AERMEC WRC User manual

EN
5389591_01
USER MANUAL
WRC

Contents
Wired panel - MVA unit................................................................................................................... 1
User interface (display).................................................................................................................. 1
User interface (buttons)................................................................................................................. 4
Dimensions of the wired panel: ................................................................................................... 5
Serial connection: ......................................................................................................................... 5
Installing the wired panel .............................................................................................................. 5
Examples of serial connection between wired panel and indoor unit: .................................... 6
Functions available from wired panel .......................................................................................... 9
Switching the indoor unit ON and OFF: ................................................................................................................ 9
Modifying the operating mode for the indoor unit:.............................................................................................. 10
Modifying the operating temperature: ................................................................................................................ 11
Modifying fan speed: .......................................................................................................................................... 11
Modifying the programmed ON/OFF timer (COUNTDOWN mode):................................................................... 12
Set system time (only used in CLOCK mode): ................................................................................................... 13
Modifying the programmed ON/OFF timer (CLOCK mode): .............................................................................. 14
Set delivery fin SWING:....................................................................................................................................... 16
Set QUIET function (reduces the noise generated by the indoor unit):.............................................................. 17
Set Night-Time Comfort function:........................................................................................................................ 18
Set the DISPLAY function on the indoor unit (led and two-figure display):......................................................... 19
Set the ENERGY SAVING function (active on indoor unit):................................................................................. 20
Set indoor unit FILTER CLEANING alarm: .......................................................................................................... 21
Set the X-FAN function on indoor unit:................................................................................................................ 22
Set the ANTIFREEZE function on indoor unit:..................................................................................................... 23
Set key lock on wired panel:............................................................................................................................... 24
Display indoor unit OPERATING PARAMETERS:................................................................................................ 25
List of operating parameters (read-only data):................................................................................................... 26
Activation of indoor unit OPERATING PARAMETER modification menu:............................................................ 28
Display operating errors or system messages:......................................................................... 31

4
Wired panel - MVA unit
The wired panel of the MVA unit allows display and rapid setting of the
machine's operating parameters. The card stores all the default set-
tings and any modifications. After the absence of voltage for any period
of time, the unit is able to start up again automatically, maintaining the
original settings.
The user interface comprises an LCD display with icons used to dis-
play information and available functions about the units; the user may
interact with the panel using the function keys located in the lower part
of the panel itself.
Wired panel - MVA unit
User interface (display)
1 2 3 4 5 6 7 8 9 10
11 12
13
14
14
15 16
16
17
18
29
19
30
20
31
21
32
22
33
23
34
24
35
25
36
26
37
27 28
38

5
Alarm Function Function available
on models
1Function not available ---
2Function not available ---
3Function not available ---
4Indicates that AUTOMATIC mode is active (only available on the MASTER unit) All models
5Indicates that COOLING mode is active (only available if the MASTER unit is set with a
compatible mode): COOLING, DEHUMIDIFICATION) All models
6Indicates that DEHUMIDIFICATION mode is active (only available if the MASTER unit is set
with a compatible mode): COOLING, DEHUMIDIFICATION) All models
7Indicates that VENTILATION ONLY mode is active All models
8Indicates that HEATING mode is active (only available if the MASTER unit is set with the
same mode): All models
9Function not available ---
10 Function not available ---
11 Indicates that the SWING function (motor-driven fins) is active All models except
canalised systems
12 Function not available ---
13 Indicates the current fan setting All models
14 These icons are displayed when setting operating parameters; they indicate the maxi-
mum (when setting the heat limit) or minimum (when setting the cool limit) values All models
15 During normal unit operation, the temperature setting in use is displayed All models
16 Indicates the unit of measure used to indicate the temperature settings All models
17 This group of icons depicts the functions and information associated with the system time
or the options associated with the unit ON/OFF timer All models
18 If this icon is displayed, it Indicates that the SLEEP function is active All models
19 Function not available ---
20 Indicates that Quiet Operation mode is active All models
21 If fitted, it indicates that wired panel backlighting is active All models
22 Function not available ---
23 Function not available ---
The following table indicates which functions match the various icons available on the wired panel's LCD display:

