Technibel CWX3B5XAB, CWX5B5XAB, CWX6B5XAB, CWX8B5XAB, CWX10B5XAB Technical Data & Service Manual
TECHNICAL DATA
& SERVICE MANUAL
INDOOR UNIT:
CWX3B5XAB
CWX5B5XAB
CWX6B5XAB
CWX8B5XAB
CWX10B5XAB
SPLIT SYSTEM AIR CONDITIONER
Model No. Product Code No.
CWX3B5XAB 38.7106.000
0.8180.572.1 April 2011
CWX5B5XAB 38.7106.001
CWX6B5XAB 38.7106.002
CWX8B5XAB 38.7106.003
CWX10B5XAB 38.7106.004
Page
1. SPECIFICATIONS 3
1-1 Unit specifications 3
1-2 Major Component specifications 8
1-3 Other Component specifications 13
2. DIMENSIONAL DATA 14
3. ELECTRICAL DATA 17
3-1 Electric Wiring Diagrams 17
3-2 Jumpers Configuration 19
3-3 Contacts for Building Automation 21
3-4 Maintenance 22
4. FUNCTION 23
4-1 Cool Mode Operation 23
4-2 Heat Mode Operation 24
4-3 Auto (cool/heat) Mode Operation 25
4-4 Dry Mode Operation 26
4-5 Fan Mode Operation 26
4-6 Auto Fan Speed 26
4-7 Forced Mode 27
4-8 Protection Operation in Heat Mode 27
4-9 I Feel Function 29
4-10 Night Function 29
4-11 Drain Pump Mode 29
4-12 Diagnostic 30
5. CHECKING ELETRICAL COMPONENTS 31
5-1 Measurement of Insulation Resistance 31
5-2 Checking Continuity of Fuse on PCB Ass'y 32
Table of Contents
2
1. SPECIFICATIONS
1-1 Unit Specifications
CWX3B5XAB
Power source
Performance
Input kW
Running Amps A
Total cooling capacity (1) High/Med./Low
kW
Sensible cooling capacity (1) High/Med./Low
kW
Heating capacity (2) High/Med./Low
kW
Air circulation High/Med./Low m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction
Water FLOW in cooling
High/Med./Low
l/h
Pressure drop on water in cooling (1)
High/Med./Low
kPa
Pressure drop on water in heating (2) High kPa
Air Filter
Power noise level High/Med./Low dB-A
Water tubing connections
Air clean filter
3-Way valve + By-pass (1/2 gas male, KVS 1,6, 230 NC)
Dimensions & Wei
g
ht
Dimensions Unit Height mm
Width mm
Depth mm
Ceiling panel Height mm
Width mm
Depth mm
Package dimensions Unit Height mm
Width mm
Depth mm
Volume
m
3
Ceiling panel Height mm
Width mm
Depth mm
Volume
m
3
Weight Unit Net kg
Shipping kg
Ceiling panel Net kg
Shipping kg
DATA SUBJECT TO CHANGE WITHOUT NOTICE
(1)
Air inlet 27°C (D.B.) / 19°C (W.B.); Water inlet 7°C; Water outlet 12°C
(2)
Air inlet 20°C; Water inlet 50°C (same water capacity as in conditions (1))
OPERATION LIMITS
Min. water inlet temperature 4°C Min. air recirculation temperature 5°C
Max. water inlet temperature 60°C Max. air recirculation temperature 32°C
Max. operating pressure of hydraulic circuit 16 bar
22,7
2,50
4,70
273
575
575
64
730
730
380
744
650
Washable, polypropylene, class HB (UL94)
0,18
Optional
46/43/40
Optional
1/2" gas female
110
800
800
0,07
18,2
0,052
0,24
Auto (Remote control)
Microprocessor/ I.C. thermostat
ON/OFF 24 hours
Wireless remote control unit
447/395/360
22,0/18,0/15,0
18
230 V - 50 Hz
2,31/2,09/1,91
3 and Auto
2,6/2,35/2,15
520/460/400
3,49/3,11/2,83
3
CWX5B5XAB
Power source
Performance
Input kW
Running Amps A
Total cooling capacity (1) High/Med./Low
kW
Sensible cooling capacity (1) High/Med./Low
kW
Heating capacity (2) High/Med./Low
kW
Air circulation High/Med./Low m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction
