Mitsubishi Electric Evolution+ s-MEXT User manual

English
Control system
Evolution+Version ME38
s-MEXT
TECHNICAL MANUAL
Italian is the original language. The other languages versions are translation of the original.
For safe and correct use, carefully read this manual and the installation, use and maintenance manual
of the unit.
English

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Version 38

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Version 38
Keep this manual in a known and easily accessible place to refer to as necessary
during the entire life-span of the unit.
This Manual was prepared by MEHITS S.p.A.: reproduction, even in part, is prohibited.
The original copy is kept on file by MEHITS S.p.A.
Any use of the manual other than for personal reference requires the prior authorisation of
MEHITS S.p.A.
In the interest of improving the quality of its products, MEHITS S.p.A. reserves the right to
modify, without notice, the data and content of this Manual.
The information in this document may be modified without prior notice.
The reproduction and/or dissemination of this document, even in part, is prohibited without the
the written consent of MEHITS SpA.
Before carrying out any operation on the machine, you must carefully read this
manual and make sure you understand all the instructions and information given

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1......... INTRODUCTION............................................................................................................................................................ 9
1.1.... OPERATING REQUIREMENTS ............................................................................................................................................................................... 9
1.2.... GENERAL FUNCTIONS ........................................................................................................................................................................................... 9
1.3.... UNITS CONTROLLED............................................................................................................................................................................................ 10
2......... USER INTERFACE...................................................................................................................................................... 11
2.1.... USER TERMINAL ................................................................................................................................................................................................... 11
2.1.1 .... Technical features ........................................................................................................................................................................................... 11
2.1.2 .... Buttons functions............................................................................................................................................................................................. 12
2.1.3 .... Key LED management .................................................................................................................................................................................... 14
2.2.... GENERAL CHARACTERISTICS OF THE INTERFACE........................................................................................................................................ 14
2.2.1 .... Groups of masks and menu structure ............................................................................................................................................................. 14
2.2.2 .... Password management................................................................................................................................................................................... 18
2.2.3 .... Language management .................................................................................................................................................................................. 20
2.3.... STATUS DISPLAY MASKS.................................................................................................................................................................................... 22
2.3.1 .... Main loop ................................................................................................................................................................................................. 22
2.3.2 .... Unit Menu ................................................................................................................................................................................................. 26
2.3.3 .... In/Out Menu ................................................................................................................................................................................................. 31
2.3.4 .... Log Menu ................................................................................................................................................................................................. 33
2.4.... MAIN STATUS DISPLAY MASKS.......................................................................................................................................................................... 34
2.4.1 .... Main Mask ................................................................................................................................................................................................. 34
2.4.2 .... Active Functions Mask .................................................................................................................................................................................... 39
2.4.3 .... Safety Reduction Load mask, s-MEXT unit .................................................................................................................................................... 42
2.4.4 .... LAN APLMask ................................................................................................................................................................................................. 43
2.5.... PARAMETER CHANGING MASKS ....................................................................................................................................................................... 44
2.5.1 .... Access to parameter changing........................................................................................................................................................................ 44
2.5.2 .... [P10] Config. Menu.......................................................................................................................................................................................... 45
2.5.3 .... [P11] Functions Menu ..................................................................................................................................................................................... 48
2.5.4 .... [P12] Compressor Menu ................................................................................................................................................................................. 49
2.5.5 .... [P13] Valve Menu ............................................................................................................................................................................................ 50
2.5.6 .... [P14] Menu Safety........................................................................................................................................................................................... 51
2.5.7 .... [P15] Safety 2 Menu........................................................................................................................................................................................ 52
2.5.8 .... [P--] Default Menu ........................................................................................................................................................................................... 53
2.5.9 .... [P20] Regulations Menu .................................................................................................................................................................................. 53
2.5.10 .. [P21] Free Cooling Menu ................................................................................................................................................................................ 58
2.5.11 .. [P22] Settings Menu ........................................................................................................................................................................................ 60
2.5.12 .. [P22] Settings 2 Menu ..................................................................................................................................................................................... 65
2.5.13 .. [P23] Fan Menu............................................................................................................................................................................................... 65
2.5.14 .. [P24] Adjustments Menu ................................................................................................................................................................................. 68
2.5.15 .. P25] Demand Limit Menu................................................................................................................................................................................ 70
2.5.16 .. [P26] LAN Menu .............................................................................................................................................................................................. 71
2.5.17 .. [P--] Manual Menu........................................................................................................................................................................................... 74
2.5.18 .. [P27] Optional Menu........................................................................................................................................................................................ 76
2.5.19 .. [P28] Regulations 2 Menu............................................................................................................................................................................... 79
2.5.20 .. [P30] Serial Menu............................................................................................................................................................................................ 80
2.5.21 .. [P31] Alarm out Menu...................................................................................................................................................................................... 82
2.5.22 .. [P32] Scheduler Menu..................................................................................................................................................................................... 86
2.5.23 .. [P--] Info Menu................................................................................................................................................................................................. 86
2.5.24 .. [P33] Alarm out Menu 2................................................................................................................................................................................... 87
2.5.25 .. [P50] Setpoint Menu........................................................................................................................................................................................ 90
2.5.26 .. [P900] Clock Menu .......................................................................................................................................................................................... 91
2.6.... PARAMETER TABLE ............................................................................................................................................................................................. 96
2.6.1 .... Factory Group ................................................................................................................................................................................................. 96
2.6.2 .... Service Group ................................................................................................................................................................................................. 98
2.6.3 .... User Group ...............................................................................................................................................................................................106
2.6.4 .... Setpoint menu ...............................................................................................................................................................................................109
2.6.5 .... Clock menu ...............................................................................................................................................................................................109
2.6.6 .... Limiting parameters.......................................................................................................................................................................................117
2.7.... EVENTS MASKS ..................................................................................................................................................................................................118
2.7.1 .... Table of alarm and signalling events.............................................................................................................................................................119
2.7.2 .... PAC-IF013B-E board alarms table................................................................................................................................................................128
3......... START OF THE UNIT................................................................................................................................................ 130
3.1.... SOFTWARE UPLOAD..........................................................................................................................................................................................130
3.2.... UNIT POWER SUPPLY ........................................................................................................................................................................................ 130
3.3.... START OF VENTILATION....................................................................................................................................................................................130
3.4.... START OF AUTOMATIC ADJUSTMENT ............................................................................................................................................................132
3.5.... MANUAL MANAGEMENT ....................................................................................................................................................................................132

