19.
TRO
UBLESHO
OTIN
G
Power Loss
The diagram below shows what happens when power is lost and then restored.
A
Battery fully charged and mains power is powering the unit
B
Mains power failure, unit running on battery.
C
20 minutes after mains failure, power is shut off.
D
If mains power failed for a significant amount of time, the voltage of the battery
may dip below the set 11.5 volts threshold.
E
Mains power restored; battery charging begins.
F
Battery reached set threshold level.
G
30 minutes after battery reaching the threshold level, transactions can now take
place.
▪
After mains power to the unit is lost it will no longer allow transactions, but the user will
still be able to obtain a receipt that was generated before the power outage.
▪
A receipt can be obtained for up to 20 minutes after mains power failure. The unit will
completely power down after 20 minutes. After restoring mains power, the unit will
power up. If the voltage of the battery dipped below the threshold level at any time,
transactions will be disabled until the battery has been charged for at least 30 minutes
above the threshold voltage. This is to ensure there is enough power to print receipts
should power fail again.
▪
If the battery voltage does not dip below the threshold level while the mains power is
disconnected, normal operation can resume as soon as mains power has been restored.