Water capacity in cooling
High/Med./Low
l/h
Pressure drop on water in cooling (1)
High/Med./Low
kPa
Pressure drop on water in heating (2) High kPa
Air Filter
Power noise level High/Med./Low dB-A
Water tubing connections
Air clean filter
3-Way valve + By-pass (1/2 gas male, KVS 1,6, 230 NC)
Dimensions & Wei
g
ht
Dimensions Unit Height mm
Width mm
Depth mm
Ceiling panel Height mm
Width mm
Depth mm
Package dimensions Unit Height mm
Width mm
Depth mm
Volume
m
3
Ceiling panel Height mm
Width mm
Depth mm
Volume
m
3
Weight Unit Net kg
Shipping kg
Ceiling panel Net kg
Shipping kg
DATA SUBJECT TO CHANGE WITHOUT NOTICE
(1)
Air inlet 27°C (D.B.) / 19°C (W.B.); Water inlet 7°C; Water outlet 12°C
(2)
Air inlet 20°C; Water inlet 50°C (same water capacity as in conditions (1))
OPERATION LIMITS
Min. water inlet temperature 4°C Min. air recirculation temperature 5°C
Max. water inlet temperature 60°C Max. air recirculation temperature 32°C
Max. operating pressure of hydraulic circuit 16 bar
4,70
273
575
575
64
730
730
380
744
650
0,07
18,2
22,7
2,50
0,18
110
800
800
230 V - 50 Hz
Wireless remote control unit
Microprocessor/ I.C. thermostat
4,70/4,10/3,60
3,72/3,21/2,80
5,70/4,85/4,35
750/630/530
0,087
ON/OFF 24 hours
0,41
3 and Auto
Washable, polypropylene, class HB (UL94)
Optional
Optional
Auto (Remote control)
790/690/600
55/51/48
1/2" gas female
42/32/25
33
4
CWX6B5XAB
Power source
Performance
Input kW
Running Amps A
Total cooling capacity (1) High/Med./Low
kW
Sensible cooling capacity (1) High/Med./Low
kW
Heating capacity (2) High/Med./Low
kW
Air circulation High/Med./Low m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction
Water capacity in cooling
High/Med./Low
l/h
Pressure drop on water in cooling (1)
High/Med./Low
kPa
Pressure drop on water in heating (2) High kPa
Air Filter
Power noise level High/Med./Low dB-A
Water tubing connections
Air clean filter
3-Way valve + By-pass (1/2 gas male, KVS 1,6, 230 NC)
Dimensions & Wei
g
ht
Dimensions (include panel) Height mm
Width mm
Depth mm
Package dimensions Unit Height mm
Width mm
Depth mm
Volume m3
Ceiling panel Height mm
Width mm
Depth mm
Volume m3
Weight (include panel) Net kg
Shipping kg
Ceiling panel Net kg
Shipping kg
DATA SUBJECT TO CHANGE WITHOUT NOTICE
(1)
Air inlet 27°C (D.B.) / 19°C (W.B.); Water inlet 7°C; Water outlet 12°C
(2)
Air inlet 20°C; Water inlet 50°C (same water capacity as in conditions (1))
OPERATION LIMITS
Min. water inlet temperature 4°C Min. air recirculation temperature 5°C
Max. water inlet temperature 60°C Max. air recirculation temperature 32°C
Max. operating pressure of hydraulic circuit 16 bar
8
0,1
22
26
6
110
965
965
Optional
338
0,238
840
860
860
320
880
30/19/14
30,0
51/44/40
1/2" gas female
Washable, polypropylene, class HB (UL94)
Optional
230 V - 50 Hz
6,0/5,0/4,20
4,70/3,80/3,20
7,70/6,40/5,40
1300/1060/850
0,115
0,5
Microprocessor/ I.C. thermostat
Wireless remote control unit
1030/860/720
ON/OFF 24 hours
3 and Auto
Auto (Remote control)
5
CWX8B5XAB
Power source
Performance
Input kW
Running Amps A
Total cooling capacity (1) High/Med./Low
kW
Sensible cooling capacity (1) High/Med./Low
kW
