Olimpia splendid Maestro Pro 01925 User manual

SERVICE MANUAL ENG
INVERTER 12 HP
Model# 01925

2
INDEX
1 SAFETY WARNING 4
2 UNIT DESCRIPTION 5
2.1
Structure ............................... 5
2.2 Technical characteristics................... 6
2.3 Size of Maestro Pro 12 HP ................. 7
2.4 Control panel . . . . . . . . . . . . . . . . . .. . 8
2.4.1
Operating conditions
.............. 8
2.4.2
Special features
................. 8
2.5
Remote control............................ 9
2.5.1
Keys
...........................9
2.5.2 Display .........................9
2.5.3 SILENT mode . .. ...............10
2.5.4 ECO mode ................... 10
2.5.5 Energy BOOST / System ENABLE ..10
3 OPERATING LOGICS 12
3.1
Cooling ...................................... 12
3.2
Heating ................................. 12
3.3
Defrosting . . . . . . . . . . . . . . . . . . . 12
3.4
Dehumidifier ............................. 13
3.5 Fan only .... . . . . . . . . . . . . . . . . . . . 13
3.6 Automatic (select mode) ........................ 13
3.7
Thermo actuator. . . . . . . . . . . . . . . . . 14
3.8 Condensate drain pump . . . . . . . . . . . . 14
4 WIRING DIAGRAM 15
5 REFRIGERATION CIRCUIT 16
5.1 Cooling circuit with Reversing valve 16
5.2 Heating circuit with Reversing valve 1 6
6 INSTALLATION 17
6.1 Included Components. . . . . . . . . . . . . 17
6.2
Placement . . . . . . . . . . . . . . . . . . . 17
6.2.1
High Wall installation
............ 17
6.2.2
Low Wall installation
.........17
6.3
Mounting .............................. 18
6.3.1
Wall drilling
. . . . . . . . .............18
6.3.2
Condensate drain
. .... ..............18
6.3.3 Condensate connection to the unit
........................18
6.3.4
Air ducts
. ...... ...............19
6.3.5
outdoor grills .
..................19
6.3.6
Preparation of holes on the unit
. .....20
6.4 Dock units ............................ 20
6.5 Electrical connections.................... 21
6.6 Switching the unit on . . . . . . . . . . . . . . 21
7 ALARM DIAGNOSTICS 22
7.1 Display board alarms ...................22
7.1.1
External part alarms
.............22
7.1.2
Internal part alarms
.............. 22
7.2 LED alarm codes...................... 22
7.2.1
IPM board alarms
. ..............22
7.2.2 Compressor frequency Restrictions.....22
SYMBOLS USED IN THE MANUAL AND
THEIR MEANING
a
WARNING
To indicate actions that if not carried out correctly may result in
injuries of general origin, personal injury or death.
a
ATTENTION
To indicate actions that if not carried out correctly can cause
accidents of general origin or can generate malfunctions.
NOTICE
To indicate important information and particularly delicate
operations.
RANGE
PRODUCT FAMILY Model #
Maestro Pro Inverter 12 HP 01925
DATA PLATE
here is a date plate that shows the information of the unit.
Open the left mask (1) to access the data plate.
Mod. Namexx Type HIIxxxxx
Prod. No. 123456789/xx
115V - 60Hz xxxxW
Ser. No. 123456789
10A
IPX4
Made in Italy
1

