Danfoss BW10 020-090 User manual

BW10 020-090

Control

Operation instructions

VMGFU102

The cover graphics are solely for illustration and forms no part of any oﬀer for sale or any sale contract. The manufacturer

reserves the right to change the design at any time without notice.

Contents

1  SAFETY CONSIDERATIONS .................................................................................................................................................3

1.1 - General ..............................................................................................................................................................................................................................3

1.2 - Avoid electrocution.......................................................................................................................................................................................................3

2  GENERAL DESCRIPTION......................................................................................................................................................3

2.1 - General ..............................................................................................................................................................................................................................3

2.2 - Abbreviations used.......................................................................................................................................................................................................3

3  HARDWARE DESCRIPTION..................................................................................................................................................3

3.1 - General ..............................................................................................................................................................................................................................3

3.2 - Electrical supply to boards .........................................................................................................................................................................................4

3.3 - Light emitting diodes on boards..............................................................................................................................................................................4

3.4 - The sensors.......................................................................................................................................................................................................................4

3.5 - The controls .....................................................................................................................................................................................................................4

3.6 - Connections at the user terminal block ................................................................................................................................................................4

4. SETTING UP CONTROL SYSTEM4.1  GENERAL FEATURES...............................................................................................6

4.2 - Default screen characteristics ...................................................................................................................................................................................6

4.3 - Password screens...........................................................................................................................................................................................................6

4.4 - Menu screen characteristics ......................................................................................................................................................................................6

4.5 - Data screen or conﬁgurable parameter characteristics...................................................................................................................................6

4.6 - Parameter modiﬁcation...............................................................................................................................................................................................7

4.7 - Operating mode screen...............................................................................................................................................................................................7

4.8 - Menu tree structure ......................................................................................................................................................................................................8

4.9 - Detailed menu description ........................................................................................................................................................................................9

5  CONTROL OPERATION.......................................................................................................................................................16

5.1 - Start/stop control....................................................................................................................................................................................................... .16

5.2 - Heating/cooling/standby operation................................................................................................................................................................... .16

5.3 - Heat exchanger water pump control ................................................................................................................................................................. .17

5.4 - Control interlock contact ........................................................................................................................................................................................ .17

5.5 - Control point ............................................................................................................................................................................................................... .17

5.6 - Capacity control ......................................................................................................................................................................................................... .18

5.7 - Demand limit............................................................................................................................................................................................................... .18

5.8 - Night mode.................................................................................................................................................................................................................. .18

5.9 - Control of a boiler...................................................................................................................................................................................................... .19

5.10 - Master/slave assembly .......................................................................................................................................................................................... .19

5.11 - Heating module (HDC) control........................................................................................................................................................................... .19

6  DIAGNOSTICS  TROUBLESHOOTING ..............................................................................................................................20

6.1 - General .......................................................................................................................................................................................................................... .20

6.2 - Displaying alarms .......................................................................................................................................................................................................20

6.3 - Resetting alarms......................................................................................................................................................................................................... .20

6.4 - Alarm codes ................................................................................................................................................................................................................. .21

6.4 - Alarm codes (cont.) ................................................................................................................................................................................................... .22

1  SAFETY CONSIDERATIONS

1.1 - General

Installation, start-up and servicing of equipment can be

hazardous if certain factors particular to the installation are not

considered: operating pressures, presence of electrical

components and voltages and the installation site (elevated

plinths and built-up up structures). Only properly qualied

installation engineers and highly qualied installers and

technicians, fully trained for the product, are authorised to

install and start-up the equipment safely. During all servic-ing

operations all instructions and recommendations which appear

in the installation and service instructions for the product, as

well as on tags and labels xed to the equipment and

components and accompanying parts supplied sepa-rately, must

be read, understood and followed.

• Apply all standard safety codes and practices.

• Wear safety glasses and gloves.

• Use the proper tools to move heavy objects. Move units

carefully and set them down gently.

1.2 - Avoid electrocution

Only personnel qualied in accordance with IEC (Inter-

national Electrotechnical Commission) recommendations may

be permitted access to electrical components. It is particularly

recommended that all sources of electricity to the unit be shut

off before any work is begun. Shut off the main power supply

at the main circuit breaker or isolator.

IMPORTANT: This equipment conforms to all applicable

codes regarding electromagnetic compatibility.

2  GENERAL DESCRIPTION

2.1 - General

The BW10 unit has one refrigerant circuit with one or two

compressors.

The unit has an electronic control system to regulate water-

cooled units with or without hydronic.

