Application
Engineering
Application
Engineering
B
L LL E L T EI
BU U
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N
AE
November 2006
AE8-1337 R1
Intelligent Store Discus™ V1.0 Operators Manual
The Intelligent Store Discus™ product line has recently been introduced on 2D, 3D, and 4D compressors.
This product integrates a number of important sensing and compressor protection functions including:
• Network Communications Interface (NCI) for on/off control of the compressor, capacity modulation, and
communication of compressor status to the Computer Process Controls (CPC) E2 rack controller
•
Low oil pressure protection
•
Discharge temperature protection
•
High discharge pressure protection
•
Low suction pressure protection
In addition, a prominent 7-segment display on the front of the Intelligent Store Discus compressor
indicates at a glance the operational status of the compressor.
This manual is also available from the Emerson Climate Technologies Publications Department (Form 2006CC-15).
© 2010 Emerson Climate Technologies
Printed in the U.S.A.
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AE8-1337 R1
Emerson Climate Technologies
Intelligent Store™ Discus®
Operator’s Manual
AE8-1337 R1
Table of Contents
1
2
3
4
Overview of Emerson Climate Technologies Intelligent Store™ Discus®
1.1 Functionality
1.1.1
Diagnostics
1.1.2
Communications
1.1.3
Fault History
1.2 Features
1.2.1
Compressor Protection
1.2.2
Remote Reset
1.2.3
Failsafe Operation
1.2.4
Welded Contactor Protection
Installation Instructions
2.1 Mounting and Installation
2.2 Terminal Box Connections
2.2.1
Current Relay Connections
2.2.2
Fan Connections
2.3 Controller Requirements
2.4 Communications Network
2.5 Network Termination and Cable Routing
2.5.1
Wiring Types
2.6 Intelligent Store™ Discus® Service Manual
2.7 Compatibility of Service Compressors
2.8 Intelligent Store™ Discus® Compressor Model Numbers
Intelligent Store™ Discus® Commissioning Process
3.0 Network Setup
3.1 Node Recovery
3.2 Suction Group Setup
3.3 Configuring Associations
3.4 Compressor Naming
3.5 Proofing
3.6 Welded Contactor
3.7 Failsafe Operation
3.8 Remote Reset
3.9 ISD Module Status
3.10 Intelligent Store™ Discus® Commissioning Procedure for
E2 Firmware Revisions 2.07 through 2.20
3.11 Node Recovery
3.12 Optional Commissioning Procedures
3.13 Configuring Applications
3.14 Compressor Naming
3.15 Suction Pressure Mapping
3.16 Remote Reset
3.17 Failsafe Operation
3.18 Suction Group Setup
3.19 Welded Contactor
3.20 Proofing
Compressor Status Codes
4.0 Definitions
4.1 Status Code Descriptions
4.2 Status Code Table
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4.3
4.4
5
Startup Codes
Status Code Troubleshooting
4.4.1
Normal - Off
4.4.2
Normal - Running
4.4.3
Demand Cooling Injecting
4.4.4
Low Suction Pressure
4.4.5
Low Oil Pressure
4.4.6
Motor Protection Trip
4.4.7
Welded Contactor
4.4.8
Low Supply Voltage
4.4.9
Module Failure
4.4.10 Discharge Pressure
4.4.11 Discharge Temperature
4.4.12 Loss of Communication
4.4.13 Disabled by Rack Controller
4.4.14 Phase Loss
4.4.15 No 3-Phase Power
4.4.16 No Code
4.4.17 Unknown Code
Maintenance Procedures for Intelligent Store™ Discus® Compressors
5.1 Demand Cooling Service Procedures
5.1.1
Manually Triggering Injection
5.1.2
Temperature Probe Inspection
5.1.3
Coil Inspection and Replacement (2D / 3D)
5.1.4
Coil Inspection and Replacement (4D)
5.1.5
Injection Valve Replacement (2D/3D)
5.2 Compressor Replacement (2D / 3D)
5.2.1
Removal of the Compressor
5.2.2
Installation of the Compressor (2D / 3D)
5.3 Module Replacement for 2D / 3D
5.4 Service Procedures for the 4D Compressor
5.4.1
Compressor Replacement
5.4.2
Suggested Procedure for Replacement of the Module (4D)
5.4.3
Suggested Procedures for Conducting a Head Inspection
5.5 Serial Number Change after Compressor Replacement
5.6 Replacement Module Information
5.6.1
Determine the Replacement Module Part Number
5.6.2
Power-up Instructions for the New Module
5.7 Event Counters - Service Procedures
5.8 Pressure Switch Replacement
5.9 “Hi-Pot” Testing
5.10 Lifting Instructions
Appendix
A Wiring
A.1 Module Wiring
A.2 Fusing
A.3 Communication Wiring
B Demand Cooling Temperature Comparison
C Parts List
D Reference Drawings
E Technical Support
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1. Overview of Emerson Climate
Technologies Intelligent Store™
Discus® Compressor
The Intelligent Store™ Discus® product line is now
available on 2D, 3D and 4D compressors and
integrates a number of important sensing and
compressor protection functions. This product
provides a Network Communications Interface (NCI)
for on/off control of the compressor, capacity modulation and for communication of compressor status to
the Computer Process Controls™ (CPC) E2 rack
controller. Protection against low oil pressure, excessive discharge temperature, high discharge pressure
and low suction pressure is standard on every
Intelligent Store™ Discus® compressor. A prominent
7-segment display on the front of the Intelligent
Store™ Discus® compressor indicates at a glance the
operational status of the compressor.
Note: Throughout this manual the term “module”
refers to the electronic control box of the Intelligent
Store™ Discus® compressor.
1.1
Functionality
1.1.1 Diagnostics
The Intelligent Store™ Discus® compressor continually displays a code indicating the compressor status.
Normal conditions such as “On”, “Off”, “Injecting
Liquid” and “Low Suction Pressure” are displayed with
a steady code. Indications of fault conditions (e.g.,
low oil pressure, high discharge pressure, etc.) are
displayed with a flashing code. The status codes in
figure 1.0 are discussed thoroughly in this manual,
along with troubleshooting charts to help diagnose
root causes.
These status codes may also be viewed directly on
the E2 controller window, remotely through
UltraSite™ or other remote monitoring software available from CPC (Computer Process Controls™).
Figure 1.0 Intelligent Store Discus Status Code Table
1.1.2 Communications
Communication between the rack controller and each
Intelligent Store™ Discus® is through an NCI485 network with an RS485 electrical interface and jumper
termination. The two-wire communication cable is
daisy-chained from one compressor to the next on
each rack.
Compressor operations such as on/off control,
modulation operation, transmission of compressor
status and run proofing are all accomplished through
the communication network. Password protected
remote reset of certain compressor lockouts may also
be done through the communication network if this
functionality has been enabled in the controller.
The E2 may be configured to send alarms for
different levels of compressor faults, such as for
“lockouts” or for “trips”.
The “Failsafe” mode may be configured to turn the
compressor on or off in the event of a communications failure. This configuration is accomplished
through the E2 control panel (reference section 3.7).
1.1.3 Fault History
The most recent compressor trips and lockouts may
be observed through the E2 control panel, UltraSite™
or other remote monitoring software. A time-date
stamp on each fault enables correlation of compressor faults to system events. A running tally of lockouts
and run cycles is accessible through the E2.
Graphing of compressor history (such as run cycles,
injection cycles or system conditions) and fault condi5
AE8-1337 R1
tions can be a powerful tool for diagnosing system
problems.
The fault history and the record of run cycles
maintained in the Intelligent Store™ Discus® memory
cannot be re-set. If a compressor is replaced, the E2
notebook feature (see section 5.7 of this manual)
should be used to maintain a record of faults at the
time of replacement (if the Intelligent Store™ Discus®
front box is transferred to the new compressor). This
record will make it easier to determine which faults
belong to the new compressor, and which ones
belong to the old compressor.
Oil pressure lockout and discharge temperature
lockout may be reset through the E2 or remotely
through UltraSite™. The oil pressure lockout reset
feature is password protected.
Service contractor and end user policies need to be
considered when deciding whether to enable or
disable the oil pressure remote reset feature. The
default condition is to “disable” this feature.
Refer to section 3.8 for enabling or disabling remote
reset.
1.2
Features
1.2.3 Failsafe Operation
1.2.1
Compressor Protection
The “Failsafe” mode may be configured (through the
E2 during commissioning) to turn the compressor on
or off in the event of a communications failure. The
Intelligent Store™ Discus® will revert to the failsafe
setting (to either RUN or to remain OFF) when
communications are lost for 5 or more minutes.
Compressor protection may be in the form of a TRIP,
where the compressor will be shut off until the fault
condition no longer exists, or a LOCKOUT. A LOCKOUT is a condition whereby the compressor will
remain off until the fault condition no longer exists
AND the manual reset button is pushed. Oil pressure
and discharge temperature lockouts may also be
reset remotely through UltraSite™ if this password
protected feature is enabled. Refer to sections 4.0
and 5.0 of this bulletin for more detailed information
regarding compressor operation and interpretation of
status codes.
The following compressor protection features are
provided on all Intelligent Store™ Discus® compressors:
•
•
•
•
•
•
•
•
•
•
High discharge pressure
Low suction pressure
Discharge temperature
Line-break motor protection (2D/3D)
Motor temperature protection (Intelligent
Store™ Discus® replaces the solid-state
module used on 4D compressors)
Low voltage
Power interrupt motor protection
Welded contactor protection
Loss of phase motor protection
Low oil pressure (Intelligent Store™ Discus®
replaces the Copeland® brand Sentronic+™
oil pressure protection module)
The following options are available on Intelligent
Store™ Discus® compressors:
•
•
•
Liquid injection for discharge temperature
control (Intelligent Store™ Discus® replaces
the Demand Cooling module on HCFC-22 low
temp models)
Crank case heater
Capacity modulation
The default setting for all Intelligent Store™ Discus®
compressors leaving the Emerson Climate
Technologies, Inc. factory is “ON”. If the rack has not
been commissioned, system charging may be accomplished by supplying pilot circuit power to the
Intelligent Store™ Discus® compressor with the E2
OFF. After 5 minutes the Intelligent Store™ Discus®
will send a run command to the contactors.
Compressors with power to the contactors will then
RUN with fully enabled protection features (e.g.,
suction and discharge pressure, discharge temperature, motor protection).
During the commissioning process decisions should
be made regarding which compressors should run
and which ones should not when communication has
been lost.
1.2.4 Welded Contactor Protection
Voltage is sensed at the motor terminals of the
Intelligent Store™ Discus® compressor. If voltage is
present after the contactor has been signaled to
“open”, the module will send a welded contactor alarm
to the E2. The E2 then issues a run command to the
module to load the contactor, bringing all three legs of
the power supply back on line. This prevents a singlephase motor burn. The compressor will run continuously until the unit is manually shut down. Safety
devices (pressure switches and motor protection) will
override this feature.
This is not to be confused with single-phase protection at start-up or while running. In that case, the
contactor will be instructed to “open”, shutting down
the compressor.
1.2.2 Remote Reset
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2.
2.2
Installation Instructions
Emerson Climate Technologies, Inc. requires that all
customers review the recommended guidelines in the
published Application Engineering Bulletins, and
ensure that best engineering practices are followed in
the use of Copeland® brand compressors. Emerson
Climate Technologies, Inc. Application Engineering
Bulletins can be found on our website,
EmersonClimate.com under the section titled “Online
Product Information”. The advice and conclusion by
Emerson Climate Technologies, Inc. represents our
best judgment under the circumstances, but such
advice given and/or conclusion made, or results
obtained shall be deemed used at your sole risk.
