Low Voltage Protection - Profroid GSB Notice D'instructions

3.3 Insufficient oil pressure protection
The CoreSense™ Diagnostics module replaces the mechanical oil pressure switch. Furthermore, it provides the added value of
communication for insufficient oil pressure warning and lockouts via LED flash codes and/or a supervisory pack controller. Total
insufficient oil pressure time for the compressor is stored and accumulated in the module memory.
CoreSense™ Diagnostics
4 seconds.
Once the oil pressure differential falls below 0.48-0.62 bar for 2 minutes (120 sec), the module will shut the compressor off and a "low
oil pressure lockout" will be reported. Before using the reset button, troubleshooting needs to be done to understand the failure. The
compressor will switch back on once the reset has been activated either manually or remotely through the communication network, or
when power has been cycled to the CoreSense™ module.
This feature is not applicable to Copeland compressor models 4MTL (Stream CO2 compressors) as these have no positive oil pump
fitted and are "splash" lubricated.
3.4 Motor overheat protection
Using Positive Temperature Coefficient (PTC) sensors on 4M* and 6M* Stream compressor models, the CoreSense™ Diagnostics
module provides motor overheating protection. The CoreSense™ Diagnostic module replaces the Kriwan module INT69TM.
Alarm condition:
Trip condition: PTC Resistance > 4.5 kΩ;
Reset condition: PTC Resistance < 2.5 kΩ; 5 min time delay.
3.5 High discharge temperature protection
Discharge temperature protection is provided using a NTC sensor in the compressor cylinder head. The sensor is pre-installed at the
factory and connected to the module. CoreSense™ will protect the compressor from high discharge temperature conditions. If the
temperature sensor detects a discharge temperature higher than 154°C, the CoreSense™ will shut off the compressor until the
temperature cools down to an acceptable level (about 130°C).
Either trip or lockout alarm can be selected by user. Default is trip alarm.
Trip/lockout value ≥ 154°C for 2 sec.
Trip alarm: Automatic reset after 2 minutes; discharge temp < 130ºC.
Lockout alarm: Manual reset is necessary.
3.6 Locked rotor protection
Appears when the rotor is mechanically seized. Locked rotor current is expected to decrease within 4 seconds after the motor comes
up to speed.
3.7 Missing phase protection
If any one of the 3 power phases is missing immediately after the compressor contactor is energized, a single-phasing condition exists.
The maximum response time shall be 1.2 seconds from the time of contactor energization.
Alarm condition: If any phase voltage < 84% of max of 3 input voltages for a period of 1 second.
Trip time: 5 minutes with automatic reset.
Lockout condition: Appears after the 10 consecutive trip alarms. Manual reset (using reset button below
the module or using remote reset by pack controller).
In the case of a part winding motor this feature is detectable for primary winding only. Missing phase, voltage imbalance and low
voltage are not detectable for the secondary winding. A missing phase can be detected during start-up, but not while the motor is
running.

3.8 Low voltage protection

Appears when there is a low supply voltage.
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.
will issue a warning when oil pressure differential falls below 0.48-0.62
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