bonitron M3645P, Reference Manual

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User’s Manual
33
4.4.
F
AULTS
The M3645P monitors a number of different fault conditions which prevent
regeneration from occurring. Some faults latch until they are reset by toggling the
enable input. Faults that do not latch will automatically clear when the fault condition
is no longer present. Every fault opens the Ready Output contact (4.5.5).
On units with a digital display, the display stores the last 50 fault records (4.3.5). On
units without a digital display only the most recent fault state can be viewed. T
he unit’s
most recent fault state may be accessed by disabling the unit (4.5.2), then setting the
Fault Recall Input (4.5.3) high. The red Not Ready LED (4.2.2.3) will blink out all the
faults of the most recent fault state, in sequence.
CAUTION!
Faults will not prevent the power supply from operating. Only the
regeneration mode will be disabled during a fault event.
Table 4-1: Blink Codes
F
LASHES
F
AULT
Solid Unit is not Enabled
1 Fast Feedback Undervoltage
2 Fast Overtemperature
3 Fast DC Overvoltage
4 Fast Differential Overvoltage
5 Fast Sync Loss
1 Slow IGBT Driver
2 Slow Phase Overcurrent
3 Slow Phase Loss
4 Slow DC Undervoltage
5 Slow Regen Power-On/Precharge Not Complete
6 Slow Frequency Detect Failure
Note: Slow: 1 blink per second
Fast: 3 blinks per second
4.4.1.
F
EEDBACK
U
NDERVOLTAGE
This fault indicates that
the unit’s DC bus feedback circuitry has failed. This
fault will latch until manually cleared by toggling the Enable Input. If this fault
does not clear, it typically indicates that damage to the M3645P has occurred
and must be repaired.
4.4.2.
O
VERTEMPERATURE
This fault indicates that the unit has exceeded its safe operating temperature.
This fault will automatically clear when the unit's temperature has returned to
a safe level.
CAUTION!
Note: Since the Overtemperature Fault cannot shut down the power supply
directly, the overtemp output should be used to disable the drive in the event
on an overtemp. Otherwise an overload condition may result in catastrophic
failure.