Emerson ZXME020E, ZXME025E, ZXME030E, ZXME040E, ZXME050E Application Guidelines

Application Guidelines

Copeland EazyCool

™

Outdoor Condensing Units
ZX Range

C6.1.6/1017-1219/E

About these guidelines ................................................................................................ 1

1 Safety instructions ............................................................................................ 1

1.1 Icon explanation ................................................................................................................. 1

1.2 Safety statements .............................................................................................................. 1

1.3 General instructions ........................................................................................................... 2

2 Product description .......................................................................................... 3

2.1 General information about Copeland EazyCool™ ZX condensing units ........................... 3

2.2 EU Ecodesign Directive 2009/125/EC ............................................................................... 3

2.3 Main product features ........................................................................................................ 3

2.4 Product nameplate ............................................................................................................. 5

2.5 Nomenclature ..................................................................................................................... 6

2.6 Application range ............................................................................................................... 6

2.6.1 Qualified refrigerants and oils ................................................................................ 6

2.6.2 Application limits ..................................................................................................... 7

2.7 Bill of material .................................................................................................................... 7

2.8 P&I diagrams ..................................................................................................................... 8

2.8.1 ZXME units ............................................................................................................. 8

2.8.2 ZXLE units .............................................................................................................. 9

2.8.3 ZXDE units ........................................................................................................... 10

2.9 Main components description .......................................................................................... 11

2.9.1 Compressor .......................................................................................................... 11

2.9.2 Condenser fan(s) .................................................................................................. 11

2.9.3 Housing ................................................................................................................ 11

2.10 XCM25D Electronic controller – Features ....................................................................... 12

2.10.1 Description ........................................................................................................... 12

2.10.2 Functionalities ...................................................................................................... 13

2.10.3 Modbus communication ....................................................................................... 13

2.10.4 Main control & safety features .............................................................................. 14

2.10.5 Additional features for customization ................................................................... 15

2.11 XCM25D Electronic controller – Programming ................................................................ 20

2.11.1 Programming the local display ............................................................................. 20

2.11.2 Remote display CCM60 ....................................................................................... 21

2.11.3 Single commands ................................................................................................. 21

2.11.4 Double commands – Entering programming level 1 "Pr1" ................................... 22

2.11.5 How to program the parameters (Pr1 and Pr2) .................................................... 22

2.11.6 Entering programming level 2 "Pr2" ..................................................................... 22

2.11.7 Fast access menu ................................................................................................ 23

2.12 Controller keyboard .......................................................................................................... 23

2.12.1 How to lock the keyboard ..................................................................................... 23

2.12.2 How to unlock the keyboard ................................................................................. 23

2.13 Parameters level 1 – Required settings ........................................................................... 24

C6.1.6/1017-1219/E

2.14 Digital operation ............................................................................................................... 24

2.15 Pumpdown mode ............................................................................................................. 25

2.15.1 External pumpdown without XCM25D integration (not available on ZXDE units) 25

2.15.2 Pumpdown by the unit controller (not available on ZXDE units) .......................... 25

2.15.3 Pumpdown with room thermostat (not available on ZXDE units)......................... 26

2.15.4 Internal pumpdown with temperature sensor (case temperature) ....................... 26

2.16 Reset to factory settings – Emerson "Hot Key" ............................................................... 28

2.16.1 How to save factory settings or user settings ...................................................... 28

2.16.2 Applicable hot key for ZX units with XCM25D controller ...................................... 28

2.16.3 Location of the "Hot Key" plug connection on the XCM25D controller ................ 28

2.16.4 How to program a "Hot Key" from the controller (upload) .................................... 28

2.16.5 How to program a controller using an Emerson "Hot Key" (download) ............... 29

2.17 Troubleshooting – Alarm history ...................................................................................... 29

2.18 Compressor motor protection .......................................................................................... 30

2.19 System pressure protection ............................................................................................. 30

2.19.1 High-pressure safety switch ................................................................................. 30

2.19.2 High pressure: pressure relief valve ..................................................................... 30

2.19.3 Low-pressure safety switch – Optional ................................................................ 30

2.20 Other inputs of the XCM25D controller ............................................................................ 30

2.20.1 Customer-supplied control (room thermostat)...................................................... 30

2.20.2 Case temperature controller ................................................................................. 30

2.20.3 Ambient temperature sensor ................................................................................ 31

2.21 Alarm output (DO5) of the XCM25D controller ................................................................ 31

3 Installation ....................................................................................................... 32

3.1 Condensing unit handling ................................................................................................ 32

3.1.1 Transport and storage .......................................................................................... 32

3.1.2 Weights................................................................................................................. 32

3.2 Refrigeration piping connections ..................................................................................... 32

3.2.1 Refrigeration piping installation ............................................................................ 32

3.2.2 Brazing recommendations.................................................................................... 34

3.2.3 Brazing procedure ................................................................................................ 34

3.3 Electrical connection ........................................................................................................ 35

3.3.1 Power supply connections.................................................................................... 35

3.3.2 Maximum operating currents for cable selection ................................................. 35

3.3.3 Electrical wiring .................................................................................................... 36

3.3.4 Electrical protection standard (protection class) .................................................. 36

3.3.5 Main fuses ............................................................................................................ 36

3.4 Location & fixings ............................................................................................................. 37

4 Start-up & operation ........................................................................................ 39

4.1 Evacuation ....................................................................................................................... 39

4.2 Charging procedure ......................................................................................................... 39

C6.1.6/1017-1219/E

4.2.1 Refrigerant charging procedure ........................................................................... 39

4.2.2 Oil charging procedure ......................................................................................... 40

4.2.3 Oil separator ......................................................................................................... 40

4.3 Rotation direction of Scroll compressors ......................................................................... 40

4.4 Maximum compressor cycle ............................................................................................ 41

4.5 Checks before starting & during operation ...................................................................... 41

5 Maintenance & repair ...................................................................................... 42

5.1 Replacing a compressor .................................................................................................. 42

5.2 Condenser fins ................................................................................................................. 42

5.3 Electrical connections ...................................................................................................... 42

5.4 Routine leak testing ......................................................................................................... 43

5.5 Condenser fan(s) & motor(s) ........................................................................................... 43

6 Certification & approval .................................................................................. 43

7 Dismantling & disposal ................................................................................... 43

DISCLAIMER ............................................................................................................... 43

Appendix 1: Overview of the ZX unit components ................................................... 44

Appendix 2: Wiring diagram – ZXME / ZXLE / ZXDE units (380-420V / 3 Ph / 50 Hz)45

Appendix 3: Wiring diagram – ZXME / ZXLE units (230V / 1 Ph / 50 Hz) ................. 46

Appendix 4: Parameters level 1 ................................................................................. 47

Appendix 5: Alarm menu ............................................................................................ 48

Appendix 6: Additional features for customization .................................................. 53

Appendix 7: Temperature / resistance curve for B7 Sensor (customer option) ..... 57

Appendix 8: List of tables and figures ...................................................................... 58

C6.1.6/1017-1219/E 1

About these guidelines

The purpose of these application guidelines is to provide guidance in the application of Copeland
EazyCool™ ZX outdoor refrigeration condensing units. They are intended to answer the questions
raised while designing, assembling and operating a system with these products.

Besides the support they provide, the instructions listed herein are also critical for the proper and
safe functioning of the condensing units. The performance and reliability of the product may be
impacted if the product is not used according to these guidelines or is misused.

These application guidelines cover stationary applications only. For mobile applications, contact
Application Engineering as other considerations may apply.

1 Safety instructions

Copeland EazyCool™ ZX outdoor refrigeration condensing units are manufactured according to the
latest European safety standards. Particular emphasis has been placed on the user's safety.

These condensing units are intended for installation in machines and systems according to the
Machinery Directive MD 2006/42/EC. They may be put to service only if they have been installed in
these systems according to instructions and conform to the corresponding provisions of legislation.
For relevant standards please refer to the Manufacturer’s Declaration, available at

www.climate.emerson.com/en-gb.

These instructions should be retained throughout the lifetime of both the compressor and the
condensing unit.

You are strongly advised to follow these safety instructions.

1.1 Icon explanation

WARNING

This icon indicates instructions to
avoid personal injury and material
damage.

CAUTION
This icon indicates instructions to avoid
property damage and possible
personal injury.

High voltage
This icon indicates operations with a
danger of electric shock.

IMPORTANT
This icon indicates instructions to avoid
malfunction of the compressor.

Danger of burning or frost burn
This icon indicates operations with a
danger of burning or frost burn.

NOTE

This word indicates a recommendation
for easier operation.

Explosion hazard
This icon indicates operations with a
danger of explosion.

1.2 Safety statements

▪ Refrigerant compressors must be used in accordance with their intended use.
▪ Only qualified and authorized HVAC or refrigeration personnel are permitted to install,

commission and maintain this equipment.

▪ Electrical connections must be made by qualified electrical personnel.
▪ All valid standards for connecting electrical and refrigeration equipment must be

observed.

▪ The national legislation and regulations regarding personnel protection must be

observed.

Use personal safety equipment. Safety goggles, gloves,

protective clothing, safety boots and hard hats should be worn where
necessary.

2 C6.1.6/1017-1219/E

1.3 General instructions

WARNING
System breakdown! Personal injuries! Never install a system in the field

and leave it unattended when it has no charge, a holding charge, or with the
service valves closed without electrically locking out the system.
System breakdown! Personal injuries! Only approved refrigerants and
refrigeration oils must be used.

WARNING
High shell temperature! Burning! Do not touch the compressor until it has

cooled down. Ensure that other materials in the area of the compressor do not
get in touch with it. Lock and mark accessible sections.

CAUTION
Overheating! Bearing damage! Do not operate compressors without

refrigerant charge or without being connected to the system.

CAUTION
Contact with POE! Material damage! POE lubricant must be handled

carefully and the proper protective equipment (gloves, eye protection, etc.)
must be used at all times. POE must not come into contact with any surface
or material that it might damage, including without limitation, certain polymers,
eg, PVC/CPVC and polycarbonate.

IMPORTANT
Transit damage! Compressor malfunction! Use original packaging. Avoid

collisions and tilting.

The contractor is responsible for the installation of the unit and should check the following points:
▪ Sufficient liquid sub-cooling in the line to the expansion valve(s) to avoid "flash-gas" in the liquid

line;

▪ Sufficient amount of oil in the compressor (in case of long piping additional oil must be charged).

C6.1.6/1017-1219/E 3

2 Product description

2.1 General information about Copeland EazyCool™ ZX condensing units

Emerson has developed the Copeland EazyCool™ ZX outdoor condensing unit of second generation
to meet primarily the demands of the food retail and food service sectors. It is a refrigeration air­cooled condensing unit that uses the latest Copeland™ brand products patented Scroll technology
as the main driver and has electronic protection and diagnostics features built in the compact chassis.
The combination of large condensers and low speed fans allows for particularly quiet operation.

2.2 EU Ecodesign Directive 2009/125/EC

The European Directive 2009/125/EC with regard to ecodesign requirements for professional
refrigerated storage cabinets, blast cabinets, condensing units and process chillers requires
manufacturers to decrease the energy consumption of their products by establishing minimum
energy efficiency standards. Copeland™ brand products condensing units are prepared and
optimized to meet the requirements of the Ecodesign Directive. The integrated variable speed fan
and condenser reduce the noise level and energy consumption significantly. This, combined with
Copeland scroll technology, allows for high-efficiency operation.

For the rated cooling capacity, rated power input and rated COP value please refer to Copeland™
brand products Select software at www.climate.emerson.com/en-gb.

These guidelines meet the requirements of Regulation 2015/1095, Annex V, section 2(a), with regard
to product information, namely:

▪ (v) ➔ See chapter 2.6 "Application range"
▪ (vi) ➔ See chapters 5.2 "Condenser fins" and 5.4 "Routine leak testing"
▪ (vii) ➔ See chapters 2.10.4 "Main control & safety features" and 4.2 "Charging procedure"
▪ (viii) ➔ See chapter 7 "Dismantling & disposal"

2.3 Main product features

Copeland EazyCool ZX condensing units are released for multiple refrigerants. They are available in
two cabinet sizes and are equipped with one or two fans.

Depending on the compressor in use they are designed for medium-temperature or low-temperature
refrigeration applications.

4 C6.1.6/1017-1219/E

Unit

Refrigerant

types

Displacement

@ 50 Hz

[m3/h]

Cooling

capacity*

[kW]

Nominal

power

[kW]

Rated

current

[A]

PS

high side

[bar]

PS

low side

[bar]

Medium temperature standard

TFD

PFJ

ZXME020E

R404A, 407A,
R407F, R507,

R448A, 449A

R134a,

R450A

& R513A

5.9

3.42

1.58

5.4

13.3

28.8

21

ZXME025E

6.7

3.89

1.66

5.2

12.9

ZXME030E

8.6

5.05

2.28

7.7

16.9

ZXME040E

11.7

6.58

3.29

10.8

24.0

ZXME050E

14.4

8.77

3.79

13.8

ZXME060E

17.1

10.05

4.41

14.1

ZXME075E

18.8

11.6

5.07

15.0

Medium temperature Digital

TFD

ZXDE030E

R404A,
R407A,

R407F, R507,

R448A, R449A

R134a, R450A

& R513A

8.3

5.13

2.21

7.2

ZXDE040E

11.4

7.21

2.72

8.9

ZXDE050E

14.4

8.65

3.67

12.3

ZXDE060E

17.1

10.1

4.46

12.4

ZXDE075E

18.8

11.4

4.83

15.0

Low temperature standard

TFD

PFJ

ZXLE020E

R404A, 407A,
R407F, R507,

R448A,

R449A

6.1

1.46

1.77

6.2

14.1

ZXLE025E

7.1

1.81

2.00

16.1

ZXLE030E

8.0

2.06

2.17

7.2

18.3

ZXLE040E

12.7

3.16

3.72

9.7

ZXLE050E

14.4

3.62

4.00

12.9

ZXLE060E

17.1

4.56

5.33

14.7

ZXLE075E

18.8

5.11

5.31

15.6

* Operating conditions for ZXDE, ZXME: R448A/R449A; Tevap = -10°C; Tamb = 32°C; suction gas = 20°C
* Operating conditions for ZXLE: R448A/R449A; Tevap = -35°C; Tamb = 32°C; suction gas = 20°C

Table 1: ZX condensing unit technical data

Unit

Outer dimensions

length/width/height with

closed cover [mm]

Net weight

[kg]

Fan

number

Liquid

receiver size

[litres]

Medium temperature standard

ZXME020E

424 / 1027 / 840

76

1

4.1

ZXME025E

79

ZXME030E

79

ZXME040E

91

ZXME050E

424 / 1029 / 1244

108

2

5.9

ZXME060E

112

ZXME075E

118

Medium temperature Digital

ZXDE030E

424 / 1027 / 840

82 1 4.1

ZXDE040E

424 / 1029 / 1244

104

2

5.9

ZXDE050E

108

ZXDE060E

112

ZXDE075E

118

Low temperature standard

ZXLE020E

424 / 1027 / 840

79

1

4.1

ZXLE025E

81

ZXLE030E

81

ZXLE040E

93

ZXLE050E

424 / 1029 / 1244

106

2

5.9

ZXLE060E

116

ZXLE075E

126

Table 2: ZX condensing unit features

C6.1.6/1017-1219/E 5

The figures hereafter show the overall physical dimensions of the ZX condensing units in millimetres:

Figure 1: Dimensions of models ZXME020E to ZXME040E, ZXDE030E and ZXLE020E to ZXLE040E (single-fan units)

Figure 2: Dimensions of models ZXME050E to ZXME075E, ZXDE040E to ZXDE075E and ZXLE050E to ZXLE075E
(dual-fan units)

2.4 Product nameplate

The condensing unit nameplate shows model designation and serial number, as well as locked rotor
amps, maximum operating current, safety pressures and weight.

