Emerson CORESENSE, Техническая информация

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D7.8.4/0112-0415/E 16/17
Flash
code
Alarm conditions Possible failure reasons Troubleshooting measures
4
Connection lost
between sensor
module
and
current sensor
Alert: Appears when the signal from
current sensor is not communicated
to the sensor module.

The current sensor is not
connected to the sensor
module.

Faulty current sensor.

Faulty sensor module.

Check if the CT connector is connected to the sensor module. If not connect the
4-pin current sensor connector into the sensor module.

Check if there is continuity between pin 3 & 4 (closest to the latch) of the current
sensing connector. The resistance should be less than 1
Ω. If the resistance is
greater than 1
Ω, replace the current sensing module. Be certain that the
receptacles are fully engaged in the connector block.

Check if the Amp and Volts values are correctly displayed. If not, inspect the
wire harness connector to ensure that the pins are fully engaged.

If the above-mentioned trouble shooting measures did not give positive results,
the reason is mis-installed connector or faulty sensor module. Replace the
faulty sensor module with new one.
5
Communication
error
Alert: Appears when there is no
communication
between control
module and sensor module or pack
controller

Communication between
CoreSense control module
and pack controller has been
lost.

Communication between
CoreSense control module
and sensor module has been
lost.

Is there a communication network? If not, set the network dip-switch to "stand-
alone" and press reset.

Is there a communication network? If not, check that the communication
harness is engaged at both the CoreSense module and the sensor module.

If the LED on the top edge of the sensor module is dark, check 24 VAC power
to the sensor module, or replace the sensor module.

If communication network amber light is continuously on, reverse the
communication wire polarity. If voltage between centre pin and the right or left
pin is not 2.3-2.6 VDC, inspect for communication wire failure or wire strands
that are "shorting" between the wires or to ground.
6
Locked rotor
Trip: Appears when excessive current
is present in the compressor. Refer to
AE bulletin for more details.
Lockout: Appears when 10
consecutive locked rotor trip alarms
occur.

Motor rotor is mechanically
seized.
Excessive current
present in the compressor.

Damaged valve plates in
cylinder head.

Check that motor voltage is adequate (± 10% of nominal rated voltage),
especially during the starting event.

Start compressor with no load. If it does start with no load, inspect the valve
plate(s) for damage or look for other causes of leak-back.
7
Missing phase
Trip: Appears when there is a missing
phase / single phasing.
Lockout: Appears when 10
consecutive missing phase trip
alarms occur.

Loose wiring connections at
the
terminals inside
compressor T-Box.

Worn out contactors.

Line break in one of the
phases.

Check voltage supply from the main power buss.

Check voltage into and out of contactor. Repair or replace contactor if
necessary.

Check that motor electrical connections are tight at the compressor motor
terminals.