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4......... TEMPERATURE ADJUSTMENT CONSIDERATIONS ............................................................................................. 133
4.1.... MANAGEMENT OF THE LIMITS OF THE COOLING SETPOINT ......................................................................................................................133
4.2.... TEMPERATURE PROBES MANAGEMENT........................................................................................................................................................134
4.2.1 .... Configuration of the installed probes.............................................................................................................................................................134
4.2.2 .... Type of temperature calculation....................................................................................................................................................................135
4.2.3 .... Selection of the adjustment temperature ...................................................................................................................................................... 135
4.3.... SETPOINT OFFSET.............................................................................................................................................................................................. 136
5......... COOLING .................................................................................................................................................................. 138
5.1.... COOLING IN S-MEXT UNITS............................................................................................................................................................................... 138
5.1.1 .... Communication with the Mr Slim unit............................................................................................................................................................138
5.1.2 .... Connection to only one external Mr Slim unit................................................................................................................................................ 138
5.1.3 .... Connection to more than one external Mr Slim unit......................................................................................................................................138
5.1.4 .... Cold request generation................................................................................................................................................................................139
5.1.5 .... Lack of voltage ..............................................................................................................................................................................................141
5.1.6 .... Management of dehumidification .................................................................................................................................................................. 141
5.2.... MINIMUM DELIVERY TEMPERATURE LIMIT.....................................................................................................................................................142
5.2.1 .... Objectives ...............................................................................................................................................................................................142
5.2.2 .... Adjustment logic ............................................................................................................................................................................................142
6......... HEATING ................................................................................................................................................................... 143
6.1.... HEATING RESOURCES.......................................................................................................................................................................................143
6.2.... ON/OFF HEATING ELEMENT MANAGEMENT ..................................................................................................................................................143
6.3.... POST-VENTILATION FUNCTION FOR THE ELECTRIC HEATERS..................................................................................................................144
7......... ADJUSTMENT WITH TEMPERATURE PROVIDED BY THE SUPERVISOR .......................................................... 145
8......... DEHUMIDIFICATION................................................................................................................................................. 146
8.1.... DEHUMIDIFICATION START-UP.........................................................................................................................................................................146
8.2.... DEHUMIDIFICATION LIMITS ...............................................................................................................................................................................146
8.2.1 .... General considerations ................................................................................................................................................................................. 146
8.2.2 .... Upper limit ...............................................................................................................................................................................................147
8.2.3 .... Lower limit ...............................................................................................................................................................................................148
8.2.4 .... Combination of the limits ............................................................................................................................................................................... 149
8.2.5 .... Low dehumidification temperature limit.........................................................................................................................................................149
8.2.6 .... Timed dehumidification function....................................................................................................................................................................149
8.2.7 .... Post - heating 150
8.3.... DEHUMIDIFICATION SETPOINT LIMIT ..............................................................................................................................................................151
9......... HUMIDIFICATION...................................................................................................................................................... 153
9.1.... INTRODUCTION ...................................................................................................................................................................................................153
9.2.... INTEGRATED HUMIDIFIER .................................................................................................................................................................................153
9.2.1 .... Operating principle ........................................................................................................................................................................................153
9.2.2 .... Vapour production regulation ........................................................................................................................................................................154
9.2.3 .... Initial pre-wash of the lines and the cylinder ................................................................................................................................................. 154
9.2.4 .... Reset cylinder hour counter .......................................................................................................................................................................... 154
9.2.5 .... Dilution drain ...............................................................................................................................................................................................154
9.2.6 .... Periodic drain ...............................................................................................................................................................................................155
9.2.7 .... Drain due to inactivity .................................................................................................................................................................................... 155
9.2.8 .... Alarm management .......................................................................................................................................................................................156
9.2.9 .... Maintenance of the integrated dehumidifier ..................................................................................................................................................156
10 ....... TEMPERATURE AND HUMIDITY MEASUREMENT................................................................................................ 157
10.1 .. RETURN AIR T+H PROBE...................................................................................................................................................................................157
10.2 .. DELIVERY AIR T+H PROBE................................................................................................................................................................................ 157
10.3 .. REMOTE T+H PROBES .......................................................................................................................................................................................157
10.4 .. EXTERNAL T+H PROBE...................................................................................................................................................................................... 158
11 ....... INTERNAL AIR FAN MANAGEMENT....................................................................................................................... 158
11.1 .. INTRODUCTION ...................................................................................................................................................................................................158
11.2 .. STANDARD OPERATION .................................................................................................................................................................................... 158
11.3 .. MODULATION OPERATION................................................................................................................................................................................158
11.4 .. ECONOMY FUNCTION......................................................................................................................................................................................... 158
11.5 .. AUTOMATIC SPEED REGULATION FUNCTION ............................................................................................................................................... 159
11.5.1 .. Constant flow rate regulation......................................................................................................................................................................... 159
11.5.2 .. Constant residual ∆P regulation ...................................................................................................................................................................161
11.5.3 .. Calibrating the constant flow function............................................................................................................................................................ 163
11.5.4 .. Operation data display ..................................................................................................................................................................................163
11.6 .. COMMAND FROM SUPERVISOR ....................................................................................................................................................................... 164
11.7 .. MANAGEMENT OF INTERNAL FAN ALARMS ..................................................................................................................................................164
11.8 .. FAN ADJUSTMENT BASED ON TEMPERATURE (FORMER FAN SPECIAL FUNCTION 02) ........................................................................165
11.8.1 .. Fan adjustment based on return temperature............................................................................................................................................... 165