2.1
Terminal Box Connections
Feature
Electrical
Requirements
Intelligent Store™ Discus®
Supply Voltage
(Module Power)
208/230 volts
170 volts min
Pilot Circuit Voltage
(Contactor Output)
208/230 volts
170 volts min (supplied by
Intelligent Store™ Discus®)
Crankcase Heater
208/230 Volts
Compressor Motor
Model Dependent
Variable Speed
Compatibility
Not Compatible with
Variable Speed
Head Fan
Per OEM Wiring
Mounting and Installation
The Intelligent Store™ Discus® compressor is
designed and engineered for use in a supermarket
rack application. Its environmental restrictions are no
different than other Copeland® brand Discus® compressors. As such, the compressor must be in an
equipment room, rack house or roof enclosure to prevent direct precipitation on the compressor.
The following terminal box connections must be made
by the original equipment manufacturer:
•
The following clearance provisions must be
considered when designing the rack for use with an
Intelligent Store™ Discus® compressor:
•
•
•
•
•
Removal of the Intelligent Store™ Discus®
front cover for access to the RS485 communications network connection.
Removal of the Intelligent Store™ Discus®
front box for service reasons.
Opening of the side enclosure (2D / 3D
compressors) for service and for communications cable routing.
Removal of the terminal box and harness
shroud (4D compressors) for service and
communications cable routing.
•
•
Module Power - 230 VAC to power the
Intelligent Store™ Discus® electronics, accessories (e.g., unloader coils or injection valves)
and contactor coil.
Contactor - Output connections to the contactor coil.
Crankcase Heater - 230 VAC power for the
crankcase heater, such as from the auxiliary
contact on the compressor contactor. Leave
connectors empty when crankcase heaters
are not included.
Intelligent Store™ Discus® and Discus® compressors use the same motor terminal connections.
All terminal box connections are to be made with AMP
P/N 2-520183-2 or equivalent. Refer to figure 2.1.
Refer to Emerson Climate Technologies, Inc. customer drawings in Appendix D for dimensional
envelopes of Intelligent Store™ Discus® compressors.
Figure 2.1 3D Terminal Box Assembly
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2.2.1 Current Relay Connections
•
2D and 3D compressors have a current relay in
the terminal box (refer to figure 2.1 above). The
current relay is used to detect an open motor
protector. Route one motor power lead through
the relay as in figure 2.2. Note: 2D TFD and TFE
compressors 6 HP or smaller should pass the
power lead twice through the coil. The minimum
amp draw that the relay can properly sense is 5.5
amps.
Figure 2.3 4D Fan Installation
Figure 2.2 Current Relay Wiring
2.2.2 Fan Connections
•
Intelligent Store™ Discus® compressors are not
shipped from the Emerson Climate Technologies,
Inc. factory with fans installed. OEM installation of
fans should follow established regulatory, OEM
engineering and end user specifications regarding
wiring. An optional terminal box fan fuse is available for protection in the event of an electrical
short condition (P/N 929-0054-00). Refer to figure
2.5 for a picture of this assembly.
•
Head fan requirements for Intelligent Store™
Discus® compressors are identical to other
Discus® compressors. Refer to AE bulletin
4-1135.
Figure 2.4 3D Fan Installation
Figure 2.5 Fan Fuse Assembly
•
Refer to figures 2.3 and 2.4 for fan installation.
2.3
Controller Requirements
The controller must be an E2 that has been equipped
with a CPC Intelligent Store™ Discus® Network
Interface Board (CPC part number 637-4890). The
controller firmware must be revision level 2.07 or
higher. However, revision level 2.21 or higher is recommended to ease commissioning.
Refer to CPC E2 RX Refrigeration Controller manual
026-1610 for detailed information regarding the
Intelligent Store™ Discus® compatible rack controller.
2.4
Communications Network
The Intelligent Store™ Discus® and E2 rack controller
communicate with each other over an NCI-485
(Network Communications Interface) distributed
control network. This data communications protocol is
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designed for commercial HVAC and Refrigeration
applications. RS-485 hardware connections are used
at the network terminations and at each node
(compressor).
The Intelligent Store™ Discus® communication cable
terminates in the E2 Controller on the Network
Interface Board, and is routed to each of the
compressors in a daisy-chain format. Refer to figure
2.6 and figure 2.8.
Figure 2.8 Two Rack Daisy-Chain
One E2 controller can control 4 suction groups, with
up to 16 stages in each suction group. A compressor
with no unloader is one stage. A compressor with an
unloader would be counted as two stages.
2.5
Figure 2.6 RS-485 Daisy-Chain Configuration
One E2 controller can control two racks. Two RS485
connections are available on the Network Interface
Board for two parallel daisy-chain arrangements.
Refer to figure 2.7 for a photo of the Intelligent Store™
Discus® Network Interface Board.
Network Terminations and Cable
Routing
Each network node has 3 jumpers that must be
positioned to define whether or not the node is in the
middle or end of the daisy-chain. The last compressor
in the daisy-chain is “terminated” and the jumpers
must be set accordingly. The E2 jumpers on the
Network Interface Board are always set for “terminated” (refer to figure 2.11).
Refer to figure 2.10 for the location of the communications board in the Intelligent Store™ Discus® module.
The communications wire to the compressor may be
routed through the rear of the side box (2D / 3D) or
through the rear of the terminal box in the 4D
compressor. Routing slots are also available on the
bottom of the front box. Consider protection of the
wiring from accidental pull-out when selecting the
routing option. From this perspective, using the
bottom of the front box may be an undesirable option.
If the bottom of the front box is used, a strain relief is
available and should be used as shown in figure 2.9.
Figure 2.7 Intelligent Store™ Discus® Network
Interface Board
Figure 2.9 Strain Relief for Communication Cable Alternate Routing
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Grommets are included to minimize the chance of
chaffing where the cable passes through sheet metal
openings.
Refer to figure 2.11 for details regarding the communication board jumper positions.
Important! Note that RS485 is polarity sensitive.
“Pos” wires must connect to other “Pos” terminals,
and “Neg” wires must connect to other “Neg” terminals. The shield wire is connected to the center
terminal, or “0 volt” position. Refer to section 4.4.12
for voltage specifications.
2.5.1 Wiring Types
A shielded, twisted pair cable such as Belden #8641
(24 AWG) or Belden #8761 (22AWG) should be used
for the communication wiring.
2.6 Intelligent Store™ Discus® Service
Manual
Refer to sections 3, 4, and 5 of this document for
detailed commissioning, service and troubleshooting
instructions.
2.7 Compatibility of Service Compressors
The following S/Ns may be used to determine
whether service compressors are compatible with
Intelligent Store™ Discus® hardware and accessories.
2D built on or after
3D built on or after
4D built on or after
S/N 04D
S/N 04D
S/N 05D
2.8 Intelligent Store™ Discus® Model
Numbers
RS485 Connector in Intelligent
Store™ Discus® Front Box
Jumpers (3) for
Termination Definition
2D, 3D, and 4D Discus® compressors with a -600
series S/E (the last 3 digits of the model) are
equipped from the factory with Intelligent Store™
Discus® hardware and accessories.
Figure 2.10 Intelligent Store™ Discus®
Communications Board
Figure 2.12 Intelligent Store™ Discus® Model
Number
The number defines service valve configuration as
well as accessory content such as crankcase heaters,
liquid injection and modulation.
Figure 2.11 Communications Wiring and Jumper
Position
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3. Intelligent Store™ Discus®
Commissioning Procedure
Important Note: The following commissioning
instructions (sections 3.0 through 3.9) pertain to
E2 controllers with version 2.21 or later firmware.
If you have an earlier version of firmware we
recommend that you upgrade to the latest version
available. For commissioning instructions
pertaining to E2 controllers with firmware
revisions of 2.07 through 2.20 refer to sections
3.10 through 3.20 of this document.
To determine the firmware revision level in the E2
follow these steps:
1. From the main menu select
Configuration).
2. Press 3 (System Information).
3. Press 4 (Firmware Revision).
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(System
The E2 should look like figure 3.0 below:
Each Intelligent Store™ Discus® Compressor module
is connected to the E2 via the RS-485 communications network. As with other devices, the module must
first be “commissioned” to establish communications
with the rack controller. During this commissioning
process the E2 will designate a specific subnet and
node address for each module (front control box) that
is connected. It will also upload and store a master
record of the model number, serial number, and
programmable settings from each module. Warning:
E2 programs from a previously commissioned
store should not be transferred to the new E2 to
short-cut the commissioning process.
The commissioning process can be broken down into
the following steps:
1. Network Setup
2. Node Recovery
3. Suction Group Setup
a. Suction Group Associations
b. Compressor Run Proofing
4. ISD Setup
a. Compressor Naming
b. Failsafe Operation
c. Remote Reset
There are two main menus that must be accessed to
perform module commissioning. These are the
Network Setup screen and the ISD Compressor
Setup screen. To access these screens, refer to
figures 3.1 and 3.2 on the following page:
Figure 3.0 Firmware Revision Screen
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Figure 3.1 Network Setup Screen Navigation (Key Sequence 7-7-2)
Figure 3.2 ISD Compressor Setup Screen Navigation (Key Sequence 5-35)
3.0 Network Setup
Begin the process by logging on. To do this press the
Log In/Out button on the E2. When prompted, enter
“USER” in the username field and “PASS” in the password field. To access the menu shown in figure 3.1:
1.
2.
3.
4.
Press
Press
Press
Press
menu to open the Main Menu.
7 (System Configuration).
7 (Network Setup).
2 (Connected I/O boards and controllers).
The Intelligent Store™ Discus® devices are listed
under the heading ECT Devices. Use the down arrow
key to highlight the cell next to the ISD-1.0 control.
Enter the number of Intelligent Store™ Discus® compressors that are connected to this E2 (refer to figure
3.3).
3.1 Node Recovery
To begin the node recovery process, proceed as
follows:
1. Access the Controller Setup screen (this can be
done by pressing the “back” button from the
Connected I/O Boards and Controllers screen or
from the main menu by pressing 7 (System
Configuration) followed by 7 (Network Setup)
followed by 3 (Controller Setup).
2. Once the Controller Setup screen has been
accessed it should appear as shown in figure 3.4.
(Note: ISD devices will not be displayed on this
screen unless they have been listed on the
Connected I/O boards and controllers screen as
described in section 3.0 Network Setup)
Figure 3.3 Connected I/O Boards and Controllers
Screen
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Figure 3.4 Controller Setup Screen
Figure 3.5 Controller Setup Screen (Following Node
Recovery)
3. Verify that the number of ISD devices listed on the
Controller Setup Screen matches the number of
devices connected to the E2.
6. Once the first ISD device has been successfully
commissioned, turn it OFF.
At this point you must choose how you want the ISD
devices to be displayed in the E2. To avoid confusion,
it is recommended that the devices be displayed in
the same order that they are located on the rack. This
involves commissioning each device individually. To
follow this procedure, continue with step 4 below:
7. Continue the process by turning ON only the
second ISD device on the rack. Use the arrow key
to highlight the second ISD device listed on the
controller setup screen. Press F4: Set Address to
bring up the node recovery screen. Enter 1 for the
number of nodes to be recovered.
4. For this process to work properly the E2 must
communicate with one ISD device at a time. To
begin, turn ON only the first ISD device on the
rack. Be sure to allow enough time for the ISD to
perform its self diagnostics before proceeding
(approximately 30 seconds).
8. Continue this process by turning OFF the second
device and turning ON the third…repeat until all
ISD devices have been commissioned. It is important that only one device be powered at a time and
that 1 is entered for the number of nodes to be
recovered.
5. Use the arrow key to highlight the first ISD device
listed on the controller setup screen. Press F4:
Set Address to bring up the node recovery screen.
