4 Error Messages
154 E364xA User’s and Service Guide
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.
[a] This error message is only applicable for serial MY53xx6xxx.
Table 4-2 Self-test error messages
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