Front Panel Operation 22
DO NOT at any time disconnect the wires from the Vs+ and Vs- terminals to the DUT while output is
enabled (ON). Doing so may damage the power supply and cause unstable output.
3.4 Voltage/Current Measurement
The display will show the set voltage and current values and the measured values of the output.
System Messages
The MR has built-in sensors to detect system conditions. If a fault status occurred, the error message will show on
the display and automatically protect the power supply output. The following display occurs when the fan has failed or
stopped turning:
System Message Description
MEMORY CHECK ERROR ! Cannot read or write the internal non- volatile memory
OVER TEMPURATURE PROTECT ! Internal temperature is too high and the protection mechanism is activated
FAN ERROR ! FAN not functioning
HW Fail OVP Module hardware over voltage
HW Fail OCP Module hardware over current
CALIBRATION ERROR ! Calibration cannot be done
AC FREQUENCY ABNORMAL ! AC input frequency is out of range
AC VOLTAGE ABNORMAL ! AC input voltage is out of range
PFC ERROR ! PFC not functioning correctly
POWER OFF ! Power supply is powering o
OUTPUT SHORT CIRCUIT Output voltage drop too fast
HW Fail BVbus Module hardware fail
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