3
MAESTRO PRO INVERTER
7.3 IPM board alarms ...................... 23
7.3.1 ERROR 1 - Failure of the outdoor air
temperature sensor . . . . . . . .
.......23
7.3.2 ERROR 2 - outdoor coil
temperature sensor failure
.........23
7.3.3 ERROR 3 - Compressor discharge
temperature sensor failure .........24
7.3.4 ERROR 4 - Compressor current
protection ................... 24
7.3.5 ERROR 5 - No communication between
the IPM - IDU cards .............25
7.3.6 ERROR 6 - Power line
overcurrent ................... 25
7.3.7
ERROR 7 - No c ompressor
load
. . . . . . . . . . . . . . . . 25
7.3.8 ERROR 8 - DC over / under voltage. .. 26
7.3.9 ERROR 9 - Current anomaly . . . ....26
7.3.10 ERROR 10 - outdoor coil
temperature too high (HTE)
.......27
7.3.11 ERROR 11 - DC over / under voltage . 2 8
7.3.12 ERROR 12 - EEPROM error ... . ..28
7.3.13 ERROR 13 - Compressor discharge
temperature too high . . . . . . . . . 28
...........29
7.3.14 ERROR 14 - Room temperature
sensor failure . ....
7.3.15 ERROR 15- Indoor coil
t emperature sensor failure . . . . . ....29
7.3.16 ERROR 16 - coil Indoor
temperature too low
........... ....... ..29
7.3.17 ERROR 17 - Indoor coil
temperature too high (HTI
).... ...30
7.3.18 ERROR 19 - Indoor fan motor
failure
.. .....................30
7.3.19 ERROR 20 - High water level . . . . . 31
7.3.20 ERROR 21 - EPROM reading error 32
8 COMPONENTS 32
8.1 EXV- Electronic expansion valve............ 32
8.2 Reversing valve. . . ... . . . . . . . . . . . . 32
8.3 IPM card .............................. 33
8.4 PFC card .. ...........................33
8.5 MAIN card............................. 33
8.6 Display . . . . . . . . . . . . . . . . . .. .. . 34
8.7 Thermoactuator and plug . . . . . . . . . .. 34
8.8 outdoor air sensor . . . . . . . . . . . . . . . 34
8.9 Indoor air sensor . . . . . . . . . . . . . . . . 34
8.10 IDU sensor ............................ 34
8.11 ODU sensor ...........................35
8.12 Float Switch . . .........................35
8.13 Pan Heater kit . . . . . . . . . . . . . . . . . 35
8.14 Pump .-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.15 Compressor ........................... 36
8.16 Indoor fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.17 outdoor fan. . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.18 Indoor Coil.............. . . . . . . . . . . . . . . 37
8.19 Outdoor Coil . . . . . . . . . . . . . . . 37
8.20 Fl a p p e r M o to r . . . . . . . . . . . . . . 37
8.21 Condensate Slinger . . . . . . . . . . .. . 37
9 REMOVING COMPONENTS 38
9.1 Filter removal .......................... 39
9.2 Body removal . . . . .......................39
9.3 Front cover removal..................... 40
9.4 Backrest removal ....................... 41
9.5 outdoor fan removal. . . . . . . .. . . . . . . 42
9.6 Internal Fan Removal........ 42
9.7 IDU electronic front cover removal .. ........ 42
9.8 Inverter display board removal ............. 43
9.9 MAIN board box removal.................. 43
9.10 MAIN card removal ...................... 43
9.11 ODU electronic cover removal ............. 43
9.12 Removal of the ODU electronic unit. . . . . . . 44
9.13 PFC card removal.. . .................. 44
9.14 IPM card removal ....................... 44
9.15 Removal of pump unit - sensors - floats.. . . ..... 45
9.16 Cable cover removal ..... .. ............. 45
9.17 Removing the thermo-actuator and Plug.. . . . 46
9.18 Pump removal .......................... 46
9.19 Removing the condensate distributor unit . ... 46
9.20 Charging/discharging the coolant . . . . . . . 48
48
48
9.20.1 Device with front loading ..........
9.20.2 Device with rear loading ............
9.20.3 General procedure
..............48
9.21 Removing the outdoor coil . . . . . . . . . . 49
9.22 Removing the indoor coil............. . . . . . . . . . . 50
9.23 Removing the compressor . . . . . . . . . . . . . . 51
9.24 Removing floats. . . . . . . . . . . . . . . . . . . . 52
10 outdoor CONNECTIONS 52
10.1 WiFi Kit
B1018 . . . . . . . . . . . . . . . . . . . . . . . . . . 52
.....................52
............52
.....................52
10.1.1 General .
10.1.2 WiFi card structure . . .
10.1.3 Technical data
10.1.4 WiFi card installation . . . . . .
.........53
10.2 OLIMPIA SPLENDID application ........... 53
10.2.1 App download and installation . . . 53
10.2.2 App configuration on smartphone . . . 54
..............54 10.2.3 Controls screen . . .
10.2.4 Air conditioning setting . . . .
........54
10.3 Anomalies diagnostics ................... 56
11 MAINTENANCE 57
11.1 Filter replacement . . . . . . . . . . . . . .. 57
11.2 Maintenance .......................... 57
11.3 Condensate water discharge ... .......... 57
11.4 outdoor cleaning .. . . . . . . . . . . . . . 57
11.5 Periodic maintenance table . . . . . . . . . . 57
12 THERMISTER VALUES TABLE 58
12.1 Sensor table............................ 58
12.2 Compressor senor table.......... ........ 58