The control system has the following controls:

• Compressor start-up to control the water loop

• Fixed or variable-ow pumps to optimise the operation of

the refrigerant circuit

As standard, the control system offers three on/off commands:

• Local - on/off command using the keyboard

• Remote - wired on/off command using volt-free contacts

• Network - Carrier Comfort Network (CCN) on/off

command.

The command type is selected in advance by keyboard.

2.2 - Abbreviations used

The BW10 unit has one refrigerant circuit, called circuit A with

one or two compressors (A1, A2).

The following abbreviations are used frequently:

CCN Carrier Comfort Network

DHW Domestic hot water

HDC Heating device control

LED Light Emitting Diode

LEN Internal communication bus linking the main board

to the slave boards

SCT Saturated condensing temperature

SHC Space heating control

SST Saturated suction temperature

EXV Electronic expansion valve

PD-AUX Auxiliary input/output board

3  HARDWARE DESCRIPTION

3.1 - General

The control system consists of an NRCP2-BASE board and a

user interface.

All boards communicate via an internal LEN bus. The NRCP2-

BASE board continuously manages the information received from

the various pressure and temperature probes. The NRCP2-BASE

master board contains the program that controls the unit.

The user interface includes an alphanumeric seven-line display,

two LEDs with ve navigation keys as well as a contrast

control wheel.

Control board

3.2 - Electrical supply to boards

All boards are supplied from a common 24 V a.c. supply

referred to earth.

CAUTION: Maintain the correct polarity of the power supply

connection of the boards, to ensure that they are not

damaged.

In the event of a power supply interrupt, the unit restarts

automatically without the need for an external command.

However, any faults active when the supply is interrupted are

saved and may in certain cases prevent a circuit or unit from

restarting.

3.3 - Light emitting diodes on boards

All boards continuously check and indicate the proper

operation of their electronic circuits. A light emitting diode

(LED) lights on each board when it is operating properly.

• The red LED that ashes for a two-second period - one

second on, one second off - indicates correct operation. A

different rate indicates a board or a software failure.

• The green LED ashes continuously on all boards to show

that the board is communicating correctly over its internal

bus. If the LED is not ashing, this indicates a LEN bus

wiring problem.

• The orange LED of the master board ashes during any

communication via the CCN bus.

3.4 - The sensors

Refrigerant pressure sensors

Two types of electronic (high and low-pressure) sensors are

used to measure the suction and discharge pressure in each

circuit.

Water system pressure sensors

As an option, two electronic sensors are used to measure the

suction and the discharge pressure of the water pump. The

water ow rate is calculated, the unit is protected against water

ow losses and the pump is protected against cavitation (low

pump entering pressure).

Thermistors

The water temperature sensors are installed in the entering and

leaving side. Two optional water temperature sensors can be

used for master/slave assembly control (in the case of leaving

water control).

3.5 - The controls

Water circulation pumps

The controller can regulate each water heat exchanger pump and

takes care of automatic changeover between pumps. Variable-

ow pumps can control the heat exchanger temperature

difference or the water pressure difference.

Boiler

If there is a unit fault in the heating mode this output authorises

start-up and shutdown of a boiler.

Immersion heaters

The outputs of the AUX1 board permit control of the electric

resistance heaters. They are used as a supplementary heating

source in the heating mode.

3.6 - Connections at the user terminal block

3.6.1 - General description

The contacts below are available at the user terminal block on

the NRCP2-BASE boards. Some contacts can only be used if

the unit operates in remote operating type (Remote).

Contrast control

wheel

Back to the previous

screen

On/oﬀ key

- Unit stopped

- List of available operating

modes (only in local mode)

Green LED

Unit has stopped

Unit starts up

Unit in operation

Red LED

No alarm

Warning

Circuit or complete unit error

Up/Down key

- Navigation

- Modiﬁcation

Enter key

- Validation

- Selection access

Description Connector/

channel

Terminal Board Remarks

Contact 1: Start/stop J4/CH 8 32-33 NRCP2-BASE Used with the remote operating mode (Remote).

Contact 2: Heating/cooling selection J4/CH 9 63-64 NRCP2-BASE Used with the remote operating mode (Remote).

Contact 3: Demand limit selection 1 J4/CH 10 73-74 NRCP2-BASE

Customer safety loop input J4/CH 11A 34-35 NRCP2-BASE

Setpoint selection J5/CH 13 NRCP2-BASE Used with the remote operating mode (Remote), unit without NRCP2-SLAVE board.