Heating capacity (2) High/Med./Low
kW
Air circulation High/Med./Low m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction
Water capacity in cooling
High/Med./Low
l/h
Pressure drop on water in cooling (1)
High/Med./Low
kPa
Pressure drop on water in heating (2) High kPa
Air Filter
Power noise level High/Med./Low dB-A
Water tubing connections
Air clean filter
3-Way valve + By-pass (1/2 gas male, KVS 1,6, 230 NC)
Dimensions & Wei
g
ht
Dimensions (include panel) Height mm
Width mm
Depth mm
Package dimensions Unit Height mm
Width mm
Depth mm
Volume m3
Ceiling panel Height mm
Width mm
Depth mm
Volume m3
Weight (include panel) Net kg
Shipping kg
Ceiling panel Net kg
Shipping kg
DATA SUBJECT TO CHANGE WITHOUT NOTICE
(1)
Air inlet 27°C (D.B.) / 19°C (W.B.); Water inlet 7°C; Water outlet 12°C
(2)
Air inlet 20°C; Water inlet 50°C (same water capacity as in conditions (1))
OPERATION LIMITS
Min. water inlet temperature 4°C Min. air recirculation temperature 5°C
Max. water inlet temperature 60°C Max. air recirculation temperature 32°C
Max. operating pressure of hydraulic circuit 16 bar
27
32
8
10
Microprocessor/ I.C. thermostat
Wireless remote control unit
1380/1120/950
ON/OFF 24 hours
3 and Auto
Auto (Remote control)
6,40/5,40/4,10
9,42/8,52/6,28
1270/1090/830
0,120
0,5
230 V - 50 Hz
8,0/6,50/5,50
41/31/23
39,0
50/46/37
1/2" gas female
1170
Optional
Washable, polypropylene, class HB (UL94)
Optional
368
1150
860
350
965
0,131
840
0,35
110
1250
6
CWX10B5XAB
Power source
Performance
Input kW
Running Amps A
Total cooling capacity (1) High/Med./Low
kW
Sensible cooling capacity (1) High/Med./Low
kW
Heating capacity (2) High/Med./Low
kW
Air circulation High/Med./Low m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction
Water capacity in cooling
High/Med./Low
l/h
Pressure drop on water in cooling (1)
High/Med./Low
kPa
Pressure drop on water in heating (2) High kPa
Air Filter
Power noise level High/Med./Low dB-A
Water tubing connections
Air clean filter
3-Way valve + By-pass (1/2 gas male, KVS 1,6, 230 NC)
Dimensions & Wei
g
ht
Dimensions (include panel) Height mm
Width mm
Depth mm
Package dimensions Unit Height mm
Width mm
Depth mm
Volume m3
Ceiling panel Height mm
Width mm
Depth mm
Volume m3
Weight (include panel) Net kg
Shipping kg
Ceiling panel Net kg
Shipping kg
DATA SUBJECT TO CHANGE WITHOUT NOTICE
(1)
Air inlet 27°C (D.B.) / 19°C (W.B.); Water inlet 7°C; Water outlet 12°C
(2)
Air inlet 20°C; Water inlet 50°C (same water capacity as in conditions (1))
OPERATION LIMITS
Min. water inlet temperature 4°C Min. air recirculation temperature 5°C
Max. water inlet temperature 60°C Max. air recirculation temperature 32°C
Max. operating pressure of hydraulic circuit 16 bar
965
0,131
840
0,35
110
1250
1170
Optional
Washable, polypropylene, class HB (UL94)
Optional
368
1150
860
350
63/42/26
60,0
57/49/43
1/2" gas female
230 V - 50 Hz
9,92/8,09/6,23
7,90/6,22/4,62
11,69/9,53/7,34
2300/1700/1200
0,180
0,8
Microprocessor/ I.C. thermostat
Wireless remote control unit
1700/1400/1070
ON/OFF 24 hours
3 and Auto
Auto (Remote control)
27
32
8
10
7
1-2 Major Component Specifications
CWX3B5XAB
Controller PCB
Part No.