Enter 1 for the number of nodes to be recovered.
3.2 Suction Group Setup
After communications have been established with a
module, the E2 screen will update and list the device
as Node Found. Following the node recovery
process, the Controller Setup Screen should look like
figure 3.5. Note: You must refresh the screen by backing out and returning for the compressor serial number to be displayed.
13
In order for the E2 to control compressor operation
the proper input and output values must be entered
into the system. This is accomplished by creating a
suction group application in the rack controller.
Programming of the suction group will depend upon
the system as well as the options desired by the end
user. The following section covers the steps necessary to setup the sample rack shown in figure 3.9.
From the Main Menu:
1. Press 6 (Add / Delete Application).
2. Press 1 (Add Application).
3. Press F4 (Lookup) and select Suction Group from
the option list.
4. Enter the number of suction groups controlled by
this E2.
5. When prompted by the E2 to edit the application,
Press Y for yes.
AE8-1337 R1
This will open the suction group setup screen as
shown below in figure 3.6:
account for two stages. A compressor without an
unloader will count as one stage.
To continue the suction group setup process:
1. Press F2 (Next Tab) until the Comp Setup screen
is displayed.
2. Under Type, select Comp for compressor or Unld
for unloader.
3. Under HP/Amps enter the compressor horsepower for each stage.
4. If run proofing is desired, select Yes under Proof.
Figure 3.6 Suction Group Setup Screen
From this screen you can edit the name of the suction
group, select the control type, and enter the number
of stages. The number of stages can be determined
as follows. A compressor with an unloader will
Note: For a compressor equipped with an unloader
the horsepower should be divided between the
compressor and unloader stages. A compressor with
an unloader can be considered to be two different
compressors from a control standpoint. When the
suction group status screen shows the unloader to be
“off” and the comp (compressor) to be “on”, the
compressor is running “unloaded”, i.e. the unloaded
portion of the compressor is not contributing to generation of capacity (this is confusing since the unloader
solenoid in this case is actually “on”). If the comp and
unloader are both “on”, the compressor is running at
full capacity.
Sample Rack with Intelligent Store™ Discus® Compressors
- 25° Suction
- 15° Suction
4DL3A150L-TSK
04I35625R
3DRHA100E-TFD
04I00300R
4DS3A220E-TSK
04I35631R
3DRHA100E-TFD
04I00439R
Address
Subnet: 15
Node: 2
Subnet: 15
Node: 5
Subnet: 15
Node: 4
Subnet: 15
Node: 3
Subnet: 15
Node: 1
Compressor
Name
RACK1COMP1
RACK1COMP2
RACK1COMP3
RACK2COMP1
RACK2COMP2
Comp1
Comp2
Comp3
(unloader)
Comp4
Comp5
(unloader)
Comp1
Comp2
(unloader)
Comp3
Stages
2DC3-050E-TFD
04I00435R
Figure 3.7 Suction Group Setup Screen (Comp Setup)
14
AE8-1337 R1
When these steps have been completed, the
compressor setup screen should look like figure 3.7
below:
3.3 Configuring Associations
The next step links the ISD devices to the appropriate
compressor/stage in the suction group. Access the
association screen from the main menu by pressing 7
(System Configuration) followed by 7 (Network Setup)
followed by 7 (ISD Associations). Once this has been
done the screen should look like figure 3.8 below:
Figure 3.10 Completed ISD Associations Screen
Note: Immediately following the commissioning
process the module may display a status code 1
despite the fact that the compressor is not running.
Once the suction group setup procedure is completed
and a run command is sent to the module, the display
will correspond to the status of the compressor.
3.4 Compressor Naming
Figure 3.8 ISD Associations Screen
Using the F4 lookup button, enter the appropriate
suction group for each ISD device. Then, enter the
appropriate stage number for each ISD device. Note
that each compressor is considered as one stage. If
an unloader is present it is considered one stage.
Refer to the sample rack in figure 3.9 along with the
completed ISD Association Screen shown in figure
3.10.
- 25° Suction
To rename the modules, access the ISD Compressor
Setup Screen:
1. Press menu to open the Main Menu.
2. Press 5 (Configured Applications).
3. Press 35 (ISD Compressor).
- 15° Suction
4DL3A150L-TSK
04I35625R
3DRHA100E-TFD
04I00300R
4DS3A220E-TSK
04I35631R
3DRHA100E-TFD
04I00439R
Address
Subnet: 15
Node: 2
Subnet: 15
Node: 5
Subnet: 15
Node: 4
Subnet: 15
Node: 3
Subnet: 15
Node: 1
Compressor
Name
RACK1COMP1
RACK1COMP2
RACK1COMP3
RACK2COMP1
RACK2COMP2
Comp1
Comp2
Comp3
(unloader)
Comp4
Comp5
(unloader)
Comp1
Comp2
(unloader)
Comp3
Stages
During the commissioning process each module is
assigned a node address based upon the order in
which it is found by the E2. The E2 then assigns the
module a name based on the node address. It is often
convenient to change this name to reflect the suction
group and position in the rack for each module. Begin
this process by making a list of each compressor as
well as the suction group and location in the rack.
2DC3-050E-TFD
04I00435R
Figure 3.9 Sample Rack with Intelligent Store™
Discus® Compressors
15
AE8-1337 R1
4. Highlight the appropriate suction group and press
F5 (Setup).
5. Press F2 (Next Tab) until the Comp Setup tab is
highlighted.
6. Select Yes under the Proof column.
7. Press F2 (Next Tab) until the More tab is highlighted. Once the More tab has been selected, the
display should look like figure 3.13.
8. Press F3 (Edit).
9. Press 1 (Alternate I/O Formats).
10. Press 2 to select the Controller / Application /
Property format.
Figure 3.11 ISD Summary Screen
Select the compressor that you wish to rename and
Press F5 (Setup). The ISD Compressor Setup Screen
should be displayed as shown in figure 3.12. Key in
the desired text for the new module name. Additional
information for this compressor may be entered in the
category for Long Name.
The ISD module has built in proofing detection, so it
is considered the controller for this function. Using
the F4: Lookup key, select the appropriate ISD module under controller, the appropriate ISD module
under application, and COMP RUN PROOF under
output.
Note: The COMP RUN PROOF selection will not be
displayed on the Suction Group Setup screen unless
proofing has been enabled by selecting Yes under the
Proof column on the Comp Setup tab.
Figure 3.13 Suction Group Setup Screen
(Proof Setup)
Figure 3.12 ISD Setup Screen (General)
3.5 Proofing
3.6 Welded Contactor
Proofing verifies that the compressor is turning ON
and OFF as commanded by the E2 rack controller.
This is accomplished by comparing the run command
status from the E2 with the built in proof checking output of the module. In the event that a compressor fails
proofing, the E2 can call on another compressor to
satisfy demand. To enable proofing, follow these
steps:
E2 controllers loaded with version 2.21 and later
firmware no longer require special instructions for
welded contactor setup. These associations are
performed automatically by the E2 when the steps in
section 3.3 (Configuring Associations) are performed.
1. Press menu to open the Main Menu.
2. Press 5 (Configured Applications).
3. Press 1 (Suction Groups).
3.7 Failsafe Operation
As with other devices controlled by the E2, each
module may be programmed to operate independently in the event that communications are lost. The
normal modes of operation are compressor ON or
16
AE8-1337 R1
compressor OFF. In the case where the module is set
for failsafe OFF the compressor will not run until
communications have been re-established with the
E2. In the case where the module is set for failsafe
ON, the compressor will continue to run until communications have been re-established with the E2. In this
case all compressor protection provided by the module will still function as needed.
The screen should look like figure 3.15 below.
Change the selection next to Oil Lock Reset to
“Enabled”. Repeat these steps for each module.
Each module is sent from the Emerson Climate
Technologies, Inc. factory with the failsafe set “ON”.
To check this setting or to program the module for failsafe OFF, follow these steps:
1. Starting at the main menu, press 5 (Configured
Applications) then 35 (ISD Compressor).
2. Select the desired ISD device and press F5:
Setup. The following screen should be displayed:
Figure 3.15 ISD Setup Screen (Alarms)
3.9 ISD Module Status
To serve as a convenient and quick reference, the E2
will display information about each ISD module. To
access this screen follow these steps:
1. Starting at the main menu, press 5 (Configured
Applications).
2. Press 35 (ISD Compressor).
3. Select the desired ISD device and press Enter.
The display should look like figure 3.16 below.
Figure 3.14 ISD Setup Screen (General)
3. Select Compressor On or Compressor Off
depending on the desired failsafe.
4. Repeat this for each ISD module.
3.8 Remote Reset
In the event of an oil pressure or discharge temperature lockout a manual reset is required to restart the
compressor. This can be accomplished by pressing
the reset button on the front of the Intelligent Store™
Discus® module or by remotely resetting the module
through the CPC UltraSite™ monitoring software
program. To enable this remote reset option, access
the ISD Compressor Setup Screen by following these
steps:
1.
2.
3.
4.
Press
Press
Press
Press
menu to open the Main Menu.
5 (Configured Applications).
35 (ISD Compressor).
F2 (Next Tab) to access the Alarm Tab.
17
Figure 3.16 ISD Status Screen
AE8-1337 R1
3.10 Intelligent Store™ Discus®
Commissioning Procedure for E2
Firmware Revisions 2.07 through 2.20
Each Intelligent Store™ Discus® Compressor module
(referred to as “CST” in the E2) is connected to the E2
via the RS-485 communications network. As with
other devices, the module must first be “commissioned” to establish communications with the rack
controller. During this commissioning process the E2
will designate a specific subnet and node address for
each module (front control box) that is connected. It
will also upload and store a master record of the
model number, serial number, and programmable settings from each module.
Warning: E2 programs from a previously commissioned store should not be transferred to the new
E2 to short-cut the commissioning process.
The commissioning process can be broken down into
the following steps:
1. Node Recovery
2. Configuring Applications
a. Module Renaming
b. Suction Pressure Mapping
c. Setting Failsafe Mode
3. Suction Group Setup
a. Suction Group Associations
b. Welded Contactor Setup
c. Compressor Run Proofing
There are two main menus that must be accessed to
perform module commissioning. These are the CST
Network Status screen and the CST Setup screen. To
access these screens, refer to figures 3.17 and 3.18
below:
Figure 3.17 CST Network Status screen navigation (Key sequence 7-7-1)
Figure 3.18 CST Setup screen navigation (Key sequence 5-35)
18
AE8-1337 R1
Begin the process by logging on. To do this press the
Log In/Out button on the E2. When prompted, enter
“USER” in the username field and “PASS” in the password field. To access the screens shown in
figures 3.17 and 3.18:
1.
2.
3.
4.
5.
Press
Press
Press
Press
Press
menu to open the Main Menu.
7 (System Configuration).
7 (Network Setup).
1 (Online Status).
F1 (CST Status).
After communications have been established with a
module, the E2 screen will update and list the device
as Node Found. Because this process establishes
communications with each device individually, it may
take several minutes depending on the number of
modules present.
3.12 Optional Commissioning Procedures
Option 2: Another procedure is to work with one rack
at a time. To do this, turn the power on to the units that
are on the first rack, leaving the other rack “off”. For
the number of nodes, enter the number of
compressors that are connected to the E2 and have
power. When it is time to recover the nodes of the
second rack, turn off power to the first rack and
energize the second rack. Enter the number of
compressors that are on the 2nd rack that are
communicating to the E2.
Figure 3.19 CST Network Screen (Prior to Node
Recovery)
If modules have previously been commissioned they
will be listed on the CST Network Screen. If you are
repairing or replacing an existing module, please refer
to section 5 of this document. If no modules have
been commissioned, the screen should look like
figure 3.19 above.
