Voltage Imbalance Protection; Flash Memory Information; The Following Asset Information Will Be Saved In The Flash Memory (Eeprom); Compressor Running Status Information Will Be Saved In The Flash Memory (Eeprom) - Emerson CoreSense Technical Information

Alarm condition: Motor compressor voltage < low voltage setting at compressor running state. The default low
voltage setting is 75% of the nominal line voltage stored in the module for 2 sec.

Trip Time: 5 minutes.
The module determines the operating frequency of the compressor. The compressor low voltage setting shall be
lowered by the same percentage as the operating frequency if less than the nominal frequency. For example if a
60 Hz nominal frequency compressor is running at 57 Hz (5% less), then the low voltage setting shall be reduced
by 5%.
3.9

Voltage imbalance protection

The purpose of this protection feature is to protect the compressor against a voltage imbalance condition that leads
to motor overheating.
A configurable setting (default = 5%) for voltage imbalance is used to determine the operating limit of the
compressor.
Alarm condition:

Trip: When the voltage imbalance > 5% (configurable).

Reset: Automatic reset after 5 min; voltage imbalance < 5%.

3.10 Flash memory information

Emerson Climate Technologies can provide a software to access EEPROM information.

3.10.1 The following asset information will be saved in the flash memory (EEPROM);


Compressor model number

Compressor serial number

Compressor model number modified

Compressor serial number modified

Sensor module firmware revision

3.10.2 Compressor running status information will be saved in the flash memory (EEPROM):


Number of compressor running hours

Number of compressor starts

Number of resets and type of reset

Accumulated runtime without good oil pressure

Number of relay cycles

3.10.3 Compressor Operating Parameters


Current

Voltage

Power factor

Power consumption

Discharge temperature values
®
3.11 Modbus communication
CoreSense™ Diagnostics has communication capability via a Modbus
enabled, CoreSense™ warnings, trips and lockouts can be displayed and recorded in a pack controller such as the
iPro Rack Controller from Dixell.
The CoreSense™ Diagnostics module is compatible with any other pack controller that has Modbus

3.12 Local and remote reset

The CoreSense™ Diagnostics module is equipped with a reset button placed below the control module. The reset
button may be pushed as necessary to stop the compressor.
The CoreSense™ Diagnostics module is equipped with a remote reset capability, such that if a compressor is off in
a lockout condition, the user can remotely restart the compressor through their rack controller or compatible remote
access software.
NOTE: Service contractor and end user policies need to be considered when deciding whether or not to
use the remote reset feature in the pack controller.
Technical Information
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network connection. With communication
D7.21.2/1011/E
®
protocol.
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