Controls
Control circuit fuse
Jumper setting JP1..JP5
Remote Control Unit
Fan & Fan Motor
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. of poles…rpm (230 V, High / 2nd / 3rd / Low)
Running Amps A
Power input W
Coil resistance (Ambient temp. 20 °C )
Ω
Safety devices Type
Operating temp. Open °C
Close
Run capacitor µF
VAC
Flap Motor
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
m
2
Quantity of water l
DATA SUBJECT TO CHANGE WITHOUT NOTICE
2,54mm-5pcs
SAC ON-OFF IDU
SAC W-REM
0,43
4… 630 / 570 / 510 / 240
0,16
33
BLU-BRN: 57,5÷66,2
BLU-BLK: 795÷914
BLK-GRY: 70,1÷80,7
MP24Z2
Stepping motor
Microprocessor
250 V - 3,15 A
Centrifugal fan
K35406 M01971 …1
Automatic
1…. Ø 280 / L 175
1,5
400
GRY-RED: 70,1÷80,7
RED-WHT/YEL: 228÷262
Internal thermal protector
150 ± 10
400 ± 7%
DC 12 V
0,272
1,3
1
Aluminium plate fin / Copper tube
8
CWX5B5XAB
Controller PCB
Part No.
Controls
Control circuit fuse
Jumper setting JP1..JP5
Remote Control Unit
Fan & Fan Motor
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V, High/Med/Low/LowLow)
Running Amps A
Power input W
Coil resistance (Ambient temp. 20 °C )
Ω
BLU-BRN: 33,9 ÷ 39,1
BLU-BLK: 325 ÷ 374
BLK-GRY: 78,7 ÷ 90,5
GRY-RED: 49,7 ÷ 57,2
RED-WHT/YEL: 155 ÷ 178
Safety devices Type
Operating temp. Open °C
Close °C
Run capacitor µF
VAC
Flap Motor
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
m
2
Quantity of water l
DATA SUBJECT TO CHANGE WITHOUT NOTICE
0,86
0,272
Stepping motor
MP24Z2
DC 12 V
400 ± 7%
Aluminium plate fin / Copper tube
1
1,3
250 V - 3,15 A
SAC W-REM
1…. Ø 280 / L 175
Centrifugal fan
2,54mm-5pcs
K35407-MO1972 …1
4… 880/740/660/290
0,27
SAC ON-OFF IDU
Microprocessor
61
440
Internal thermal protector
150 ± 10
Automatic reclosing
2,0
9
CWX6B5XAB
Controller PCB
Part No.
Controls
Control circuit fuse
Jumper setting JP1..JP5
Remote Control Unit
Fan & Fan Motor
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V, High)
Running Amps A
Power input W
Coil resistance (Ambient temp. 20 °C )
Ω
BRN-WHT: 170,3
WHT-VLT: 18,1
VLT-ORG: 43,2
ORG-YEL: 43,2
WHT-PNK: 83,5
YEL-BLK: 60,2
Safety devices Type
Operating temp. Open °C
Close °C
Run capacitor µF
VAC
Flap Motor
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
m
2
Quantity of water l
DATA SUBJECT TO CHANGE WITHOUT NOTICE
31,4
450
Internal thermal protector
130 ± 8
79 ± 15
4,5
0,343
1,00
Stepping motor
MP24Z2
DC 12 V
400 ± 7%
Aluminium plate fin / Copper tube
2
1,5
250 V - 3,15 A
SAC W-REM
1…. Ø 443
Centrifugal fan
2,54mm-5pcs
SFG6X-41D6P…1
6 … 470
0,611
SAC ON-OFF IDU
Microprocessor
10
CWX8B5XAB
Controller PCB
Part No.