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11.8.2 .. Fan adjustment based on delivery temperature............................................................................................................................................ 165
11.8.3 .. Fan adjustment based on temperature differential........................................................................................................................................ 165
12 ....... DAMPER MANAGEMENT......................................................................................................................................... 167
12.1 .. DELIVERY DAMPER ............................................................................................................................................................................................167
12.2 .. DIRECT FREE COOLING DAMPER ....................................................................................................................................................................167
12.3 .. TEMPERATURE ADJUSTMENT IN UNITS WITH DIRECT FREECOOLING .....................................................................................................168
12.3.1 .. S-MEXT unit regulation with Direct Free Cooling.......................................................................................................................................... 168
12.4 .. ENABLE DIRECT FREE COOLING ..................................................................................................................................................................... 169
12.5 .. MAXIMUM HUMIDITY LIMIT ................................................................................................................................................................................ 169
12.6 .. DIRECT FREE COOLING OPERATION DURING COLD RESOURCE ALARM ................................................................................................ 170
12.7 .. DIRECT FREE COOLING STATUS DISPLAY MASK .........................................................................................................................................170
13 ....... CONTROL AND PROTECTION FUNCTIONS .......................................................................................................... 171
13.1 .. PRESSURE CONTROL ........................................................................................................................................................................................171
13.1.1 .. Safety Reduction Load function (LP)............................................................................................................................................................. 171
13.1.2 .. Frost-Free Function with low pressure probe................................................................................................................................................173
13.2 .. PERIODIC FORCING ON THE VENTILATION AND THE COLD DEMAND (PERIODIC CHECK) ....................................................................174
14 ....... ANALYSIS AND FUNCTIONS ON THE POWER SUPPLY NETWORK................................................................... 175
14.1 .. NETWORK ANALYSER ....................................................................................................................................................................................... 175
15 ....... MANAGEMENT OF DUAL SUPPLY......................................................................................................................... 176
16 ....... EVENT AND MAINTENANCE MANAGEMENT........................................................................................................ 176
16.1 .. ORIGIN OF EVENTS.............................................................................................................................................................................................176
16.2 .. THRESHOLD EVENTS .........................................................................................................................................................................................176
16.2.1 .. HT room high temperature alarm ..................................................................................................................................................................177
16.2.2 .. HHT hazardous high ambient temperature alarm.........................................................................................................................................177
16.2.3 .. Low room temperature alarm ........................................................................................................................................................................177
16.2.4 .. High room humidity alarm .............................................................................................................................................................................178
16.2.5 .. Low room humidity alarm .............................................................................................................................................................................. 178
16.2.6 .. Delivery high temperature alarm ...................................................................................................................................................................179
16.2.7 .. Delivery low temperature alarm.....................................................................................................................................................................179
16.2.8 .. Delivery high humidity alarm .........................................................................................................................................................................180
16.2.9 .. Delivery low humidity alarm........................................................................................................................................................................... 180
16.3 .. PAC-IF013B-E ALARMS ......................................................................................................................................................................................181
16.4 .. ALARM OR SIGNAL EVENTS ............................................................................................................................................................................. 182
16.5 .. SETTING DELAYS................................................................................................................................................................................................182
16.6 .. EVENT SIGNALLING RELAY .............................................................................................................................................................................. 182
16.6.1 .. Setting the output contact logic .....................................................................................................................................................................182
16.6.2 .. Output contact setting ................................................................................................................................................................................... 183
16.7 .. LOG .......................................................................................................................................................................................................................183
16.7.1 .. General information.......................................................................................................................................................................................183
16.7.2 .. Viewing the events log ..................................................................................................................................................................................183
16.7.3 .. Event log display - Service Level ..................................................................................................................................................................183
16.7.4 .. The events history mask ...............................................................................................................................................................................183
16.7.5 .. Deleting the events log..................................................................................................................................................................................183
16.8 .. BLACK BOX FOR EVENT LOG...........................................................................................................................................................................184
16.9 .. BLACK BOX FOR PARAMETERS....................................................................................................................................................................... 188
16.10. MAINTENANCE SIGNALS ...................................................................................................................................................................................188
17 ....... LOCAL LAN NETWORK MANAGEMENT................................................................................................................ 189
17.1 .. PURPOSE OF THE LOCAL LAN NETWORK .....................................................................................................................................................189
17.2 .. PRELIMINARY OPERATIONS .............................................................................................................................................................................189
17.2.1 .. Introduction ...............................................................................................................................................................................................189
17.2.2 .. Network cabling.............................................................................................................................................................................................189
17.2.3 .. Network configuration....................................................................................................................................................................................190
17.2.4 .. Addressing of the control board - From the board ........................................................................................................................................191
17.2.5 .. Addressing of the control board - from the user terminal ..............................................................................................................................191
17.2.6 .. Addressing of the user terminal.....................................................................................................................................................................192
17.2.7 .. Configuration of the terminals associated with the board .............................................................................................................................192
17.2.8 .. Network status display (NetSTAT) ................................................................................................................................................................193
17.3 .. SETTINGS ON THE USER TERMINAL ...............................................................................................................................................................193
17.4 .. INFORMATION EXCHANGED BETWEEN UNITS IN LAN .................................................................................................................................194
17.5 .. ELECTION OF PRIORITY CONTROLLER ..........................................................................................................................................................195
17.6 .. BACKUP UNIT MANAGEMENT (STAND-BY).....................................................................................................................................................196
17.6.1 .. Introduction ...............................................................................................................................................................................................196
17.6.2 .. Rotation management ...................................................................................................................................................................................196
17.6.3 .. Reserve units activation mode ......................................................................................................................................................................196
17.6.4 .. Backup unit activation events........................................................................................................................................................................197
17.6.5 .. Exceeding the limits ...................................................................................................................................................................................... 197