The compressor has its own nameplate with all electrical characteristics.

6 C6.1.6/1017-1219/E

2.5 Nomenclature

The model designation contains the following technical information about the condensing unit:

Figure 3: Nomenclature ZX units

2.6 Application range

2.6.1 Qualified refrigerants and oils

Qualified

refrigerants

R404A, R407A, R407F, R507, R448A, R449A

R134a*, R450A*, R513A* (* = Not for ZXLE)

Qualified

servicing

oils

Emkarate RL 32 3MAF
Mobil EAL Arctic 22CC

Oil charge

in litres

ZXME020E
ZXME025E

ZXME030E

ZXLE020E
ZXLE025E
ZXLE030E

ZXDE030E

ZXDE040E

ZXLE040E
ZXLE050E

ZXDE050E
ZXDE060E
ZXDE075E

ZXME040E
ZXME050E
ZXME060E
ZXME075E

ZXLE060E
ZXLE075E

1

1.1

1.24

1.75

1.77

1.85

2.3

Table 3: Qualified refrigerants and oils

WARNING
Use of R450A and R513A refrigerants! Risk of compressor damage!

Migration of R450A or R513A into the compressor crankcase could cause low
oil viscosity, which could lead to compressor damage. When using R450A or
R513A it is critical to meet the following requirements:

▪ maintain adequate superheat settings with a minimum superheat of 8-10K;
▪ no liquid refrigerant migration into the compressor at any time, especially

during standstill, during or after defrost, or after reverse mode for example
in heat pumps;

▪ pumpdown is recommended (not for Digital units);
▪ the use of a crankcase heater is mandatory;
▪ retrofit to R450A and R513A is only allowed for compressors which are

approved for these refrigerants.
Contact your local Application Engineering representative for any further
information.

NOTE: ZXDE & ZXLE units are equipped with an oil separator. This separator is pre-charged
with 0.5 liter of oil.

C6.1.6/1017-1219/E 7

2.6.2 Application limits

For application envelopes, please refer to the compressor application envelopes which can be found
in Copeland™ brand products Select software, available at www.climate.emerson.com/en-gb.

ZX condensing units can be used with an ambient temperature from -15°C to 45°C. For lower ambient
temperatures please contact your local Application Engineering representative.

2.7 Bill of material

BOM

Family

Introduction

date

Controller concept

Oil

separator

Suction

accumulator

302

ZXME

08/2008

Electronic main board

No

No

452

ZXLE

07/2010

Electronic main board

Yes

Yes

ZXDE

EC2-552 (Emerson - Alco)

Yes

No

303

ZXME

03/2013

Electronic main board

No

No

453

ZXLE

03/2013

Electronic main board

Yes

Yes

ZXDE

XC645 (Emerson - Dixell)

Yes

No

304

ZXME

01/2015

XCM25D (Emerson - Dixell)

No

No

454

ZXLE

01/2015

XCM25D (Emerson - Dixell)

Yes

Yes

ZXDE

Yes

No

Table 4: BOM history

NOTE: These guidelines are of application only for BOM 304 and 454. For previous
generations (BOM 302/452 & BOM 303/453) the dedicated guidelines can be downloaded from

www.climate.emerson.com/en-gb.

8 C6.1.6/1017-1219/E

2.8 P&I diagrams

2.8.1 ZXME units

Figure 4: P&I diagram for ZXME units

Position

Description

Comments

Fast access

menu

1 (M1)

High-efficiency Copeland Scroll compressor

2 (M2)

Condenser with 1 or 2 fans

3

Liquid receiver with service valve

4

Filter drier / sight glass combination

5 (Y1)

Expansion device for suction line injection

6

Service valve, suction line

7

Service valve, liquid line

PSL (S2)

Adjustable low-pressure switch (not factory­mounted)

System safety

(option)

PSH (S1)

Non-adjustable high-pressure switch

System safety

PTL (B1)

Suction pressure sensor, low pressure

Compressor setpoint

P1P

PTH (B2)

Pressure sensor, high pressure

Fan speed control

P2P

TT1 (B3)

Discharge temperature sensor

Compressor safety

P3t

TT2 (B6)

Ambient temperature sensor

Additional functions

P6t

Table 5: Legend of the P&I diagram for ZXME units

C6.1.6/1017-1219/E 9

2.8.2 ZXLE units

IMPORTANT
Absence of insulation on the liquid line in ZXLE units! Air moisture
condensation and lack of performance! Moisture will condensate on the

liquid line and cause water droplets. The liquid line can pick up additional heat
from the ambient which will adversely affect the sub-cooling desirable for the
liquid refrigerant before it enters the expansion valve. Both the suction and
liquid interconnecting piping between the ZX unit and the evaporator should
be insulated to avoid condensation.

Figure 5: P&I diagram for ZXLE units

Position

Description

Comments

Fast access

menu

1 (M1)

High-efficiency Copeland Scroll compressor

2

Oil separator

Pre-charged with 0.5 L

3

Check valve

4 (M2)

Condenser with 1 or 2 fans

5

Liquid receiver with service valve

6

Plate heat exchanger for enhanced vapour injection
(EVI)

7 (Y1)

Expansion device for enhanced vapour injection (EVI)

8

Filter drier / sight glass combination

9

Service valve, liquid line

10

Service valve, suction line

11

Liquid separator

PSL (S2)

Adjustable low-pressure switch (not factory mounted)

System safety (option)

PSH (S1)

Non-adjustable high-pressure switch

System safety

PTL (B1)

Suction pressure sensor, low pressure

Compressor setpoint

P1P

PTH (B2)

Pressure sensor, high pressure

Fan speed control

P2P

TT1 (B3)

Discharge temperature sensor

Compressor safety

P3t

TT2 (B6)

Ambient temperature sensor

Additional functions

P6t

TT3 (B4)

Vapour in temperature sensor

EVI control

P4t

TT4 (B5)

Vapour out temperature sensor

EVI control

P5t

Table 6: Legend of the P&I diagram for ZXLE units

10 C6.1.6/1017-1219/E

2.8.3 ZXDE units

Figure 6: P&I diagram for ZXDE units

Position

Description

Comments

Fast access

menu

1 (M1)

High-efficiency Copeland Scroll compressor
(ZBD for Digital)

2

Oil separator

Pre-charged with 0.5 L

3 (M2)

Condenser with 1 or 2 fans

4

Liquid receiver with service valve

5

Filter drier / sight glass combination

6

Service valve, liquid line

7

Service valve, suction line

PSL (S2)

Adjustable low-pressure switch (not factory
mounted)

System safety

(option)

PSH (S1)

Non-adjustable high-pressure switch

System safety

PTL (B1)

Suction pressure sensor, low pressure

Compressor setpoint

P1P

PTH (B2)

Pressure sensor, high pressure

Fan speed control

P2P

TT1 (B3)

Discharge temperature sensor

Compressor safety

P3t

TT2 (B6)

Ambient temperature sensor

Additional functions

P6t

Table 7: Legend of the P&I diagram for ZXDE units

C6.1.6/1017-1219/E 11

2.9 Main components description

2.9.1 Compressor

Medium temperature

Low temperature

Unit model

Compressor model

Unit model

Compressor model

Standard

ZXME020E

ZX15KCE-TFD/PFJ

ZXLE020E

ZXI06KCE-TFD/PFJ

ZXME025E

ZX19KCE-TFD/PFJ

ZXLE025E

ZXI08KCE-PFJ

ZXME030E

ZX21KCE-TFD/PFJ

ZXLE030E

ZXI09KCE-TFD/PFJ

ZXME040E

ZX29KCE-PFJ

or ZX30KCE-TFD

ZXLE040E

ZXI14KCE-TFD

ZXME050E

ZX38KCE-TFD

ZXLE050E

ZXI15KCE-TFD

ZXME060E

ZX45KCE-TFD

ZXLE060E

ZXI18KCE-TFD

ZXME075E

ZX51KCE-TFD

ZXLE075E

ZXI21KCE-TFD

Digital

ZXDE030E

ZBD21KCE-TFD

ZXDE040E

ZBD29KQE-TFD

ZXDE050E

ZBD38KQE-TFD

ZXDE060E

ZBD45KQE-TFD

ZXDE075E

ZBD48KQE-TFD

Table 8: Compressor models cross reference

2.9.2 Condenser fan(s)

The condensers of the ZX condensing units are equipped with single-phase fans.

Condensing units

Nr. of

fans

[pcs]

Fan

speed

[rpm]

Diameter

[mm]

Voltage

[V/ph/Hz]

Power

input

[W]

Medium temperature

Low

temperature

Standard

Digital

ZXME020E

ZXLE020E

1

830

450

220-240V /

1 Ph / 50 Hz

123

ZXME025E

ZXLE025E

ZXME030E

ZXDE030E

ZXLE030E

ZXME040E

ZXLE040E

ZXDE040E

2

246

ZXME050E

ZXDE050E

ZXLE050E

ZXME060E

ZXDE060E

ZXLE060E

ZXME075E

ZXDE075E

ZXLE075E

Table 9: Condenser fans technical data

2.9.3 Housing

ZX condensing units with BOM 304 & 454 have specific housing features:
▪ Controller-window in the cabinet door. The window is IP54 and shows the current value of the

electronic controller.

▪ The main power switch is installed on the cabinet door and allows to de-energize the unit without

opening the cabinet door. To open the door the main power switch must be in off position.

▪ The quick-locks allow for easy and quick opening of the cabinet door by means of the cabinet

key.

▪ The cabinet key is delivered with the unit. It is attached to one of the piping connections by means

of a cable strap.

12 C6.1.6/1017-1219/E

Figure 7: ZX unit housing

2.10 XCM25D Electronic controller – Features

The XCM25D controller is designed to be a powerful, flexible controller for use in multiple
applications. It has been developed for condensing units and allows the adjustment of all relevant
parameters by the user.

2.10.1 Description

WARNING
Electrical pins under voltage! Electrical shock hazard! There are unused

fast-on pins (C1 & DO2) on the XCM25D which could be under voltage. They
are covered by insulated fast-on flags in the factory. Handle carefully when
removing insulating flags during service on site.

The controller is designed for usage in an outdoor refrigeration unit. It is rated to be used for the
following environment:

▪ Outdoor controller ambient temperature for operation: -40C to 60C
▪ Ambient temperature for storage: -40C to 80C
▪ Maximum humidity: 90% at 48C (non-condensing)
▪ Board power: 24V AC +15%/-20%
▪ Voltage sensing capabilities - Single phase: 100-120, 200-240V AC ± 10%
▪ Voltage sensing capabilities - Three phase: 200-240, 380-460, 575V AC ± 10%

The units of measure are selectable. The factory default unit is [bar] (always considered relative) for
pressure and [°C] for temperature.

Figure 8: Electronic controller

C6.1.6/1017-1219/E 13

2.10.2 Functionalities

The controller allows for easy commissioning by the technician with the factory settings at the highest
program level. It also offers the possibility to make substantial changes to the system optimization in
further programming levels. Advanced functionalities can also be activated.

The following functions are covered by the controller:

▪ Condensing unit control
▪ Case control
▪ Condenser fan control
▪ Defrost
▪ Voltage and current sensing (compressor protection)
▪ Liquid and vapour injection
▪ System EXV control
▪ Digital compressor control
▪ Modbus/Canbus communication

NOTE: The XCM25D controller includes all the functions necessary for the control of the ZX
units. For additional functionalities please contact your local Application Engineering
representative.

Figure 9: XCM25D controller functionality overview

2.10.3 Modbus communication

The XCM25D controller can communicate via Modbus (RS-485) connection to provide all running
data. Additional commands can also be activated through Modbus connection. The Modbus map is
available on request from the Application Engineering department at Emerson.

A pre-configured X-Web Supervisor device is also available and allows easy handling and
connectivity with the XCM25D controller.

Figure 10: Modbus port and termination jumpers

NOTE: If the XCM25D controller is connected in chain the termination jumpers must be
removed.

Condenser fan
control

Digital Scroll

control (ZXDE)

Superheat

control EVI

(ZXLE)

Liquid injection

(ZXME)

Alarm

management

Electrical

protection

Monitoring of the discharge

line temperature

14 C6.1.6/1017-1219/E

2.10.4 Main control & safety features

Suction pressure control: Each unit is equipped with a suction pressure transmitter. The XCM25D
controls the suction pressure by evaluating the input signal of the pressure transmitter. When using
a digital unit (ZXDE), the setpoint (C16) and proportional band (C17) need to be adjusted. The suction
pressure regulation for ZXME or ZXLE units has to be defined by compressor cut-in (C01) and cut­out (C02) values. The signal of the suction pressure transmitter is also used for additional
functionalities, pumpdown and keeping the compressor running within the approved envelopes.

Condensing pressure control: Each unit is equipped with a high-pressure transmitter. The
XCM25D controls the condensing pressure by regulating the fan speed corresponding to the high­pressure transmitter signal. The unit controller can regulate the condensing pressure in two ways.
The first approach is to keep a constant condensing temperature. This mode is utilized by the factory
settings. The pre-adjusted setpoint is 27°C as a universal setting. If lower condensing pressure is
required set up the condenser setpoint (E39) to a lower value. The second control way is fan
modulation based on compressor envelope. This mode of setpoint control is only available if a suction
pressure input is not used. The parameter (E38) enables/disables the mode as needed. If this
function is unused, the condensing temperature setpoint will be set as a parameter (E39) value. The
compressor is allowed to run different minimum condensing temperatures based on the suction
pressure of the compressor. This is the most energy efficient way to minimize the condensing
temperature as much as possible.

Automatic liquid injection on ZXME: The electronic controller automatically instructs liquid
refrigerant to be injected into the suction line of the Scroll compressor to reduce discharge
temperatures generated when the unit operates at increasing compression ratios. The electronic
controller reacts automatically to a thermistor which is attached to the discharge line on all ZXME
units. The controller converts this signal for the linear stepper motor driving the liquid injection valve
to a position that enables the compressor to continue operating within its safe envelope.

Automatic enhanced vapour injection (EVI) on ZXLE: Control of an electronic expansion device
based on the superheat in the additional heat exchanger for the EVI Scroll compressor to create
subcooling in liquid refrigerant coming from the receiver. In case of excessive discharge line
temperatures (DLT) the superheat control is ignored and the controller will work in liquid injection
mode in order to reduce the discharge gas temperature.

NOTE: The ZXLE units have an additional subcooling of about 30K. This must be considered
when selecting the expansion device.

Compressor phase reversal: Ensures that the compressor keeps running in one direction only

(clockwise = right rotation) – necessary for a compliant Scroll compressor to compress and pump
refrigerant. Reset is automatic once the phase rotation is correct for the compressor.

Motor current overload protection: This feature eliminates the need for external current protection
for the compressor motor.

Fixed high-pressure switches: This is a non-adjustable protection device designed to prevent the
compressor from operating outside of its safe high-pressure range. Reset is automatic for a set
number of trips (7) then the unit will lock out and require manual restart. This feature is important to
prevent the ZX unit from cycling under these controls for a long period of time.

