Chroma 62000D Series, Operating And Programming Manual

Page: 163 / 180

Self Test and Troubleshooting
7-1
7. Self Test and Troubleshooting
7.1 Overview
Follow the actions described in this chapter to inspect the instrument and troubleshoot
problems if the power supply is unable to operate normally. Please consult the Chroma or its
sales agent if the information provided in this manual is unable to resolve the problem.
7.2
Troubleshooting
Operation problems and suggestions for resolution:
Problem Cause Resolution
Bad measurement for V, I Feature swings due to aged
components.
It needs calibration periodically.
See section 3.2.4.4 Calibration.
Output is not within
Accuracy SPEC. Feature swings due to aged
components. It needs calibration periodically.
See section 3.2.4.4 Calibration.
Over Temperature
Protection (OTP) 1. The ambient temperature is
too high.
2. The vent is blocked.
1. Operate the instrument within
the temperature of 0 ~ 40°C.
2. Clear the vent.
Over Power Protection
(OPP) The output power exceeds the
spec. Remove the over load or enlarge
the OPP settings.
Over Current Protection
(OCP) The output current exceeds the
spec. or OCP settings. Remove the over load or
enlarge the OCP settings.
Fan Fail Protection (FAN
LOCK) 1. The fan is out of order.
2. The feedback circuit is
abnormal.
Consult with your local sales
agent if it is unable to reset the
protection state.
Input Error Protection 1
AC FAULT The voltage of AC input line is
either too low or too high. Adjust the voltage if it exceeds
the spec. when measuring the
input voltage.
No output voltage 1. The output voltage feedback
is abnormal.
2. The D/D power stage is
damaged.
Consult with your local sales
agent if it is unable to reset the
protection state.
Over Voltage Protection
(OVP) The output voltage exceeds
the spec. or OVP settings. 1. Check the OVP settings.
2. Consult with your local
sales agent if it is unable to
reset the protection state.
Unable to control DC
power supply via GPIB 1. The address of DC power
supply is incorrect.
2. The GPIB cable is loose
and fallen at rear.
1. Update the address.
2. Check the cable connection
and secure it with screws.
D/D power stage error
protection (D/D FAULT) 1. The transient current is too
big.
2. The D/D power stage is
damaged.
1. When D/D FAULT protection
occurs, first turn off the
power supply and remove the
load. Also make sure cables
are connected correctly and
then power it on again.