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17.7 .. ACTIVE FAN ON STAND-BY ...............................................................................................................................................................................201
17.7.1 .. Introduction ...............................................................................................................................................................................................201
17.7.2 .. Operation ...............................................................................................................................................................................................201
17.8 .. TEMPERATURE AND HUMIDITY AVERAGE MANAGEMENT..........................................................................................................................203
17.8.1 .. Introduction ...............................................................................................................................................................................................203
17.8.2 .. Average calculation .......................................................................................................................................................................................203
17.8.3 .. Enable the use of the averagne ....................................................................................................................................................................203
17.9 .. H&L LOCAL TEMPERATURE PROTECTION..................................................................................................................................................... 204
17.10. ACTIVE PRESSURE LOAD (APL).......................................................................................................................................................................206
17.11. H&L LOCAL PRESSURE PROTECTION ............................................................................................................................................................208
17.12. LAN ALARM MANAGEMENT ..............................................................................................................................................................................210
17.12.1 . Preliminary considerations ............................................................................................................................................................................210
17.12.2 . Management algorithm.................................................................................................................................................................................. 210
17.12.3 . Examples ...............................................................................................................................................................................................211
17.12.4 . Consequences of the alarm .......................................................................................................................................................................... 212
17.13. SHARED USER TERMINAL ................................................................................................................................................................................. 213
17.13.1 . Connecting the remote keyboard ..................................................................................................................................................................213
17.13.2 . “T” shunt ...............................................................................................................................................................................................213
17.13.3 . Remote keyboard up to 200 metres..............................................................................................................................................................214
17.13.4 . Remote keyboard from 200 metres up to 500 metres................................................................................................................................... 215
17.13.5 . Remote keyboard for more than one unit...................................................................................................................................................... 216
18 ....... HARDWARE.............................................................................................................................................................. 217
18.1 .. HARDWARE ARCHITECTURE............................................................................................................................................................................217
18.2 .. PARTS................................................................................................................................................................................................................... 218
18.2.1 .. PCO5+ controllers.........................................................................................................................................................................................218
18.2.2 .. Other connected boards................................................................................................................................................................................219
18.3 .. MEANING OF THE LEDS.....................................................................................................................................................................................220
18.4 .. CONFIGURATION OF MODBUS DEVICES ........................................................................................................................................................ 221
18.4.1 .. Table of Modbus devices addresses.............................................................................................................................................................221
18.4.2 .. Configuration of the I/O expansions..............................................................................................................................................................222
18.4.3 .. Configuration of T+H probes .........................................................................................................................................................................222
18.4.4 .. PAC-IF013B-E board configuration...............................................................................................................................................................223
18.5 .. INPUT/OUTPUT I/CONFIGURATION TABLES ...................................................................................................................................................224
18.5.1 .. s-MEXT-G00 ...............................................................................................................................................................................................224
18.6 .. FUNCTIONS REQ. EXPANSIONS .......................................................................................................................................................................226
18.6.1 .. Overview ............................................................................................................................................................................................... 226
19 ....... ANNEXES.................................................................................................................................................................. 227
19.1 .. PID CONTROLLER CONTROL PARAMETERS.................................................................................................................................................. 227
19.1.1 .. Proportional Action ........................................................................................................................................................................................228
19.1.2 .. Integral Action ...............................................................................................................................................................................................228
19.1.3 .. Derivative Action............................................................................................................................................................................................229
19.1.4 .. The combined effect of the three actions ...................................................................................................................................................... 229
19.1.5 .. Anti-Windup control (control of integral error) ...............................................................................................................................................230
19.2 .. DEFINITION OF THE HUMIDIFIER'S CONFIGURATION PARAMETER ........................................................................................................... 231