4
a
WARNING
READ THE INSTRUCTIONS
Read this manual carefully before carrying out any
operation on the appliance.
Failure to follow these instructions can result in
property damage, personal injury or death.
a
WARNING
During maintenance of the appliance, make sure
that it is installed in a professional manner, in
accordance with current legislation. Failure to
do so can result in substantial damage to
property, severe personal injury or death.
–The owner and manager is responsible for the
operational safety and regulatory compliance of
the heating system.
–Improper installation, adjustment or
maintenance can cause damage to material
assets, personal injury or death.
a
WARNING
HIGH PRESSURE DANGER
The refrigeration circuit contains high pressure
coolant and oil.
Proper safety procedures must be followed and
appropriate protective equipment worn when
working with refrigerants.
Failure to follow these instructions can result in
serious injury or death.
NOTICE
FIRE DANGER
The use of a torch requires extreme caution. Follow all
recommended safety precautions and protect surrounding
areas with fireproof materials. Keep a fire extinguisher handy.
Failure to follow these instructions can cause moderate to
severe damage.
NOTICE
This appliance must be installed and connected to the
electrical network only by qualified personnel according to the
installation instructions and in compliance with local
regulations in force. The manufacturer assumes no
responsibility for the incorrect installation of the appliances.
a
WARNING
DANGER OF ELECTROCUTION
Check that the electrical outlet has the same
configuration as the plug of the appliance. If
different, consult a licensed electrician.
–Do not use plug adapters.
–Do not use an extension cable.
–Do not remove the earth ground.
Always connect to a grounded 3-pole socket.
Failure to follow these instructions can result in
death, fire, or electric shock.
NOTICE
The appliance must be subjected to maintenance
by qualified personnel at least once a year, in
accordance with current legislation.
NOTICE
Incorrect maintenance or adjustment can damage
the appliance and cause harm to people or create
a potential danger.
a
WARNING
Do not remove, disable or bypass the safety
devices of this unit. This could cause fire, injury or
death.
a
WARNING
RISK OF ELECTROCUTION
Before carrying out any maintenance or cleaning,
disconnect the appliance from the power supply.
Failure to follow these instructions can result in
electric shock, serious injury or death.
a
WARNING
DANGERS FROM MOVING PARTS
–It is forbidden to operate the unit if it is out of
order or with the front grille removed.
–It is forbidden to put your hands within the
radius of action of the fan.
Failure to follow these instructions can result in
serious injury.
1 WARNINGS AND SAFETY RULES

5
MAESTRO PRO INVERTER
2 DESCRIPTION OF THE UNIT
2.1 Structure
4
3
2
7
5
1
6
9
15
12
13
10
14
8
17
11
16
18
Ref. Description
1Upper grill
2Body
3Flap
4Right Mask
5Left Mask
6Display
7Remote control
8ON/OFF key
9Indoor Coil
Ref. Description
10 Outdoor Coil
11 Pump unit
12 IPM card
13 Power board (POWER)
14 Control board
15 Outdoor fan
16 Base
17 Compressor
18 Indoor fan

