ATLAS 33 of 44 User’s Manual
iPM Error Codes
Reported in Alarm
Events History ***
Description / Recommended Action
An AC voltage surge event > 330Vac
occurred. Fault should clear when AC is
within limits, if not replace iPM module
or modules.
The AC voltage dropped below 80 volts.
The iPM will recover when AC voltage
goes back above 90 volts.
Over
Temperature
Shutdown
This fault triggers when the heatsink
temperature ≥ 115°C (239°F). The iPM
will shut down for protection and turns
back on at 100°C (212°F).
Heat Sink
Temperature
High
This fault triggers when the heatsink
temperature goes above 100°C
(212°F). The fault will clear below
100°C (212°F).
Heat Sink
Temperature
Failure
The heatsink temperature sensor has
failed. The iPM will continue to function
but should be replaced so as to protect
against additional damage.
The DC output fuse has opened.
Replace the iPM.
The iPM had or has a power stage
problem. If fault code does not clear
replace the iPM.
The iPM output voltage is either to high
or is connected to a DC supply that is to
high. Verify battery voltage and if fault
does not clear replace iPM.
The fault code happens when the short
pin on the iPM edge connector is not
making proper contact with the
backplane shelf unit connector. Verify
proper iPM engagement with the shelf
connector.
*** If a value other than the number listed above is recorded in the alarm events then that means that
more than one iPM fault code was active at that time. The values will be added together. ( Example: Heat
sink Temperature High and Over Temperature Shutdown will give you a 256+32=288 )
Figure 11.10-3 iPM Fault Code
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