Emerson COPELAND EAZYCOOL Technical Information

Date of last update: Dec-19
C
OPELAND
1 Overview of possible alarm conditions
Alarm
Condition
code
1.1
RCD tripping
N/A
(system trip)
1.2
2.1
High-
pressure HAC1
2.2
cut-out
2.3
2.4
Receiver
pressure
cannot be
3.1 kept at the LP_REC
setpoint (the
pressure is
too low)
3.2
Receiver
pressure
cannot be
kept at the Pre_HPREC
setpoint (the
3.3
pressure is
too high)
4.1
Several
Strange unit
codes
behaviour
possible
4.2
5.1
Low suction LAC1
pressure LPC1
5.2
CC7.8.18/1219/E
E C ™ CO
AZY OOL
T
ROUBLESHOOTING
Possible root cause
The jumper between the neutral and
the ground on the unit power supply
terminals is not removed
The RCD is not a type B or B+
Gas cooler outlet sensor defect
High-pressure switch defect
Power interruption of the unit
Dirty gas cooler/condenser
Leakage in the system
The setpoint for the receiver
pressure is too high
One of the pressure sensors gives
an incorrect value continuously or
temporarily
One of the sensors gives an
incorrect value
HP valve and LP valve are in manual
mode
Suction pressure too low because of
leakage in the system
Suction pressure is too low during
pumpdown
R
EFRIGERATION
2
G
UIDE
Troubleshooting
Remove the jumper between the neutral and the
ground on the unit main power supply terminals
Replace the RCD with the appropriate type (see
application guidelines recommendations about
appropriate RCD)
Check the gas cooler outlet sensor value and
compare it to the real measurement. To check the
sensor values, go to chapter 5
sensor values". If the values show a significant
difference, replace the sensor.
Replace the high-pressure switch
The charge must be partially or fully released, and
the unit must be recharged
Clean the gas cooler
Find and eliminate the leakage
Check parameters GC20 and GC78. To access
the parameters, go to chapter 3
parameters in Pr1 & Pr2
Check the sensor value and compare it to the real
measurement. To check the sensor value, go to
chapter 5 "How to read the sensor
Download the parameter log file and check for
abnormal pressures during the last period. If the
values show a significant difference or are
abnormal for some periods replace the sensor. To
download the parameter log, go to chapter 4
to get the alarm and operating conditions
history via USB flash"
Check the sensor value and compare it to the real
measurement. To check the sensor values, go to
chapter 5 "How to read the sensor
values show a significant difference replace the
sensor.
Verify in the [Service -> Gas Cooler Info -> OVR]
that the "Lock" sign is open as it should be.
Find and eliminate the leakage
Modify pumpdown settings (see chapter 2.10.2
"Pumpdown mode" in application guidelines)
Ref: CC7.8.18/1219/E
Application Engineering Europe
U
NIT
"How to read the
"How to access
levels"
values".
"How
values". If the
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