been activated.
CODE DESCRIPTION
C01
Remote switch-off command
C02
Remote load on bypass command
C03
Remote start-up command
C04
Battery test running
C05
Manual bypass command
C06
Emergency switch-off command
C07
Remote battery charger switch-off command
C08
Load on bypass command
 Warnings: these messages refer to a specific configuration or operation of the UPS.
CODE DESCRIPTION
W01
Low battery warning
W02
Programmed switch-off enabled
W03
Programmed switch-off imminent
W04
Bypass disabled
W05
Synchronisation disabled (UPS in Free running mode)