6
24 Function not available ---
25 Indicates that the key lock function is active on the panel All
26 Indicates that energy saving mode is active on the indoor unit connected All
27 Indicates that the wired panel is a slave (i.e. two wired panels are connected to the
indoor unit: one master and one slave) All
28 Indicates that an attempt has been made to use a locked panel using monitoring soft-
ware (MVA MONITORING) All
29 Indicates that the outdoor unit is operating in “safe” mode All
30 This icon appears in order to indicate that the filter on the indoor unit must be cleaned All
31 Function not available ---
32 Indicates that the X-Fan function is active on the unit (this functions dries the coil in cool
or dehumidification mode) All
33 Function not available ---
34 Indicates that the outdoor unit is currently defrosting All
35 This icon indicates that the panel was disenabled by a remote controller (zone control,
mains control or MVA MONITORING software) All
36 This icon indicates that the wired panel controls several indoor units (a group) All
37 Indicates that the Indoor unit is resuming the settings stored in memory (this event occurs
after a black-out) All
38 Indicates that the indoor unit connected to the panel is the system MASTER All

7
User interface (buttons)
Alarm Function
1Selects or Cancels desired function
2Sets night-time comfort mode
3Activates or de-activates certain extra functions
4Sets data for unit timers
5This button is used to decrease the selected data or pass to the previous data
6Sets fan speed:
7Sets the operating mode for the unit:
8Sets automatic delivery fin oscillation (on units where this is envisaged)
9Switches indoor unit ON/OFF
10 This button is used to increase the selected data or pass to the next data
1 25
3 4
6 710
8 9

8
Serial connection:
The wired panel communicates with the Indoor unit through a serial port; it is possible to select several Indoor unit management
configurations using the wired panel:
SINGLE connection, where the unit (or group of units)
is managed by a single wired panel:
A
DUAL connection, where the unit (or group of units)
is managed by two wired panels, one of which is the
MASTER and the other is the SLAVE:
B
Outdoor unit
Indoor unit
Wired panel
Outdoor unit
Indoor unit
Wired panel
(MASTER)
Wired panel
(SLAVE)
Installing the wired panel
112 22 35,5 42,5 34
112
83 1613
3 5
5
R2,7
R2,7
R2,7
R3,3
[mm]
WARNING: MVA SYSTEMS MUST HAVE A MASTER ONLY ONE) FOR CORRECT MANAGEMENT
OF THE OPERATING MODES.
FOR THE SETTING PROCEDURE, REFER TO THE SPECIFIC SECTION.
Dimensions of the wired panel:

9
Outdoor unit
Indoor unit (A) Indoor unit (B) Indoor unit (n)
Wired panel (A) Wired panel (B) Wired panel (n)
1
3
2
5
4 6
WARNING
2, 4, 6≤250m
Outdoor unit
Indoor unit (A) Indoor unit (B) Indoor unit (n)
Wired panel
1
3
2
5
4 6
WARNING
2+ 4+ 6≤250m
The first serial connection possibility envisages a panel (re-
minder: each individual unit of group of units can be man-
aged by a single panel or by two panels connected to the
same Indoor unit in MASTER/SLAVE mode, as indicated in the
previous page) for each unit; this solution allows customised
settings for the timer, setpoint and ventilation speed for each
Indoor unit;
Examples of serial connection between wired panel and indoor unit:
The second serial connection possibility envisages only one
panel (reminder: each individual unit of group of units can be
managed by a single panel or by two panels connected to
the same Indoor unit in MASTER/SLAVE mode, as indicated in
the previous page) for the overall group of units (a group may
comprise max. 16 units); this solution allows unique settings
for the timer, setpoint and ventilation speed for all the Indoor
units in the group;

10
The first operation needed to install the wired
panel is to open it using a flat screwdriver by
pressing in the specific slot on the base of the
panel.
After opening the wired panel, separate the front part from the rear body.
Mount the body securely on the wall (in the position spe-
cifically chosen during the plant design stage) using the
screws supplied with the equipment; before securing
the panel, remember to pass the communication ca-
ble (not supplied) through the rear hole in the body as
shown in the figure.
NB The features of the communication cable are
given in the following table.
Type of cable Max length Diameter Notes
Standard 2-pole cable with
PVC sheath
(60227 IEC 52 / 60227 IEC 53)
250 metres from 2x0.75 to 2x1.25mm2Serial communication cable
NOT supplied with the equipment
Connect the serial cable terminals (stripped as required) to the
screw terminals on the panel board; after tightening appropriately,
secure the cable using the cable clip as shown in the figure.
1 2
3 4
Wired panel installation procedure:

11
After connecting the serial cable, close the panel again by aligning the upper and lower bodies and pressing until the upper
body hooks up with the lower body.
5
Notes for installing the wired panel It is advised not to install the wired panel where it may
come into contact with water or direct sunlight; it is also advised to avoid installation too close
to sources of intense heat.
WARNING: MVA SYSTEMS MUST HAVE A MASTER ONLY ONE) FOR CORRECT MANAGE-
MENT OF THE OPERATING MODES.
FOR THE SETTING PROCEDURE, REFER TO THE SPECIFIC SECTION.