6
2.2 Technical features
Description
MAESTRO PRO 12 HP
Model 01925
Voltage (min. 109, max 127) AC Volts/Phase/Hertz 115-1-60
Nominal cooling / heating capacity(1) BTU/H 8150
Maximum cooling / heating capacity (2) BTU/H 11,600/10,600
Nominal energy consumption - Cooling Watts 830
Nominal energy consumption - heating Watts 850
Combined energy efficiency ratio - cooling (3) CEER 9.74
Combined energy efficiency ratio - heating (3) CEER 9.74
Estimated coefficient of performance COP 3.8
Compressor Type Rotary Inverter
Nominal load current of the compressor R.L.A. 4.9
Dehumidification capacity Pints/hr 3.0
Indoor fan Type ECM
Indoor fan speed # of revolutions Variable
Ampere at full load of the indoor fan F.L.A. .33
Intdoor air volume (cooling mode) CFM Up to 290
Indoor air volume (heating mode) CFM Up to 290
Outdoor fan speed # of revolutions Variable
Intake / Exhaust Hole Diameter (2)Inches 8” each
Maximum range of the remote control Feet 26’
Noise level(4) dBA min-max 32-43
Indoor / outdoor - transmission class (5) OITC 25
Sound Transmission Class (5) STC 36
Refrigerant ASHRAE # R-410A
Refrigerant Factory Charge lbs - oz 1 – 5
(1) Test Condition: Data refers to conditions and parameters as required by the DOE requirements governing this type of product.
HEATING MODE: outdoor ambient temperature DB 47°F/8.3°C WB 43°F/6°C; Indoor environment DB 70°F/21°C - WB 60°F/15.6°C COOLING
MODE: outdoor ambient temperature DB 95°F/35° C BU 75°F/24°C; Indoor ambient temperature DB 80°F /26.7°C - WB 67°F / 19.4°C
(2) Maximum capacity achieved with Power Pro Boost inverter technology. Openings of 8 inches in diameter are recommended for full capacity and
efficiency. Alternatively, it is possible to use openings with a diameter of 6.4 inches, however there is a corresponding loss of capacity and efficiency
that can vary according to the specific application.
(3) The CEER is calculated according to the ANSI RAC-1 2015 standard. The Combined Energy Efficiency Ratio (CEER) is a standard that measures
efficiency of the unit when it is in standby and when it is cooling a space.
(4) The test conditions for the acoustic assessments are conducted according to the DOA classification, carried out in the acoustic chamber at a distance
of 6.5 feet (2 meters). The minimum noise values are detected only in fan only mode.
(5) STC and OITC are calculated by an independent third party in accordance with ASHRAE standards .
DESCRIPTION
MAESTRO PRO 12 HP
Indoor temperature
Maximum operating temperature in cooling mode °F/°C DB 95°F/35°C - WB 75°F/24°C
Minimum operating temperature in cooling mode °F/°C DB 64°F/18°C
Maximum operating temperature in heating mode °F/°C DB 81°F/27°C
Minimum operating temperature in heating mode °F/°C -
outdoor temperature
Maximum operating temperature in cooling mode °F/°C DB 109°F/43°C - WB 90°F/32°C
Minimum operating temperature in cooling mode °F/°C DB 14°F/-10°C
Maximum operating temperature in heating mode °F/°C DB 75°F/24°C - WB 64°F/18°C
Minimum operating temperature in heating mode °F/°C DB 5°F/-15°C
(*) Since the company is constantly engaged in the continuous improvement of all its production, the aesthetic and dimensional characteristics, technical
data, equipment and accessories may be subject to change. Please refer to the latest publication
.

7
MAESTRO PRO INVERTER
2.3 Dimensions of Maestro Pro 12 HP
904 (35.6”) 216 (8.5”)
520 (20.5”)
162 (6.4”)
132 (5.2”)
152 (6”)
188 (7.4”)
140 (5.5”)
261 (10.3”)472 (18.6”)
442 (17.4”)
8”
8”
805 (31.7”)48 (1.9”)
mm (Inch)
1 = 1mm
6.4”
DESCRIPTION
MAESTRO PRO 12 HP
Dimensions (without packaging) mm
(inches)900 x 518 x 215 (35.5” x 20.4” x 8.5”)
Dimensions (with packaging)mm
(inches)980 x 609 x 330 (38.6” x 24” x 13”)
Weight (without packaging kg (lbs) 39 (86)
Weight (with packaging)kg (lbs) 42 (93)

8
2.4 Control panel
1
4 5 6 7 8
2
39
KEY DESCRIPTION
1zON/OFF
-Short touch for speed selection
-Long touch for activation / deactivation
2-Setpoint decrease - min 16°C (61ºF) heating
18°C (64ºF) cooling
3+Setpoint increase - max 30°C (86ºF)
4LED1 Timer signal, YELLOW color if active
5DISPLAY Information display
6LED5
STATUS reporting:
-RED: heating
-LIGHT BLUE: cooling / dehumidification
-WHITE: Ventilation only / Stand-By
7MODE
Operation mode selection and setting
parameters
-Short touch for operating mode selection
-Long touch to enable parameter setting if in stand-
by
8(BEEP) Acoustic signal
9(IR) Infrared receiver
2.4.1 Operating conditions
FUNCTION DISPLAY LED5 LED1
Stand-by OFF OFF OFF
Cooling down 18-30°C ON BLUE -
64-86°F
Warm up 18-30°C ON RED -
61-86°F
Dehumidification
--
ON BLUE -
Fan
--
OFF -
Automatic
AA
- -
Maximum fan speed
HI
- -
Medium fan speed
Me
- -
Minimum fan speed
Lo
- -
Automatic fan speed
Au
- -
Timer enabled - - ON
fDirty filter warning
FI
- -
Energy Boost - opening
contact (par. Pl>0)
E
- -
System enabled - contact
opening (par. Pl=0)
P
OFF OFF
Keyboard locked
bL
- -
Configuration parameter
on the upper wall/ lower
PO
OFF OFF
Ceiling installation
uP
OFF OFF
Floor installation
dO
OFF OFF
2.4.2 Main Function
FUNCTION KEYS OPERATION
FI
Filter alarm
reset
zand MODE
Simultaneously press the keys
indicated for at least 5 seconds.
Lock / Unlock +and -Simultaneously press the keys
indicated for at least 5 seconds.

