Error Messages 4
E364xA User’s and Service Guide 153
606
Rundown gain out of range
This test checks the nominal gain between the integrating ADC and the U121
on-chip ADC. The nominal gain is checked to a ±10% tolerance.
607
Rundown too noisy
This test checks the gain repeatability between the integrating ADC and the
U121 on-chip ADC. The gain test (606) is performed eight times. Gain noise
must be less than ±64 LSB of the U121 on-chip ADC.
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
[a]
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.
Table 4-2 Self-test error messages
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