12
Functions available from wired panel
Switching the indoor unit ON and OFF:
Indoor unit ON Indoor unit OFF
The Indoor unit (or group of indoor units) managed by the wired panel is/are turned on and off using the ON/Off button; every
time it is pressed thereafter will switch the connect Indoor unit ON or OFF.

13
Modifying the operating mode for the indoor unit:
The operating mode of the Indoor unit (or group of indoor units) managed by the wired panel can be modified using the MODE
button; every time it is pressed thereafter will switch between one mode and the next (following the sequence indicated below);
available modes are:
Auto ( ): This function automatically selects the most suitable operating mode based on the indoor temperature; this
function does not allow any modifications to the setpoint (depending on the mode, default values will be chosen for hot and
cold settings, having respective values of 20°C and 26°C) while ventilation and functions such as “swing” (if available from the
Indoor unit model) are set as usual; while using this function, the icon for the selected mode will be displayed (hot or cold) as
will as the Auto mode icon.
Cooling ( ): This mode allows room air to be conditioned until the temperature chosen as the operating setpoint is reached;
this temperature may be between 16°C and 30°C;
Dehumidification ( ): This mode, in a similar way to the cooling mode, allows room air to be dehumidified: the operating
temperature may be between 16°C and 30°C;
Ventilation Only ( ): This mode does not allow any modifications to the setpoint, and does not cool or heat the room air; however,
it allows ventilation to be set as usual as well as the swing function (if available on the Indoor unit model);
Heating ( ): This mode allows room air to be heated until the temperature chosen as the operating setpoint is reached; this
temperature may be between 16°C and 30°C;
Auto
Cooling
Dehumidicaon
Venlaon Only
Heang
Operating logic for AUTO Mode ( ):
(A) (B)(C)
Indoor temperature (TEMP)
22°C 26°C
If TEMP ≤22°C, Heat Mode will be activated with a setpoint
of 20°C (setpoint can be chosen from parameter P38)
If 22°C < TEMP < 26°C, the last active mode will
be activated (but if this is the initial start-up, then
Ventilation Only mode will be selected)
If TEMP ≤26°C, Cool Mode will be activated with a setpoint
of 26°C (setpoint can be chosen from parameter P37)
WARNING: AUTO mode is ONLY
available on the Indoor unit
set as MASTER.

14
Modifying the operating temperature:
To modify the operating temperature, regardless of the operating mode (except for Ventilation Only which does not use the
operating setting), simply press the buttons ( ) or ( ) respectively to decrease or increase the operating setting by 1°C;
Operang temperature
Modifying fan speed:
The Ventilation speed (in all operating modes except for dehumidification) of the Indoor unit (or group of indoor units) managed
by the wired panel can be modified using the FAN button; every time it is pressed thereafter will switch between one speed and
the next (following the sequence indicated below);
Venlaon Speed
AUTO AUTOMATIC Speed
MINIMUM speed
MEDIUM/MINIMUM speed
MEDIUM Speed
MEDIUM/MAXIMUM Speed
MAXIMUM speed

15
WARNING: the system envisages two types of mer management:
• COUNTDOWN mode this mode manages programmed unit on-o operaons by specifying an “interval” (in hours) aer which
the unit will switch on or o;
• CLOCK mode: this mode manages programmed unit on-o operaons by specifying a me when the operaons will be per-
formed (in this case, the system clock is acvated and displayed);
To set the required management mode, use parameter P33 in the Parameters Menu (for more information, see
paragraph “operating parameters”); the default is: “COUNT DOWN”.
Modifying the programmed ON/OFF timer (COUNTDOWN mode):
To set programmed ON or OFF operations using the countdown mode, perform the following operations:
(1) Press the “TIMER” button (if the Indoor unit is ON, the procedure will set a countdown to switch the unit OFF, otherwise the
operations will set a time after which the unit will be switched ON); at this stage, the number of hours is shown after which the
ON or OFF operation will be performed (next to this number, the wording “HOUR” will begin to flash);
(2) press the ( ) or ( ) buttons, respectively to decrease or increase the counter by 0.5 hours;
(3) press the “TIMER” button again to save the settings; the wording “HOUR” will become steady;
WARNING: after saving data, pressing the “TIMER” button again will cancel the previous setting.
the icon begins
to ash
the icon becomes steady
(1) (2)
(3)
WARNING: once the unit is switched ON
using a mer funcon, it will resume the
funcons and sengs in use before the
system was switched o for the last me.