9
MAESTRO PRO INVERTER
2.5 Remote control
The remote control is the interface between the unit and the end
user, it is very important to learn all the functions, the use of the
various commands and the meaning of the symbols shown on it.
2.5.1 Keys
13
5
6
7
8
10
12
9
11
4
3
2
1
KEY DESCRIPTION
1ON/OFF unit
2Fan speed setting
3Silent mode on/off
4Flap oscillation on/off
5Selection of the operating mode
6Increase the set values of: temperature/clock /
programming. Press together with the button - to
change the °F/°C temperature unit.
7Decrease the set values of: temperature/clock /
programming. Press together with the + button to
change the °F/°C temperature unit.
8ECO mode activation / deactivation.
Reduces power consumption by 50%
9Clock setting / programming
10 °C/°F Temperature unit setting °C/°F (if present)
11 Activation / deactivation of program 1 / program 2
functions
12 Activation / deactivation of the unit display
13 Display Activation / deactivation of the display of the report
unit
2.5.2 Display
20
19
18 17 16 15 14
13
12
11
10
9
87654321
SIMBOLO DESCRIZIONE
1Heating
2Cooling
3Dehumidification
4Command transmission in progress
5Automatic mode
6Program 1
7Setting the program shutdown time
8Clock / Program setting
9Program 2
10 Setting the program start time
11 Temperature / time unit of measurement
12 Low battery warning
13 Minute timer
14 ECO function enabled
15 Automatic fan speed
16 Maximum fan speed
17 Medium fan speed
18 Minimum fan speed
19 QUIET MODE function activated
20 Desired temperature / clock / schedule

10
2.5.3 SILENT (quiet) mode
This mode can be selected from the infrared receiver (button B3)
or from the serial port and can only be used in combination with
the cooling or heating modes. When the quite cooling mode is
activated, the outdoor fan and the Indoor fan are forced to run at
low speed. The compressor is forced to operate at a fixed
frequency set (default 40Hz) and Tset is automatically increased
by 1° C after 1 hour and by a another degree after 2 hours
(starting from the activation of any function or subsequent
modification of the Tset).
All the cooling subprograms are still enabled, in this way the
outdoor fan can be switched to higher speeds if required by the
usual algorithm.
When the quiet heating mode is activated, the outdoor fan and the
Indoor fan a to run at low speed. The compressor is forced to
operate at a fixed frequency set via IPM EEPROM ADDR1F6
(default 40Hz) and Tset is automatically reduced by 1°C after 1
hour and by a further degree after 2 hours (starting from the
activation of a function or subsequent modification of the Tset).
All heating subroutines are still enabled.
In cases where the low noise mode is deactivated, Tset is
changed from the remote control, the unit is placed in standby
mode or the power is cut off, the operation timer is reset and Tset
is reset to the last received value from the remote control.
In this condition all the foreseen malfunction warnings are
enabled.
2.5.4 ECO Mode
This mode can be selected from the infrared receiver (button B8)
or from the serial port; no message appears on the display. The
IPM board already includes HIGH VOLTAGE limits, which refers
to the total voltage absorbed by the power and IPM boards and
their accessories: maximum voltage limit in cooling mode (e.g. 7
Ampere)
maximum voltage limit in heating mode (e.g. 7 Ampere)
If Economy mode is activated, a lower voltage limit is introduced:
The percentage (%) of the voltage limit is set to 50%.
Example:
5 Ampere x 50% = 2.5Ampere
In order not to exceed 2.5 Amps, the compressor frequency is
limited.
2.5.5 Energy BOOST / System ENABLE
Y2
a
WARNING
DANGER OF ELECTROCUTION
Before carrying out any maintenance or cleaning,
disconnect the appliance from the power supply.
ALL electrical connections and wiring MUST be
done by a qualified electrician and in compliance
with local regulations.
Failure to follow these instructions can cause
damage to property, personal injury
It can be used both as a window contact (on off of the appliance
based on the opening / closing of the contact) or as an ENERGY
BOOST function.
Based on the setting of the PI parameter, it is possible to select
whether and which of the functions are to be activated.
The input located on the terminal (Y2) of the main board can be
used to activate the ENERGY BOOST or SY-STEM ENABLE
functions of the air conditioner.
Configuration and use of the ENERGY BOOST or SYSTEM
ENABLE input:
–Insert the plug into the socket to power the air conditioner then
make sure it is in stand-by mode.
–On the control panel, press the MODE button for more than 10
seconds, until an acoustic signal is emitted.
–The display shows parameter P0.