Contact 3 bis: Demand limit selection

J5/CH 14 NRCP2-BASE Unit without NRCP2-SLAVE board.

Control, evaporator water pump J2B/CH 18 NRCP2-BASE -

Control, condenser water pump J2B/CH 22 NRCP2-BASE -

Alarm relay output J3/CH 24 30A-31A NRCP2-BASE -

Unit operation relay output J3/CH 25 37-38 NRCP2-BASE This output can be used to use a well pump

CCN network connection J12 NRCP2-BASE RS-485 series connection

- Pin 1: signal +

- Pin 2: ground

- Pin 3: signal -

Triac output for boiler command J2B/CH 20 NRCP2-BASE -

The following table summarises the connections at the user terminal block.

NRCP2-BASE control board Optional PD-AUX board

J2A

J2B

J12

3.6.2 - Volt-free contact on/oﬀ/cooling/heating

If the unit works in the remote operating mode (Remote) and

the automatic heating/cooling changeover function is not

selected and if the user conguration allows this (61WG or

30WG and Pro-Dialog interface selection) the operation of the

on/off and the heating/cooling contacts is as follows:

Without multiplexing

Oﬀ On cooling On heating

On/oﬀ contact Open Closed Closed

Heaing/cooling contact - Open Closed

With multiplexing

Oﬀ On cooling On heating On auto

On/oﬀ contact Open Closed Closed Open

Heaing/cooling contact Open Open Closed Closed

NOTE: The automatic changeover function (on auto)

selects the cooling or heating mode based on the outside

temperature (unit with outside temperature) - see chapter

5.2).

3.6.3 - Volt-free setpoint selection contact

Cooling Heating

csp 1 csp 2 hsp 1 hsp 2

Setpoint selection contact Open Closed Open Closed

3.6.4 - Volt-free demand limit selection contact

100% Limit 1 Limit 2 Limit 3

Demand limit 1 Open Closed Open Closed

Demand limit 2 Open Open Closed Closed

4. SETTING UP CONTROL SYSTEM4.1 - General features

The interface includes different screens that are listed below:

• Default screens with direct display of the main parameters,

• Menu screens for navigation,

• Data/conguration screens listing the parameters by type,

• Operating mode selection screen,

• Password entry screen,

• Parameter modication screen.

NOTE: If the interface is not used for a long period, it will go

black. The control is always active, the operating mode

remains unchanged. The interface screen is re-animated,

when the user presses a key. Pressing the key once illumi-

nates the screen, pressing the key a second time leads to a

screen that is related to the context and the key symbol.

4.2 - Default screen characteristics

There are four default screens. Each screen shows:

• The unit status, its screen number,

• Three displayed parameters.

LOCAL OFF 1 On the left the unit status, on the right

the screen number

Entering water temp Description of the ﬁrst parameter

term_ewt 17.2 °C Abbreviation and value with unit of

measurement of the ﬁrst parameter

Leaving water temp Description of the second parameter

term_lwt 17.2 °C Abbreviation and value with unit of

measurement of the second parameter

Control point Description of the third parameter

CTRL_PNT 12 °C Abbreviation and value with unit of

measurement of the third parameter

Pressing the Up or Down key changes one default screen to

another default screen. The screen number is updated.

4.3 - Password screens

Enter password Description of the password entry

screen

0_** Password value

(0 = basic access) Description

The password is entered digit by digit. The cursor is shown at

the current digit that ashes. The arrow keys modify the digit

value. The digit modication is validated with the Enter key and

the cursor is moved to the next digit.

Enter password

1_** The ﬁrst digit is 1, the cursor is

positioned on the second digit

(0 = basic access)

Enter password

11_**

(0 = basic access)

Pressing the Enter key at a digit without value validates the

overall selection of the password. The screen is refreshed by

the menu list, and the items displayed depend on the level of

the activated password.

The entry of an incorrect password keeps the password entry

screen.

Password selection 0 (zero) can simply be made by pressing the

Enter key twice in succession.

4.4 - Menu screen characteristics

\\MAINMENU Current path in the menu structure

GENUNIT PUMPSTAT Selection cursor to the left of the ﬁrst

column

TEMP RUNTIME

PRESSURE MODES Menu list

SETPOINT LOGOUT

INPUTS

OUTPUTS

General Parameters Menu Description of the menu framed by the

selection cursor

Each menu item denes the access to categorised data. The Up

and Down arrows position the cursor at the current item. The Enter

key activates the display of the selected sub-menu.