3.11 Node Recovery
Option 3: During the previous node recovery process
options, modules were randomly assigned a node
address as they were found by the E2 on the
communications network. This resulted in randomization of the compressor order as they were located and
shown on the CST network screen (figure 3.4).
Option 3 may be used to identify the nodes in the
order that the compressors are located, left to
right. Option 3 does take more time (node recovery
takes approximately 1 1/2 minutes per compressor).
Begin the node recovery process by powering up only
the first compressor on the rack. For the number of
nodes enter “1”. After node number 1 is found, turn off
the power to compressor number 1 and power up only
the second compressor on the rack. Repeat the node
recovery process by entering “1” for the number of
nodes. Continue until all devices have been assigned
a node number—one compressor on at a time, one
node to recover at a time.
3.13 Configuring Applications
To begin the node recovery process, proceed as
follows:
1. Press F4 (Node Recovery).
2. You will be prompted to enter the number of nodes
to recover. Proceed by entering the number of
compressors that are connected to this rack
controller. They must all be powered up and connected to the E2 via the RS485 network. There
are two other options that can be followed regarding this node recovery process. Refer to Optional
Commissioning Procedures below for additional
information.
3. Press Enter to begin the node recovery process.
The nodes will be found in random order.
19
Once all of the communicating devices have been
found, the E2 will return to the CST Network Screen
to show a summary of the commissioning results
(refer to figure 3.20 below). Check the list to be sure
that all modules are present. If any are missing, refer
to sections 4.4.2 and A.3 to troubleshoot communications issues.
AE8-1337 R1
To rename the modules, access the CST Setup
Screen:
1. Press menu to open the Main Menu.
2. Press 5 (Configured Applications).
3. Press 35 (CST Compressors).
Figure 3.20 CST Network Screen (with modules
present)
- 25° Suction
- 15° Suction
4DL3A150L-TSK
04I35625R
3DRHA100E-TFD
04I00300R
4DS3A220E-TSK
04I35631R
3DRHA100E-TFD
04I00439R
Address
Subnet: 15
Node: 2
Subnet: 15
Node: 5
Subnet: 15
Node: 4
Subnet: 15
Node: 3
Subnet: 15
Node: 1
Compressor
Name
RACK1COMP1
RACK1COMP2
RACK1COMP3
RACK2COMP1
RACK2COMP2
Comp1
Comp2
Comp3
(unloader)
Comp4
Comp5
(unloader)
Comp1
Comp2
(unloader)
Comp3
Stages
Figure 3.22 CST Summary Screen
2DC3-050E-TFD
04I00435R
Select the compressor that you wish to rename and
Press F5 (Setup). The CST Setup Screen should be
displayed as shown in figure 3.23. Key in the desired
text for the new module name. Additional information
for this compressor may be entered in the category for
Long Name.
Figure 3.21 Sample Rack with Intelligent Store™
Discus® Compressors
Note: Immediately following the commissioning
process the module may display a status code 1
despite the fact that the compressor is not running.
Once the suction group setup procedure is completed
and a run command is sent to the module, the
display will correspond to the status of the compressor.
3.14 Compressor Naming
During the commissioning process each module is
randomly assigned a node address (if option 1 or
option 2 are used during the node recovery
process) based upon the order in which they are
found by the E2. The E2 then assigns the module a
name based on the subnet and node address. It is
often convenient to change this name to reflect the
suction group and position in the rack for each
module. Begin this process by making a list of each
compressor as well as the suction group and location
in the rack.
Figure 3.23 CST Setup Screen
20
AE8-1337 R1
Sample Rack with
Intelligent Store™ Discus® Compressors
- 25° Suction
3. Enter the Board : Point information for the
suction pressure transducer. This information can
be found by locating the appropriate suction pressure transducer and determining its location on
the I/O board wired into the rack controller.
- 15° Suction
4DL3A150L-TSK
04I35625R
3DRHA100E-TFD
04I00300R
4DS3A220E-TSK
04I35631R
3DRHA100E-TFD
04I00439R
Address
Subnet: 15
Node: 2
Subnet: 15
Node: 5
Subnet: 15
Node: 4
Subnet: 15
Node: 3
Subnet: 15
Node: 1
Compressor
Name
RACK1COMP1
RACK1COMP2
RACK1COMP3
RACK2COMP1
RACK2COMP2
Comp1
Comp2
Comp3
(unloader)
Comp4
Comp5
(unloader)
Comp1
Comp2
(unloader)
Comp3
Stages
2DC3-050E-TFD
04I00435R
Figure 3.25 CST Setup Screen (Input Tab)
4. Repeat this process for each module.
Once mapping has been completed, the suction
group’s pressure will be displayed on the CST Comp
Status Screen as shown in figure 3.26.
Figure 3.24 CST Summary Screen (After Renaming)
3.15 Suction Pressure Mapping
To serve as a convenient and quick reference, the
suction pressure value of the whole suction group
may be displayed on each individual CST Status
Screen. For this value to be displayed it must first be
mapped in the E2 by following these steps:
1. From the CST Setup Screen shown in figure 3.7,
Press F2 (Next Tab) to access the Input Tab.
2. Use the down arrow key to highlight the cell next
to Suction Pres In.
21
Figure 3.26 CST Comp Status Screen
AE8-1337 R1
3.16 Remote Reset
In the event of an oil pressure or discharge temperature lockout a manual reset is required to restart the
compressor. This can be accomplished by pressing
the reset button on the front of the Intelligent Store™
Discus® module or by remotely resetting the module
through the CPC UltraSite™ monitoring software
program. In order to enable this remote reset option,
follow these steps:
1. From the CST Setup Screen shown in figure 3.23,
press F2 (Next Tab) until the More tab is highlighted.
2. Press F4 (Look Up) to change the failsafe mode.
3. Repeat this process for each module.
1. From the CST Setup Screen shown in figure 3.23,
Press F2 (Next Tab) to access the Alarm Tab.
2. Change the selection next to Oil Lock Reset to
“Enabled”. The screen should look like figure 3.27
below.
3. Repeat this process for each module.
Figure 3.28 Failsafe Setup Screen
3.18 Suction Group Setup
In order for the E2 to control compressor operation
the proper input and output values must be entered
into the system. This is accomplished by creating a
suction group application in the rack controller.
Programming of the suction group will depend upon
the system as well as the options desired by the end
user. The following section covers the steps necessary to setup the sample rack shown in figure 3.21.
Figure 3.27 CST Setup Screen (Alarm Tab)
From the Main Menu:
3.17 Failsafe Operation
As with other devices controlled by the E2, each
module may be programmed to operate independently in the event that communications are lost. The
normal modes of operation are compressor ON or
compressor OFF. In the case where the module is set
for failsafe OFF the compressor will not run until
communication has been re-established with the E2.
In the case where the module is set for failsafe ON,
the compressor will continue to run until communication has been re-established with the E2. In this case
all compressor protection provided by the module will
still function as needed.
1. Press 6 (Add / Delete Application).
2. Press 1 (Add Application).
3. Press F4 (Lookup) and select Suction Group from
the option list.
4. Enter the number of suction groups controlled by
this E2.
5. When prompted by the E2 to edit the application,
Press Y for yes.
This will open the suction group setup screen as
shown on the next page in figure 3.29:
Each module is sent from the Emerson Climate
Technologies, Inc. factory with the failsafe set “ON”.
To check this setting or to program the module to failsafe OFF, follow these steps:
22
AE8-1337 R1
Note: For a compressor equipped with an unloader
the horsepower should be divided between the
compressor and unloader stages. A compressor with
an unloader can be considered to be two different
compressors from a control standpoint. When the
suction group status screen shows the unloader to be
“off” and the comp (compressor) to be “on”, the compressor is running “unloaded”, i.e. the unloaded portion of the compressor is not contributing to
generation of capacity (this is confusing since the
unloader solenoid in this case is actually “on”). If the
comp and unloader are both “on”, the compressor is
running at full capacity.
When the steps above have been completed, the
compressor setup screen should look like figure 3.30.
To continue the suction group setup process:
Figure 3.29 Suction Group Setup Screen
From this screen you can edit the name of the suction
group, select the control type, and enter the number
of stages. The number of stages can be determined
as follows:
A compressor with an unloader will count as two
stages. A compressor without an unloader will count
as one stage.
To continue the suction group setup process:
1. Press F2 (Next Tab) until the Comp Setup screen
is displayed.
2. Under Type, select Comp for compressor or Unld
for unloader.
3. Under HP/Amps enter the compressor horsepower for each stage.
4. If run proofing is desired, select Yes under Proof.
23
1. Press F2 (Next Tab) to go to the Comp Outs
screen.
2. Press F3 (Edit).
3. Press 1 (Alternate I/O Format).
4. Press 2 to change the I/O format from board/point
to controller/application/property.
5. Under Controller, use the F4 lookup function to
select the E2 rack controller.
6. Under Application, use the F4 lookup function to
select the appropriate compressor.
7. Under Property, use the F4 lookup function to
select Comp Run In.
Note: If the stage being mapped is an unloader,
select Unloader 1 In for Property.
AE8-1337 R1
Sample Rack with Intelligent Store™ Discus® Compressors
- 25° Suction
- 15° Suction
4DL3A150L-TSK
04I35625R
3DRHA100E-TFD
04I00300R
4DS3A220E-TSK
04I35631R
3DRHA100E-TFD
04I00439R
Address
Subnet: 15
Node: 2
Subnet: 15
Node: 5
Subnet: 15
Node: 4
Subnet: 15
Node: 3
Subnet: 15
Node: 1
Compressor
Name
RACK1COMP1
RACK1COMP2
RACK1COMP3
RACK2COMP1
RACK2COMP2
Comp1
Comp2
Comp3
(unloader)
Comp4
Comp5
(unloader)
Comp1
Comp2
(unloader)
Comp3
Stages
Note: “Comp Setup’ refers to the stage number not the
compressor number.
Figure 3.30 Suction Group Setup Screen (Comp Setup)
24
2DC3-050E-TFD
04I00435R
AE8-1337 R1
Sample Rack with Intelligent Store™ Discus®
Compressors
- 25° Suction
- 15° Suction
4DL3A150L-TSK
04I35625R
3DRHA100E-TFD
04I00300R
4DS3A220E-TSK
04I35631R
3DRHA100E-TFD
04I00439R
Address
Subnet: 15
Node: 2
Subnet: 15
Node: 5
Subnet: 15
Node: 4
Subnet: 15
Node: 3
Subnet: 15
Node: 1
Compressor
Name
RACK1COMP1
RACK1COMP2
RACK1COMP3
RACK2COMP1
RACK2COMP2
Comp1
Comp2
Comp3
(unloader)
Comp4
Comp5
(unloader)
Comp1
Comp2
(unloader)
Comp3
Stages
Once the Welded Contactor associations have been
made, the suction group setup screen should look like
figure 3.32 below:
2DC3-050E-TFD
04I00435R
Figure 3.32 Welded Contactor Setup Screen
3.20 Proofing
Proofing verifies that the compressor is turning ON
and OFF as commanded by the E2 rack controller.
This is accomplished by comparing the run command
status from the E2 with the built in proof checking
output of the module. In the event that a compressor
fails proofing, the E2 can call on another compressor
to satisfy demand. To enable proofing, follow these
steps:
Figure 3.31 Suction Group Setup Screen (Comp
Outs)
3.19 Welded Contactor
This protection feature is designed to prevent
damage to the motor in the event of a welded
contactor. Once a welded contactor is sensed by the
module, the rack controller will issue a command to
pull the contactor in and keep the compressor
running until it can be serviced. Refer to section 1.2.4
of this document for more detailed information on this
protection feature. To enable welded contactor
protection, follow these steps:
1. Press menu to open the Main Menu.
2. Press 1 (Suction Groups).
3. Highlight the appropriate suction group and press
F5 (Setup).