11
MAESTRO PRO INVERTER
–Release the MODE key and press it again until parameter Pl is
selected.
–Release the MODE key and press it again for 2 seconds.
–Press the + or - keys to select the desired configuration.
–With PI value = 0, the input works as a SYSTEM ENABLE.
When the contact opens, the air conditioner is forced into
stand-by mode. When the contact closes, the air conditioner
restores the previous operating state.
–With PI value ≠ 0, the input works as ENERGY BOOST. When
the contact opens, the display shows code E, the desired
temperature is reduced by PI °C if the air conditioner is in
cooling mode, or increased by PI °C if the air conditioner is in
heating mode. When the contact closes, the air conditioner
restores the previous operating state. The ENERGY BOOST
input has no effect when the unit is in fan only, dehumidifier or
automatic mode.
2.5.5.1 System ENABLE
Contact WINDOW
Contact open: unit in stand-by, cannot be activated by remote
control or by touch keyboard.
Contact closed: the unit is ready and can be activated.
Contact closed: when the contact closes, the unit restores the
previous operating condition.
2.5.5.2 Energy BOOST
Remote setpoint increase / decrease
Contact open: regular set point set by remote control or
keyboard.
Contact closed: the set point is increased in heating and reduced
in cooling by a certain offset that can be set by parameter.

12
3 OPERATING LOGIC
3.1 Cooling
Compressor : modulation and shutdown in relation to setpoint and
room temperature.
Tset -1°C Tset +1°C
COMPRESSOR
ON
COMPRESSOR
OFF
Indoor fan: in automatic mode.
- MINIMUM SPEED
Ambient temperature <T. Setpoint + 1°C
- AVERAGE SPEED
T. Setpoint + 1°C <Ambient temperature <T. Setpoint + 3°C
- FULL SPEED
Ambient temperature> T. Setpoint + 3°C
outdoor fan: the speed of the outdoor fan is calculated by the
IPM board in relation to the outdoor air and outdoor coil
temperature.
Reversing valve: NOT POWERED
3.3 Defrost
Defrost End of defrostDefrost start
205
Defrost frequency
runrun
Min. Fre.
Speed remote control
OFF
OFF
ON
OFF
ON
ON
ON
Heating opening
Defrost opening
WEATHER
EXV
Indoor
FAN
outdoor
FAN
COMPRESSOR
4 VALVES
Heating opening
Speed remote control
Stop hot air in heating mode
ON
ON
ON
ON
OFF
OFF
Min. Fre.
4-valves
ignition delay time
Activation conditions :
–outdoor T. > 5°C (41ºF) and T.coil < -3°C(27ºF)
–5°C > outdoor T. > -1 °C (30ºF) and T.coil < - 10°C (14ºF)
–- 1°C > outdoor T. > - 8°C (18ºF) and T.coil < - 13°C (9ºF)
–outdoor T. < - 8°C (18ºF) and T.coil < - 15°C (5ºD)
–outdoor T. < - 8°C (8ºF)and the appliance has been running for 120 min.
Stop conditions :
–If after 1 minute the coil temperature is higher than 12°C (54ºF),
the function ends immediately.
–After 10 minutes in any condition.
3.2 Heating
Compressor : modulation and shutdown in relation to setpoint and
room temperature.
Tset -1°C Tset +1°C
COMPRESSOR
ON
COMPRESSOR
OFF
Indoor fan: minimum Indoor coil temperature control.
36°C 38°C
OFF minimum speed
fan speed set
by remote control
outdoor fan: the speed of the outdoor fan is calculated by the
IPM board in relation to the outdoor air temperature.
Reversing valve: POWERED

