Emerson iPro SERIES Informações Técnicas descarregar pdf (Página 16)

Technical Information

D7.21.2/1011/E

16/17

Flash

code

Alarm conditions

Possible failure reasons

Troubleshooting measures

Connection lost

CT to sensor

Warning: 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.

Verify if the CT connector is connected to the sensor module. If not connect the 4-pin

current sensor connector into the sensor module.

Verify 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.

Verify 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 didn't give the positive results, the

reason is faulty sensor module or mis-installed connector. Replace the faulty sensor

module with new one.

Communication

Error

Warning: Appears when there is no

communication between control

module and sensor module or rack

controller

Communication between

CoreSense™ control module and

rack controller has been lost.

Communication between the

CoreSense™ control module and

the 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, verify 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, verify 24VAC 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 isn't 2.3-2.6VDC,

inspect for communication wire failure or wire strands that are "shorting" between the

wires or to ground.

Locked rotor

Trip: Appears when the excessive

current is present in the compressor.

Refer 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.

Verify 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.

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.

Verify voltage supply from the main power buss.

Verify voltage into and out of contactor (Repair or replace contactor if necessary).

Verify that motor electrical connections are tight at the compressor motor terminals.

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