4. Press Cntrl + 0 to access the Additional Tabs
Menu.
5. Press J (Welded Contact).
6. Input the appropriate Controller / Application /
Property using F4 (Lookup).
25
1. Press menu to open the Main Menu.
2. Press 1 (Suction Groups).
3. Highlight the appropriate suction group and press
F5 (Setup).
4. Press F2 (Next Tab) until the Comp Setup tab is
highlighted.
5. Select Yes under the Proof column (see figure
3.33).
6. Press F2 (Next Tab) until the More tab is
highlighted.
Note: The COMP RUN PROOF selection will not be
displayed on the Suction Group Setup screen unless
proofing has been enabled by selecting Yes under the
Proof column on the Comp Setup tab.
AE8-1337 R1
4. Compressor Status Codes
The LED on the Intelligent Store™ Discus® front box
is designed to provide a rapid assessment of the
compressor’s operation condition. The LED codes
also provide some basic diagnostics to aid
troubleshooting of the system or compressor.
Figure 3.33 Suction Group Setup Screen
The E2 will default to a (Board / Point) application.
Before proofing can be programmed the E2 must be
changed to accept a (Controller / Application / Output)
format by following these steps:
1. With the cell next to CMP RUN PROOF highlighted, press F3 (Edit).
2. Press 1 to select Alternate I/O Formats.
3. Press 2 to select Controller / Application /
Property.
4. Input the appropriate Controller / Application /
Property using F4 (Lookup).
Once the proofing associations have been made, the
suction group setup screen should look like figure
3.34 below:
• Steady Code (not flashing): An indication of normal operation. There are no faults or issues with
the compressor.
• Flashing Code (a continuously flashing status
code): Refer to the status code table for interpretation of the fault.
• Flashing of Random Symbols: Occurs for 30 seconds after module power has been turned on. Also
occurs after “Reset” button is pushed. The
sequence of numbers will be an “8” followed by
the node and subnet address for the compressor.
This is normal, and is not an indication of fault.
4.0
Definitions
• Trip: The module has shut off the compressor due
to the fault condition. The compressor will be
available to run when the fault condition no longer
exists, and the minimum off time has been satisfied. The reset button does not need to be pushed
to clear a “Trip.” Pushing the reset button will not
clear the trip if the fault condition still exists.
• Lockout: The module has shut off the compressor
due to a fault condition. The compressor will NOT
be available to run when the fault condition has
been cleared until the reset button has been
pushed, or a remote reset has been activated.
4.1
Status Code Descriptions
Here is a brief description of each code that the
Intelligent Store™ Discus® can display, and what the
specific code means.
Steady
Figure 3.34 Run Proofing Setup Screen
Description
0
Normal - Off. The contactor is de-energized, and the rack controller has not
called for the compressor to run.
1
Normal - Running. The rack controller has
called for the compressor to run, and the
contactor is energized.
2
Normal - Demand Cooling Injecting. The
liquid injection valve has been activated.
• The Discharge Temperature Probe
senses a head temperature above the
injection cut-in temperature, and the
compressor is running.
26
AE8-1337 R1
• Under normal operating conditions the
code will switch between Injection
Mode (2) and Normal (1) when not
using demand cooling.
3
30 Second Reset - After initial power-up or
pressing the reset button, a 30 second
initialization takes place. The flashing
numbers indicate the subnet and address
labels, and may be used to verify that all
segments of the LED function. Self-diagnostics are performed during this time.
The compressor will remain off during the
reset period. This is the last code displayed in the reset sequence.
8
Low Oil Pressure Warning - The measured
oil pressure is below the minimum acceptable value as signaled by the sensor on
the oil pump. While the 5 is flashing, the
module is determining how much longer to
allow the compressor to run based on the
same algorithm used in the Copeland®
brand Sentronic+™ oil pressure control.
•
An open line-break protector (2D/3D
models) is determined by the current
relay in the terminal box. When line
voltage is sensed at the motor terminals and there is no motor current
detected by the relay, code 7 is
displayed.
•
All 4D models use motor sensors. The
module shuts down the compressor
when the sensor resistance values
exceed the “trip” resistance value (this
is a function of temperature only). The
code is displayed until 4 minutes have
passed and the resistance drops
below the reset value. The compressor will now run if the controller has
issued a run command.
Welded Contactor Warning - The
Intelligent Store™ Discus® has detected a
welded contactor condition after calling for
the compressor to shut off. The E2 will
command the compressor to run until the
condition is corrected.
•
The Intelligent Store™ Discus® looks
for terminal plate voltage after the contactor has been called to open. If voltage continues to be present (on any or
all terminals) - indicating the contactor
has been welded - the E2 will send a
run command to the compressor.
•
The module will load the contactor so
all three legs are energized. The 8 code
will be displayed and the compressor
will run until the reset button is actuated (or remotely such as through the
E2). Manually throwing the breaker will
be required to shut the compressor
down if the contactor remains welded.
• The algorithm will shut the compressor
off after 2 minutes of continuous low oil
pressure, or when intermittent periods
of unacceptable oil pressure exceed a
33% duty cycle.
•
The high and low pressure switches
are in series with the pilot circuit. If they
open, they will override the module in
calling for the contactor to remain
loaded.
• The 6 will be displayed until a manual or
•
Manually loading the contactor after the
• The sensor on the oil pump is an
open/closed switch, depending upon
net oil pressure. Any time the switch is
“open” prior to lockout, a 5 is displayed.
6
Motor Protection Trip - A high motor
temperature or high current condition has
shut down the compressor. The protector
must cool down and reset, or the sensors
must cool down and a minimum delay of 4
minutes must pass for automatic reset to
occur.
The module senses voltage drop
across the pressure switch to determine
whether the low suction pressure cutout
switch is open. The low suction pressure switch is in series with the pilot circuit.
FlashingDescription
5
7
Low Suction Pressure Cutout - The suction pressure has dropped below the preset minimum allowable pressure (3 psi).
The compressor has been shut down and
will be available to run when the suction
pressure rises above the reset level.
•
4
remote reset takes place.
Low Oil Pressure Lockout - The compressor is shut off due to low oil pressure.
Manual reset or remote reset is required to
enable the compressor to run again.
Remote reset must be pre-configured at
the E2 by the user.
27
AE8-1337 R1
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 control voltage rises above 180 volts for 2 seconds, the module will enable the compressor to run again.
•
A
b
Disabled by Rack Controller - The compressor is disabled until the module stops
receiving this command from the rack controller.
F
Phase Loss Trip / Lockout - One phase of
the compressor power is missing at startup or during running. The compressor will
shut down for a 5 minute period before it is
enabled to run again. If there are 10 consecutive trips, the compressor is locked
out. Manual reset, remote reset or removing module power for 5 seconds is
required to enable the compressor to run
again.
Compressor Module Failure Lockout - An
internal module fault has been detected
and communication with the rack controller 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.
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).
•
L
Decimal
point
The temperature probe in the head is
used to monitor the discharge temperature.
Loss of Communication Mode - If communication 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
28
The module monitors the voltage at the
three terminal plate connections.
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.
•
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.
•
d
E
The “Module Power” voltage is used to
make this determination.
• The module senses the voltage drop
across the pressure switch to determine whether the high discharge pressure cutout switch is open. The high
discharge pressure switch is in series
with the pilot circuit
C
that communication between the module and the Einstein™ is taking place.
The compressor will run when power is
available if a run command is still issued
by the rack controller.
A decimal point blinks during communication 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
4.2 Status Code Table
Status Code
-STEADY-
0
1
2
3
4
Description
Index of
Details
Normal - Off
4.4.1
Normal - Running
4.4.2
Normal - Demand Cooling Injecting
4.4.3
Low Suction Pressure Cutout
4.4.4
30 Second Reset
-FLASHING-
5
6
7
8
9
A
b
C
Low Oil Pressure Warning
4.4.5
Low Oil Pressure Lockout
4.4.5
Motor Protection Trip
4.4.6
Welded Contactor Warning
4.4.7
Compressor Module Supply Voltage Trip
4.4.8
Compressor Module Failure Lockout
4.4.9
Discharge Pressure Trip
4.4.10
Discharge Temperature Lockout
4.4.11
d
E
F
Loss of Communication Mode
4.4.12
Disabled by Rack Controller
4.4.13
Phase Loss Trip / Lockout
4.4.14
L
No 3-Phase Compressor Power Trip
4.4.15
No Power to Module
4.4.16
No Code
4.4.17
Unknown Code
4.3 Startup Codes
4.4 Status Code Troubleshooting
Upon initial startup or immediately following a manual
reset the Intelligent Store™ Discus® module will display a flashing sequence of symbols. This is a normal
part of the power-up or reset process. The first character “8” is displayed so the user can verify that all
segments of the display are illuminated and functioning properly. The second character “A” is displayed
just before the subnet and node address of the module are shown. The subnet and node address information is displayed as follows:
The seven segment display (LED) on the front of the
Module gives the service technician continuous
feedback regarding the status of the compressor. Five
NORMAL operating conditions and twelve FAULT
conditions can be indicated. The sections below
describe the status codes, and provide basic fault tree
diagnostics for troubleshooting.
The characters 0 0 1 n 1 5 correspond to a node
address of 1 and a subnet address of 15. The module
displays this information once again so the user can
confirm the address.
29
AE8-1337 R1
30
AE8-1337 R1
31
AE8-1337 R1
32
AE8-1337 R1
33
AE8-1337 R1
34
AE8-1337 R1
Figure 4.1 Measuring Resistance
Across Current Relay (the value
should be less than 3 Ohms with the
compressor running)
35
AE8-1337 R1
36
AE8-1337 R1
37
AE8-1337 R1
38
AE8-1337 R1
39
AE8-1337 R1
Accessory Fuse
Figure 4.2 Accessory Fuse Location
40
AE8-1337 R1
Figure 4.3 Communications Wiring
41
AE8-1337 R1
Flashing d
Loss of Communication Mode
(continued)
2.3 to 2.6 VDC
Communication Troubleshooting
• DC Voltage 2.3v - 2.6v (all devices must be connected to the communications
network)
• Voltage between 485+ and 485- is typically less than 0.3vdc.
• An open wire, poor connection or misplaced jumper will affect voltage.
Touch
points to
measure
voltage
Communication Board Troubleshooting
The communication board is a sacrificial element to protect the main board from
damage due to voltage spikes.
• DC Voltage output 2.3 - 2.6v
• 0 volts brown to red or black to red indicate a damaged communication board.
Replace communication board (see parts list).
42
AE8-1337 R1
Determine Reason
Einstein™ System
Override Set to
“On”
Correct Reason
and Set Einstein™
System Override
to “Off”
43
AE8-1337 R1
Figure 4.4 3D Voltage Sensor
Connections
Figure 4.5 4D Voltage Sensor
Connections
44
AE8-1337 R1
Contactor Fuse
Figure 4.6 Contactor Fuse
Location
45
AE8-1337 R1
46
AE8-1337 R1
47
AE8-1337 R1
5. Maintenance Procedures for
Intelligent Store™ Discus®
Compressors
Emerson Climate Technologies, Inc. requires that all
customers review the recommended guidelines in the
published Application Engineering Bulletins, and
ensure that best engineering practices are followed in
the use of Copeland® brand compressors. Emerson
Climate Technologies, Inc. Application Engineering
Bulletins can be found on our website,
EmersonClimate.com under the section titled “Online
Product Information”. The advice and conclusion by
Emerson Climate Technologies, Inc. represents our
best judgment under the circumstances, but such
advice given and/or conclusion made, or results
obtained shall be deemed used at your sole risk.