13
MAESTRO PRO INVERTER
3.4 Dehumidification
It is possible to select the dehumidification mode only from the
infrared receiver (button B5) or from the serial port (not from the
display); the user interface displays the messages LED6 = '-' and
LED5 = 'ON Blue'.
Dehumidification basically consists of a cooling mode in which
Tset is changed periodically:
–Starting the dehumidification mode (from standby, heating,
cooling or any other condition);
–- The IDU FAN starts to work at low speed;
–- The COMPRESSOR is forced off;
–- After 3 minutes the room temperature is reached, stored as
Troom (0) and used for the following calculation:
Tset1 = Troom(0) -3°C
Tset2 = Troom(0) +1°C
The unit starts operating in cooling mode.
–Tset1 for IPM EEPROM ADDR101 (default 6 minutes);
–Tset2 for IPM EEPROM ADDR102 (default value 10 minutes);
–Tset1 for IPM EEPROM ADDR101 (default value 6 minutes);
–Tset2 for IPM EEPROM ADDR102 (default value 10 minutes);
When the dehumidification mode is activated, the first 6 minutes
after the 3 minutes of operation of the indoor unit fan may vary
depending on the timer programming. Operation in
dehumidification mode is the same as in cooling mode:
–The compressor can be activated / deactivated according to the
difference between Tset1 / Tset2 and Troom (ambient
temperature);
–The high frequency of the compressor is defaulted to 55 Hz),
the low frequency is defaulted to 35 Hz);
–After switching off the compressor and before subsequent use,
you must wait for at least 180 seconds.
–The compressor is always started simultaneously with the fan of
the outdoor unit (without delayed starts).
In dehumidification mode, the indoor unit fan continues to run at
low speed. The time count in 6 and 10 minute intervals
continues to run even if the compressor stops.
3.5 Fan Only
This mode can only be selected from the infrared receiver (B5
key), from the display (K4 key) or from the serial port; the display
shows the messages LED6 = '-' and LED5 = OFF.
In this mode the only Indoor fan is always powered and you can
select the desired speed at any time by pressing the relevant
button on the remote control or on the display.
All other outputs are disabled except the reversing valve
for 2 minutes, if the heating mode was previously selected
except the water valve if 3 minutes have not yet elapsed since
the previous continuous operation of the pump.
If only the DIRTY FILTER warning is enabled (LED6 = 'FI') it's
possible to select the air cleaning mode at any time (oscillation or
fixed position mode). The fan operation mode is not affected by
the temperature sensor readings.
3.6 Automatic mode
It is possible to select the heating mode from the infrared
receiver (button B5) or from the serial port; the display shows the
message LED6 = 'A' (in this case, LED5 = 'ON Red' if the unit is
in self-heating mode, LED5 = 'ON Blue' in self-cooling mode, or
LED5 = OFF in self-ventilation, as indicated below).
In "Automatic", the operating mode of the appliance is
automatically selected based on the ambient temperature, which
is monitored continuously:
–Heating, compressor operation referred to a temperature (T)
set at 21°C (70ºF)
–If Troom <17°C (63ºF), the appliance works in heating mode
and the maximum speed of the indoor unit is enabled;
–If 17°C (63ºF) <Troom <19°C (66ºF), the appliance works in
heating mode and medium speed is enabled;
–
–
If 19°C (66ºF) <Troom <21°C (70ºF), the appliance works in
heating mode and the minimum speed is enabled;
If 21°C (70ºF) <Troom ≤ 24°C(75ºF), the appliance operates
in ventilation mode and the minimum speed is enabled;
Cooling, compressor operation referred to a temperature (Tset)
fixed at 24°C (75ºF):
- If 24°C (75ºF) <Troom ≤ 25°C (77ºF), the appliance operates in
cooling mode and the minimum speed is enabled;
- If 25°C (75ºF) <Troom ≤ 27°C (81ºF), the appliance works in
cooling mode and medium speed is enabled;
- If Troom> 27°C (81ºF), the appliance works in cooling mode
and the maximum speed is enabled.
After each change, the operating mode remains unchanged for
at least 3 minutes to avoid sudden changes.
In this mode, the room temperature correction is always disabled.