The item LOGOUT permits exiting from the menu screen and

protects access by a user password. The “Previous” key permits

exiting from the current screen without deactivating the

password-protected access.

4.5 - Data screen or conﬁgurable parameter

characteristics

The data screens display information parameters such as

temperatures or pressures. The conguration screens display unit

control parameters such as the water temperature setpoints.

\\MAINMENU\TEMP Current path in the menu structure

EWT 12.0°C List of items

LWT 7.0°C Cursor position

OAT 35.0°C

CHWSTEMP -17.8°C

HTWSTEMP -17.8°C

Leaving Water Temperature Description of the item framed by the

selection cursor

The Up and Down arrow keys position the cursor on the

current menu item. The Enter key activates the parameter

modication (if possible). Any non-pertinent modication

attempt is blocked by a refusal screen.

4.6 - Parameter modiﬁcation

A conguration parameter can be modied by positioning the

cursor and then pressing the Enter key.

\\MAINMENU\SETPOINT Current path in the menu structure

cps1 12.0°C List of items

cps2 12.0°C Cursor position

ice_sp 12.0°C

hps1 50.0°C

hps2 50.0°C

Cooling Setpoint 2 Description of the item framed by the

selection cursor

The following screen allows modication of a parameter.

Modify value Screen description

csp 2

12.0 °C Current value

_ °C Cursor position

Cooling Setpoint 2 Item description

The Up and Down arrow keys permit the selection of the rst

digit. Pressing the Up key successively scrolls up to the

following symbols:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ., -.

The Down key follows the reverse order of the Up key in

scrolling down the digit list above. Each digit is validated with

the Enter key.

The - sign is only accessible for the rst selected character.

Modify value Description of the screen

csp 2

12.0 °C Current value

11.5_ °C New value before validation

Cooling Setpoint 2 Item description

The value is validated with the Enter key. At any time the

return key cancels the current modication.

ATTENTION: If the user exits from the current data screen, the

value is saved. A saving conﬁrmation is displayed. The

Enter key validates the parameter modiﬁcation(s). The

Return to the Previous Screen key cancels the current

modiﬁcation(s).

\\MAINMENUSETPOINT Current path in the menu structure

Save changes? Conﬁrmation that the modiﬁcation is

saved

4.7 - Operating mode screen

The unit is in Local Off mode, pressing the on/off (0/1) key

once activates the display of the operating mode screen.

Select Machine Mode Description of the screen

Local On List of the machine operating modes

Local Schedule Cursor

CCN

Remote

The Up and Down keys position the cursor on the selected

operating mode. Four modes are immediately displayed on the

screen. To access operating modes that are not visible, please

use the Up and Down keys.

When the operating mode has been selected, the new operating

mode can be validated with the Enter key.

Command accepted Operating mode validation screen

When the unit is in an operating mode and the On/off key is

pressed, the unit will stop. A conrmation screen protects the

unit against inadvertent shutdowns.

PRESS ENTER Machine shutdown conﬁrmation

screen

TO CONFIRM STOP

GENUNIT

TEMP

PRESSURE

SETPOINT

INPUTS

OUTPUTS

PUMPSTAT

RUNTIME

MODES

ALARMS

CONFIG

LOGOUT

ALARMRST

CUR_ALRM

ALMHIST1

GENCONF

PUMPCONF

HCCONFIG

RESETCFG

USERCONF

SCHEDULE

HOLIDAY

BRODCAST

DATETIME

DISPLAY

HOLIDY01S

HOLIDY16S

HOLIDY02S

…

OCC1P01S

OCC1P02S

GENUNIT

TEMP

PRESSURE

SETPOINT*

INPUTS

OUTPUTS

PUMPSTAT

RUNTIME

MODES

ALARMS*

CONFIG

LOGOUT

ALARMRST

CUR_ALRM

ALMHIST1

GENCONF

PUMPCONF

HCCONFIG

RESETCFG

USERCONF

SCHEDULE

HOLIDAY

BRODCAST

DATETIME

CTRL_ID

OCC3P03S

HCCONFIG

HDC_CONF

HOLIDY16S

HOLIDY02S

HOLIDY01S

…

PUMPSTAT

HDC_STAT

OCC1P01S

OCC2P02S

4.8 - Menu tree structure

NAVIGATION

Password = "0"

ACCESS

ALL

USER

DEFAULT

SCREENS PASSWORD

General parameters

Temperatures

Setpoint

Outputs

Pump status

Unit status

Conﬁguration menu

Reset of the alarms

Alarm history

Holidays

Pump conﬁguration

Setpoint reset

Broadcast

Identiﬁcation control

LIST OF OPERATING

MODES

Schedule 1

Holidays 1

Holidays 16

Heating module status

Heating module conﬁguration

Schedule 3

4.9 - Detailed menu description

ATTENTION: Depending on the unit characteristics, certain menu items are not used.