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SYMBOLS
A number of symbols are used to highlight some parts of the text that are of particular importance. These are described below.
WARNING:
Information on the occurrence of situations/operations which, if ignored or not duly acted upon,
could put not only the Unit but also the functions of the Software and the various electronic parts at
risk.
OBLIGATION:
Indicates the need to take appropriate precautions/perform specific operations to avoid compromising
protection of the points of access reserved for authorised operators and/or operators who guarantee
the proper operation of the Unit.
INFORMATION:
Indicates technical information of particular importance which should not be neglected.
NOTICE:
This is used to address practices not connected with possible physical injury.

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1 INTRODUCTION
1.1 Operating requirements
The software described in this document was designed for use with precision air-conditioning units such as “Close Control” units
(for data processing centres).
The software was designed for use on the following control systems:
•Control board EVOLUTION+ –Small with user terminals and PGD1 graphic interface.
•Control board EVOLUTION+ –Medium with user terminals and PGD1 graphic interface.
•Control board EVOLUTION+ –Large with user terminals and PGD1 graphic interface.
1.2 General functions
Below is a non-exhaustive list of the functions of the application:
•Adjustment of room temperature and humidity according to the setpoints entered using the user terminal.
•Complete visualisation of the operating status of the unit.
•Possibility of setting the adjustment parameters. Possibility of setting both the fundamental ones, by entering the
“User” password, and the more advanced ones, by entering the “Service” and “Factory” password (Manufacturer).
•Possibility of manually managing (manual override) all the unit devices.
•Management and acoustic and visual signalling (visual only by default) of faults (alarms), events and maintenance. It
can store up to 200 events.
•Possibility of serial control and management.
•Possibility of operation of up to 10 units connected together in a local LAN network. Even with one or two backup units
rotating on a time basis.
INFORMATION:
The EVOLUTION+ controller software is protected by a digital signature.
This means that it can only work on boards supplied by MEHITS and not on boards purchased from
other dealers.

