Internal monitoring
2280073 Rev.1
Page 28
Internal monitoring
The MC1500 has several internal monitoring functions that ensure safe operation. These
functions are individually described in the following sub-sections.
8.1 Mains power monitoring
If the supply voltage drops below 85V, the MultiCharger signals a fault and switches off. The
message
"Mains error"
appears on the LCD.
If the supply voltage rises above 90V, the MC1500 can be made ready for use by pressing
button 1 (On/Off).
8.2 Monitoring of intermediate-circuit voltage
Intermediate-circuit voltage is monitored for undervoltage and overvoltage. If either limit (350V
and 430V, respectively) is passed, the MC1500 signals a fault and switches off to the unlocked
position. The message "
PFC error
" appears on the LCD and the red LED comes on. If either of
the limits is exceeded again after restarting, the MultiCharger is switched off to the locked
position.
8.3 Output overvoltage
For safety reasons, the output voltage is monitored for excessive levels in two independent
ways.
The threshold of the controller-independent hardware monitoring for the overvoltage output is
fixed at 16V or 32V. This monitors the internal output voltage. If the internal voltage exceeds
this threshold, the MC1500 signals a fault and switches off to the locked position. The message
"
OVP error
" appears on the LCD and the red LED comes on.
The digital-monitoring threshold for overvoltage output is adjustable. The default setting for this
is also 16V or 32V. If the output voltage exceeds this threshold, the MC1500 signals a fault and
switches off to the locked position. The message "
Overvoltage
" appears on the LCD and the red
LED comes on.
8.4 Output undervoltage
The monitoring threshold for output undervoltage is 7V or 14V.
If the output voltage falls below this threshold, the MC1500 signals a fault and switches off to
the locked position. The message "
Voltage too low
" appears on the LCD and the red LED
comes on.