Reference Drawing of 2D / 3D Enclosure and Accessories
HARNESS CONNECTORS
To Remove: Depress 2 tabs before pulling
To Install: Push in until connector “snaps”
HIGH PRESSURE CUTOUT SWITCH AND CONNECTOR
Red Dot in Center
Red Wire Harness (HPCO)
FRONT CONTROL BOX
DISCHARGE TEMPERATURE PROBE
Black/White Harness
Attach Green Wire to Ground Screw
TEMPERATURE SENSOR
GROUND SCREW
HARNESS ANCHOR
SCREW “B”
SCREWS “A”
SIDE BOX
HOUSING COVER NUTS
DEMAND COOLING
SOLENOID COIL
Brown Wire Harness
(Liquid Injection)
LOW PRESSURE CUTOUT SWITCH AND CONNECTOR
White Dot in Center
Blue Wire Harness (LPCO)
Install Torque
25-30 ft-lb
Figure 5.1 2D/3D Enclosure Label
5.1 Demand Cooling Service Procedures
The demand cooling valve injects liquid refrigerant
into the suction manifold to keep the discharge gas
temperature within a safe operating range. Excessive
discharge gas temperature will lead to ring and cylinder wear, valve wear and oil coking. Each Intelligent
Store™ Discus® compressor has a temperature
probe in the head to continually monitor the discharge
gas temperature. The injection valve is energized
when the temperature of the probe exceeds the
“Injection Start” temperature. When the probe temperature drops below the “Injection Stop” temperature,
the injection valve closes (is de-energized). Refer to
table 5.2 below for reference temperatures by model.
Note that the temperatures shown for 2D and 3D
4D
3D
Head Probe
Location
ISD
Standard
ISD & Standard
Standard
Demand
Cooling
310
NA
292
282
Head Temperature (°F)
Maximum (Trip)
Reset
Liquid Injection Start
Liquid Injection Stop
2D/3D
ISD
4D
ISD
280
250
266
264
310
268
292
282
Figure 5.2 Head Temperature Comparison
48
AE8-1337 R1
Intelligent Store™ Discus® Compressors are lower
than for standard demand cooling compressors. This
is to compensate for the probe location used on the
Intelligent Store™ Discus®. The actual peak gas
temperatures inside the head are correspondingly
higher and will be at the standard demand cooling
levels during injection start, injection stop and at the
maximum trip temperature.
The following demand cooling service procedures are
covered below:
•
•
•
•
Manually triggering injection
Temperature probe inspection
Coil inspection and replacement
Injection valve replacement
5.1.1 Manually Triggering Injection
Injection may be forced for diagnostic purposes only,
by sending a signal to the module that the probe
temperature is above the “Injection Start” temperature. The probe is an NTC (Negative Temperature
Coefficient) unit meaning that its resistance decreases with increasing temperature. Unplugging the
temperature probe from the harness and holding a
jumper across the harness connector will signal the
module to load the coil, if the compressor is running.
Caution: Inserting an oversize wire into the connector
will “spring” open the female connector terminals,
impairing their function. See figure 5.3 below for a
view of a jumpered harness.
ance to determine whether the probe itself is faulty.
Refer to figure 5.4.
Thermometer
Temp. (F°)
Calculated Sensor
Resistance (Ohms)
59
60.8
62.6
64.4
66.2
141426
135000
128907
123129
117639
68
69.8
71.6
73.4
75.2
112437
107478
102762
98289
94041
77
78.8
80.6
82.4
84.2
90000
86139
82476
78984
75663
86
87.8
89.6
91.4
93.2
72504
69480
66609
63864
61254
95
96.8
98.6
100.4
102.2
58770
56394
54126
51966
49914
104
105.8
107.6
109.4
47943
46053
44262
42543
Figure 5.4 Temperature Probe Resistance
Plug the connector back in and look at the head
temperature for this compressor on the E2 screen.
Agreement between the calculated probe temperature based on resistance and the E2 temperature indicate the harness connection is good. An extreme temperature indicates the probe is faulty.
A probe temperature based on resistance that seems
reasonable based on the approximate temperature of
the head indicates the probe itself is not faulty. If the
E2 shows a head temperature that is obviously not
correct, visually inspect the harness connector to look
for signs of corrosion or for “sprung” female terminals
in the harness. If the terminals appear to be “sprung”,
carefully squeezing the outside of the plug to reconfigure their shape may yield acceptable contact.
Nyogel 760G lubricating grease is used in the
connector to prevent fretting and corrosion.
Jumper Wire
Figure 5.3 Jumpered Temperature Input on Harness
5.1.2 Temperature Probe Inspection
Erroneous temperature probe readings are often due
to “sprung” connections at the harness, or corrosion
on the harness connector surfaces. A reading of
approximately -40F is indicative of an open circuit or
poor electrical connection. Unplug the temperature
probe from the harness and measure the probe resist49
AE8-1337 R1
5.1.3 Coil Inspection and Replacement (2D / 3D)
Refer to figure 5.1 for the location of the injection coil.
The coil may be removed by unplugging the harness
from the coil and lifting the coil. The retention snap on
the top of the coil is held in place by an internal spring
and will snap off with sufficient lifting force. Do not
lose the retention snap!
Remove
Head Cover
Screws
The resistance of a good coil should be 490 Ohms to
600 Ohms.
A coil that is “shorted” or “open” may have blown the
1/2 amp accessory fuse on the side of the module.
Inspect the fuse when replacing the coil or
troubleshooting a “failure to inject”. Refer to figure
5.5. Replace the retention snap when the coil is
installed.
To replace the coil, loosen the conduit clamp as
shown in the photo below. Remove the coil from the
mounting bracket and install a new coil.
Inspect the 1/2 amp accessory fuse on the side of the
module and replace if necessary. Use a fast-blow
replacement fuse such as Bussman AGC - 1/2 A.
1
/2 Amp
Accessory
Fuse Here
Loosen
Conduit Clamp
to Change Coils
Figure 5.5 Accessory Fuse Location
5.1.4 Coil Inspection and Replacement (4D)
Install the harness shroud before installing the
terminal box cover.
The terminal box cover and side shroud must be
removed to inspect or replace the injection coil of a
4D compressor.
Remove (3) terminal box and (4) head cover screws.
Remove
Terminal
Box Cover
50
AE8-1337 R1
5.1.5 Injection Valve Replacement (2D / 3D)
Reference Drawing of 2D / 3D Enclosure and Accessories
HARNESS CONNECTORS
To Remove: Depress 2 tabs before pulling
To Install: Push in until connector “snaps”
DISCHARGE TEMPERATURE PROBE
Black/White Harness
Attach Green Wire to Ground Screw
TEMPERATURE SENSOR
GROUND SCREW
HIGH PRESSURE CUTOUT SWITCH AND CONNECTOR
Red Dot in Center
Red Wire Harness (HPCO)
FRONT CONTROL BOX
HARNESS ANCHOR
SCREW “B”
SCREWS “A”
SIDE BOX
HOUSING COVER NUTS
DEMAND COOLING
SOLENOID COIL
Brown Wire Harness
(Liquid Injection)
LOW PRESSURE CUTOUT SWITCH AND CONNECTOR
White Dot in Center
Blue Wire Harness (LPCO)
Install Torque
25-30 ft-lb
Note: There are no unique injection valve service
procedures for the 4D Intelligent Store™ compressor. Use conventional 4D valve change-out
procedures.
1. Disconnect power to the compressor and module.
2. After isolating the liquid line by closing the shutoff, relieve trapped pressure by actuating the solenoid.
This is very important! When heated, pressures generated by trapped refrigerant may
lead to a ruptured tube. Wear safety goggles
when using a torch. Evacuate the compressor
per accepted industry practice. Unsolder the injection tube below the side box. Keep the torch flame
out of the side box to avoid burning the wire harness. A wet rag around the valve is recommended
for additional protection.
Screw B
Deutsch Plugs
3. Unsnap the injection coil and lift it off of the valve
stem.
4. Unplug the two Deutsch harness connections that
enter the side of the rear terminal box. Depress
the two tabs (top and bottom) to release the connectors.
5. Remove screws “A” and “B” (see the enclosure
diagram above, and the accompanying photographs).
51
Screws A
AE8-1337 R1
6. Lower the side box to provide wrench clearance to
the injection valve bolt.
8. Remount the side box by installing screws “A” and
“B.”
7. Install a new valve, using new gaskets and torque
to 25 - 30 ft-lb. Note: In an emergency, gaskets
may be re-used if there is no apparent damage to
the gasket such as tearing or delamination.
9. Install the injection coil and terminal box harness
connections (push them in until a distinct “snap” is
heard). The connectors are designed to guarantee proper orientation. If they won’t go in, rotate
them 180º and try again.
10. Reconnect the liquid line to the new valve. Note
that trimming the injection valve tube may damage
the internal strainer. Emerson Climate
Technologies, Inc. recommends that modifications
not be made to the tube. Use the same flame precautions as in step 2.
11. Use approved refrigeration service procedures to
evacuate the compressor and liquid line. Make
certain that liquid is available to the injection valve
by opening the supply valve.
IMPORTANT! Note that there are two gaskets used.
52
AE8-1337 R1
5.2 Compressor Replacement - 2D and 3D
5.2.1 Removal of the Compressor
Note: The following instructions assume the same front module is being used on the new compressor. If the
module is being replaced, refer to module change-out procedures for start-up procedures. Steps with an *
indicate they pertain to module replacement instructions in section 5.3.
Reference Drawing of 2D / 3D Enclosure and Accessories
HARNESS CONNECTORS
To Remove: Depress 2 tabs before pulling
To Install: Push in until connector “snaps”
DISCHARGE TEMPERATURE PROBE
Black/White Harness
Attach Green Wire to Ground Screw
TEMPERATURE SENSOR
GROUND SCREW
HIGH PRESSURE CUTOUT SWITCH AND CONNECTOR
Red Dot in Center
Red Wire Harness (HPCO)
FRONT CONTROL BOX
HARNESS ANCHOR
SCREW “B”
SCREWS “A”
SIDE BOX
HOUSING COVER NUTS
DEMAND COOLING
SOLENOID COIL
Brown Wire Harness
(Liquid Injection)
LOW PRESSURE CUTOUT SWITCH AND CONNECTOR
White Dot in Center
Blue Wire Harness (LPCO)
Install Torque
25-30 ft-lb
1. Turn off power to the compressor, crank case
heater and module.*
4. Unplug the low and high voltage Harness
Connectors (Deutsch plugs) from the terminal
box. (figure 5.7) *
2. Isolate the compressor and evacuate per accepted industry practice.
3. Inside the Rear Terminal Box (figure 5.6)
a. Remove terminal lug nuts holding voltage
sensing eyelets.
b. Loosen terminal lug connections.
c. Remove T-box anchor screw holding the box
to the compressor.
Low
Voltage
High
Voltage
(4x) anchor screws - same
location as conventional 2D/3D
Figure 5.7 Deutsch Plugs
5. Remove screw “B” from the side box into the rear
terminal box.
6. Unplug all harness connections in the side box,
and loosen temperature sensor ground screw. *
7. Remove the front cover (2 screws) and unplug the
communication plug from the module and carefully extract the communication line out of the module. *
Voltage Sensing Leads
Figure 5.6 Terminal Box
53
AE8-1337 R1
8. Unscrew the high and low pressure cutout switches.
9. Lift the demand cooling coil off of the injection
valve (if present).
5. Mount injector valve to the adapter on the body.
Using 2 gaskets (under the bolt flange and
between the injector and the adapter) - torque the
bolt to 25 - 30 ft-lb.