Controls
Control circuit fuse
Jumper setting JP1..JP5
Remote Control Unit
Fan & Fan Motor
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V, High)
Running Amps A
Power input W
Coil resistance (Ambient temp. 20 °C )
Ω
BRN-WHT: 75,1
WHT-VLT: 6,7
VLT-ORG: 20,6
ORG-YEL: 27,4
WHT-PNK: 42,7
YEL-BLK: 58
Safety devices Type
Operating temp. Open °C
Close °C
Run capacitor µF
VAC
Flap Motor
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
m
2
Quantity of water l
DATA SUBJECT TO CHANGE WITHOUT NOTICE
4,5
450
38
Internal thermal protector
130 ± 8
79 ± 15
SAC ON-OFF IDU
Microprocessor
1,5
250 V - 3,15 A
SAC W-REM
1…. Ø 443
Centrifugal fan
2,54mm-5pcs
SFG6X-81A6P…1
6 … 530
0,765
0,556
1,50
Stepping motor
MP24Z2
DC 12 V
400 ± 7%
Aluminium plate fin / Copper tube
2
11
CWX10B5XAB
Controller PCB
Part No.
Controls
Control circuit fuse
Jumper setting JP1..JP5
Remote Control Unit
Fan & Fan Motor
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V, High)
Running Amps A
Power input W
Coil resistance (Ambient temp. 20 °C )
Ω
BRN-WHT: 75,1
WHT-VLT: 6,7
VLT-ORG: 20,6
ORG-YEL: 27,4
WHT-PNK: 42,7
YEL-BLK: 58
Safety devices Type
Operating temp. Open °C
Close °C
Run capacitor µF
VAC
Flap Motor
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
m
2
Quantity of water l
DATA SUBJECT TO CHANGE WITHOUT NOTICE
0,556
1,50
Stepping motor
MP24Z2
DC 12 V
400 ± 7%
Aluminium plate fin / Copper tube
2
1,5
250 V - 3,15 A
SAC W-REM
1…. Ø 443
Centrifugal fan
2,54mm-5pcs
SFG6X-81A6P…1
6 … 530
0,765
SAC ON-OFF IDU
Microprocessor
6
450
38
Internal thermal protector
130 ± 8
79 ± 15
12
1-3 Other Component Specifications
CWX3B5XAB CWX5B5XAB
Thermistor ( Coil sensor TH1
)
Resistance
Κ
Ω
Drain pump
Model
Rating Voltage
Input
Total head capacity
Safet
y
float switch
Model
Contact rating
CWX6B5XAB CWX8B5XAB CWX10B5XAB
Thermistor ( Room sensor
)
Resistance
k
Ω
Thermistor ( Coil sensor
)
Resistance
k
Ω
Drain pump
Model
Rating Voltage
Input
Total head / capacity
Safet
y
float switch
Model
Contact rating
10 ± 3%
NTC-THERMISTOR
10 at 25 °C
PC 309564003
220/240V - 50Hz
14W
0,4 l/min
BI 1300 2725
230V AC/DC - 0,5A
NTC-THERMISTOR
10 at 25 °C
PJV-1434A
FS-0218-102
DC 5V - 50W
230V
12W
500 mm / 400 cc/min.