▪ ZXLE & ZXME units: 28 bar cut-out / 21 bar cut-in.
▪ ZXDE units: 28.8 bar cut-out / 24 bar cut-in.

Adjustable high-pressure limitation: The unit controller provides the possibility to stop the unit at
a required discharge pressure which is lower than the cut-out value of the fixed high-pressure switch.
Detailed instructions can be found in chapter 2.10.5 "Additional features for customization"
hereunder.

Discharge temperature protection: Each unit is equipped with a discharge line sensor (NTC). The
information from the NTC sensor is used to activate liquid injection when required. The XCM25D
controller will stop the compressor if discharge temperatures reach unacceptable levels.

Adjustable low-pressure alarm (from S/N 16EZ08855M onwards): The unit controller features an
adjustable low-pressure alarm managed by the suction pressure sensor. The factory setting of this
alarm is the lowest permitted pressure of the refrigerant with the lowest pressure-vapour properties.
If needed the user can modify this value according to the required application.

▪ ZXME & ZXDE units: 0.5 bar rel
▪ ZXLE units: 0.1 bar rel

C6.1.6/1017-1219/E 15

In case of very low cut-out pressure on ZXLE units it is possible that the suction pressure will get
lower than 0.1 bar rel due to the 5-second switching off delay. In this case the user can deactivate
the low-pressure alarm with parameter D13 or activate the alarm delay with parameter D12.

Option: Adjustable low-pressure switches PS1: This device protects the system against low
pressure operation. It must be adjusted depending on running conditions and potential special
requirements like pumpdown. The compressor envelopes published in Select must be respected at
all times. In case of controller breakdown, the low-pressure switch could be used for emergency
operation (rewiring required).

A crankcase heater is directly connected to the controller. The crankcase heater will be energized
when the ambient sensor is below a given value (10°C) and the compressor has been off for a period
of time (5 minutes). The minimum off time does not apply at initial power up.

In addition to the above, the ZX condensing unit has the following features:

▪ Liquid line assembly (filter drier and sight glass/moisture indicator)
▪ Anti-corrosion treatment to the condenser fins

The electronic controller is also the base controller for the connection of many optional and customer
supplied functions such as:

▪ Main load controller (or thermostat)
▪ Evaporator electric defrost heater contactor
▪ Evaporator fan contactor
▪ Superheat controller for one electronic expansion device (not available on ZXLE units)

2.10.5 Additional features for customization

A lot of additional features are provided by the XCM25D controller. In the European design of the
electrical panel a few of the additional functionalities are prearranged and can easily be installed by
connecting additional hardware to the electrical terminals. The tables in Appendix 6 show the
parameters that have to be changed in case a special feature of the controller should be activated.
The tables do not show the required settings which have to be done by the system operator, eg,
choosing correct setpoints for different components and different applications.

NOTE: After programming an additional function, the system will have to be restarted. To
engage system restart, switch off the main power supply, wait for 5 seconds and switch it on
again.

Component

Description

Prearranged terminals /
Wiring diagram

S2

Low pressure switch, optional; can be ordered
factory-installed.

Terminals: X1.2 / X1.7

Y3

Solenoid valve liquid line (not available on
ZXDE units)

Terminals: X1.N / X1.8

S3

Room thermostat for pumpdown or direct
control

Terminals: X1.9 / X1.10

Alarm contact

Sensor for evaporator or room

Terminals: X1.11 / X1.12

Sensor B7

Sensor for evaporator or room (NTC10kΩ)

Terminals: X1.13 / X1.14

Table 10: Prearranged additional connections

Figure 11: Prearranged additional connections

16 C6.1.6/1017-1219/E

NOTE: Depending on the required functionalities additional components might be necessary.
Please contact your local Application Engineering representative.

NOTE: Check the current limitations given by the controller relays.
NOTE: The solenoid valve function is not available on ZXDE units.

Digital output

Specifications

DO1, DO2 and DO3

Relay SPDT 16A, 250V AC

DO3

Relay SPST 8A, 250V AC

DO4 and DO5

Relay SPST 5A, 250V AC

Table 11: Digital output specifications

Temperature control by means of an external room thermostat (not available on ZXDE units)

The temperature of a cold room or cooling cabinet can be controlled by means of an external room
thermostat (Digital Input DI3, parameter R07).

The parameters that must be changed to control a cooling cabinet or a cold room with a room
thermostat are listed in Table 12 below.

With these settings the controller will switch the compressor according to the status of the connected
device (room thermostat):

▪ if the input is closed, turn the compressor on (On-Off-compressor)
▪ if the input is open, turn the compressor off (On-Off-compressor)

Parameter

Description

Factory settings

Recommended settings /
Comments

C05

Compressor
regulation probe
selection

1 = Suction pressure
probe = SuP

Suction pressure switch / Room
thermostat input = 3 = diS

G56

Use the liquid line
solenoid

NO

NO >> If a solenoid is used in the
liquid line, see Chapter 2.15
"Pumpdown mode" for parameter
settings

R07

Digital Input 3
function

0 = Not used = nu

Suction pressure switch / Room
thermostat input = 1 = SuS

R08

Digital Input 3
polarity

1 = Closed = CL

1 = Closed = CL (no change)

Table 12: External room thermostat - Parameters

Temperature control by means of an external temperature probe (not recommended for ZXDE
units)

The temperature of a cold room or cooling cabinet can be controlled by means of an additional
temperature (Analog Input AI7, component B7 in wiring diagram) probe (NTC, 10kΩ - for detailed
temperature-resistance-curve, see Appendix 7). The probe can be located in the evaporator or in
the room. The location of the probe has to be considered for the configuration of the P7C/A19 setting.
Based on the value provided by the B7-temperature sensor the compressor will be switched on and
off according to the following graphics:

Figure 12: External temperature sensor – Functionality

C6.1.6/1017-1219/E 17

The following parameters must be adjusted to control a cooling cabinet or a cold room with a
temperature sensor:

Parameter

Description

Factory settings /
Range

Recommended settings / Comments

A19

Probe 7
configuration

0 = Not used = nu

Thermostat temp (NTC10K) = 2 = tnt or
Evaporator temp (NTC10K) = 5 = EPt

C05

Compressor
regulation probe
selection

1 = Suction pressure
probe = SuP

Case temperature = 2 = CSt

G01

Case temperature
probe selection

0 = Not used = nu

Thermostat temperature = 4 = tnt or
Evaporator temperature = 5 = EPt

G02

Setpoint case
temperature

2°C

Choose setpoint according to requirements
of cooled goods

G03

Position differential
case temperature

1K / 0.1 to 25.5K

Setpoint G02 + positive differential G03
results in cut-out value for compressor

G04

Case temperature
lower limit G02

-10°C / -40°C to G05

Define limits to avoid wrong operator settings
for G02

G05

Case temperature
upper limit G02

+15°C / G04 to 110°C

Define limits to avoid wrong operator settings
for G02

G06

Emergency run on­time

2 min / 0 to 255 min

In case of probe failure, the compressor will
cycle for a time defined by G06 & G07

G07

Emergency run off­time

1 min / 0 to 255 min

In case of probe failure, the compressor will
cycle for a time defined by G06 & G07

Table 13: External temperature sensor – Parameters

Please check that G56 is set to "NO" (means "no solenoid valve in the liquid line") and no additional
digital inputs are configured (Digital Input DI3; Parameter R07 has to be set to "not used" = nu = 0).

Adjustable discharge pressure limitation

The controller has dedicated parameters to provide the possibility of adjustable discharge pressure
cut-out.

Parameter

Description

Factory settings

Recommended

settings

E58

Condenser temperature / Pressure
threshold for high alarm

27

Required value

E61

Condenser temperature / Pressure
threshold for alarm recovery

23

Required value

Table 14: Discharge pressure limitations

Low ambient operation

Very low ambient temperatures can result in malfunction of expansion devices because of insufficient
pressure difference. Therefore, pressure cut-out during system start-up can occur. For proper
operation of the expansion devices, the unit running time must allow to build up sufficient condensing
pressure.

At low ambient conditions, the compressor will need to run for a minimum period of time to allow the
system pressures to stabilize. If the unit operates below a defined ambient temperature (ambient
temp. < C12) or if the ambient sensor has failed, the compressor should run for a set period of time
(C14) when it is started based on a low suction reading.

The unit will be turned on for the minimum run time in the following cases:

▪ a room thermostat input is closed
▪ the case temperature setting cut-in is reached
▪ the low-pressure input is closed,

The unit will start in any of these cases even if parameter G56 is set to true, ie, the thermostat or
case temperature controls the liquid line solenoid.

If the pressure drops below the cut-out value or the low-pressure input opens, the unit should
continue to run for the remaining minimum on time (C14) or until a satisfactory condenser pressure
is reached (C13).

18 C6.1.6/1017-1219/E

If a suction pressure transducer is present and the suction pressure falls below a given value (C15)
during the minimum on time (C14), then disregard the timer and shut the compressor off to protect
against vacuum operation.

Defrost

The XCM25D is able to control defrost on evaporators. The controller can handle electrical defrost
or natural / fan defrost (select with parameter G17). The defrost probe (parameter G12) provides the
XCM25D with information about the temperatures in the evaporator.

The intervals between defrost cycles are controlled by parameter G23. This can be done based on
the integrated real-time clock or by fixed intervals.

The following parameters must be adjusted to control defrost in a cooling cabinet or a cold room:

Parameter

Description

Factory settings /
Range

Recommended settings / Comments

A19

Probe 7
configuration

0 = Not used = nu

Evaporator temp (NTC10K) = 5 = EPt

G12

Defrost probe
selection

0 = Not used = nu

5 = Evaporator temperature sensor = EPt

G17*

Defrost type

0 = Electrical = EL

0 = Electrical = EL; 1 = Hot gas defrost = in;
2 = Natural defrost (pulse defrost) = PLS

G18

Interval between
defrost cycles

4 hours

0 to 120 hours range; adjust to individual
requirements

G19

Maximum duration
of defrost

20 minutes

0 to 255 minutes; adjust to individual
requirements

G20

Duration of pulse
defrost

15 minutes

0 to G19

G21

Defrost termination
temperature

10°C

-40°C to 110°C

G22

Defrost delay time

15 minutes

0 to 255 minutes

G23**

Defrost interval
mode

0 = Not used = nu

0 = nu = Not used; 1 = in = Interval;
2 = rtC = Real time clock

G24***

Display during
defrost

DEFROST "dEF"

0 = dEF = Defrost;
1 = Set = Case temperature setpoint;
2 = it = Case temperature value;
3 = rt = Standard operation

G25

Maximum display
delay after defrost

0 minute

0 to 255 minutes

G26

Drip time

1 minute

0 to 120 minutes

G27

Defrost at power­on

0 = NO

Avoids defrost after initial power up. If "YES",
the controller will decide on defrost-related
parameters if a defrost sequence is required
after initial start-up

G28

Workday defrost
start 1

00:00

00:00 – 23:50 or nu = Not used

G29

Workday defrost
start 2

04:00

00:00 – 23:50 or nu = Not used

G30

Workday defrost
start 3

08:00

00:00 – 23:50 or nu = Not used

G31

Workday defrost
start 4

12:00

00:00 – 23:50 or nu = Not used

G32

Workday defrost
start 5

16:00

00:00 – 23:50 or nu = Not used

G33

Workday defrost
start 6

20:00

00:00 – 23:50 or nu = Not used

G34

Holiday defrost
start 1

00:00

00:00 – 23:50 or nu = Not used

G35

Holiday defrost
start 2

04:00

00:00 – 23:50 or nu = Not used

C6.1.6/1017-1219/E 19

Parameter

Description

Factory settings /
Range

Recommended settings / Comments

G36

Holiday defrost
start 3

08:00

00:00 – 23:50 or nu = Not used

G37

Holiday defrost
start 4

12:00

00:00 – 23:50 or nu = Not used

G38

Holiday defrost
start 5

16:00

00:00 – 23:50 or nu = Not used

G39

Holiday defrost
start 6

20:00

00:00 – 23:50 or nu = Not used

G40

First weekly
holiday

SUN = Sunday

0 = SUN; 1 = MON; 2 = TUE; 3 = WED;
4 = THU; 5 = FRI; 6 = SAT;
7 = nu = Not used

G41

Second weekly
holiday

SUN = Sunday

0 = SUN; 1 = MON; 2 = TUE; 3 = WED;
4 = THU; 5 = FRI; 6 = SAT;
7 = nu = Not used

G42****

Fan operating
mode

0 = cn = Stopped
during defrost

0 = cn; 1 = On; 2 = cy; 3 = Oy

G43

Fan stop
Temperature

0°C

-40°C to 110°C

G55

Fan delay after
defrost / drip time

1 minute

0 to 255 minutes

S05

Relay output 2
configuration

0 = Not used = nu

6 = Defrost = dEF

Table 15: Defrost parameters

* G17 parameter >> Three defrost modes are available:

▪ G17 = EL → Defrost through electrical heater Compressor Off
▪ G17 = pulse → Pulse / natural defrost Compressor Off

** G23 parameter >> Defrost interval mode:

▪ G23 = nu (0) → Defrost functionality not used
▪ G23 = in (1) → Defrost in intervals G18
▪ G23 = rtC (2) → Enables defrost for rtC (real time clock), allows timing of defrost cycles

with G28 – G41

*** G24 parameter >> Display during defrost:

▪ G24 = dEF (0) → Display shows "dEF" for defrost
▪ G24 = SET (1) → Display shows "G02" parameter value = Case temperature setpoint
▪ G24 = it (2) → Display shows display case temperature value
▪ G24 = rt (3) → Display will stay in standard operation

**** G42 parameter >> Evaporator fans function:

▪ G42 = cn (0) → Will switch On and Off with the compressor, Off during defrost
▪ G42 = On (1) → Fans On, even if the compressor is off, Off during defrost

o After defrost, there is a timed fan delay allowing for drip time, set by means of the

"G55" parameter.

▪ G42 = cy (2) → Fans will switch On and Off with the compressor, On during defrost
▪ G42 = Oy (3) →Fans will run continuously also during defrost

Manual defrost

Please check settings for evaporator fans. The XCM25D controller can also control the evaporator
fans during manual defrost.

NOTE: For additional features please contact your local Application Engineering
representative.

20 C6.1.6/1017-1219/E

2.11 XCM25D Electronic controller – Programming

CAUTION
Low refrigerant charge! Compressor damage! Never energize the

unit/controller without minimum refrigerant system charge. There is a risk of
malfunction of the controller in deep vacuum operation which can cause
compressor damage.

2.11.1 Programming the local display

Figure 13: Local display

LED

Mode

Function

On

Compressor 1 enabled

Flashing

Anti-short cycle delay enabled

On

Condensing fans enabled

On

Bar display

Flashing

Programming mode

On

PSI display

Flashing

Programming mode

On

When browsing the service menu

Flashing

In fast access menu

On

When browsing the alarm menu

Flashing

A new alarm occurred

On

An alarm is occurring

On

Digital unloader solenoid On

On

In defrost

On

Evaporator fans - Liquid line solenoid valve On

Table 16: LED functions description

NOTE: By default, the local display will show the value of the suction pressure during
operation. This can be changed by choosing another value for parameter B03 (Remote
Display visualization).

