Ricoh C231 Service Manual page 681

6.11 ABNORMAL VOLTAGE PROTECTION
This is for the AC220V ~240V machine only.
There is an automatic detection system [A] for unexpected voltage surges,
featuring automatic shut-off and data logging features.
Momentary voltage drop
SP 1-83 records the number of momentary interruptions.
NOTE: The machine can record only interruptions of very short duration. If the
machine does not get voltage continuously, the PSU will shut off.
Low voltage (less than 150V)
Records (SP1-83) the number of low voltage peaks.
High voltage
Records (SP1-83) the number of high voltage peaks.
AC300V to 400V
The machine records the occurrence, and if the PSU keeps getting the high voltage
continuously, the main switch will shut off automatically to protect the machine.
Over voltage (More than AC400V)
The machine will shut off immediately after recording the high voltage occurrence.
NOTE: 1) The main switch contains a solenoid to shut off the main switch
automatically.
2) The auto shut off mode can be set ON or OFF by SP2-80.
3) A message will be displayed when the machine is turned on the first
time after an auto shut off.
[A]
C267D955.WMF