16
Set system time (only used in CLOCK mode):
To set the time on the system clock (only used if CLOCK mode is selected in the operating parameters, parameter P33), perform
the following operations:
(1) Press and hold down the “TIMER” button (5 seconds); at this stage, the symbol ( ) appears will flash to indicate that
system time modification mode has been selected;
(2) press the ( ) or ( ) buttons, respectively to decrease or increase the clock by 1 minute;
(3) press the “TIMER” button again or the “ENTER/CANCEL” button to save the time and exit the procedure;
the icon begins
to ash
(1) (2)
(3)
x 5 seconds

17
Modifying the programmed ON/OFF timer (CLOCK mode):
Clock mode is used to manage several functions:
(a) time band management: this function is used to set a switch ON time and a subsequent switch OFF times, thereby defin-
ing a time band within which the Indoor unit will operate;
(b) only programmed switch ON: this function is used to set a switch ON time for the unit;
(c) only programmed switch OFF: this function is used to set a switch OFF time for the unit;
To set clock mode functions, perform the following operations:
(1) With the unit ON, press the “TIMER” button; at this stage, the working “ON” appears and flashes to indicate the time when
the switch ON operation should be performed;
(2) press the ( ) or ( ) buttons, respectively to decrease or increase the switch on time by 0,5 hours;
(3) press the “TIMER” button to save the switch ON time, the wording “ON” remains steady, while the wording “OFF” appears
and flashes (to indicate that the switch OFF time must be entered);
(4) press the ( ) or ( ) buttons, respectively to decrease or increase the switch off time by 0,5 hours;
(5) press the “ENTER/CANCEL” button to save the time band settings and exit modify mode;
WARNING: after completing the entry of a time band, pressing the “TIMER” button again will activate cancel mode;
whenever the “TIMER” button is pressed, the system passes from “ON” time to “OFF” time (the time currently selected
will flash); after selecting the time to be cancelled, pressing the “ENTER/CANCEL” button will eliminate it.
this icon indicates
that CLOCK mode
is acve
To set the various funcons described at the beginning of this paragraph idened as (a), (b) and (c), the sequence of operaons
may be dierent; there follow the complete sequences for every funcon:
(a) me band management: (1) + (2) + (3) + (4) + (5);
(b) only programmed switch ON: (1) + (2) + (5);
(c) only programmed switch OFF: (1) + (3) + (4) + (5);
(1)

18
(2) (3)
(4) (5)
WARNING: once the unit is switched ON
using a mer funcon, it will resume the
funcons and sengs in use before the
system was switched o for the last me.

19
Set delivery fin SWING:
To set delivery fin swing (function NOT AVAILABLE on canalised models), simply press the “SWING” button; every time it is
pressed thereafter will switch between one function status to another (following the sequence indicated below);
SWING mode icon
Connuous SWING mode
SWING dis-enabled
SWING locked mode
(posion 1)
SWING locked mode
(posion 2)
SWING locked mode
(posion 3)
SWING locked mode
(posion 4)
SWING locked mode
(posion 5)

20
Set QUIET function (reduces the noise generated by the indoor unit):
The system envisages two different types of operation: “QUIET” and “AUTO QUIET”, which differ in terms of the logic they use
to manage fan speed. To set this function, perform the following operations:
(1) Press the “FUNCTION” button until one of the “QUIET” function icons is displayed ( ); this function directly sets fan
speed to minimum, thereby ensuring the least noise possible; or “AUTO QUIET“ ( ); this function manages fan speed in
relation to the difference between indoor temperature and the operating setting, in accordance with the following Cooling
conditions:
• If the indoor air Temperature is higher than the setting temperature + 2°C, MEDIUM speed will be set;
• If the indoor air Temperature is lower or equal to the setting temperature + 2°C, MINIMUM speed will be set;
Or Heating conditions:
• If the indoor air Temperature is lower than the setting temperature -2°C, MEDIUM speed will be set;
• If the indoor air Temperature is higher than the setting temperature -2°C, MINIMUM speed will be set;
at this stage, the selected icon will begin to flash, indicating that the chosen low noise function mode selected is active;
(2) press buttons ( ) or ( ) respectively to switch from “QUIET” to “AUTO QUIET” function;
(3) press the “ENTER/CANCEL” button again to activate the selected function;
(1) (2)
(3)
WARNING: to disacvate this funcon,
press the “FUNCTION” buon unl the
funcon to be cancelled is selected and then
press the “ENTER/CANCEL“ buon