Setting for

B03

Value shown on the display

Comments

0

P1 value = Suction pressure

1

P2 value = Mid-coil temperature (condenser)

2

P3 value = Discharge line temperature

3

P4 value = Vapour inlet EVI

Only for ZXLE

4

P5 value = Vapour outlet EVI

Only for ZXLE

5

P6 value = Ambient temperature

6

P7 value = Not used in factory setting

7

PEr value = Probe error

8

Aou value = Analog output

Table 17: Display visualisation

C6.1.6/1017-1219/E 21

2.11.2 Remote display CCM60

This device allows for remote monitoring and control of the XCM25D controller via cable. The CCM60
has the same interface as the XCM25D controller therefore the commands and symbols are identical.
The remote display shall be mounted on a vertical panel, in a 29 x 71 mm hole, and secured using
the special bracket supplied (see Figure 14).

The temperature range allowed for correct operation is 0°C to +60°C.
Avoid places subject to strong vibrations, corrosive gases, excessive dirt or humidity. Allow for air to

circulate through the cooling holes.
When front-mounted, the remote display is IP65 rated.

Figure 14: Remote display front panel mounting

The remote display is a proprietary bus of communication for Dixell HMI (x-rep, CCM60) interfaces.
There are two connection terminals on the back of the remote display (+ and -).

NOTE: Emerson recommends using a shielded cable twisted pair 2 x 0.5mm².

The device must be connected to the VNR-terminal on the unit controller according to the polarity.

Figure 15 shows the VNR terminal on the unit controller.

Figure 15: VNR connection for the remote display

Before connecting cables make sure the power supply complies with the hardware requirements.
Separate the terminal cables from the power supply cables, the outputs and the power connections.

2.11.3 Single commands

Press the SET button to display the target setpoint. In programming mode, this
allows to select a parameter or to confirm an operation.

Press the RESET button and hold for 5 seconds to reset any lockouts if the
current state of the controller allows for it to be reset.

(UP) To view the fast access menu. In programming mode, this browses the
parameter codes or increases the displayed value.

(DOWN) In programming mode, this browses the parameter codes or decreases
the displayed value.

(SERVICE) To enter the service and alarm menu.

Hold for 3 seconds to start a manual defrost or terminate an active defrost.

Table 18: Single commands

VNR connection

22 C6.1.6/1017-1219/E

2.11.4 Double commands – Entering programming level 1 "Pr1"

Press simultaneously for about 3 seconds to lock (PoF) or unlock (Pon) the
keyboard.

Press simultaneously to leave the programming mode or menu. On submenus
rtC and EEV this combination allows to go back to the previous level.

Press simultaneously for about 3 seconds to access the first level of
programming mode.

Table 19: Double commands

The device provides 2 programming levels:

▪ Pr1 with direct access
▪ Pr2 protected with a password (intended for experts)

2.11.5 How to program the parameters (Pr1 and Pr2)

Access pre-

program level

Press simultaneously for about 3 seconds to access the pre­programming level. The message rtC (real time clock) appears.

Access

program level

or

Press the Up or Down key until the message Par appears.

Access Pr1

Press the SET button to enter the program level. First parameter
C01 appears.

Select item

or

Select the parameter or submenu using the arrows.

Show value

Press the SET button.

Modify

or

Use the arrows to modify the value.

Confirm and

store

Press the SET button: the value will blink for 3 seconds, then the
display will show the next parameter.

EXIT

Press simultaneously to exit the programming mode, or wait
for 30 seconds (MTO) without pressing any key.

Table 20: Programming level 1 parameters

When entering the programming level for the first time the display will show the rtC (real time clock)
label.

▪ Press to access parameters N01/02/03/04/05 to adjust time & date. For further details, see

Chapter 2.13 "Parameters level 1 – Required settings".

▪ Press or to change from the rtC label to the Par label, in order to access the programming

level 1.

▪ Press : the parameters of programming level 1 can be changed.

2.11.6 Entering programming level 2 "Pr2"

To enter the Pr2 programming menu:

▪ Press simultaneously for 3 seconds. The first parameter label will be displayed.
▪ Press till the T18 label is displayed, then press the key;
▪ The blinking PaS label will be displayed; wait for a few seconds;
▪ The display will show "0 - -" with blinking 0: insert the password [321] using the and keys

and confirming with the key.

C6.1.6/1017-1219/E 23

2.11.7 Fast access menu

This menu contains the list of probes and some values that are automatically evaluated by the board
such as the superheat and the percentage of valve opening.

"nP" or "noP" stands for "probe not present" or "value not evaluated", "Err" means "value out of
range" or "probe damaged, not connected or incorrectly configured".

Entering fast access
menu

Press and release the UP arrow. The duration of the
menu in case of inactivity is 3 minutes.
The values that will be displayed depend on the
configuration of the board.

Use the
or

arrow to select
an entry, then

press
to see the value
or to go on with
another value.

▪ P1P: Pressure value of the P1 probe (suction pressure)
▪ P2t: Temperature value of the P2 probe (not valid)
▪ P2P: Pressure value of the P2 probe (discharge pressure)
▪ P3t: Temperature value of the P3 probe (discharge line

temperature)

▪ P4t: Temperature value of the P4 probe (vapour in only for ZXLE)
▪ P5t: Temperature value of the P5 probe (vapour out only for ZXLE)
▪ P6t: Temperature value of the P6 probe (ambient temperature)
▪ P7t: Temperature value of the P7 probe (free)
▪ SH: Value of superheat. nA = not available
▪ oPP: Percentage of step valve opening.
▪ LInJ: Status of the liquid line solenoid ("On" – "Off"). This information

is available only if one relay is set as "Liquid Line Solenoid".

▪ SEtd: Value of the dynamic setpoint (condenser fan SET). This

information is available only if the dynamic setpoint function is

enabled.

▪ AOO: Percentage of the analog output (0-10V or TRIAC PWM

Mod.). This information is available only if the 0-10V or TRIAC PWM

Mod. is enabled.

▪ dStO: Percentage of the PWM output driving the valve of the Digital

Scroll compressor.

▪ L°t: Minimum room temperature.
▪ H°t: Maximum room temperature.
▪ HM: Menu.

▪ tU1: Voltage reading V1 (not valid in standard configuration)
▪ tU2: Voltage reading V2 (not valid in standard configuration)
▪ tU3: Voltage reading V3 (not valid in standard configuration)
▪ tA1: Current reading I1
▪ tA2: Current reading I2

Exit

Press simultaneously or wait for the timeout of about
60 seconds

Table 21: Fast access menu

2.12 Controller keyboard

2.12.1 How to lock the keyboard

Keep the and keys pressed simultaneously for more than 3 seconds. The "PoF" message
will be displayed and the keyboard will be locked. At this point it is only possible to see the setpoint
or the maximum or minimum temperatures stored. If a key is pressed for more than 3 seconds, the
"PoF" message will be displayed.

2.12.2 How to unlock the keyboard

Keep the and keys pressed simultaneously for more than 3 seconds, till the "Pon" message
is displayed.

24 C6.1.6/1017-1219/E

2.13 Parameters level 1 – Required settings

The XCM25D is preconfigured to reduce the required settings on job-site to a minimum. In most
cases, it will not be necessary to enter programming level 2 "Pr2". Table 22 gives an overview of
the parameters available in programming level 1 "Pr1".

NOTE: When changing parameters C01 (Cin), C02 (CoU) and C05 (CPb) a reset of the
controller (interruption of power supply) is required.

Parameter

Description

Unit

Factory

settings

Comments

C01

Compressor cut-in pressure
setpoint

[bar]

4.0

Not used for

Digital ZXDE

C02

Compressor cut-out pressure
setpoint

[bar*]

2.0

Not used for

Digital ZXDE

C07

Refrigerant selection for
regulation

[-]

R404A

R22, R407A, R407F,

R507, R448A, R449A,

R134a, R407C

C16

Digital compressor setpoint

[bar*]

3.3

Not used for

ZXME & ZXLE

C17

Proportional band for compressor
regulation

[bar*]

2.0

Not used for

ZXME & ZXLE

C21

Cycle time for digital compressor

[sec]

10

Not used for

ZXME & ZXLE

C24

Minimum capacity for digital
compressor

[%]

20

Not used for

ZXME & ZXLE

C25

Maximum capacity for digital
compressor

[%]

100

Not used for

ZXME & ZXLE

D29

Low-pressure alarm value (from
S/N 16EZ08855M onwards)

[bar]

0.5

E39

Condenser setpoint

[°C]

35.0 E46

Regulation band of variable fan

[°C]

10.0 N01

Current minute

[-]

[-] N02

Current hour

[-]

[-]

N03

Day of the month

[-]

[-] N04

Month

[-]

[-] N05

Year

[-]

[-]

T18

Access to Pr2 level

[-]

[-]

Password: 3 2 1

* Pressure values are always relative

Table 22: Parameters in programming level Pr1

NOTE: The full list of parameters in programming levels 1 and 2 can be found in Technical
Information CC7.8.17 "Copeland EazyCool™ ZX Condensing Units – XCM25D Controller
Parameter List".

2.14 Digital operation

A Digital unit is able to operate in a part-load mode. Part-load operation is achieved by loading and
unloading of the Digital scroll compressor for certain periods of time (time cycles). The cycle of time
can be chosen between 10 and 30 seconds. Example: if the time cycle is 20 seconds at 50% of
capacity request, the compressor will run for 10 seconds loaded and 10 seconds unloaded. For
proper commissioning of the Digital unit the diagram in Figure 16 must be considered.

The regulation starts when the suction pressure (AI1) increases and reaches the value
(SP-PB/2+(PB*PMI)/100) or (C16-C17/2+(C17*C24)/100). Within the adjustment range
(SP-PB/2~SP+PB/2) or (C16–C17/2 ~ C16+C17/2) the Digital scroll compressor is activated in PWM
mode according to the value of the control variable.

When the pressure is higher than (SP + PB/2) or (C16 + C17/2) then the TRIAC output is at maximum
capacity. When the pressure is lower than (SP + PB/2) or (C16 + C17/2) but higher than (SP-PB/2)
the Digital Scroll compressor modulates the capacity according to the proportional band. If the
pressure is lower than (SP-PB/2)/ (C16-C17/2) the Digital Scroll compressor switches off.

C6.1.6/1017-1219/E 25

Figure 16: Digital operation

NOTE: When the digital valve on the compressor is discharged the compressor is loaded.
NOTE: At start-up the valve is energized for Sut/C20 start-up time, ie, time interval with the

digital valve energized before regulation starts. It ranges from 0 to 10 seconds.

2.15 Pumpdown mode

CAUTION
System pressure below atmospheric pressure! Compressor damage!

Never operate the system below atmospheric pressure. There is a risk of
malfunction of the controller in deep vacuum operation which can cause
compressor damage.

Pumpdown functionality is provided by the XCM25D controller for ZXME and ZXLE units only. It is
not released for Digital units ZXDE.

NOTE: Depending on the compressor and/or system design an increase of suction pressure
is possible when the unit stops. Therefore, pumpdown operation requires higher differences
between cut-in and cut-out setpoints. These values must be adjusted according to
application.

2.15.1 External pumpdown without XCM25D integration (not available on ZXDE units)

The easiest solution for pumpdown is to install a solenoid valve in the liquid line (not part of the
standard delivery) and to control it directly with the room thermostat or other external devices. The
settings on the unit for compressor cut-in and cut-out (C01 & C02) can easily be adjusted for
pumpdown. The disadvantage of this easy solution is that the controller is not informed that there is
a solenoid valve installed and therefore some protection features of the controller, eg, maximum
pumpdown time in case of blocked solenoid, will not work.

2.15.2 Pumpdown by the unit controller (not available on ZXDE units)

In case of pumpdown by the unit controller (available only for ZXME and ZXLE units) the user needs
to install a solenoid valve in the liquid line (not part of the standard delivery). In addition to the liquid
line solenoid valve a digital input signal from a room thermostat or a case temperature sensor must
be connected to the XCM25D. There are additional terminals available in the unit which allow for
easy connection of additional hardware if required. The wiring diagram also shows these optional
features. The liquid line solenoid valve Y3 can be connected on terminals X1.N & X1.8. The terminals
X1.9 & X1.10 can be used for a room thermostat (connected to DI3).

If a temperature sensor is preferred the analog input AI7 can be used (Caution: controller settings
are not preconfigured for temperature sensor). For details about alternative options please see
Chapters 2.15.3 "Pumpdown with room thermostat (not available on ZXDE units)" and 2.15.4
"Internal pumpdown with temperature sensor (case temperature)".

In any case there are limitations for the cut-out values of the compressors given by the envelopes.
The minimum cut-out settings are shown in Table 23 below. Those values are also applicable in
case pumpdown is carried out by means of an additional low-pressure switch. Operation of the unit
below the suction pressures shown in the table could result in tripping of the compressor internal
motor protector (Klixon, error code E28). The envelopes are in accordance with Select software
available at www.climate.emerson.com/en-gb.

26 C6.1.6/1017-1219/E

Unit family

R134a

R404A/R507

R407A

R407F

ZXME

-20°C = 0.3 bar rel

-20°C = 2 bar rel

-23°C* = 1.1bar rel

-25°C = 1 bar rel

ZXLE

[-]

-40°C = 0.3 bar rel

-40°C = 0 bar rel

-40°C = 0 bar rel

ZXDE

Not approved for pumpdown

* Limited to -20°C (1.35 bar rel) for ZXME020

Table 23: Minimum cut-out value for pumpdown

NOTE: ZXLE units have an additional 5-second switch-off delay which must be taken into
account for the pumpdown function.

NOTE: The values in the table show the lowest suction temperatures / pressures in the
envelopes. Depending on the condensing temperature in the real system it might be required
to adjust / increase the cut-out value according to the approved envelope published in Select.

2.15.3 Pumpdown with room thermostat (not available on ZXDE units)

Configure parameter C05 "Compressor regulation probe selection" to "3" (Suction pressure switch /
Room thermostat input). In addition, change setting for G56 from "0" to "1". This is information to the
controller that a solenoid valve is present.

Change the functionality of Digital Input 3 (DI3) (Parameter R07) to setting 1 (Suction pressure switch
/ Room thermostat input) and adjust the relay output configuration S07 to 7 (Liquid line solenoid).

Parameter

Factory settings

Pumpdown settings

C02

2 bar relative

Cut-out value for pumpdown, eg, 0.2 bar rel

C05

1 = Suction pressure probe =
SuP

3 = Suction pressure switch / Room thermostat =

diS

G11

3 minutes

Maximum pumpdown time

G56

0 = No

1 = Yes

R07

0 = Not used = nu

1 = Suction pressure switch / Room thermostat =

SuS

S07

0 = Not used = nu

7 = Liquid line solenoid = LLS

Table 24: Pumpdown 1

Room thermostat switch status

Liquid line solenoid valve status

Closed

Switch on / Energized

Open

Switch off / De-energized

Table 25: Pumpdown 2

For example, if the room thermostat switch is closed, the liquid line solenoid valve is activated, and
the compressor will run when the suction pressure value is higher than the compressor cut-in value
C01.

The liquid line solenoid valve will be switched off if the room thermostat switch is open and pumpdown
will start. The compressor will stop once the suction pressure value is lower than the compressor
cut-out value C02 or when the pumpdown duration is longer than the maximum pumpdown time G11
setting.

