Sequoia / Tahoe Series User Manual California Instruments
308 M447352-01 REV-A
Cause Solution
Mode or Voltage Range could only be performed with the output
off.
11.2.5 Parallel Group Faults When Leader Output Switch is Turned On
Cause Solution
Clock Config set to Auxiliary with Clock Mode
set to SYNC.
With Clock Config set to Auxiliary, Clock Mode must be either
Internal or External.
11.3 Basic Troubleshooting in Source and Grid Simulator Modes
Refer to the following tables for problems that might arise related to basic operation and connection of the
power supply in the Source or Grid simulator mode of operation.
11.3.1 FAULT LED is On
Cause Solution
Overcurrent (OCP) shutdown has occurred. CV/CL mode is select; change to CV/CC;
If excessive load current for the current setpoint, reduce the
load current
11.3.2 Excessive Output Voltage
Cause Solution
Measurement showing set value and output
will have nearly 4% extra voltage than set
voltage if External sense leads are not
connected if selected in external sense
mode.
Connect external sense wires to the rear panel AC/DC
Output/Sense connector.
The voltage at the AC/DC Output connector
is higher than that on the Sense connector.
If the External Sense is connected to the load, the voltage
output on Sense lines will be higher when the output is loaded
because of the output cable voltage drop.
11.3.3 Poor Output Voltage Regulation
Cause Solution
The unit is overloaded and in constant-current
mode.
Remove overload to allow constant-voltage operation.
The unit is programmed to the incorrect voltage
range required for the level of load current.
Select the correct voltage range.
Remote Sense lines are not connected to the
load.
Connect Remote Sense lines to the load and select
Remote(external) Sense for the voltage sense method.
11.3.4 Distorted Output
Cause Solution
Load is drawing nonlinear currents. Reduce load or add power sources in the parallel group.
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