User`s guide

Chapter 5 Service
Self-Test Procedures
107
5
606
Rundown gain out of range This test checks the nominal gain between the
integrating ADC and the U19 on-chip ADC. The nominal gain is checked to ±10%
tolerance.
607
Rundown too noisy This test checks the gain repeatability between the integrating
ADC and the U19 on-chip ADC. The gain test (606) is performed eight times. Gain
noise must be less that ±64 lsb’s of the U19 on-chip ADC.
608
Serial configuration readback failed This test re-sends the last 3 byte serial
configuration data to all the serial path (SERDAT, SERBCK, SERCLK). The data is
then clocked back into U20 and compared against the original 3 bytes sent. A failure
occurs if the data do not match. This tests checks the serial data path through U23.
609
System ADC test failed This test checks if the ADC hardware is functional. The
main controller U101 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 LSENCE logic input U19
is toggling. If no logic input 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 communications can be
established between U19 (U101 for serial MY53xx6xxx) and U1 (U802 for serial
MY53xx6xxx) through the isolated (U2 and U5) (U801 for serial MY53xx6xxx) serial
data link. Failure to establish communication in either direction will generate an error.
If this condition is detected at power-on self-test, the power supply will beep and the
error annunciator will be on.
626
I/O processor failed self-test This test causes the earth referenced processor U1
(U802 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 power-on self-test, the power supply will beep and the error annunciator
will be on. Fan test fail could likely induce overtemperature condition in the power
supply.
631
System DAC test failed This test checks if the DAC hardware is functional. The
main controller U19 (U101 for serial MY53xx6xxx) sends a reference voltage data
to DAC and converts the DAC output to digital data to see if the digital data is within
a valid range.