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1.3 Units controlled
The software in question can be installed on the following version of air-conditioning units:
Type and diagram
Description
Unit code
Features
SPLIT TYPE
These direct expansion
units use refrigerant for
the transfer of heat. The
air in the room is,
therefore, treated in the
evaporating coil where
the refrigerant flows.
The condensation heat is
dumped by a Mr. Slim
external air condensing
unit with inverter
compressor.
s-MEXT
•Direct expansion coil to use in
combination with the Mr. Slim
condensing unit
•EC fans

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2 USER INTERFACE
2.1 User terminal
2.1.1 Technical features
The user interface comprises:
•132x64 pixel backlit LCD display (22 columns, 8 rows).
•6 backlit buttons.
The connection between the microprocessor board and the user terminal involves a 4-pole telephone cable equipped with RJ11
jack connector. The terminal is fed directly from the control board via this cable.
Figure 2-1: user terminal representation.
INFORMATION:
If the terminal is equipped with an acoustic warning, this is activated each time the number of active
alarms increases.
To deactivate it, simply access the active alarms mask.
It deactivates automatically when there are no more active alarms.

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2.1.2 Buttons functions
Key
Name
Function
[ALARM]
•Everywhere:accesses the Event menu where
alarm and signalling events are displayed.
•In the "Event" menu: restores the normal
condition.
[PRG]
•In the main loop: accesses the “Main” group.
•In the groups: Accesses the selected menu
or group
•In the menus: returns to the group to which
the menu belongs.
[ESC]
•In the main loop and in the "Main" group:
returns to the main mask.
•In other groups: returns to the previous
group.
•In the menus: returns to the group to which
the menu belongs.
[UP]
•Everywhere: move around the masks and
modify settable parameter values.
[DOWN]
[ENTER]
•In masks with a flashing cursor: accesses
the parameters that can be set and confirms
the changes made.
•In the groups: accesses the selected menu
or group.
Table 1: list of keys and related functions
Key combinations activate a set of specific functions:
Keys
Name
Description
+ +
[ALARM +
PRG + UP]
•Increase or decrease screen contrast.
+ +
[ALARM +
PRG + DOWN]

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+
[ALARM +
ESC]
•In the shared keyboard mode, this
combination allows to share screenshots and
parameters among LAN connected units.
+ +
[UP + ENTER
+ DOWN]
.
•Press for 5 seconds to set the LAN address of
the user terminal.
+
[ALARM +
ESC]
•In the shared keyboard mode, this
combination allows to share screenshots and
parameters among LAN connected units.
Table 2: list of key combinations and related functions.

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2.1.3 Key LED management
The key led indicators turn on in the following instances:
Keys
Name
Description
[ALARM]
The LED is fixed in case of alarm and flashing in
case of signal.
Once the [ALARM] key is pressed, the LED
becomes fixed.
The LED is off if there are no active events.
[PRG]
•The LED is fixed when the unit is operating
(ventilation ON).
[ESC]
The LEDs are fixed in the following cases:
•when any key is pressed;
•when an alarm or signal is triggered.
The LEDs will disengage along with the rear-
lighting of the screen after 3 minutes of inactivity
on the keyboard of the user terminal.
[UP]
[ENTER]
[DOWN]
Table 3: list of led indicators and related meaning
2.2 General characteristics of the interface
2.2.1 Groups of masks and menu structure
The tree structures for moving around the various menus of the controller are shown below.
Within the main loop or the different menus, indicated in italics, the [UP] and [DOWN] keys allow you to scroll through the
different masks present.
Within the groups, indicated in bold, the [UP] and [DOWN] keys allow you to scroll through the various choices in the list.
Main
Loop
Main
Group
Power ON
[ESC]
[PRG] Event
Menu
[ESC]
[ALARM]
Figure 2-2: basic movement tree.