The functionality of parameter G11 protects the cooled goods in case of component damage, eg, the
liquid line solenoid is mechanically blocked and not able to stop refrigerant mass flow. In that case
the compressor cut-out pressure will not be reached and the compressor will continue to run. The
only limitation to stop the compressor is the maximum pumpdown time. G11 should be adjusted in a
way that, at all operating conditions, it allows pumpdown to compressor cut-out value C02 plus a
defined safety time, eg, 2 minutes.

2.15.4 Internal pumpdown with temperature sensor (case temperature)

It is also possible to carry out pumpdown functionality in case a temperature sensor is used for
temperature control (not part of the standard delivery). Parameters G56 and S07 have to be set up
as described in Chapter 2.15.3 "Pumpdown with room thermostat (not available on ZXDE units)".

The control of a cold room or cooling cabinet can be realized with a temperature sensor (change
parameter G01 according to the probe location). Parameter A19 must be set up as thermostat

C6.1.6/1017-1219/E 27

temperature. The temperature setpoint is defined by parameter G02. Adjust the temperature range
with positive differential value G03.

Figure 17: Pumpdown functionality with temperature sensor

If the temperature increases and reaches setpoint plus differential, the liquid line solenoid output
relay will energize the coil to open the valve. The compressor will be controlled by suction pressure.

The temperature value is to be set between two parameters (G04 and G05).
In case of fault in the thermostat probe the opening and the closing of the solenoid valve relay are

timed through limp along parameters (G06 and G07).

Parameter

Factory settings

Pumpdown settings / Comments

A19

0 = Not used = nu

2 = Thermostat temperature = tnt

C01

4 bar rel

Cut-in value for pumpdown

C02

2 bar rel

Cut-out value for pumpdown, eg, 0.2 bar rel

C05

1 = Suction pressure probe = SuP

2 = Case temperature probe = CSt

G01

0 = Not used = nu

4 = Thermostat temperature = tnt

G02

+2°C

Setpoint for temperature, eg, +2°C for meat

G03

+1°C

Positive differential defines upper cut-out value

G04

-10°C

Lower setpoint limit

G05

+15°C

Upper setpoint limit

G06

2 minutes

On time in case of probe failure

G07

1 minute

Off time in case of probe failure

G11

3 minutes

Maximum pumpdown time

G56

0 = Not used = nu

1 = Yes

S07

0 = Not used = nu

7 = Liquid line solenoid = LLS

Table 26: Internal pumpdown with temperature sensor

If temperature ≥ G02 + G03, switch on liquid line solenoid.
If temperature ≤ G02, switch off liquid line solenoid and the compressor will continue to operate until

most of the refrigerant on the low side boils off and is pumped through the compressor into the
condenser and receiver. As the suction pressure falls below the low-pressure cut-out value (C02),
the compressor will cycle off.

The temperature value depends both on parameter G02 and parameter G11 (maximum pumpdown
time). It means that when the liquid line solenoid is off, the compressor will stop because of suction
pressure decrease within G11 time. If the running time of the compressor exceeds G11 value, the
compressor will be forced to shut down and the controller will generate a pumpdown alarm.

28 C6.1.6/1017-1219/E

2.16 Reset to factory settings – Emerson "Hot Key"

2.16.1 How to save factory settings or user settings

There is no way to reset the XCM25D controller to factory settings other than with additional
equipment. Emerson recommends to use the Emerson "Hot Key" (not part of the standard delivery)
to save the factory settings at initial power up. The same hot key can also be used to save user
settings.

By means of a special programming software (Emerson Wizmate) and corresponding hardware
(Emerson Prog-Tool), the user can:

▪ preprogram hot keys;
▪ copy hot keys;
▪ change parameter levels;
▪ compare parameter lists.

For further information please visit our website at www.climate.emerson.com/en-gb or contact your
local Application Engineering representative.

2.16.2 Applicable hot key for ZX units with XCM25D controller

The Emerson "Hot Key" DK00000300 can be used for uploading and downloading of parameter lists.
Copeland ident number 3226456.

Figure 18: Emerson "Hot Key"

2.16.3 Location of the "Hot Key" plug connection on the XCM25D controller

The "Hot Key" plug connection is located on the upper left corner of the XCM25D.

Figure 19: Location of "Hot Key" plug connection

2.16.4 How to program a "Hot Key" from the controller (upload)

▪ Program one controller with the front keypad.
▪ When the controller is on, insert the "Hot Key" and press the UP key; the "uPL" message appears

followed a by a flashing "End" label.

▪ Press the SET key and the "End" label will stop flashing.
▪ Turn the controller off, remove the "Hot Key" then turn it on again.

NOTE: The "Err" message appears in case of a failed programming operation. In this case
push the key again if you want to restart the upload or remove the "Hot Key" to abort the
operation.

C6.1.6/1017-1219/E 29

2.16.5 How to program a controller using an Emerson "Hot Key" (download)

▪ Turn the controller off.
▪ Insert a pre-programmed "Hot Key" into the 5-pin receptacle and turn the controller on.
▪ The parameter list of the hot key will be automatically downloaded into the controller memory.

The "doL" message will blink followed a by a flashing "End" label.

▪ After 10 seconds the controller will restart working with the new parameters.
▪ Remove the "Hot Key".

NOTE: The message "Err" is displayed in case of a failed programming operation. In this case
turn the unit off, then on again if you want to restart the download, or remove the "Hot Key"
to abort the operation.

2.17 Troubleshooting – Alarm history

The controller records the total number of alarm activations (max 50) in the alarm menu (see

Appendix 5).

Action

Key or display

Notes

Enter menu

Push and release the ALR key.

Waiting for action

SEC

The menu to change the section will be entered. The
alarm list section is active.

Enter section list

Press SET to confirm. The following list will be
available to select the proper network function.

Select active alarm
code from list

or

Scroll the list of active alarms by alarm number (letter
+ number, A01-A50).
Press to see the alarm name or code.
Press to see the next active alarm.

Select the alarm to
see the detailed rtC
information

Enter the sub menu with alarm time details.

Select detailed
information from
active alarm list

or

With the rtC activated:

The Hur (hour) parameter is displayed.
Press to see the alarm hour.
Press : Min is displayed.
Press to see the alarm minute.
Press : dAy is displayed.
Press to see the alarm day.
Press : MOn is displayed.
Press to see the alarm month.
Press : YEA is displayed.
Press to see the alarm year.

Note: The clock info indicates the START time of the
alarm.

Without the rtC activated:

The COn (hours) parameter is displayed.

Press to see the compressor working hours.
To exit: press or wait for 15 seconds without

pressing any key.

Exit menu

Press simultaneously or wait for about 10
seconds without pressing any key.

Table 27: How to check the alarm list

30 C6.1.6/1017-1219/E

2.18 Compressor motor protection

The electronic controller protects the compressor motor against the following:

▪ over current;
▪ phase loss;
▪ incorrect phase rotation;
▪ voltage imbalance.

If the compressor motor current exceeds a predefined (non-adjustable) current limit, the electronic
controller shuts the unit down and generates an error signal. For this function two of the main phase
supply lines to the compressor (compressor via the contactor) are routed through the current
sensors.

2.19 System pressure protection

2.19.1 High-pressure safety switch

A high-pressure switch is registered by the electronic board. The sensing device is a non-adjustable,
high-pressure switch that will open in the event of an abnormally high discharge pressure (above 28
bar on ZXME & ZXLE units, 28.8 bar on ZXDE units).

▪ The unit will stop then and restart automatically after a 5-minute delay and after unit pressure has

decreased to 21 bar (24 bar for ZXDE units).

▪ After 7 successive HP cut-outs over 1 hour, the unit will lock out. In this case a manual reset will

be necessary.

2.19.2 High pressure: pressure relief valve

Units with serial numbers prior to 19CZ27683M (single-fan units) and 19DZ28816M (dual-fan units)
are equipped with a side connection port at the top of the liquid receiver to connect a pressure relief
valve. The thread is ¼"-NPT for serial numbers up to 16AZ07042M (single fan) and 16AZ07092M
(dual fan), and ⅜"-NPT for subsequent serial numbers. In all cases the pressure relief valve is not
factory-assembled.

Starting from serial number 19CZ27683M for single-fan units and 19DZ28816M for dual-fan units,
no connection port is available on the liquid receiver any more.

2.19.3 Low-pressure safety switch – Optional

In a way similar to the high-pressure sensor, the electronic controller registers the switching action
of the adjustable low-pressure switch, which will open in the event of an abnormally low suction
pressure:

▪ The unit will stop then restart automatically after a 3-minute delay and when the unit reaches the

cut-in pressure level.

The unit is always equipped with a suction pressure transmitter which also takes care for protection
against vacuum operation. The use of the optional low-pressure cut-out will provide the highest
protection level for the unit. In rare instances of controller breakdown the optional low-pressure switch
would allow to run the unit in emergency mode.

2.20 Other inputs of the XCM25D controller

2.20.1 Customer-supplied control (room thermostat)

The electronic controller is equipped with a digital input (DI3) open/close signal (such as the switching
action of a normal commercial thermostat) and relays a similar action as an output to the compressor
contactor in the case of a thermostat-controlled (parameter "C05") system (see wiring diagrams in
Appendices 2 and 3). If the system is controlled by low-pressure cut-out for a multiple evaporator
system and/or pumpdown system, the controller XCM25D accepts signals directly from an adjustable
low-pressure switch (optional).

2.20.2 Case temperature controller

An alternative method of system temperature control can be used. The electronic controller accepts
an input from a common commercial thermostat (DI3, digital input). For details see Chapter 2.10.5
"Additional features for customization".

C6.1.6/1017-1219/E 31

2.20.3 Ambient temperature sensor

An ambient temperature sensor is connected to the electronic controller. This temperature sensor
has several functionalities like emergency mode control, lower fan speed limitation and crankcase
heater control. The sensor is located on the backside of the compressor compartment.

2.21 Alarm output (DO5) of the XCM25D controller

The digital output DO5 is pre-configured as an alarm contact. The relay (max. 5A, 250V AC) is
activated in case of alarms and lockouts. Warnings will be shown only on the controller display.

32 C6.1.6/1017-1219/E

3 Installation

WARNING
High pressure! Injury to skin and eyes possible! Be careful when opening

connections on a pressurized item.

Copeland EazyCool ZX condensing units are delivered with a holding charge of neutral gas.
The condensing unit should be located in such a place to prevent any dirt, dust, plastic bag, leaves

or papers from covering the condenser and its fins.
The unit must be installed without restricting the airflow.
A clogged condenser will increase the condensing temperature, thus reduce the cooling capacity,

and lead to a high-pressure switch tripping. Clean the condenser fins on a regular basis.

3.1 Condensing unit handling

3.1.1 Transport and storage

WARNING
Risk of collapse! Personal injuries! Move units only with appropriate

mechanical or handling equipment according to weight. Keep in the upright
position. Respect stacking loads according to Figure 20. Do not stack
anything on top of the unit packaging. Keep the packaging dry at all times.

Respect the maximum number of identical packages which may be stacked on one
another, where "n" is the limiting number:

▪ Transport: n = 0
▪ Storage: n = 0

Figure 20: Maximum stacking loads for transport and storage

3.1.2 Weights

Condensing units

Standard compressors

Digital compressors

Medium

temperature

Weight

[kg]

Low

temperature

Weight

[kg]

Medium

temperature

Weight

[kg]

ZXME020E

76

ZXLE020E

79 ZXME025E

79

ZXLE025E

81

ZXME030E

79

ZXLE030E

81

ZXDE030E

82

ZXME040E

91

ZXLE040E

93

ZXDE040E

104

ZXME050E

108

ZXLE050E

106

ZXDE050E

108

ZXME060E

112

ZXLE060E

116

ZXDE060E

112

ZXME075E

118

ZXLE075E

126

ZXDE075E

118

Table 28: Weights

3.2 Refrigeration piping connections

3.2.1 Refrigeration piping installation

WARNING
High pressure! Risk of personal injury! The units are pressurized with dry

air. Be careful when opening connections on a pressurized item.

WARNING
Low surface temperature! Danger of frostbite! The liquid line should be

insulated with 19 mm insulation thickness. Temperature could be as low as
–15°C.

C6.1.6/1017-1219/E 33

IMPORTANT
Tubing quality! Installation contamination! All interconnecting piping

should be of refrigeration grade, clean, dehydrated and must remain capped
at both ends until installation. Even during installation, if the system is left for
any reasonable period of time (say 2 hours), pipes should be re-capped to
prevent moisture and contaminant from entering the system.
Connection sizes! Unsuitable refrigerant flow rate! Do not assume that the
service connection sizes on the unit (at the service valves) are in fact the
correct size to run your interconnecting refrigeration pipes. The service valve
sizes have been selected for convenience of installation and in some cases
(larger units) these may be considered too small. However, for the very short
pipe run within our units these service connection sizes are adequate. All
interconnecting piping should be sized to satisfy the duty required.

IMPORTANT
Absence of insulation on the liquid line in ZXLE units! Air moisture
condensation and lack of performance! Moisture will condensate on the

liquid line and cause water droplets. The liquid line can pick up additional heat
from the ambient which will adversely affect the sub-cooling desirable for the
liquid refrigerant before it enters the expansion valve. Insulate both the suction
and liquid interconnecting piping between the ZX unit and the evaporator.

The pipe should be sized to ensure optimum performance and good oil return. The sizing must also
take into account the full capacity range through which this particular unit will need to operate.

Unit

Suction line

(ODS)

Liquid line

(IDS)

ZXME020E to ZXME030E
ZXDE030E
ZXLE020E to ZXLE030E

3/4" (19.05 mm)

1/2" (12.7 mm)

ZXME040E to ZXME075E
ZXDE040E to ZXDE075E
ZXLE040E to ZXLE075E

7/8" (22.23 mm)

1/2" (12.7 mm)

Table 29: Piping connection sizes

Pipe runs should be kept as short as possible, using the minimum number of directional changes.
Use large radius bends and avoid trapping of oil and refrigerant. This is particularly important for the
suction line. The suction line should ideally slope gently towards the unit. Recommendation slope is
1/200 to 1/250. Upper and lower oil traps, double risers and reduced pipe diameters may be required
for suction lines where long vertical risers cannot be avoided. 3/4

All pipes should be adequately supported to prevent sagging which can create oil traps. The
recommended pipe clamp support distance is shown in Table 30 below:

Tube size

Max distance between 2

clamp supports

1/2" (12.7 mm)

1.20 m

5/8" (16.0 mm)

1.50 m

7/8" (22.0 mm)

1.85 m

1 1/8" (28.5 mm)

2.20 m

Table 30: Maximum distance between 2 clamp supports

NOTE: It is strongly recommended to insulate both the suction and liquid interconnecting
piping between the ZXLE unit and the evaporator.

34 C6.1.6/1017-1219/E

3.2.2 Brazing recommendations

IMPORTANT
Blockage! Compressor breakdown! Maintain a flow of oxygen-free nitrogen

through the system at very low pressure during brazing. Nitrogen displaces
the air and prevents the formation of copper oxides in the system. If allowed
to form, the copper oxide material can later be swept through the system and
block screens such as those protecting capillary tubes, thermal expansion
valves, and accumulator oil return holes.
Contamination or moisture! Bearing failure! Do not remove the plugs until
the compressor is set into the unit. This minimises any entry of contaminants
and moisture.

