Definition Of Log Entries - GE LOGIQ E9 Service Manual

PROPRIETARY TO GE
D 5180483-100, R . 7 LOGIQ E9 P S M
IRECTION EV ROPRIETARY ERVICE ANUAL
7-9-4-6 Main Power Supply Logs (cont'd)
NOTE: Some power supplies may report a missing USB Hub, This is considered normal for MPS P/Ns
5205250-4 or later and 5205254-2 or later. This Hub is not used and has been depopulated.
USBConfig: Optional USB device "PowerSupply Hub" not found
7-9-4-7

Definition of Log Entries

The Power Supply reports information to the application software upon request. It eventually shows up
in logfile.txt. The application software requests the information (shown in examples). Most of the
information is self-explanatory. A few items need some explanation:
"ACErr" can be misleading. Whenever AC is removed from the Power Supply, it is considered to be an
error. Even if the system is OFF (Power Supply is really in stand-by) and then AC is removed. This is
normal operation and not really an error, but the Power Supply reports it as an error.
"TS On Strobe" error can also be misleading. The TS On Strobe comes from the GFI. This is a watchdog
signal that should always be there. If the GFI "hangs", then TS On Strobe should stop. The Power
Supply will then turn the TS supplies OFF and report an error to the application software. But during
normal power-up, the Power Supply looks for the TS On Strobe signal. Because the GFI has not booted
up completely yet, it does not send out TS On Strobe right away. The Power Supply considers this an
error at every start-up (but it really is not). The application software clears this error before scanning.
Another area that is misleading is the reported voltage. For example, a system error occurs that requires
the card rack voltages to turn OFF. The Power Supply turns the voltages OFF. Then the application
software requests the system voltage information. The Power Supply will report some voltage between
0 volts and the normal voltage. This is not a voltage failure, but rather an effect of something else that
happened. Think of it as a domino effect. You need to look for the first domino in order to find the root
cause of the problem.
7 - 216 Section 7-9 - Troubleshooting Tips