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Self Test & Troubleshooting
7.
Self Test & Troubleshooting
7.1 Overview
Follow the actions described in this chapter to inspect the instrument and troubleshoot the
problem first when the 62012P Series DC Power Supply is unable to operate normally. Please
consult the Sales agent or distributor 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 3.3.7 Calibration.
Output is not within
Accuracy SPEC.
Feature swings due to aged
components.
It needs calibration periodically.
See section 3.3.7 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 local sales agent if it is
unable to reset the protection
state.
Input Error Protection 1
AC OFF
The voltage of DC Power
Supply input line is either too
low or too high.
Adjust the voltage if it exceeds
the spec. when measuring the
input voltage.
Input Error Protection 1
BUS_OVP
1. The DC_BUS feedback is
abnormal.
2. The control IC (UC3854) is
out of order.
3. The AD power stage is
damaged.
Consult local sales agent if it is
unable to reset the protection
state.
No output voltage
1. The output voltage feedback
is abnormal.
2. The D/D power stage is
damaged.
Consult local sales agent if it is
unable to reset the protection
state.
Over Voltage Protection
(OVP)
The output voltage exceeds the
spec. (88V) or VOP settings.
1. Check the OVP settings.
2. Consult local sales agent if it
is unable to reset the
7-1