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Turn-On Checkout - 3
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In Case of Trouble
Dc source failure may occur during power-on selftest or during operation. Either the Error or the Prot
indicator on the front panel may be lit to indicate that a failure has occurred. If this occurs, turn the
power off and then back on to see if the error persists. If the error persists, the dc source requires service.
Selftest Error Messages
Error numbers and messages are read back with the SYSTem:ERRor? query. SYSTem:ERRor? returns
an NR1 and a string error message.
Table 3-1. Power-On Selftest Errors
Error No. Failed Test
Error 0 No error
Error 1
Output 1 non-volatile RAM CAL section checksum failed
Error 2
Output 2 non-volatile RAM CAL section checksum failed
Error 3
Output 3 non-volatile RAM CAL section checksum failed
Error 4
Output 4 non-volatile RAM CAL section checksum failed
Error 5
Non-volatile RAM CONFIG section checksum failed
Error 10
RAM selftest
Runtime Error Messages
Appendix C lists other error messages that may appear at runtime.
Line Fuse
If the dc source appears "dead" with the Power LCD off and the fan is not running, check your ac mains
to be certain line voltage is being supplied to the dc source. Also check that the line module on the rear of
the unit is set to the correct voltage. If the ac mains is normal, the internal line fuse may be defective.
Refer to Appendix E and follow the procedure described in the appendix for accessing and replacing the
line fuse located inside the unit. Unless the line voltage setting is incorrect, do not change the line
voltage setting.
NOTE: If the dc source has a defective fuse, replace it only once. If it fails again, the dc source
requires service.