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User
Selection
User
Password
Service
Password
Unit
Selection
Setpoint
Selection
In/Out
Selection
Clock
Selection
Service
Selection
[ESC]
[ESC]
  
  
  
  
[ESC]
[ESC] User
Group
Service
Group
Setpoint
Menu
In/Out
Menu
Clock
Menu
[ESC]
[ESC]
[ESC] / [ENTER] [ENTER]
[ENTER]
[ESC] / [ENTER]
[ESC] / [ENTER]
[ESC] / [ENTER]
Unit
Menu
  
[ESC]
[ESC]
[ESC] / [ENTER]
[ESC] / [ENTER]
  
History
Selection
[ESC] History
Menu
[ESC] / [ENTER]
  
Factory
Password
Factory
Selection
[ESC] Factory
Group
[ESC] / [ENTER] [ENTER]
   [ESC]
Main
Group
Main
Loop
Figure 2-3: tree for moving around the “Main” group.
•The “Unit” menu displays the following information: temperature, pressure and circuit states.
•The “Setpoint Menu” is used to set the setpoints for the various available functions.
It is possible to set different setpoints depending on the available function modes (heat resources present, humidifier
present, and dehumidifier present, etc.).
•The “In/Out menu” shows the status of the digital inputs and values read from the analogue inputs.
It also shows the status of the digital outputs and the voltage supplied to the analogue outputs.
If I/O expansions are present (depending on the configuration parameters), the inputs and outputs of the latter are also
shown.
•The “Clock” menu is used to set and display the date and time and configure the time bands.
•The “Log menu” is used to display the list of alarm events recorded by the unit.
•In the “User” group there are menus in which it is possible to display and set parameters related to the user
programming of the unit.
•In the “Service” group there are menus in which it is possible to display and set parameters for the service
configuration of the unit.
•In the “Factory” group there are menus in which it is possible to display and set parameters for the manufacturer's
configuration of the unit.

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Main
Group
Serial
Selection
Alarm out
Selection
Scheduler
Selection
Info
Selection
[ESC]
  
  
  
[ESC]
Alarm out
Menu
Scheduler
Menu
Info
Menu
[ESC]
[ESC]
[ESC] / [ENTER]
[ESC] / [ENTER]
[ESC] / [ENTER]
Serial
Menu
[ESC] / [ENTER]
  
Alarm out2
Selection
[ESC] Alarm out 2
Menu
[ESC] / [ENTER]
  
User
Group
Figure 2-4: “User” group navigation tree menu.

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Version 38
Main
Group
Dem.Limit
Selection
Regulat.
Selection
FreeCool.
Selection
Settings
Selection
Fan
Selection
LAN
Selection
[ESC]
[ESC]
  
  
  
  
[ESC]
[ESC]Demand Limit
Menu
LAN
Menu
Free Cooling
Menu
Settings
Menu
Fan
Menu
[ESC]
[ESC]
[ESC] / [ENTER]
[ESC] / [ENTER]
[ESC] / [ENTER]
[ESC] / [ENTER]
Regulations
Menu
  
[ESC] / [ENTER]
[ESC] / [ENTER]
  
Adjustm.
Selection
[ESC]Adjustments
Menu
[ESC] / [ENTER]
  
Manual
Selection
[ESC]Manual
Menu
[ESC] / [ENTER]
  
Optional
Selection
[ESC]Optional
Menu
[ESC] / [ENTER]
  
Regulat.2
Selection
[ESC]Regulations 2
Menu
[ESC] / [ENTER]
  
Service
Group
History
Selection
[ESC]Log
Menu
[ESC] / [ENTER]
  
Figure 2-5: tree for moving around the “Service” group.

18
Version 38
Main
Group
Config.
Selection
Functions
Selection
Compress.
Selection
Valve
Selection
[ESC]
  
  
  
[ESC]
Functions
Menu
Compressor
Menu
Valve
Menu
[ESC]
[ESC]
[ESC] / [ENTER]
[ESC] / [ENTER]
[ESC] / [ENTER]
Config.
Menu
[ESC] / [ENTER]
  
Safety
Selection
[ESC]Safety
Menu
[ESC] / [ENTER]
  
Default
Menu
[ESC] / [ENTER]
  
Default
Selection
[ESC]
Safety 2
Selection
[ESC]Safety 2
Menu
[ESC] / [ENTER]
[ESC]
  
  
Factory
Group
Super User
Menu
Super User
Password
[ESC] / [ENTER] [ENTER]
[ESC]
Super User
Selection
Figure 2-6: “Factory” group navigation tree menu.
Access to the “User”, “Service” and “Factory” groups is by means of passwords, the management of which is explained in
the following chapter.
2.2.2 Password management
There are three menu groups that may be accessed upon entering a numeric password. Their access levels are as follows:
•“User” password, for the user.
•“Service” password, for maintenance and assistance operators.
•“Factory” password, for the sole and exclusive use of the manufacturer’s employees (not to be disclosed externally).
Some clarifications are given below:
•To enter the password, type every single digit in the set order from left to right.
•To move from one digit to the next press [ENTER].
•To go back one digit just press [ESC]. If the cursor should be on the first digit to the left, then this brings back to the
main window.
Below are the values of the “User” password, the “Service” password and the “Factory” password.