13
2. DIMENSIONAL DATA
CWX3B5XAB CWX5B5XAB
14
CWX6B5XAB
12
776
225
8
12
X-vi ew
124
124
7
5
6
292
232
100
339
221
59
157
182
261
860
500
500
860
2
2
1
221
308
30
48
124
124
1212 100
776
7
3
4
566 (Suspention bolt pitch)
820 (Ceiling opening)
820 (Ceiling opening)
377
Panel center
757 (Suspention bolt pitch)
368 25
9
X
Air intake grille
Air outlet
Refrigerant liquid line [D. 9.52 (In case of 25 typ
e
,
use the tube connector.)]
Refrig erant gas line
D. 12.7: 9, 12 type
Drain connection
Power supply entry
For discharge duct
For fresh air intake
Suspension bolt mounting
9
15
CWX8B5XAB CWX10B5XAB
856 (Suspention bolt pitch)
820 (Ceiling opening)
1110 (Ceiling opening)
522
Panel center
757 (Suspention bolt pitch)
513 25
9
8
8
3
2
2
1
4
X
X-vi ew
124
124
124
338
30
48
124
1066
12
100
12
1212
244
249
776
180
57
6
244
182
157
59
291
292 339
232
790
1150
860
500
Air intake grille
Air outlet
Refrigerant liquid line (D.9.52)
Refrigerant gas line (D.19.05)
Drain connection
Power su pp ly ent r y
For discharge duct
For fresh air intake
Suspension bolt mounting
9
16
3. ELECTRICAL DATA
3-1 Electric Wiring Diagrams
CWX3B5XAB CWX5B5XAB
CWX6B5XAB CWX10B5XAB
17
CWX8B5XAB
18
3-2 JUMPERS CONFIGURATION
Jumpers are located on the indoor PCB near the MODE button.
1 - Setting JUMPERS
C = Closed
O = Open
2 - Fonction
A = Available
E = Not available
(when selecting, all leds
blinking)
NOTE: settings different from the factory one must be done by special worker
FACTORY SYSTEM CONFIGURATION:COOLING ONLY WITH VALVE
COOLING ONLY
SYSTEM
FUNCTIONSFUNCTIONS
JUMPERS
19
SYSTEM CONFIGURATION:COOLING OR HEATING WITH VALVE
SYSTEM CONFIGURATION:HEATING ONLY WITH VALVE
SYSTEM CONFIGURATION:COOLING WITH VALVE OR HEATING WITH VALVE
COOLING ONLY
SYSTEM
COOLING ONLY
SYSTEM
FUNCTIONS
FUNCTIONS
JUMPERS
JUMPERS
COOLING ONLY
SYSTEM
FUNCTIONS
JUMPERS
20
3-3 CONTACTS FOR BUILDING AUTOMATION
3-3.1 INPUT CONTACT (J4 - green)
The status of this input affects system operation according to the following:
Contact OPEN : system does not operate (always OFF) – inputs from wireless remote controller are not processed
Contact CLOSED: system operates in the normal way according to the inputs coming from wireless remote controller
3-3.2 OUTPUT CONTACT (J12)
This connector is directly tied to the contact (normally open) of a power relay which activates every time the following alarm
condition occur:
•
RAT damaged
•
ICT damaged
In this case when alarm happens, on poles 1 and 3 of J12 connector, 220 VAC-50Hz are available.
Max electrical load: 1A- 240VA
C
21
3-4 MAINTENANCE
Changing the Address of the Air Conditione
r
In case of more than one air conditioner operating in the same room, it may be necessary to assign an address to each
unit in order to avoid operation conflicts. Address is set acting on the dip-switches located on the indoor PCB and on the
remote controller. The PCB settings must match the corresponding ones on the wireless remote controller.
How to change address of the air conditione
r
Dip switch is located on the indoor PCB near the buzzer.
Set the PCB to the address desidered
As default switches SW1 and SW2 are in off status (PCB factory state).
How to change address on Remote Control Uni
t
Dip switch is located on the battery compartment.
1) Pull out the door and remove the batteries.
