Emerson E2 Manual do Operador descarregar pdf (Página 28)

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compressor has been off for several

seconds will not activate this code.

9 Module Supply Voltage Trip - If the module

supply voltage drops below 170 volts for 2

seconds, the compressor is shut down to

prevent contactor chatter. When the con-

trol voltage rises above 180 volts for 2 sec-

onds, the module will enable the compres-

sor to run again.

• The “Module Power” voltage is used to

make this determination.

A Compressor Module Failure Lockout - An

internal module fault has been detected

and communication with the rack con-

troller is not possible. To reset, shut off the

module power for 5 seconds or more - a

successful restart may or may not occur.

Remote resetting is possible if controller

communications still exist.

b Discharge Pressure Trip - The discharge

pressure has exceeded the setting of the

high pressure cutout switch (360 psi). The

module will enable the compressor to run

when the head pressure drops below the

switch reset level (250 psi).

• The module senses the voltage drop

across the pressure switch to deter-

mine whether the high discharge pres-

sure cutout switch is open. The high

discharge pressure switch is in series

with the pilot circuit

C Discharge Temperature Lockout - The

peak internal temperature has exceeded

the limit of 310º F. Manual reset or remote

reset is required to enable the compressor

to run again.

• The temperature probe in the head is

used to monitor the discharge tempera-

ture.

d Loss of Communication Mode - If commu-

nication is lost for 5 minutes or more, this

code will flash. The compressor will run in

stand-alone mode (“off” or “on” depending

on how the E2 “failsafe” has been

programmed). Normal operation will

resume when communications have been

re-established.

• A blinking decimal at the LED indicates

that communication between the mod-

ule and the Einstein™ is taking place.

E Disabled by Rack Controller - The com-

pressor is disabled until the module stops

receiving this command from the rack con-

troller.

F Phase Loss Trip / Lockout - One phase of

the compressor power is missing at start-

up or during running. The compressor will

shut down for a 5 minute period before it is

enabled to run again. If there are 10 con-

secutive trips, the compressor is locked

out. Manual reset, remote reset or remov-

ing module power for 5 seconds is

required to enable the compressor to run

again.

• The module monitors the voltage at the

three terminal plate connections.

L No 3-Phase Compressor Power Trip -

None of the 3-phases of compressor

power were delivered to the compressor

when the module issued a command for

the compressor to run.

• The compressor will run when power is

available if a run command is still issued

by the rack controller.

Decimal A decimal point blinks during communica-

point tion with E2. This occurs several times a

minute. It is a quick way to verify that

communication between the module and

the rack controller has been established.

The decimal is on the lower right-hand

corner of the 7-segment display.

AE8-1337 R1

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