▪ Remove the discharge connection cap.
▪ Remove the suction connection cap.
▪ Open both valves mid-way. Care should be taken to avoid the holding charge releasing too

quickly.

▪ Be sure tube fitting inner surface and tube outer surface are clean prior to assembly.
▪ Both tubes are extended from the condensing unit housing, therefore we recommend to isolate

the housing by using a wet cloth on the copper tubing.

▪ Recommended brazing materials: a copper/phosphorous or copper/phosphorous/silver alloy

rod should be used for joining copper to copper whereas to join dissimilar or ferric metals a
silver alloy rod either flux coated or with a separate flux would be used.

▪ Use a double-tipped torch.

Figure 21: Brazing - Sectional view

3.2.3 Brazing procedure

For brazing of the tubes, please refer to Figure 22 and procedure hereunder:

▪ Fit the copper tube into the unit tube.
▪ Heat area 1. As the tube approaches brazing

temperature,
▪ Heat area 2 until braze temperature is attained. It
is necessary to heat the tube evenly. Move the torch up
and down and rotating around the tube.
▪ Add braze material to the joint while moving the
torch around the joint to flow braze material around the
circumference.

▪ Then heat area 3. This will draw the brazing material down into the joint.

NOTE: The time spent heating area 3 should be minimal. As with any brazed joint, overheating
may be detrimental to the final result.

To disconnect:

▪ Heat joint areas 2 and 3 slowly and uniformly until solder softens and tube can be pulled out of

the fitting.

To reconnect:

▪ See procedure above.

Figure 22: Suction tube brazing areas

C6.1.6/1017-1219/E 35

3.3 Electrical connection

WARNING
Electrical shock hazard! Serious personal injuries! The power supply of

these units must include an RCD protection with a sensitivity of 30 mA.

IMPORTANT

The front cover of the electrical box is protected by a ground connection. Open
the electrical box cover carefully to avoid pulling out the ground wire.

3.3.1 Power supply connections

WARNING
Electrical pins under voltage! Electrical shock hazard! There are unused

fast-on pins (C1 & DO2) on the XCM25D which could be under voltage. They
are covered by insulated fast-on flags in the factory. Handle carefully when
removing insulating flags during service on site.

The electrical connection of the condensing unit to the power supply must be made by qualified
technicians according to the valid electrical directives, for instance DIN EN 60204-1. The voltage
drop and temperatures on line must also be considered for cable selection.

Copeland EazyCool ZX units are designed for a 380-420V / 3Ph / 50 Hz power supply for TFD and
220-240V / 1Ph / 50 Hz power supply for PFJ. A voltage tolerance of ± 10% is acceptable.

The circuit breaker must be switched off before opening the front door.

3.3.2 Maximum operating currents for cable selection

Unit model

Locked rotor

Rated current A

ZXME Medium-temperature standard units, single-phase PFJ

ZXME020E-PFJ

58.0

13.3

ZXME025E-PFJ

61.0

12.9

ZXME030E-PFJ

82.0

16.9

ZXME040E-PFJ

114.0

24.0

ZXME Medium-temperature standard units, three-phase TFD

ZXME020E-TFD

26.0

5.4

ZXME030E-TFD

40.0

7.7

ZXME040E-TFD

49.3

10.8

ZXME050E-TFD

65.5

13.8

ZXME060E-TFD

74.0

14.1

ZXME075E-TFD

101.0

15.0

ZXDE Medium-temperature Digital units, three-phase TFD

ZXDE030E-TFD

40.0

7.2

ZXDE040E-TFD

48.0

8.9

ZXDE050E-TFD

64.0

12.3

ZXDE060E-TFD

74.0

12.4

ZXDE075E-TFD

100.0

15.0

ZXLE Low-temperature units, single-phase PFJ

ZXLE020E-PFJ

56.6

14.1

ZXLE025E-PFJ

73.7

16.1

ZXLE030E-PFJ

82.3

18.3

ZXLE Low-temperature units, three-phase TFD

ZXLE020E-TFD

39.2

6.2

ZXLE030E-TFD

35.7

7.2

ZXLE040E-TFD

51.5

9.7

ZXLE050E-TFD

51.5

12.9

ZXLE060E-TFD

74.0

14.7

ZXLE075E-TFD

101.0

15.6

Table 31: Unit maximum rated currents for cable selection

36 C6.1.6/1017-1219/E

3.3.3 Electrical wiring

Before commissioning, ensure that the neutral "N" and ground protection "PE" wires are connected
to the main switch.

3.3.4 Electrical protection standard (protection class)

▪ Units: IP class IPX4.
▪ Scroll compressors up to ZX51: IP21 according to IEC 34.
▪ Fan: IP44 according to IEC 34.
▪ Solenoid valve coils: IP65 according to DIN 43650.

3.3.5 Main fuses

WARNING
Isolating switch "On"! Danger of electric shock! Before changing the fuses,

turn the isolating switch off to de-energize the unit.

Follow the steps described below to replace the main fuses:

Figure 23: Replacement of the fuses

Unit

Fuse size

Fuse range

Ident number

ZXME020E to ZXME040E-TFD

ZXLE020E to ZXLE040E-TFD

ZXDE030E to ZXDE060E-TFD

3 × Fuse 10×38

12A

3200810

ZXME050E to ZXME075E-TFD

ZXLE050E to ZXLE075E-TFD

ZXDE075E-TFD

3 × Fuse 10×38

16A

3200821

ZXME020E to ZXME030E-PFJ

ZXLE020E to ZXLE030E-PFJ

1 × Fuse 10×38

20A

3200832

ZXME040E-PFJ

1 × Fuse 10×38

25A

3200843

Table 32: Main fuses sizes and ranges

Pull off the grip with a

screwdriver

Pull the grip again by

hand to open the fuse

holder

As the fuse holder is

open, the fuses can

be replaced

C6.1.6/1017-1219/E 37

3.4 Location & fixings

IMPORTANT
Dust and dirt contamination! Unit lifetime reduction! The unit should

always be installed in a location that ensures clean air flow. External fouling
of the condenser fins also leads to high condensing temperatures and will
reduce the lifetime of the unit.

It is recommended that a clearance of 300 mm from the wall (or the next unit) be maintained from
the unit left and rear panels whereas a clearance of 500 mm must be maintained from the unit right,
top and front panels seen facing the front of the unit – see Figures 24 & 25. Both service access
and airflow have been considered in making these recommendations.

Figure 24: Fixing dimensions and distances – Single-fan units

Figure 25: Fixing dimensions and distances – Dual-fan units

Where multiple units are to be installed in the same location, the contractor needs to consider each
individual case carefully. There can be many variations of unit quantities and available space and it
is not the intention of this manual to go over these. However, in general terms, air by-pass around
each condenser and between the units should be avoided at all times.

38 C6.1.6/1017-1219/E

Ideally, the unit should be mounted level on a solid concrete slab with anti-vibration pads between
unit feet and concrete. However, the ZX condensing unit has also been designed for wall mounting
on suitable brackets. In this case it is equally important that the dimensional guidelines given above
are followed and that additional consideration is given for possible air recycling if units are stacked
on top of each other. Wall mounting brackets are not part of the standard delivery.

Another factor to consider in finding a good installation site is the direction of the prevailing wind. For
example, if the air leaving the condenser faces the prevailing wind, the air flow through the condenser
can be impeded, causing high condensing temperatures and ultimately resulting in reducing the life
of the unit. A baffle is a remedy for this situation.

C6.1.6/1017-1219/E 39

4 Start-up & operation

Before commissioning, ensure that all valves on the condensing unit are fully opened.

4.1 Evacuation

CAUTION
System pressure below atmospheric pressure! Compressor damage!

Never energize the unit/controller without minimum refrigerant system charge.
There is a risk of malfunction of the controller in deep vacuum operation which
can cause compressor damage.

IMPORTANT

The evacuation procedure is based upon achieving an actual system vacuum
standard and is NOT TIME DEPENDENT! The installation has to be
evacuated with a vacuum pump before commissioning. Proper evacuation
reduces residual moisture to 50 ppm. The installation of adequately sized
access valves at the furthest point from the compressor in the suction and
liquid lines is advisable. The system must be evacuated down to less than 3
mbar. If required break the vacuum with dry nitrogen. Pressure must be
measured using a vacuum pressure gauge on the access valves and not on
the vacuum pump. This serves to avoid incorrect measurements resulting from
the pressure gradient along the connecting lines to the pump.

4.2 Charging procedure

4.2.1 Refrigerant charging procedure

IMPORTANT
Inadequate charge! Overheating! The Scroll compressor design requires

system charging as quickly as possible with liquid refrigerant into the liquid
line. This will avoid running the compressor under conditions whereby
insufficient suction gas is available to cool not only the motor but also the
scrolls. Temperature builds up very quickly in the scrolls if this is not done.
Service valve closed! Compressor damage! Do not charge the unit with
vapour (gas). The suction service valve must not be fully closed at any time
when the compressor is running. To do so would cause damage to the
compressor in the same manner as explained above. This valve is provided
for ease of connection and for the fitting of service gauges without removing
the unit panel.

IMPORTANT
Absence of insulation on the liquid line in ZXLE units! Air moisture
condensation and lack of performance! Moisture will condensate on the

liquid line and cause water droplets. The liquid line can pick up additional heat
from the ambient which will adversely affect the sub-cooling desirable for the
liquid refrigerant before it enters the expansion valve. Both the suction and
liquid interconnecting piping between the unit and the evaporator should be
insulated to avoid condensation.

Pre-charging must be carried out with liquid refrigerant through the service valve on the liquid line. It
is advisable to pre-fill the suction side with a partial charge to avoid vacuum operation. Further
charging can be carried out by carefully filling refrigerant through the suction line while
simultaneously checking the sight glass.

NOTE: In order to meet the requirements of the Ecodesign Directive 2009/125/EC with regard

to efficient system operation, ensure the refrigerant charge is sufficient.
NOTE: During the charging process on ZXLE units, the liquid line (outlet of the unit)

temperature must be checked. The charging is sufficient when the liquid line temperature
does not decrease significantly anymore and when the subcooling reaches approximately
25-35K.

40 C6.1.6/1017-1219/E

Figure 26: Service valves for refrigerant charging

An additional Schraeder connection is fitted on the liquid line
below the filter drier in the compressor chamber. It is also possible
to use this connection for charging or servicing.

Recommendation is to break vacuum in the system with partial
charge of refrigerant, then start the system.

For charge adjustment it is recommended to check the liquid sight
glass just before the expansion valve.

Figure 27: Liquid line service port

NOTE: During the charging process on low temperature ZXLE units, an error message E47
and/or E48 could occur. Both warnings indicate a lack of refrigerant charge in the system.
The operation of the unit is not affected by the warning signals. Continue charging the
system: as the quantity of refrigerant increases, the warning signals will automatically switch
off.

4.2.2 Oil charging procedure

Copeland EazyCool ZX condensing units are pre-charged with oil. After commissioning, the oil level
should be checked and topped up if necessary.

NOTE: The oil level should be approximately halfway up the sight glass.

As mentioned in chapter 2.6.1 "Qualified refrigerants and oilsError! Reference source not found.",
Emerson recommends charging with one of the following oil types:

▪ Emkarate RL 32 3MAF
▪ Mobil EAL Arctic 22 CC

Charging is done through the Schraeder valve located on the suction valve.

4.2.3 Oil separator

ZXDE & ZXLE units are equipped with an oil separator. This separator is pre-charged with 0.5 liter
of oil.

4.3 Rotation direction of Scroll compressors

Scroll compressors, like several other types of compressors, will only compress in one rotational
direction. Direction of rotation is not an issue with single-phase compressors since they will always
start and run in the proper direction. Three-phase compressors are protected against wrong rotation
field by the unit controller.

Service valves

Hexagone socket wrench

Valve covers

Schraeder valves

C6.1.6/1017-1219/E 41

4.4 Maximum compressor cycle

Maximum permitted starts per hour: 10. The factory setting of the XCM25D system controller already

takes into account the maximum permitted starts and stops of the compressor and also controls
running time and minimal downtime. It is recommended to change these settings only in exceptional
cases.

4.5 Checks before starting & during operation

IMPORTANT
Liquid valves not fully opened! Liquid trap! Both valves should be fully

opened on the liquid line in order to prevent liquid trapping.

Before a system runs for the first time:

▪ Check that the valves on the liquid line are fully opened.
▪ Set the essential parameters of the electronic controller in the programming level 1 (compressor

cut-out/cut-in settings, condensing fan setpoint….) according to the required application.

▪ Carry out visual inspection.
▪ Perform control tests to ensure all controls operate correctly, including any manual backup system

(if applied).

▪ Check also the following:

✓ Documentation for the system and its marking, especially pressure equipment.
✓ Installation of safety devices.
✓ Compressor oil level.
✓ Pressure test records.
✓ All valves open/closed as required for operation.

After start-up and when operation conditions have stabilised:

▪ It is recommended to check the oil level in the compressors and to add oil if necessary to ensure

a sufficient oil level (halfway up the sight glass).

▪ The following should also be checked:

✓ Fan rotation.
✓ Refrigerant charge.
✓ Expansion valve superheat.

42 C6.1.6/1017-1219/E

5 Maintenance & repair

5.1 Replacing a compressor

CAUTION
Inadequate lubrication! Bearing destruction! Exchange the accumulator

after replacing a compressor with a burned-out motor. The accumulator oil
return orifice or screen may be plugged with debris or may become plugged.
This will result in starvation of oil to the new compressor and a second failure.

In the case of a motor burnout, the majority of contaminated oil will be removed with the compressor.
The rest of the oil is cleaned through the use of suction and liquid line filter driers. A 100% activated
alumina suction line filter drier is recommended but must be removed after 72 hours. It is highly
recommended to replace the suction accumulator, if the system contains one. This is because
the accumulator oil return orifice or screen may be plugged with debris or may become plugged
shortly after a compressor failure. This will result in starvation of oil to the replacement compressor
and a second failure. When a compressor is exchanged in the field, it is possible that a major portion
of the oil may still be in the system. While this may not affect the reliability of the replacement
compressor, the extra oil will add to rotor drag and increase power usage.

▪ De-energize the condensing unit before any intervention.
▪ Close valves to isolate the unit from the system.
▪ Recover the refrigerant from the unit and make sure that the compressor is not under pressure.
▪ Release the compressor mounting parts then lift the compressor and replace it with the new one.

NOTE: For more detailed instructions, please refer to the compressor application guidelines.

5.2 Condenser fins

CAUTION
Acid cleaning! Corrosion of condenser fins! Do not use acidic solutions to

clean the coil. After cleaning, the fins should be brushed lightly with a proper
fin comb.

Condenser fins become dirty over time as ambient air is induced to the condenser. Dirty coil surfaces
result in high condensing temperatures and poor unit performance. Regular cleaning is
recommended, the frequency of doing so being dependent on the installation and the surrounding
environment. As a general guide it is advisable to do this at least once every two months.

As a general rule and for a clean environment we recommend that the fins be cleaned with liquid
detergent diluted with clean water. The ZX unit has a well-designed chassis with falling levels towards
a large drainage hole and provided the unit is installed level, any cleaning solution should be able to
drain away. A light brush downward (in the direction of the fins) should be done before washing to
remove heavy deposits.

NOTE: In order to meet the requirements of the Ecodesign Directive 2009/125/EC with regard
to efficient system operation, ensure the heat exchangers remain clean at all times.