6. Put the side box on, loosely fitting screw “B.”
10. Unplug the oil pump sensor lead from the oil pump
sensor. *
11. Remove 2 screws “A” and housing cover nuts
holding front box (2). *
12. Remove the front control box. *
13. Lift off the side box.
14. Remove the injection valve bolt and gaskets from
the compressor.
15. Lift the T-box away from the terminal plate.
Remove the compressor from the rack using proper tools and procedures to assure safety, and to
prevent damage to the rack or other compressors.
5.2.2 Installation of the compressor (2D / 3D)
Note: Service compressors built on or after the following S/N date codes are compatible with
Intelligent Store™ Discus® components:
2D and 3D
S/N 04D
4D
S/N 05D
1. Mount the new compressor in the rack, lifting and
maneuvering the compressor in a manner to prevent personal injury and damage to other compressors on the rack.
2. Transfer the injection valve adapter (if used) to the
new compressor. Torque 25-30 ft-lb. Use pipe
plug sealing compound.
7. Install high pressure cutout (360 PSI) on the head,
and low pressure cutout switch (WHITE DOT - 3
PSI) beside the injector valve. Double Check
Positions!! On most compressors, the high pressure cutout has leads, the low pressure switch
does not.
8. Feed the main harness through the hole in the
front of the side box. Tighten the housing cover
nuts to hold the front box in position. Install communication wire and plug. Use the harness anchor
to hold the harness.
9. Install and tighten screws “A”, and tighten screw
“B” at the T-box.
10. Push on all electrical connections, the oil pump
sensor lead, and connect the temperature probe
ground screw. Note: When the Deutsch plugs are
properly installed there will be a distinct “snap”.
Keys on the side of the plugs prevent improper
orientation. Rotate the plugs 180º if they won’t go
in. They fit snugly.
11. Install and tighten all cover screws (T-box, front
cover, side box cover).
12. Plug in the communication line to the communication board in the module.
13. Refer to section 3.4, Compressor Naming, to edit
the E2 for changes to the compressor serial number.
3. Transfer the temperature sensor plug to the head
of the new compressor. Use pipe plug sealing
compound.
4. Install the T-box anchor screws. Connect motor
wiring, voltage sensing (eyelet connectors), crank
case heater and module power connections. Pass
one power lead through the current relay.
54
AE8-1337 R1
5.3
Module Replacement for 2D / 3D
5.4.1 Compressor Replacement
Refer to section 5.6.1, “Determine the Replacement
Module Part Number”. Note that the failed module
should be returned to the wholesaler to prevent payment of a core charge.
Refer to section 5.2 (“Compressor Replacement for
2D and 3D”) for module removal instructions.
Remove the module by following these steps in
section 5.2 (the module removal steps are marked
with an asterisk *):
1. Remove the module and mounting bracket from
the compressor by following the instructions
below for “Head Inspection”.
2. Remove the suction pressure switch conduit from
the module. This will completely isolate the module and mounting bracket from the compressor.
3. Remove the voltage sensing wires from the terminal posts. (figure 5.8)
4. Remove the motor sensor leads from the
sensor lead terminal strip. (figure 5.8)
• Step 1
• Steps 4 - 7
• Steps 10 - 12
Mechanical installation of the new module will be the
reverse of these steps.
After completing the mechanical installation, refer to
section 5.6.2, “Power-Up Instructions for the New
Module”. The power-up steps will allow the E2 to populate the module with configurable settings appropriate for this particular compressor.
Note: If you replaced a module that had only one
fuse in the side, or perhaps no fuse, you must not
re-use the field retrofit “snubber” connected to
the discharge pressure switch. Discard the snubber - it is not needed with the twin-fuse module.
Additionally, the in-line fuse in the terminal box
(for the contactor coil) may be discarded.
Voltage Sensing Leads
Motor Sensor Leads
Figure 5.8 4D Terminal Box Assembly
5. Remove the mounting screws in the terminal box
that attach the terminal box to the
compressor.
Discard “Snubber”
6. Lift the terminal box away from the compressor.
7. Remove the compressor from the rack using
accepted industry procedures for safety.
8. Install the new compressor, and mount the components and accessories in reverse order of the
disassembly process.
•
5.4 Service Procedures for the 4D Compressor
• Compressor Replacement
• Front Box Replacement
• Head Inspection
55
Take specific note to connect the red harness
leads (labeled “HPCO”) to the high pressure
cutout switch on the head. The high pressure
switch has leads. Verify the pressure setting
on the switch. When replacing the switch,
use
only
an
Emerson
Climate
Technologies, Inc. approved pressure
AE8-1337 R1
switch with a Schraeder depressor (deflator). Refer to the parts list in Appendix C.
•
Connect the blue “LPCO” leads to the low
pressure switch. Verify pressure setting on the
switch. When replacing the switch, use only
an Emerson Climate Technologies, Inc.
approved pressure switch with a
Schraeder depressor (deflator). Refer to the
parts list in Appendix C.
9. Refer to section 3.4, Compressor Naming, to edit
the E2 for changes to the compressor serial number.
5.4.2 Suggested Procedure for Replacement
of the Module (4D)
Remove
Head Cover
Screws
5. Remove screws (2) from the front box that hold
the rear guide shroud in place.
6. Remove the rear guide shroud.
Refer to section 5.6.1 below, “Determine the
Replacement Module Part Number”. Note that the
failed module should be returned to the wholesaler to
prevent payment of a core charge.
To remove the old module:
1. Remove the terminal box cover (3 screws).
Remove
Screws
2. Remove the head cover (4 screws).
3. Unplug all harness connections that were under
the head cover shroud. Unplug the oil pressure
sensor harness at the oil pump.
4. Remove the front cover from the module. Unplug
the communication wire from the communication
board.
Remove
Shroud
Remove
Terminal Box
Cover Screws
7. Remove two mounting bracket nuts beneath the
front box. Front box may now be removed.
Remove
Nuts
56
AE8-1337 R1
8. Installation of a new front box will be the reverse
of these steps.
9. If you are replacing a module that has only one
fuse in the side, or perhaps no fuse, you must not
re-use the field retrofit “snubber” connected to the
discharge pressure switch. Discard the snubber it is not needed with the twin-fuse module.
Remove
Head Cover
Screws
3. Unplug all harness connections, including the oil
pressure sensor harness.
4. Remove the front cover from the module and
unplug the communication wire from the communication board.
Discard “Snubber”
Refer to section 5.6.2, “Power-Up Instructions for the
New Module”. After mounting and electrically connecting the module, the power-up steps will allow the
E2 to populate the module with configurable settings
appropriate for this particular compressor.
5.4.3
5. Disconnect the demand cooling conduit (if present) from the mounting bracket, and remove the
high pressure cutout switch. Unplug the temperature probe connector from the harness and
remove the ground screw connection. Pull the
temperature probe lead out through bracket to
prevent straining the lead when the front box and
bracket are lifted off of the compressor. Lift the
unloader coil off of the unloader stem.
Suggested Procedures for Conducting
a Head Inspection
1. Remove the terminal box cover (3 screws).
2. Remove the head cover (4 screws).
Disconnect
Demand Cooling
Conduit
Remove
Mounting
Bracket
Nuts
Remove
Terminal Box
Cover Screws
6. Remove the three nuts holding the mounting
bracket in place, and lift the bracket and front box
off of the head.
57
AE8-1337 R1
7. Procedures to remove the head are the same as
for any other Discus® compressor.
8. Installation of the module will follow the removal
steps in reverse.
Replacement will be the reverse of these steps.
5.5
Serial Number Change after
Compressor Replacement
After the compressor has been changed out and the
Intelligent Store™ Discus® components are put back
in place, the E2 should be edited to reflect the new
compressor S/N, and perhaps the model number that
is appropriate. See later comments (section 5.7)
regarding the Event Counters.
NOTE: The module and E2 don’t require proper
model numbers, EXCEPT for proper operation of
unloaders. Even if the stages are properly set up and
defined, the E2 will not control unloaders unless a
modulated model number is used. This is only
important if you have added (field up-grade)
modulation equipment to an existing compressor, or
perhaps installed a different compressor that now has
modulation.
Example:
Original compressor on rack
Modulation head added,
new model number
Figure 5.9 ISD Compressor Screen
Select the compressor that you wish to rename and
Press F5 (Setup). The ISD Compressor Screen
should be displayed as shown in figure 5.10. Key in
the desired text for the new serial number, or perhaps
model. Additional information for this compressor
may be entered in the category for Long Name.
3DS3A100E-TFD
3DR3A100E-TFD
Access the appropriate E2 screens as shown on this
page.
To change the model or serial number after installing
a new compressor, access the ISD Summary Screen
(figure 5.9) on the E2:
1. Press menu to open the Main Menu.
2. Press 5 (Configured Applications).
3. Press 35 (ISD Compressor).
Figure 5.10 ISD Setup Screen
58
AE8-1337 R1
5.6 Replacement Module Information
The module P/N will be 985-0102-xx, where “xx” is the
node number.
5.6.1 Determine the Replacement Module
Part Number
When ordering a replacement module (front box) the
address (node number) is required. The replacement
part number reflects the node number that is pre-programmed into the module. There are several screens
on the E2 that display the node number of the
compressor. An example is the online status screen:
1.
2.
3.
4.
Press
Press
Press
Press
Example:
Node number 3: order 985-0102-03
Node number 11: order 985-0102-11
Note: To avoid paying a core charge, return the
failed module to your Authorized Emerson® FullLine or Authorized Copeland® Wholesaler when
taking delivery of the new module.
5.6.2 Power-Up Instructions for the New
Module
menu to open the Main Menu.
7 (System Configuration).
7 (Network Setup).
1 (Online Status).
1. Complete the mechanical installation procedures
for installation of the module (section 5.3 for 2D /
3D, section 5.4.2 for 4D). Always turn off compressor power before working with the module
and its associated wiring harness.
2. After making all harness connections (including
plugging in the communication line), move the
blue communication board jumpers to the proper
position. If the compressor is at the end of the
communication line daisy-chain, the jumpers are
positioned to “terminated”. If the compressor is in
the middle of the daisy-chain, the jumpers are
positioned to “unterminated”. Refer to figure 2.11
for a diagram explaining the jumper positions.
3. Turn on power to the module. A module that has
been installed on a 2D or 3D compressor will typically display a flashing “7” code until step 4 below
has been completed.
Figure 5.11 View of Ultrasite™ Screen
4. After verifying that communication has been
established with the new module (observe that the
decimal point blinks at least once), reboot the E2.
This can be accomplished by temporarily turning
the E2 power off, and after 10 seconds turning it
back on. It is important that the module power
remain ON for this process. The E2 will download
all of the configuration settings from the previous
module into the new module. This may take several minutes. All compressors on the rack may
momentarily shut off for a few seconds as the E2
reboots.
Node Number
5.7 Event Counters - Service Procedures
Updating the Event Counters
Figure 5.12 View of E2 ONLINE STATUS Screen
The replacement part number reflects the node
number. An easy way to verify that the node number
is correct is to see that the status is “off line” when
the module is not powered up, or has been
removed in the service process.
59
The E2 cannot clear or re-zero the “Event Counters”
in the module. This means that if a compressor or
module is replaced, the Event Counters reflected in
the E2 will not be correct. We recommend that the
user use the Notepad feature of the E2 to indicate the
change in the Event Counters of the module when
AE8-1337 R1
either a compressor or module is replaced. In this way
a record can be maintained and the user will be able
to assess the true history of the compressor. Using
the E2 Notebook feature is discussed in section 8.7.6
of the E2 Operation Manual.
