CHAPTER 2: INSTALLATION
MAINTENANCE & TROUBLESHOOTING
3. Maintenance & Troubleshooting
3.1. Maintenance
Daily, ensure that the Power LED’s are on for all of the power and active modules.
3.2. Troubleshooting
The following guide will help the operator to diagnose problems in active modules or chassis’. If none of the items in this
section are of help, please contact ATX for Technical Support.
3.2.1. Module Will Not Fully Insert into Chassis
a) Remove the module and inspect it for damage or bent guide rails.
b) Inspect the chassis for bent metal or obstructions.
c) Be sure that the active module is inserted such that the left side is above an odd numbered slot and the right side is
above an even number slot.
d) Try the module in a different slot. Due to machinery tolerances, some modules may be more snug in some slot than
others. If the tolerances are unacceptable, contact ATX.
3.2.2. Module Power LED Off or Intermittent
Check the GREEN Power LED on each Power Supply module. If one is off or intermittent, then the chassis is not getting
correct power. Refer to the MNAC/MNDC Not Powering Chassis troubleshooting section. If power availability is not an issue
and other modules in the chassis are okay, the module itself is suspect. Continue.
Remove the suspect module and trade slot positions with another functioning module.
a) If the suspect module is okay and the previously good module fails, contact ATX and report a defective chassis.
b) If the suspect module fails and the previously good module is okay, contact ATX and report that the suspect module
is defective.
3.2.3. MNAC/MNDC Not Powering Chassis
NOTE:
220 VAC applied to an MNAC 110 will damage the module, but 110 VAC applied at an MNAC-220 will simply not turn
it ON.
a) Check the fuse continuity on the MNAC or MNDC module
b) Verify that the 110 VAC/220 VAC electrical outlet is active using a voltmeter and checking the circuit breaker (in the
case of the MNDC, insure that there is -48 VDC on the rear terminal block).
c) Verify that the IEC power cord is properly inserted into the receptacle on the rear of the module and properly
connected to a 110 VAC/220 VAC electrical outlet.
MAXNET
®
– MNAC/MNDC Modular Power Supply – Installation & Operation Manual
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CHAPTER 3: MAINTENANCE & TROUBLESHOOTING