5.3 Electrical connections

WARNING
Isolating switch "On"! Danger of electric shock! Before undertaking any

task on the electrical equipment, turn off the main power supply to de-energise
the unit.

All condensing units will generate some degree of vibration. Copeland EazyCool ZX units are no
exception. However, the vibration level from the compliant scroll technology is less severe than in
units using reciprocating compressor technology. Thanks to this reduced vibration, these units can
be mounted on simple, less expensive rubber mounting pads.

Nevertheless, over time, due to these slight vibrations and to temperature fluctuations within the unit
housing, electrical terminations might become loose. The components most likely to be affected are
the main terminal strip and the compressor contactor. It is suggested to check the main electrical
terminations for tightness and to carry out a visual inspection of the low voltage crimped terminals at
least once every 6 months.

C6.1.6/1017-1219/E 43

5.4 Routine leak testing

All joints inside the system should be leak-tested as part of a regular maintenance schedule.

NOTE: In order to meet the requirements of the Ecodesign Directive 2009/125/EC with regard
to efficient system operation, ensure the refrigerant and oil charges are sufficient.

5.5 Condenser fan(s) & motor(s)

A yearly inspection of these items is recommended. Fastenings can become loose, bearings may
wear and fans may require cleaning of solid deposits that can cause rotational imbalance.

Motors come with lifelong lubrication bearings that do not require lubricating on a routine basis, but
just need to be checked for wear.

6 Certification & approval

▪ Copeland EazyCool ZX condensing units comply with the Low Voltage Directive

LVD 2014/35/EU. The applied harmonised standard is EN 60335 (Household and similar
electrical appliances – Safety, Part 1: General Requirements and Part 2-89: Particular
requirements for commercial refrigerating appliances with an incorporated or remote refrigerant
condensing unit or compressor).

▪ The condensing units and their piping comply with the Pressure Equipment Directive

PED 2014/68/EU (Art.4 §3 - Sound Engineering Practice).

▪ The condensing units and their components are CE marked as far as required and thereby

establish conformity with the relevant directives.

▪ Conformity Declarations for components are available as far as required.
▪ The Manufacturer's Declaration of Incorporation has to be respected when incorporating these

products into a machine.

7 Dismantling & disposal

Removing oil and refrigerant:

▪ Do not disperse in the environment.
▪ Use the correct equipment and method of removal.
▪ Dispose of oil and refrigerant according to national legislation and

regulations.
Dispose of compressor and/or unit according to national legislation and

regulations.

DISCLAIMER

1. The contents of this publication are presented for informational purposes only and are not to be
construed as warranties or guarantees, express or implied, regarding the products or services
described herein or their use or applicability.

2. Emerson Climate Technologies GmbH and/or its affiliates (collectively "Emerson"), as
applicable, reserve the right to modify the design or specifications of such products at any time
without notice.

3. Emerson does not assume responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use and maintenance of any Emerson product remains solely
with the purchaser or end user.

4. Emerson does not assume responsibility for possible typographic errors contained in this
publication.

44 C6.1.6/1017-1219/E

Appendix 1: Overview of the ZX unit components

Components

Medium temperature

Medium temperature

Low temperature

Standard

Digital

Standard

ZXME

ZXDE

ZXLE

Compressor M1

Fan M2.1

Fan M2.2

ZXME050E – ZXME075E

ZXLE050E & ZXLE060E

Y1 Stepper valve EVI

[-]

[-]

Y1 Stepper valve liquid

[-]

[-]

Y2 DGS solenoid valve

[-] [-]

E1 Crankcase heater

S1 High-pressure switch

S2 Low-pressure switch

[-]

[-]

[-]

S3 Room thermostat (optional)

[-]

[-]

[-]

B1 Pressure transducer suction

B2 Pressure transducer discharge

B3 DLT NTC discharge

B4 EVI vapour in sensor NTC

[-]

[-]

B5 EVI vapour out sensor NTC

[-]

[-]

B6 Ambient temperature sensor NTC

B7 Temperature sensor (optional)

[-]

[-]

[-]

Table 33: Overview of the ZX unit components

C6.1.6/1017-1219/E 45

Appendix 2: Wiring diagram – ZXME / ZXLE / ZXDE units (380-420V / 3 Ph / 50 Hz)

Figure 28: Wiring diagram – 3-Phase motor

46 C6.1.6/1017-1219/E

Appendix 3: Wiring diagram – ZXME / ZXLE units (230V / 1 Ph / 50 Hz)

Figure 29: Wiring diagram – 1-Phase motor

C6.1.6/1017-1219/E 47

Appendix 4: Parameters level 1

Legend
L1 = Parameter in level 1 (without password)
L2 = Parameter in level 2 (with password = 3 2 1)
N.V. = Parameter not accessible

NOTE: When changing parameters C01 (Cin), C02 (CoU) and C05 (CPb) a reset of the controller (interruption of power supply) is required.

Parameter

Description

Range

ZXDE

ZXME

ZXLE

C01

Compressor cut-in pressure setpoint

CoU to US; C02 to C04

N.V.

L1

L1

C02

Compressor cut-out pressure setpoint

LS to Cin; C03 to C01

L2

L1

L1

C07

Refrigerant selection for regulation

R404A (0-404) - R507 (1-507)
R134a (2-134) - R22 (3-R22)
R407C (4-07C) - R407A (5-07A)
R407F (6-07F) - R448A (7-48A)
R449A (8-49A)

L1

L1

L1

C16

Digital compressor setpoint

LS to US; C03 to C04

L1

N.V.

N.V.

C17

Proportional band for compressor regulation

0.1 to 9.9 bar; 0.1 to 99.9 PSI;
1 to 999 KPA; 0.1°C to 25.5°C

L1

N.V.

N.V.

C21

Cycle time for digital compressor

10 to 40 sec

L1

N.V.

N.V.

C24

Minimum capacity for digital compressor

0 to PMA; 0 to C25

L1

N.V.

N.V.

C25

Maximum capacity for digital compressor

PMi to 100; C24 to 100

L1

N.V.

N.V.

D29

Low pressure alarm value (from serial number
16EZ08855M onwards)

0 to 15 bar

L1

L1

L1

E39

Condenser temperature setpoint when fan
setpoint modulation is disabled

-40°C to 110°C

L1

L1

L1

E46

Regulation band of variable fan

0.1°C to 25.5°C

L1

L1

L1

N01

Current minute

0 to 59

L1

L1

L1

N02

Current hour

0 to 23

L1

L1

L1

N03

Date of month

1 to 31

L1

L1

L1

N04

Month

1 to 12

L1

L1

L1

N05

Year

0 to 99

L1

L1

L1

T18

Access to Pr2 level

[0÷999]

L1

L1

L1

Table 34: Parameters level 1

48 C6.1.6/1017-1219/E

Appendix 5: Alarm menu

Code

Description

Cause

Action

Reset

E01

AI1 error (Probe 1/Suction pressure
transducer failure alarm)

Probe failure or out of
range

Only in digital unit - compressor is
activated according to C23, and
compressor on & off time is according
to D02 & D03

Automatically as soon as the probe restarts
working.

E02

AI2 error (Probe 2/mid-coil
temperature sensor failure alarm)

Probe failure or out of
range

The fan speed control is disabled

Automatically as soon as the probe restarts
working.

E03

AI3 error (Probe 3/discharge line
temperature sensor failure alarm)

Probe failure or out of
range

The discharge temperature control is
disabled

Automatically as soon as the probe restarts
working.

E04

AI4 error (Probe 4/PHE vapour inlet
temperature sensor failure alarm)

Probe failure or out of
range

PHE superheat control is disabled
(ZXLE/ZXME units)

Automatically as soon as the probe restarts
working.

E05

AI5 error (Probe 5/PHE vapour
outlet temperature sensor failure
alarm)

Probe failure or out of
range

PHE superheat control is disabled
(ZXLE/ZXME units)

Automatically as soon as the probe restarts
working.

E06

AI6 error (Probe 6/ambient
temperature sensor failure alarm)

Probe failure or out of
range

The functions related to probe 6
(ambient sensor) are disabled

Automatically as soon as the probe restarts
working.

E07

AI7 error

Probe failure or out of
range

E08

Battery error

E09

Current sensor 1 error

Probe out of range

The functions related to the current
sensor are disabled

Automatically as soon as the probe restarts
working.

E10

Current sensor 2 error

Probe out of range

The functions related to the current
sensor are disabled

Automatically as soon as the probe restarts
working.

E11

Voltage sensor 1 error

Probe out of range

The functions related to the current
sensor are disabled

Automatically as soon as the probe restarts
working.

E12

Voltage sensor 2 error

Probe out of range

The functions related to the current
sensor are disabled

Automatically: as soon as the probe restarts
working.

E13

Voltage sensor 3 error

Probe out of range

The functions related to the current
sensor are disabled

Automatically as soon as the probe restarts
working.

E14-E19

Reserved

C6.1.6/1017-1219/E 49

Code

Description

Cause

Action

Reset

E20

Lost phase error

Power supply phase
loss (3-phase unit)

The compressor will trip

Automatically: lost phase recover and H08
delay time out. If all three phases are present
but the controller still shows the error message,
set parameters H06 and H25 to "No".

L20

Lost phase lockout

Power supply phase
loss happened for H12
time within one hour
(3-phase unit)

The compressor will lock out

Hold "start" button for 5 sec or manual power
off and on. If all three phases are present but
the controller still shows the error message, set
parameters H06 and H25 to "No".

L21

Phase sequence lockout

Incorrect phase
sequence (3-phase
unit)

The compressor will lock out, rotation
field has to be changed

Manual power off, invert 2 phases and power
on. If the phase sequence is correct but the
controller still shows the error message, set
parameter H25 to "No".

E22

Phase imbalance

One phase voltage
lower than H18
percentage of 3 phases
average voltage
(3-phase unit)

The compressor is activated according
to H19

Automatically: voltage recover and H16 setting
delay time-out. If all three phases are present
but the controller still shows the error message,
set parameter H06 to "No".

E23

Over current

Electrical current larger
than H09 setting

The compressor will trip

Automatically: H08 delay time-out. If the current
is within the limits but the controller still shows
the error message, set parameter H06 to "No".

L23

Over current lockout

Over current happened
for H11 times within
one hour

The compressor will lock out (if H11
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power
off and on (if H11 equal to 0, compressor
automatically starts after H08 delay time-out). If
the current is within the limits but the controller
still shows the error message, set parameter
H06 to "No".

E24

Open run circuit error

Motor running winding
open (1-phase unit)

The compressor will trip

Automatically: H08 delay time-out.

L24

Open run circuit lockout

Motor running winding
open error happened
for H12 times within
one hour (1-phase unit)

The compressor will lock out (if H12
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power
off and on (if H12 equal to 0, compressor
automatically starts after H08 delay time-out).

E25

Open start circuit error

Motor start winding
open (1-phase unit)

The compressor will trip

Automatically: H08 delay time-out.

L25

Open start circuit lockout

Motor start winding
open error happened
for H12 times within
one hour (1-phase unit)

The compressor will lock out (if H12
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power
off and on (if H12 equal to 0, compressor
automatically starts after H08 delay time-out).

50 C6.1.6/1017-1219/E

Code

Description

Cause

Action

Reset

E26

Under voltage alarm

Voltage lower than H13
setting for H15 seconds

The compressor will trip

Automatically: voltage is back within acceptable
range and H16 delay time-out. If the voltage
corresponds to the required voltage but the
controller still shows the error message, set
parameter H06 to "No".

L26

Under voltage lockout

Under voltage
happened for H17
times within one hour

The compressor will lock out (if H17
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power off
and on (if H17 equal to 0, compressor
automatically starts when voltage is back within
acceptable range and H16 delay time-out). If
the voltage corresponds to the required voltage
but the controller still shows the error message,
set parameter H06 to "No".

E27

Over voltage alarm

Voltage larger than
H14 setting for H15
seconds

The compressor will trip

Automatically: voltage is back within acceptable
range and H16 delay time-out. If the voltage
corresponds to the required voltage but the
controller still shows the error message, set
parameter H06 to "No".

L27

Over voltage lockout

Over voltage happened
for H17 times within
one hour

The compressor will lock out (if H17
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power off
and on (if H17 equal to 0, compressor
automatically starts when voltage is back within
acceptable range and H16 delay time-out). If
the voltage corresponds to the required voltage
but the controller still shows the error message,
set parameter H06 to "No".

E28

Compressor built-in protector trip

Compressor built-in
thermal protector trips

Warning signal only

Automatically: as soon as electrical current is
detected. Check the voltage coming to the
compressor.

E30

Main power lost

Controller power supply
lost

E40

High-pressure switch alarm

High-pressure switch
open

The compressor will trip

Automatically: high-pressure switch closed and
D14 delay time-out. If the high pressure is
below the limit but the alarm is still on, check
fuse F3.

L40

High-pressure switch lockout

High-pressure switch
open error happened
D15 times within one
hour

The compressor will lock out (if D15
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power off
and on (if D15 equal to 0, compressor
automatically starts when high-pressure switch
is closed and D14 delay time-out). If the high
pressure is below the limit but the alarm is still
on, check fuse F3.

C6.1.6/1017-1219/E 51

Code

Description

Cause

Action

Reset

E41

Low-pressure switch alarm

Low-pressure switch
open

The compressor will trip

Automatically: low-pressure switch closed and
D28 delay time-out.

E43

Low pressure alarm

The pressure is below
D29

Warning signal only

To deactivate the alarm function set parameter
D13 to "No".

E44

Discharge line temperature alarm

Discharge line
temperature higher
than D22 for D24
seconds

The compressor will trip

Automatically: discharge line temperature lower
than D23 setting and D25 delay time-out.

L44

Discharge line temperature lockout

Discharge line
temperature overheat
happened for D26
times within one hour

The compressor will lock out (if D26
equal to 0, no compressor lockout)

Hold "start" button for 5 sec or manual power off
and on (if D26 equal to 0, compressor
automatically starts when discharge line
temperature is lower than D23 setting and D25
delay time-out).

E45

High condenser pressure alarm

Not used

E46

High condenser temperature alarm

Condenser
temperature larger than
E58 for E59 minutes

The compressor is activated according
to E60

Automatically: as soon as condenser
temperature is lower than E61.

E47

EXV full open in EVI

EXV full open for F40
minutes

Warning signal only

Automatically: as soon as EXV is not at
maximum steps.

E48

Refrigerant shortage error in EVI

EXV full open and PHE
super heat is larger

than (F28/F29…/F37 +

F39)

(F28/F29…/F37

depends on refrigerant
type)

Warning signal only

Automatically: as soon as PHE super heat is
lower than (F28/F29…/F37 + F39).

E49

Pumpdown alarm

Not used

E50

High side floodback alarm

The differential
temperature between
discharge and mid-coil
is lower than H21 for
accumulated H22
minutes in H23 minutes

Warning signal only

Automatically: as soon as differential
temperature between discharge and mid-coil is
larger than H21 for H24 minutes.

E60

Max pressure alarm of superheating

Not used

52 C6.1.6/1017-1219/E

Code

Description

Cause

Action

Reset

E61

Min pressure alarm of superheating

Not used

E62

High superheating alarm

Not used

E63

Low superheating alarm

Not used

E64

High room temperature alarm

Not used

E65

Low room temperature alarm

Not used

E66

Open door alarm

If the door is open
longer than dSA/G53

Warning signal only if rrd/G09 is "no"
Alarm and compressor trip if rrd/G09 is
"yes"

Manual or automatic – see Action.

