Technical data

4 Error Messages
Self-Test Error Messages
132 E364xA User’s and Service Guide
608 Serial configuration readback failed
This test re-sends the last 3 bytes of serial configuration data to all serial paths (SERDAT, SERBCK, and
SERCLK). The data is then clocked back into U130 and compared against the original 3 bytes sent. A
failure occurs if the data do not match. This test checks the serial data path through U138.
609
[1]
System ADC test failed
This test checks if the ADC hardware is functional. The main controller U10 establishes communication
with the ADC and checks if there are any error bits set for the ADC's status reporting.
624 Unable to sense line frequency
This test checks that the LSENSE logic input U121 is toggling. If no logic input is detected, the power
supply will assume a 50 Hz line operation for all future measurements.
625 I/O processor did not respond
This test checks that communication can be established between U121 (U10 for serial MY53xx6xxx) and
U103 (U752 for serial MY53xx6xxx) through the optically-isolated (U108 and U109) (U751 for serial
MY53xx6xxx) serial data link. Failure to establish communication in either direction will generate an
error. If this condition is detected at the power-on self-test, the power supply will beep and the error
annunciator will be turned on.
626 I/O processor failed self-test
This test causes the earth-referenced processor U103 (U752 for serial MY53xx6xxx) to execute an
internal RAM test. Failure will generate an error.
630 Fan test failed
This test checks if the fan current is flowing. If the current is not detected at the power-on self-test, the
power supply will beep and the error annunciator will be turned on. Fan test failure could likely induce
an overtemperature condition in the power supply.
631 System DAC test failed
This test checks if the DAC hardware is functional. The main controller U121 (U10 for serial
MY53xx6xxx) sends a reference voltage data to the DAC and converts the DAC output to digital data to
determine if the digital data is within a valid range.
632 Hardware test failed
This test checks the status of voltage and current error amplifiers for the power circuit. If both amplifiers
are not operational, the power supply will beep and the error annunciator will turn turned on.
[1] This error message is only applicable for serial MY53xx6xxx.
Table 4 - 2 Self-test error messages (continued)