2) Set the switch SW1 and SW2 according to the indoor PCB settings
(do not act on SW3 and SW4)
3) Insert the batteries and pull on the door
As default switches SW1 and SW2 are in off status (remote controller factory state).
unit remote control
indoor unit
REMOTE CONTROL
PCB
22
4.FUNCTION
4-1 Cool Mode Operation
NOTES
1. In this graph, the FMI is operating with the “Auto Fan Speed” setting. If the user has selected the Low,
Medium or High fan speed, the FMI will run at that speed only.
2. The indoor fan can change speed only after it has operated at the same speed for 30 sec if in AUTO and 1
sec for the other settings (High, Med, Low).
V
ALVE
23
4-2 Heat Mode Operation
The Heating mode operation is similar to the Cooling mode operation. The VALVE and FMI are mainly
controlled by the value of (RAT – SPT). In the graph above, the FMI is operating in AUTO speed mode.
Therefore, the FMI speed changes automatically according to the (RT - SPT).
NOTES
1. After VALVE is switched off, the FMI runs for 30s in order to purge heat from the indoor coil.
2. The FMI will not be turned on until the indoor coil temperature is warm enough to prevent the supply of
cool air (see COLD DRAFT PREVENTION mode for details). The indoor fan can change speed only after it
has operated at the same speed for 30 sec if in AUTO and 1 sec for the other settings (High, Med, Low).
V
ALVE
24
4-3 Auto (cool/heat) Mode Operation
In Auto Mode, the unit switches automatically between the Auto Cooling and Auto Heating in order to
maintain the room temperature (RAT) at the prescribed set point (SPT).
The switching between the two modes is according to the above graph.
Refer to the sections 5.1 COOLING MODE and 5.2 HEATING MODE for system operation details.
V
ALVE(COOL
)
V
ALVE(HEAT
))
25
4-4 Dry Mode Operation
Dry operation remove moisture from indoor air running, in cooling mode, at a low level without reducing the
ambient temperature. This is done cycling ON and OFF indoor and outdoor units according to below.
ROOM DRY LEVEL JP4 OPEN JP4 CLOSED
TEMP
Operation according to Operation according to
≥ SPT+2°C LEVEL 0 COOLING mode COOLING mode
CM off CM off
< SPT+2°C LEVEL 1 FMO on FMO off
≥ SPT-1°C FMI runs at LOW speed FMI runs at LOW speed
RV off RV off
CM off CM off
< SPT-1°C LEVEL 2 FMO switches 3 minutes FMO off
≥ 15°C
on and 9 minutes off
FMI switches LL and L FMI switches LL and L
during FMO operation
(3 MIN. on and 9 OFF)
RV off RV off
CM off CM off
< 15°C DRY OFF ZONE FMO off FMO off
FMI off FMI off
RV off RV off
SPT = Set Point Temperature
4-5 Fan Mode Operation
With this mode, the indoor fan is turned on while cooling and heating valve stay off all the time. The user can
select between 3 speeds: HIGH, MEDIUM and LOW.
4-6 Auto Fan speed
With this option selected, the indoor fan speed changes automatically according to the difference between
the detected air temperature (RAT sensor) and the set point (SPT):
COOLING MODE
2 ≤ (RAT – SPT):
HIGH speed
1 ≤ (RAT – SPT) < 2: MEDIUM speed
(RAT – SPT) < 1: LOW speed
HEATING MODE
2 ≤ (SPT - RAT):
HIGH speed
(SPT - RAT) < 2: MEDIUM speed
NOTE
SPT = Set Point Temperature
26
4-7 Forced Mode
In this mode the system operates (COOLING or HEATING mode – fixed settings) or is switched off by
means of the MODE button of the indoor unit control board. The operation modes can be selected
pressing the button in a cyclic way (OFF Ö COOL Ö HEAT Ö OFF…). The settings are:
COOLING mode
SET POINT temperature = 25°C
FAN SPEED = HIGH
HEATING mod
e
SET POINT temperature = 21°C
FAN SPEED = HIGH
4-8 Protection operations in Heat Mode
5-8.1 Cold draft
This feature prevents the supply of cold air forcing the indoor fan to a speed which cannot be changed
by the user. As soon as the protection mode is exited speed can be changed manually through the
remote controller. The protection acts in the following
27
4-8.2 Overhea
t
This feature prevents the build up of high pressure in the indoor heat exchanger during heating
operation
A (°C)
65
B (°C)
55
A
B
VALVE (HEAT)VALVE (HEAT)
28
4-9 I FEEL Function
As standard configuration the air conditioner operates detecting the room temperature through the sensor
equipped in the wireless remote controller (icon I FEEL shown on the display). This feature provides a
personalised environment since the temperature can be detected where the remote controller is located.