5.8 Pressure Switch Replacement
The discharge and pressure switch adapters have
Schraeder valves in them. It is not necessary to
evacuate the compressor before replacing a switch. It
is imperative that an Emerson Climate Technologies,
Inc. approved pressure switch be used (see the part
number list in the Appendix). This will guarantee that
a Schraeder depressor is a part of the switch. The
Schraeder adapter enters the body with a 1/8” pipe
tap. Use a wrench to keep it from turning as the pressure switch is loosened and removed from the
adapter, or while tightening the switch during installation.
5.10 Lifting Instructions
The recommended method to lift a compressor during
installation or removal is to install an eye-bolt in the
provided hole(s). If an eye-bolt is not available, a
strap may be used. However, care must be taken to
prevent damage to the sheet metal enclosures. Do
not attempt to lift the compressor with a strap around
the side box. Instead, the strap should be placed
behind the side box and directly around the compressor as shown in figure 5.14. In order to position the
strap, it may be necessary to loosen or remove screw
“B” holding the side box to the terminal box.
Refer to figure 5.13 below.
Figure 5.14 Lifting Strap Placement
Figure 5.13 Pressure Switch and Schraeder Adapter
5.9 “Hi-Pot” Testing
The motor may be electrically tested using a “Hi-Pot”
tester per Emerson Climate Technologies, Inc.
approved procedures without disconnecting the voltage sensing wires. If the high voltage Deutsch plug is
removed during test, be aware that several of the
exposed connector pins will have the tester voltage
on them.
60
AE8-1337 R1
Appendix A
A-1 Wiring
Figure A.1 Wiring Diagram of Module, Harness and Deutsch Plugs in Terminal Box
Figure A.2 Low Voltage Plug on 4D Compressors: Pins 1, 2, 7, and 8 Go To Motor Sensors
61
AE8-1337 R1
A.2 Fusing
View From Side Box
Squeeze
These
Tabs to
Remove
Plug
Figure 6.1
Low Voltage Plug
5 Volts
High Voltage Plug
230 Volts
View of Terminal Box
Accessory Coils (1/2 amp)
Use Bussman AGC - 1/2A
Figure 6.3
or equivalent
• Injection
• Unloader
Contactor Coil (2 amp)
Use Bussman GMA - 2A
or equivalent
Current
Relay
To
Contactor:
Black/Red
208/230 V
Module Power
• Black/White
• 208/230 V
Voltage Sensing Leads
• Ring Terminals
• Not Polarity Sensitive
In-Line Retrofit Contactor Coil Fuse
Crankcase Heater
• 230 Volts
Figure 6.2
All service modules have two fuses: One fuse
62
AE8-1337 R1
(1/2 amp) for the accessory coils, and one fuse
(2 amp) for the contactor coil (refer to figure 6.1).
Always use a fast-blow fuse for replacement.
When replacing a module that has only one fuse on
the module (or perhaps no fuse), remove the contactor coil fuse that is found in the terminal box (refer to
figure 6.2). There may also be an accessory fuse in
the side box (2D / 3D) that may be discarded.
Inspect fuses if the contactor fails to load, or if an
accessory will not activate.
A.3 Communication Wiring
•
Communication wire should ideally be a
shielded, twisted pair cable such as Belden
#8641 (24 AWG) or Belden #8761 (22AWG).
•
Daisy-chain per the attached diagram below,
setting all 3 jumpers to the proper position.
•
Do not route the communication wire through
hi-voltage conduit, in close proximity to contactors or parallel to high current wires.
•
The maximum recommenced length for communication wires is 4000 ft for 18 to 22 AWG
or 2500 ft for 24A WG.
Appendix B
Demand Cooling Temperature Comparison
Refer to section 5.1 for a more detailed description of
liquid injection operation.
The table below gives comparison temperature readings for Intelligent Store™ Discus® vs. values for conventional Demand Cooling. Note that the 2D and 3D
temperatures are significantly lower than for standard
demand cooling (D.C.). This is to compensate for the
probe location used on the Intelligent Store™
Discus®. The actual peak gas temperatures inside
the head are correspondingly higher and will be at the
standard demand cooling levels during injection start,
injection stop and at the maximum trip temperature.
When reading head temperatures from Intelligent
Store™ Discus® 2D and 3D compressors, add
approximately 25°F to 30°F for a comparison to compressors with a probe mounted in the front corner of
the head.
4D
3D
Head Probe
Location
ISD
Standard
Head Temperature (°F)
Maximum (Trip)
Reset
Liquid Injection Start
Liquid Injection Stop
ISD & Standard
Standard
Demand
Cooling
310
NA
292
282
2D/3D
ISD
4D
ISD
280
250
266
264
310
268
292
282
Figure B.1 Comparison Temperature Readings
Figure A.3 Compressor Communications Wiring
63
AE8-1337 R1
Appendix C Aftermarket Parts
Service #
Description
962-0902-00
Emerson Climate Technologies Intelligent Store™ Discus® Side Box. Includes side box and mounting
hardware. For usage on specific Copeland® Brand 3D Discus® Compressors.
962-0900-00
Emerson Climate Technologies Intelligent Store™ Discus® Side Box. Includes side box and mounting
hardware. For usage on specific Copeland® Brand 2D Discus® Compressors.
985-0125-00
High Pressure Cutout Switch. For usage with Emerson Climate Technologies Intelligent Store™
Discus® Module on specific Copeland® Brand 2D, 3D and 4D Discus® Compressors.
985-0183-01
Low Pressure Cutout Switch. For usage with Emerson Climate Technologies Intelligent Store™
Discus® Module on specific Copeland® Brand 2D, 3D Discus® Compressors.
985-0121-00
Low Pressure Cutout Switch. For usage with Emerson Climate Technologies Intelligent Store™
Discus® Module on specific Copeland® Brand 4D Discus® Compressors.
910-0576-00
Unloader Assembly. For usage with Emerson Climate Technologies Intelligent Store™ Discus® Module
on specific Copeland® Brand 4D Discus® Compressors.
985-0109-00
Temperature Sensor. For usage with Emerson Climate Technologies Intelligent Store™ Discus®
Module on specific Copeland® Brand 2D, 3D and 4D Discus® Compressors.
910-0531-00
Demand Cooling Valve Kit for 3D Intelligent Store™ Discus® Compressors - 208/230v, 60 Hz. Includes
valve and solenoid coil, adapter, hex flange screw and gasket.
910-0531-02
Demand Cooling Valve Kit for 2D Intelligent Store™ Discus® Compressors - 208/230v, 50/60 Hz.
Includes valve and solenoid coil, adapter, hex flange screw and gasket.
918-0028-05
Crankcase Heater, 240v, 100w. For usage on specific Copeland® Brand 3D Discus® Compressors
with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes crankcase heater,
connector and reference drawings.
962-0126-00
Electrical Terminal Box Assembly. For usage with specific Copeland® Brand 3D Discus® Compressors
with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes current sensing
relay.
962-0127-00
Electrical Terminal Box Assembly. For usage with specific Copeland® Brand 2D Discus® Compressors
with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes current sensing
relay.
962-0134-00
Electrical Terminal Box Assembly. For usage with specific Copeland® Brand 4D Discus® Compressors
with Emerson Climate Technologies Intelligent Store™ Discus® Module.
074-1033-00
Side Bracket. For usage with specific Copeland® Brand 4D Discus® Compressors with Emerson
Climate Technologies Intelligent Store™ Discus® Module.
024-0253-00
Electrical Guard. Guard Only. For usage with specific Copeland® Brand 4D Discus® Compressors with
Emerson Climate Technologies Intelligent Store™ Discus® Module.
940-0160-00
Current Sensing Relay Kit. For usage with specific Copeland® Brand 2D/3D Discus® Compressors
with Emerson Climate Technologies Intelligent Store™ Discus® Module.
998-0326-03
Solenoid Assm Valve 240V. For usage on specific Copeland® Brand 3D Discus® Compressors with
Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes solenoid assembly valve
with 240V coil and gasket.
998-0008-33
Oil Pump Kit. For usage with specific Copeland® Brand 2D/3D/4D Discus® Compressors with
Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes 510-0532-00 Schraeder
valve for 2D/3D CST applications.
64
AE8-1337 R1
905-0911-00
Electrical Terminal Box Cover. Cover Only. For usage with specific Copeland® Brand 3D Discus®
Compressors with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes
052-0837-00 wiring diagram.
905-0911-01
Electrical Terminal Box Cover. Cover Only. For usage with specific Copeland® Brand 3D Discus®
Compressors with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes
052-0803-00 wiring diagram.
023-0052-00
220v Capacity Control Coil for 2D/3D CST demand cooling and 4D unloader assembly valves.
962-0828-00
Emerson Climate Technologies Intelligent Store™ Discus® Side Box. Includes side ‘cover’ assembly
and mounting hardware. For usage on specific Copeland® Brand 4D Discus® Compressors.
905-0826-00
Electrical Terminal Box Cover. Cover Only. For usage with specific Copeland® Brand 4D Discus®
Compressors with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes
052-1349-00 wiring diagram.
905-0826-01
Electrical Terminal Box Cover. Cover Only. For usage with specific Copeland® Brand 4D Discus®
Compressors with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes
052-1350-00 wiring diagram.
905-0826-02
Electrical Terminal Box Cover. Cover Only. For usage with specific Copeland® Brand 4D Discus®
Compressors with Emerson Climate Technologies Intelligent Store™ Discus® Module. Includes
052-1351-00 wiring diagram.
998-1125-00
Oil Cooler Kit. For Usage on specific 4D Discus® Compressors with Emerson Climate Technologies
Intelligent Store™ Discus® Module.
985-0102-01
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 1. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-02
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 2. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-03
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 3. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-04
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 4. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-05
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 5. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-06
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 6. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-07
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 7. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-08
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 8. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-09
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 9. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
65
AE8-1337 R1
985-0102-10
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 10. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-11
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 11. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
985-0102-12
Emerson Climate Technologies Intelligent Store™ Discus® Module- Node 12. For usage on specific
Copeland® Brand 2D, 3D and 4D Discus® Compressors. Includes front box assembly and wiring
harness.
943-0028-00
ISD Communications Board Kit. Communications board for 2D/3D/4D ISD models.
998-2119-40
Unloader Kit 220V for 4D ISD Models. Converts: 4DA3* to 4DE3*, 4DH3* to 4DK3*, 4DJ3* to 4DR3*.
998-2119-41
Unloader Kit 220V for 4D ISD Models. Converts: 4DL3* to 4DP3*, 4DT3* to 4DS3*
510-0370-00
Pressure Switch Schraeder Valve for 3D ISD Models.
66
AE8-1337 R1
Appendix D
3D Intelligent Store™ Discus® Reference Drawing
67
AE8-1337 R1
2D Intelligent Store™ Discus® Reference Drawing
68
AE8-1337 R1
4D Intelligent Store™ Discus® Reference Drawing
69
AE8-1337 R1
Appendix E
Technical Support
For technical support or assistance in resolving issues with the Intelligent Store™ Discus® Compressor Module
or with the E2 contact the Computer Process Controls™ support line. Technical support can be reached at
(770)-425-2724 in the Atlanta, GA metro area or toll free at 1-800-829-2724.
70
AE8-1337 R1
1675 West Campbell Road
Sidney, OH 45365
(937) 498-3011
EmersonClimate.com
2006CC-15 R2 (10/06) Emerson®, Emerson. Consider It Solved™, Emerson Climate Technologies™ and the Emerson
Climate Technologies™ logo are the trademarks and service marks of Emerson Electric Co. and are used with the
permission of Emerson Electric Co. Sentronic+™, Discus®, Copeland®, and the Copeland® brand products logo are the
trademarks and service marks of Emerson Climate Technologies, Inc. All other trademarks are the property of their
respective owners. © 2006 Emerson Climate Technologies, Inc. All rights reserved.Printed in the USA.