4.9.1 - GENUNIT menu

NAME FORMAT UNIT DESCRIPTION

ctrl_typ 0/1/2 - Local = 0. CCN = 1. Remote = 2

STATUS Running/Oﬀ/Stopping/

Delay

- Operating status

ALM Normal/Partial/Shutdown - Alarm status

min_left 0-15 min Start-up delay

HEATCOOL Heat/Cool/Standby/Both - Heating/cooling status

LOCAL_HC 0/1/2 - Heating/cooling selection via the main interface

HC_SEL 0/1/2 - Heating/cooling selection via the CCN network

0 = cooling, 1 = heating, 2 = auto

LSP_SEL 0/1/2 - Setpoint selection via the main interface

SP_SEL 0/1/2 - Setpoint selection via the CCN network

0 = Auto 1 = Spt1 2 = Spt2

SP_OCC Yes/No - Occupied setpoint active

CHIL_S_S Enable/Disable - Unit start/stop via the CCN network

CHIL_OCC Yes/No - Unit time schedule via the CCN network

CAP_T nnn % Total unit capacity

CAPA_T nnn % Capacity circuit A

CAPB_T nnn % Capacity circuit B

DEM_LIM nnn % Demand limit value

SP ±nnn.n °C Current setpoint

CTRL_PNT ±nnn.n °C Control point

EMSTOP Enable/Emstop - CCN emergency stop

4.9.2 - TEMP menu

NAME FORMAT UNIT DESCRIPTION

CL_EWT ±nnn.n °C Evaporator entering water temperature

CL_LWT ±nnn.n °C Evaporator leaving water temperature

OAT ±nnn.n °C Outside air temperature

CHWSTEMP ±nnn.n °C Common master/slave temperature, evaporator

HTWSTEMP ±nnn.n °C Common master/slave temperature, condenser

DGT A ±nnn.n °C Discharge gas temperature A

SCT_A ±nnn.n °C Saturated condensing temperature A

SST_A ±nnn.n °C Saturated suction temperature A

SUCT_A ±nnn.n °C Suction gas temperature A

DGT_B ±nnn.n °C Discharge gas temperature B

SCT_B ±nnn.n °C Saturated condensing temperature B

SST_B ±nnn.n °C Saturated suction temperature B

SUCT_B ±nnn.n °C Suction gas temperature B

COND_EWT ±nnn.n °C Condenser entering water temperature

COND_LWT ±nnn.n °C Condenser leaving water temperature

DRY_LWT ±nnn.n °C Drycooler leaving water temperature

4.9.3 - PRESSURE menu

NAME FORMAT UNIT DESCRIPTION

DP_A ±nnn.n kPa Discharge pressure A

SP_A ±nnn.n kPa Suction pressure A

DP_B ±nnn.n kPa Discharge pressure B

SP_B ±nnn.n kPa Suction pressure B

4.9.4 - SETPOINT menu

NAME FORMAT VALUE UNIT DESCRIPTION

csp1 - 29.7 to 20 12.0 °C Cooling setpoint 1

csp2 - 29.7 to 20 12.0 °C Cooling setpoint 2

ice_sp - 29.7 to 20 12.0 °C Ice storage cooling setpoint

hsp1 20 to 50 50.0 °C Heating setpoint 1

hsp2 20 to 50 50.0 °C Heating setpoint 2

hsp3 20 to 55 50.0 °C Heating setpoint 3

hramp_sp 0.1 to 1.1 0.60 ^C Ramp loading

cauto_sp 3.9 to 50 24.0 °C Cooling changeover setpoint

hauto_sp 0 to 46.1 18.0 °C Heating changeover setpoint

lim_sp1 0 to 100 100 % Limit setpoint 1

lim_sp2 0 to 100 100 % Limit setpoint 2

lim_sp3 0 to 100 100 % Limit setpoint 3

cond_sp 0 to 60 38 °C Condensing setpoint, condenser

* 50, if the unit includes a variable-speed fan

4.9.5 - INPUTS menu

NAME FORMAT UNIT DESCRIPTION

ONOFF_SW Open/Close - Remote start/stop contact

HC_SW Open/Close - Remote heating/cooling contact

on_ctrl Oﬀ, On Cool, On Heat, On Auto - Current control

SETP_SW1 Open/Close - Remote setpoint contact 1

SETP_SW2 Open/Close - Remote setpoint contact 2

LIM_SW1 Open/Close - Remote demand limit contact 1

LIM_SW2 Open/Close - Remote demand limit contact 2

FLOW_SW Open/Close - Water ﬂow rate/customer safety loop contact

DIFF_SW Open/Close - Water ﬂow rate contact 2 (30WG)