It is possible to de-activate this option pressing the I FEEL button on the remote controller.
In this case the I FEEL icon is no longer displayed and room temperature is detected through the sensor
included in the indoor unit.
4-10 NIGHT Function
When this function is active, room temperature changes automatically to compensate for body temperature
variations while sleeping. After 10 hours of operation system switches automatically to OFF state.
This mode of operation is available both in COOLING and HEATING mode.
4-11 DRAIN PUMP Mode
This unit is equipped with a drain pump
The level detection is done through a float switch connected at the input WS (closed under normal condition,
and opened when water overflow). System operation is according to the following chart:
OPERATION
led
CM
FMO
Open
Closed
Blink
ON
OFF
Overflow when
THERMO is ON
Overflow when
THERMO is OFF
ON
OFF
Drain
pump
ON
OFF
Thermostat
ON
OFF
Overflow when
unit is OFF (standby)
T < 10 min
29
4-12 Diagnostic
With this feature is possible to have a visual signal that a trouble is occurring.
This mode is always active and the signalling is made through the display board LEDS .
In case of no troubles the LEDS status follows its normal function.
NOTES
The troubles are showed according a priority list that is in case of more than one
trouble present, is always showed, at first, the one with the highest priority (1 2 3 etc).
Sensor damaged means a situation where sensor is short-circuited or opened.
In case of damaged sensors, the system (CM, FMO, FMI etc), if in OFF state, does not start.
Priority TROUBLE
LD1(stby) LD2(opr) LD3(timer)
2 RAT damaged F O O
3 ICT damaged F F O
4 WRONG MODE F F F
SELECTED
5 Water level alarm O F O
O = LED off
z = LED on
F = LED blinking
WARNING: Priority 4 only for COOLING
See paragraph
4-9 DRAIN PUMP MODE
LEDS status Effects
System does not operate
System does not operate
30
5 CHECKING ELECTRICAL COMPONENTS
5-1 Measurement of Insulation Resistance
The insulation is in good condition if the resistance exceeds 1 MOhm
a) Power Supply Wires
Clamp the earthed wire of the power supply wires
with the lead clip of the insulation resistance tester
and measure the resistance by placing a probe on
either of the power wires (fig.1).
Then measure the resistance between the earthed
wire and the other power wires (fig.1).
b) Unit
Clamp an alluminium plate fin or copper tube with
the lead clip of the insulation resistance tester and
measure the resistance by placing a probe on N terminal,
and then on Lterminal the terminal plate (fig.2)
c) Measurement of Insulation Resistance
for Electrical Parts
Disconnect the lead wires of the disired electric
part from terminal plate, PCB assy, capacitor, etc.
Similary disconnect the connector. Then measure
the insulation resistance (fig.1 to 4).
Refer to electric wiring diagram.
NOTE
If the probe cannot enter the poles because the hole is too narrow
then use a probe with a thinner pin.
31
5-2 Checking Continuity of fuse on PCB assy
Remove PCB assy from electrical component box (fig.5)
Then pull out the fuse from PCB assy
Check continuity of fuse by the multimeter (fig.6)
32
R.D. 28 Reyrieux BP 131 - 01601 Trévoux CEDEX France
Tél. 04.74.00.92.92 - Fax 04.74.00.42.00
R.C.S. Bourg-en-Bresse B 759 200 728
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