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Version 38
“User” Password
1234
(modifiable)
“Service” Password
9990
(modifiable)
“Factory” Password
0000009982
(modifiable)
The “Factory” password is managed using the Service software, which for each controller configures a password, which is
then saved in the job. The password is only available to the after-sales service.
Once at the last digit of the password, by pressing the [ENTER] key the software will compare the entered password with those
stored in its memory. If the password entered is incorrect, the "Wrong Password” message is displayed for a few seconds. All
the fields are cleared and the cursor moves back to the first entry position to the left.
To go back with the cursor to the previous password digit, just press the [ESC] key. It is then possible to return to the menu
selection.
To change the “User” password access the “Info” menu inside the “User” group and scroll the masks until the “User”
password change mask appears.
Info - Pwd change
Insert a new
User password:
0000
The window to change the “Service” password, which can be accessed by entering the “Settings” menu, under the “Service”
group.
The window to change the “Factory” password can be accessed from the “Config” menu”, under the “Factory” group.
OBLIGATION:
If the “Factory” password is changed, remember to re-enter the password generated by the
service software at the end of the test, after maintenance is completed.
INFORMATION:
The parameters in the menus of the “Factory” group can only be changed after switching off
the unit (fan OFF).

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Version 38
2.2.3 Language management
The controller pCO5+ has an additional memory containing all the supported languages.
During programming, all the languages are loaded to the controller and the end user can select the language to display.
The table below shows the languages available and their international codes:
English
Italian
German
Spanish
French
Swedish
Portuguese
Polish
Russian
Norwegian
Turkish
Greek
Chinese
EN
IT
DE
ES
FR
SV
PT
PL
RU
NO
TR
EL
ZH
To select any of the available languages, proceed as follows:
1)
Press [ALARM] and [ENTER] together. Hold them down until the mask shown to
the side appears.
> SYSTEM INFORMATION
LOG DATA
OTHER INFORMATION
FLASH/USB MEMORY
2)
Press [UP] and [DOWN] to move the cursor “>” to the “FLASH/USB MEMORY”
row and press [ENTER] to confirm the selection.
SYSTEM INFORMATION
LOG DATA
OTHER INFORMATION
> FLASH/USB MEMORY
3)
Press [UP] and [DOWN] to move the cursor “>” to the “NAND FLASH FILE” row
and press [ENTER] to confirm the selection.
> NAND FLASH FILE
USB PEN DRIVE
4)
The mask shown at the side will appear, to confirm access to the “FLASH NAND
FILES” menu. Press [ESC] to exit the menu without changing the language.
Press [UP] and [DOWN] to scroll between the various files available.
[ ]
ME38r00xEN.iup
5)
To select the files for the desired language, press [ENTER]. The displayed file is
then selected and an "X" appears in square brackets.
Press [ENTER] again to deselect the file.
[X]
ME38r00xEN.iup
6)
Files with “.iup” extensions concern the language.
The “.bin” file concerns the application.
The “.grp” file concerns the graphic resources.
[ ]
ME38r00x.grp
7)
It is necessary to select exclusively an “.iup” file depending on the language
that you want to display (refer to the table showing the languages and
international language codes).
[X]
ME38r00xEN.iup
8)
Select the “.bin” file.
[X]
ME38r00x.bin
9)
Select the “.grp” file.
[X]
ME38r00x.grp
10)
After selecting one of the “.iup” files, the “.bin” file and the “.grp” file, press [UP]
or [DOWN] to find the mask on the side and press [ENTER].
Press Enter
to start copying
10b)
When requested by the mask at the side press [ENTER] and leave “NO”
indicated.
This mask only appears in large size software versions. Therefore it may not
appear.
Erase Log data?
NO
press
ENTER to conf.
11)
The mask on the side will appear, indicating that the files are being copied.
copy process
is running
12)
At the end of the installation process, the mask on the side appears to confirm
successful copying.
ok, copy completed.
wait for restart
13)
During the process, messages such as “I/O BOARD FAULT” and “NO LINK” may
appear.
This is caused by the application restart process. The messages will disappear
after a few seconds.
I/O BOARD FAULT
NO LINK