48
6 OTHER FUNCTIONS
6-1. Display in alarm status
When the PSF Series power supply unit enters the alarm status or the function
described in Section
”5-7-5. Alarm function using external contacts”
is used,
the alarm code shown below is displayed, indicating that an alarm occurs in the
power supply unit. When an alarm occurs, the power supply unit turns off
output and stays in the alarm status. When a protection function (excluding
OVP and OCP described in Section
“5-5-2. OVP/OCP function (02)”
works, all
operations (panel operation, etc.) are disabled and the power supply unit stops
operation.
Press the ESC/DISP key for one second to reset the OVP or OCP alarm
(described in Section
“5-5-2. OVP/OCP function (02)”
) Turn off the input
power source or shut off the POWER switch and throw it again to reset the
protection function.
Type of alarm
Display Description
OVP alarm
This alarm code is displayed if the output voltage
exceeds the preset OVP value.
OCP alarm
This alarm code is displayed if the output current
exceeds the preset OCP value.
OHP alarm
The OHP alarm is displayed if the temperature at the
internal detection point exceeds the set temperature.
The displayed alarm differs with the models as shown
below.
Over-voltage (OVP)
Output is turned off if the
voltage exceeds 110% of the
rated output voltage.
Over-current (OCP)
Output is turned off if the
current exceeds 110% of the
rated output current.
HARD alarm
Alarm using external
contacts ALARM
Alarm is caused when the
contacts are short-
circuited.
◆
For details, see section
”5-7-5. Alarm function
using external contacts”
above.