E67-E79

Reserved

E80

rtC warning, date error

HW problem in the
board

Disable the rtC or change the board

E81

rtC warning, communication error

HW problem in the
board

Disable the rtC or change the board

E82

Probe configuration error

E83

DI configuration error

E84

Compressor configuration error

E85

Injection probe configuration error

Injection EXV output
mode is selected, but
no relevant sensors

Injection EXV will not work

Automatically: as soon as the injection EXV is
properly configured.

E86

EEPROM R/W error (manual)

HW problem in the
board

Change the board

E87-E99

Reserved

Table 35: Alarm code overview

C6.1.6/1017-1219/E 53

Appendix 6: Additional features for customization

Required setting for proper functionality

Setting needs to be adjusted according to application

Room thermostat or pressure switch (not available on ZXDE units) – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

C05

Compressor regulation probe selection

SuP = Suction pressure probe

dIS = Suction pressure switch / Room thermostat

R07

Digital input 3 configuration

nu = Not used

SuS = Suction pressure switch / Room thermostat

Temperature sensor in case temperature – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

A19

Probe 7 configuration

nu = Not used

tnt = Thermostat temperature

C05

Compressor regulation probe selection

SuP = Suction pressure probe

CSt = Case temperature

G01

Case temperature probe selection

nu = Not used

tnt = Thermostat temperature

G02

Cut-out temperature

+2°C

Adjust to application requirements

G03

Positive differential defines upper cut-in temperature

1K

Adjust to application requirements

Pumpdown with room thermostat (not available on ZXDE units) – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

C05

Compressor regulation probe selection

SuP = Suction pressure probe

dIS = Suction pressure switch / Room thermostat

G56

Use the liquid line solenoid

No

Yes

R07

Digital input 3 configuration

nu = Not used

SuS = Suction pressure switch / Room thermostat

R08

Digital input 3 polarity

CL = Closed

CL = Closed

S07

Relay output 4

nu = Not used

LLS = Liquid line solenoid

C01

Compressor cut-in pressure setpoint

4 bar rel

Adjust to application requirements

C02

Compressor cut-out pressure setpoint

2 bar rel

Adjust to application requirements

54 C6.1.6/1017-1219/E

Pumpdown with temperature sensor in case temperature (not available on ZXDE units) – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

A19

Probe 7 configuration

nu = Not used

tnt = Thermostat temperature

C05

Compressor regulation probe selection

SuP = Suction pressure probe

CSt = Case temperature

G01

Case temperature probe selection

nu = Not used

tnt = Thermostat temperature

G56

Use the liquid line solenoid

No

Yes

S07

Relay output 4

nu = Not used

LLS = Liquid line solenoid

C01

Compressor cut-in pressure setpoint

4 bar rel

Adjust to application requirements

C02

Compressor cut-out pressure setpoint

2 bar rel

Adjust to application requirements

G02

Cut-out temperature

+2°C

Adjust to application requirements

G03

Positive differential defines upper cut-in temperature

1K

Adjust to application requirements

Defrost with time intervals – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

A19

Probe 7 configuration

nu = Not used

EPt = Evaporator temperature

G12

Defrost probe selection

nu = Not used

EPt = Evaporator temperature

G23

Defrost interval mode

nu = Not used

In = By time (G18)

S05

Relay output 2

nu = Not used

dEF = Defrost

G18

Interval between defrost cycles

4 min

Adjust to application requirements

G19

Maximum duration of defrost

20 min

Adjust to application requirements

G21

Defrost termination temperature

10

Adjust to application requirements

G26

Drip time

1 min

Adjust to application requirements

C6.1.6/1017-1219/E 55

Defrost with Real Time Clock – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

A19

Probe 7 configuration

nu = Not used

EPt = Evaporator temperature

G12

Defrost probe selection

nu = Not used

EPt = Evaporator temperature

G23

Defrost interval mode

nu = Not used

rtC = Real time clock

S05

Relay output 2

nu = Not used

dEF = Defrost

G18

Interval between defrost cycles

4 min

Adjust to application requirements

G19

Maximum duration of defrost

20 min

Adjust to application requirements

G21

Defrost termination temperature

10

Adjust to application requirements

G26

Drip time

1 min

Adjust to application requirements

G28-41

See table 32 " Parameter list Level 1 & Level 2 (Pr1 & Pr2)"

[-] min

Adjust to application requirements

Defrost with evaporator fan – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

A19

Probe 7 configuration

nu = Not used

EPt = Evaporator temperature

G12

Defrost probe selection

nu = Not used

EPt = Evaporator temperature

G23

Defrost interval mode

nu = Not used

In = By time (G18)

G42

Fans operating mode

Cn

Oy

S05

Relay output 2

nu = Not used

EPF = Evaporator fan

G18

Interval between defrost cycles

4 min

Adjust to application requirements

G19

Maximum duration of defrost

20 min

Adjust to application requirements

G21

Defrost termination temperature

10

Adjust to application requirements

G26

Drip time

1 min

Adjust to application requirements

G55

Fan delay after defrost

1 min

Adjust to application requirements

Unit On/Off – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

R07

Digital input 3 configuration

nu = Not used

OnF = On/Off

R08

Digital input 3 polarity

CL = Closed

Adjust to application requirements

56 C6.1.6/1017-1219/E

Evaporator fan – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

G42

Fans operating mode

cn

cn = Switch on and off with the compressor, stop
during defrost
On = Always on, stop during defrost
cy = Switch on and off with the compressor, run
during defrost
Oy = Always on, run during defrost

S05

Relay output 2

nu = Not used

EPF = Evaporator fan

G45

Fan on time

1 min

Adjust to application requirements

G46

Fan off time

1 min

Adjust to application requirements

G55

Fan delay after defrost

1 min

Adjust to application requirements

System EXV – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

A19

Probe 7 configuration

nu = Not used

SLt = Suction line temp

L02

Set of superheating

5

7

S11

EXV configuration

uin or Lin

SHt = System superheat

Door switch – System restart is required!

Parameter

Parameter description

Factory setting

Required setting

G08

Compressor and fan status with open door

Fn

nO = Normal operation

Fn = Stop fan

cP = Compressor off

Fc = Compressor and fans off

R07

Digital input 3 configuration

nu = Not used

dOr = Door

G53

Maximum time with open door before alarm goes off

3 min

Adjust to application requirements

R08

Digital input 3 polarity

CL = Closed

Adjust to application requirements

Table 36: Additional features for customization

C6.1.6/1017-1219/E 57

Appendix 7: Temperature / resistance curve for B7 Sensor (customer option)

R25 = 10kΩ B25/85=3435K

Temp.

[°C]

Resistance

[kΩ]

Temp.

[°C]

Resistance

[kΩ]

Temp.

[°C]

Resistance

[kΩ]

Temp.

[°C]

Resistance

[kΩ]

Temp.

[°C]

Resistance

[kΩ]

Temp.

[°C]

Resistance

[kΩ]

-50

329.2

-21

71.07

8

19.48

37

6.468

66

2.512

95

1.108

-49

310.7

-20

67.74

9

18.70

38

6.246

67

2.437

96

1.080

-48

293.3

-19

64.54

10

17.96

39

6.033

68

2.365

97

1.052

-47

277.0

-18

61.52

11

17.24

40

5.829

69

2.296

98

1.025

-46

261.3

-17

58.65

12

16.55

41

5.630

70

2.229

99

0.999

-45

247.5

-16

55.95

13

15.90

42

5.439

71

2.163

100

0.974

-44

234.1

-15

53.39

14

15.28

43

5.256

72

2.101

101

0.949

-43

221.6

-14

50.95

15

14.68

44

5.080

73

2.040

102

0.925

-42

209.8

-13

48.66

16

14.12

45

4.912

74

1.981

103

0.902

-41

198.7

-12

46.48

17

13.57

46

7.749

75

1.924

104

0.879

-40

188.4

-11

44.44

18

13.06

47

4.594

76

1.870

105

0.858

-39

178.3

-10

42.45

19

12.56

48

4.444

77

1.817

106

0.836

-38

168.9

-9

40.56

20

12.09

49

4.300

78

1.766

107

0.816

-37

160.1

-8

38.76

21

11.63

50

4.161

79

1.716

108

0.796

-36

151.8

-7

37.05

22

11.20

51

4.026

80

1.669

109

0.777

-35

144.0

-6

35.43

23

10.78

52

3.897

81

1.622

110

0.758

-34

136.6

-5

33.89

24

10.38

53

3.772

82

1.577

111

0.740

-33

129.7

-4

32.43

25

10.00

54

3.652

83

1.534

112

0.722

-32

123.2

-3

31.04

26

9.632

55

3.537

84

1.492

113

0.705

-31

117.1

-2

29.72

27

9.281

56

3.426

85

1.451

114

0.688

-30

111.3

-1

28.47

28

8.944

57

3.319

86

1.412

115

0.672

-29

105.7

0

27.28

29

8.622

58

3.216

87

1.374

116

0.656

-28

100.4

1

26.13

30

8.313

59

3.116

88

1.337

117

0.641

-27

95.47

2

25.03

31

8.015

60

3.021

89

1.301

118

0.626

-26

90.80

3

23.99

32

7.725

61

2.928

90

1.266

119

0.611

-25

86.39

4

22.99

33

7.455

62

2.838

91

1.233

120

0.597

-24

82.22

5

22.05

34

7.192

63

2.752

92

1.200

-23

78.29

6

21.15

35

6.941

64

2.669

93

1.169

-22

74.58

7

20.30

36

6.699

65

2.589

94

1.138

Table 37: B7 AI7 optional sensor >> Temperature / resistance curve

58 C6.1.6/1017-1219/E

Appendix 8: List of tables and figures

Tables

Table 1: ZX condensing unit technical data ............................................................................................................................................................................................ 4

Table 2: ZX condensing unit features ...................................................................................................................................................................................................... 4

Table 3: Qualified refrigerants and oils .................................................................................................................................................................................................... 6

Table 4: BOM history ............................................................................................................................................................................................................................... 7

Table 5: Legend of the P&I diagram for ZXME units ............................................................................................................................................................................... 8

Table 6: Legend of the P&I diagram for ZXLE units ................................................................................................................................................................................ 9

Table 7: Legend of the P&I diagram for ZXDE units ............................................................................................................................................................................. 10

Table 8: Compressor models cross reference ...................................................................................................................................................................................... 11

Table 9: Condenser fans technical data ................................................................................................................................................................................................ 11

Table 10: Prearranged additional connections ...................................................................................................................................................................................... 15

Table 11: Digital output specifications ................................................................................................................................................................................................... 16

Table 12: External room thermostat - Parameters ................................................................................................................................................................................ 16

Table 13: External temperature sensor – Parameters .......................................................................................................................................................................... 17

Table 14: Discharge pressure limitations .............................................................................................................................................................................................. 17

Table 15: Defrost parameters ................................................................................................................................................................................................................ 19

Table 16: LED functions description ...................................................................................................................................................................................................... 20

Table 17: Display visualisation .............................................................................................................................................................................................................. 20

Table 18: Single commands .................................................................................................................................................................................................................. 21

Table 19: Double commands ................................................................................................................................................................................................................. 22

Table 20: Programming level 1 parameters .......................................................................................................................................................................................... 22

Table 21: Fast access menu ................................................................................................................................................................................................................. 23

Table 22: Parameters in programming level Pr1 ................................................................................................................................................................................... 24

Table 23: Minimum cut-out value for pumpdown .................................................................................................................................................................................. 26

Table 24: Pumpdown 1 .......................................................................................................................................................................................................................... 26

Table 25: Pumpdown 2 .......................................................................................................................................................................................................................... 26

Table 26: Internal pumpdown with temperature sensor ........................................................................................................................................................................ 27

Table 27: How to check the alarm list .................................................................................................................................................................................................... 29

Table 28: Weights .................................................................................................................................................................................................................................. 32

Table 29: Piping connection sizes ......................................................................................................................................................................................................... 33

Table 30: Maximum distance between 2 clamp supports ..................................................................................................................................................................... 33

Table 31: Unit maximum rated currents for cable selection .................................................................................................................................................................. 35

Table 32: Main fuses sizes and ranges ................................................................................................................................................................................................. 36

Table 33: Overview of the ZX unit components .................................................................................................................................................................................... 44

Table 34: Parameters level 1 ................................................................................................................................................................................................................. 47

Table 35: Alarm code overview ............................................................................................................................................................................................................. 52

Table 36: Additional features for customization .................................................................................................................................................................................... 56

Table 37: B7 AI7 optional sensor >> Temperature / resistance curve .................................................................................................................................................. 57

C6.1.6/1017-1219/E 59

Figures

Figure 1: Dimensions of models ZXME020E to ZXME040E, ZXDE030E and ZXLE020E to ZXLE040E (single-fan units) ................................................................... 5

Figure 2: Dimensions of models ZXME050E to ZXME075E, ZXDE040E to ZXDE075E and ZXLE050E to ZXLE075E (dual-fan units) .............................................. 5

Figure 3: Nomenclature ZX units ............................................................................................................................................................................................................. 6

Figure 4: P&I diagram for ZXME units ..................................................................................................................................................................................................... 8

Figure 5: P&I diagram for ZXLE units ...................................................................................................................................................................................................... 9

Figure 6: P&I diagram for ZXDE units ................................................................................................................................................................................................... 10

Figure 7: ZX unit housing....................................................................................................................................................................................................................... 12

Figure 8: Electronic controller ................................................................................................................................................................................................................ 12

Figure 9: XCM25D controller functionality overview .............................................................................................................................................................................. 13

Figure 10: Modbus port and termination jumpers .................................................................................................................................................................................. 13

Figure 11: Prearranged additional connections ..................................................................................................................................................................................... 15

Figure 12: External temperature sensor – Functionality ........................................................................................................................................................................ 16

Figure 13: Local display ......................................................................................................................................................................................................................... 20

Figure 14: Remote display front panel mounting ................................................................................................................................................................................... 21

Figure 15: VNR connection for the remote display ................................................................................................................................................................................ 21

Figure 16: Digital operation ................................................................................................................................................................................................................... 25

Figure 17: Pumpdown functionality with temperature sensor ................................................................................................................................................................ 27

Figure 18: Emerson "Hot Key" ............................................................................................................................................................................................................... 28

Figure 19: Location of "Hot Key" plug connection ................................................................................................................................................................................. 28

Figure 20: Maximum stacking loads for transport and storage ............................................................................................................................................................. 32

Figure 21: Brazing - Sectional view ....................................................................................................................................................................................................... 34

Figure 22: Suction tube brazing areas ................................................................................................................................................................................................... 34

Figure 23: Replacement of the fuses ..................................................................................................................................................................................................... 36

Figure 24: Fixing dimensions and distances – Single-fan units ............................................................................................................................................................ 37

Figure 25: Fixing dimensions and distances – Dual-fan units ............................................................................................................................................................... 37

Figure 26: Service valves for refrigerant charging ................................................................................................................................................................................. 40

Figure 27: Liquid line service port .......................................................................................................................................................................................................... 40

Figure 28: Wiring diagram – 3-Phase motor.......................................................................................................................................................................................... 45

Figure 29: Wiring diagram – 1-Phase motor.......................................................................................................................................................................................... 46

60 C6.1.6/1017-1219/E

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C6.1.6/1017-1219/E

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