4.9.6 - OUTPUTS menu

NAME FORMAT UNIT DESCRIPTION

CP_A1 On/Oﬀ - Compressor output A1

CP_A2 On/Oﬀ - Compressor output A2

CP_A3 On/Oﬀ - Compressor output A3

FAN_A 0-8 - Fan outputs, condenser A

exv_a 0-100 % EXV position circuit A

HD_POS_A 0-100 % Position variable speed controller fan A

RV_A On/Oﬀ - Four-way refrigerant valve

LLS_A On/Oﬀ - Liquid line solenoid valve A

CP_B1 On/Oﬀ - Compressor output B1

CP_B2 On/Oﬀ - Compressor output B2

FAN_B 0-8 - Fan outputs, condenser B

exv_b 0-100 % EXV position circuit B

HD_POS_B 0-100 % Position variable fan speed controller B

RV_B On/Oﬀ - Four-way refrigerant valve

LLS_B On/Oﬀ - Liquid line solenoid valve B

FAN_DRY 0-8 - Drycooler fan outputs

VFAN_DRY 0-100 % Position drycooler variable speed fan

3wv 0-100 % Three-way valve position

EHS_STEP 0-4 - Electric heater stages

ALARM On/Oﬀ - Alarm relay

RUNNING On/Oﬀ - Unit on relay

4.9.7 - PUMPSTAT menu

NAME FORMAT UNIT DESCRIPTION

CL_PUMP On/Oﬀ - Evaporator pump control

CL_WPIN ±nnn.n kPa Evaporator entering water pressure sensor

CL_WPOUT ±nnn.n kPa Evaporator leaving water pressure sensor

CL_WPCAL Yes/No - Evaporator water pressure sensor calibration?.Following a water pressure sensor error, CL_OFFST is

deconﬁgured (-99 kPa) to inform of the need to calibrate the water loop. This calibration must be made

while there is no water ﬂow in the machine

CL_OFFST ±nnn.n kPa Water pressure sensor calibration value

CL_FILTR nnn.n kPa Evaporator ﬁlter pressure drop

CL_WPMIN nnn.n kPa Minimum evaporator water pressure

CL_WFLOW ±nnn.n G/s Evaporator water ﬂow rate

CL_wdtsp nn.n ^C Evaporator temperature diﬀerence setpoint

CL_wdpsp nn.n kPa Evaporator pressure diﬀerence setpoint

CL_DvPos Nnn % Evaporator pump speed setpoint

CL_drvpwr ±nnn.n kW Evaporator pump power

CL_drvpI ±nnn.n A Evaporator pump current

CL_drvvs xxxxxxxx - Evaporator pump speed variable speed controller version

CL_dvTyp Xxxxxxxx - Evaporator pump variable speed controller type

CD_PUMP On/Oﬀ - Control condenser pump

CD_WPIN ±nnn.n kPa Condenser entering water pressure sensor

CD_WPOUT ±nnn.n kPa Condenser leaving water pressure sensor

CD_WPCAL Yes/No - Condenser water pressure sensor calibration? Following a water pressure sensor error, CD_OFFST is

deconﬁgured (-99 kPa) to inform of the need to calibrate the water loop. This calibration must be made

while there is no water ﬂow in the machine

CD_OFFST ±nnn.n kPa Condenser water pressure sensor calibration value

CD_FILTR nnn.n kPa Condenser ﬁlter pressure drop

CD_WPMIN nnn.n kPa Minimum condenser water pressure

CD_WFLOW ±nnn.n g/s Condenser water ﬂow rate

CD_wdtspt nn.n ^C Condenser temperature diﬀerence setpoint

CD_wdpspt nn.n kPa Condenser pressure diﬀerence setpoint

CD_DvPos Nnn % Condenser pump speed setpoint

CD_drvpwr +nnn.n kW Condenser pump power

CD_drvpl +nnn.n A Condenser pump current

CD_drvvs xxxxxxxx - Condenser pump speed variable speed controller version

CD_dvTyp Xxxxxxxx - Evaporator pump variable speed controller type

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