14
3.7 Thermoactuator
The cooling/dehumidification thermo-actuator logic is shown in
the table.
ACTION MANAGED BY BOARD ON ACTUAOR
AND OUTDOOR FAN IN COOLING AND
DEHUMIDIFICATION MODE
MAESTRO
PRO
Micro pump closed> 1 minute
Actuator 115V AC
Open (3 minites)
outdoor
fan --
Text <15°C (59ºF) (until it goes
back > 17°C(63ºF) Actuator 115V AC
MODE MAESTRO PRO
Stand By
COOLING
HEATING
115V AC
3.8 Condensate disposal pump
Pump activation conditions in cooling and dehumidification.
Only with active compressor
If the run contact remains closed for less than 0.5 seconds, the
pump will not start.
If the start contact remains closed for at least 0.5 seconds, the
pump activates and stays on until the contact opens.
If the pump remains active continuously for more than 1 minute,
the thermoactuator is activated until the pump is switched off
(opening of the start contact) and for a minimum of 3 minutes. If
at the end of the 3 minutes the pump is off, the thermoactuator is
also deactivated, otherwise it remains active until the pump
stops.
ALWAYS OFF IN HEATING AND FAN ONLY MODES.

15
MAESTRO PRO INVERTER
4 ELECTRICAL DIAGRAM
DESCRIPTION MAESTRO PRO 12 HP 1
Supply voltage (min.109 - max 127)
115 AC Volt
1Phase
60 Hertz

16
5 REFRIGERANT CIRCUIT
5.1 Cooling refrigerant circuit with Reversing valve
OUTDOOR COIL INDOOR COIL
EXPANSION
VALVE
COOLING
5.2 Heating cooling circuit with reversing valve
OUTDOOR COIL INDOOR COIL
EXPANSION
VALVE
E C
HEATING MODE
DESCRIPTION TYPE AMOUNT
Refrigerant charge by factory R-410 A 500 - (1.1) gr (lbs)
NOTE: The refrigeration circuit is hermetically sealed.
E
C

17
MAESTRO PRO INVERTER
6 INSTALLATION
6.1 Items supplied
2
3
8
7
4
6
1312
1
10
11
5
9
RIF. DESCRIZIONE PEZZI
1MAESTRO PRO 1
2Remote control including batteries 1
3Use and maintenance manuals + warranty 1
4Adhesive insulation strip 2
5outdoor grids for air inlet and outlet including chains
and kit for installing grids 2
6Indoor flange 2
7Condensate drain pipe 1
8Mounting hardware 1
9Wall mounting bracket 2
10 Sheets used for wall ducts 2
11 Paper template for drilling holes 1
12 Air purification filter (green color)1
13 Activated carbon filter (black color)1
6.2 Position
6.2.1 LOW WALL installation
min
102mm
4”
min 60
mm
2.4”
NOTICE
Check that in this type of installation the parameter "P0" is set
on "uP”.
6.2.2 LOW WALL installation
min 153mm
6”
min
102mm
4”
NOTICE
Check that in this type of installation the parameter "P0" is set
on "d0”.

18
6.3 Assembly
6.3.1 Wall drilling
6.3.2 Condensate drain
3°
min
300mm
12”
In wall drain requires trap TANK
6.3.3 Condensate drain connection to the unit
1
2
3

19
MAESTRO PRO INVERTER
6.3.4 Air ducts
ø202 mm
ø162 mm
130 mm
8”
6.5”
5.1”
6.3.5 Outdoor grid

20
6.3.6 Preparation of holes on the unit
a
ATTENTION
DANGER OF CUTS
Although great care has been taken to minimize
sharp edges, use gloves or other hand protection
when handling the appliance.
Failure to follow these instructions can result in
minor to moderate personal injury.
ø162 mm
6.5”
ø202 mm
8”
ø162 mm
6.5”
ø202 mm
8”
6.4 Hook the unit
a
ATTENTION
EXCESSIVE WEIGHT HAZARD
Use two or more people when installing the air
conditioner. Observe the maximum weight that
can be lifted per person.
Failure to observe this precaution could result in
back injury or other injuries.
a
WARNING
DANGER OF FALLING OBJECTS
Failure to comply with the installation instructions
for assembling the appliance can cause damage
to property, personal injury or death.
NOTICE
Copper refrigerant pipes are NOT handles.
DO NOT use pipes to lift or move the appliance.