Phase Technologies Essential Series - Page 49

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For faults that allow an automatic restart, the default number of restarts after a fault is zero.
If the end user desires the unit to automatically restart after a fault, the number of restarts
allowed and the time between fault and restart must be programmed in the CHANGE
PARAMETER VALUES > AUTO RESTART PARAMETERS for that fault.
If the drive has exceeded the programmed number of auto restarts, or if auto restarts have
not been enabled, the display will indicate the fault on the top line and the second line will
read RESTART? ENTER. Press ENTER to clear the fault and restart the load. The fault
counters in the Restart Log will all be reset to zero. See Section 4.9, Restart Log, for more
information.
The ENABLE RESTART parameter allows the drive to restart automatically after a fault.
This parameter also enables the drive to initialize in AUTO mode when the input power has
been cycled OFF/ON and the drive is energized. The factory default setting does not allow
auto restarts. Navigate to this parameter via CHANGE PARAMETER VALUES > AUTO
RESTART PARAMETERS > ENABLE RESTART. See
Table 15 for values in setting the parameter.
There are several conditions where the drive will indicate a fault but the fault will not be
recorded in the fault log. These faults occur only when the drive is energized from utility
mains and is initializing. If any of three conditions including ground fault, high input voltage
or low input voltage is detected, the display will indicate the fault and wait for the condition
to resolve before entering normal operating mode. If these conditions occur after the drive
has initialized, a fault will be logged and can be cleared in the normal manner.
Table 16 – Fault Codes
TEXT MESSAGE
DESCRIPTION / COMMENTS
NOTES
OUTPUT FAULT
Check for short circuit on output lines and load. Contact
factory
1
OVER
TEMPERATURE
Internal temperature of the switching modules exceeded
safe limits. Check fans and ventilation openings for
obstruction. Reduce ambient temperature.
2
BUS
OVERVOLTAGE
Sudden and severe regenerative power under high line
voltage conditions may result in bus overvoltage. Check
line voltage or consider increasing ramp up and ramp
down times.
2
PRECHARGE
FAIL
DC bus voltage did not reach normal level. Possible failure
of input modules or pre-charge circuit.
2
HIGH INPUT
VOLTAGE
Input voltage has exceeded a level for safe operation.
Reduce input voltage. General purpose buck/boost
transformers are compatible with Essential Series drives.
2
MOTOR
OVERLOAD
Output current has exceeded the value set for
OVERCURRENT LIMT in OPERATING PARAMETERS
menu. Check status of motor load. If output current limit is
increased, make sure it is within the limit of the motor
nameplate. Automatic restarts are set by RESTART
DELAY 1 in the AUTO RESTART PARAMETERS menu.
P, 2
DRY WELL KW
Real power in kW consumed by the load has fallen below
limit set in MINIMUM POWER under CHANGE
PARAMETER VALUES menu. Commonly used to detect
dry well condition.
P, 2