Argo AWI726HLI Manual

TECHNICAL DATA
& SERVICE MANUAL
INDOOR UNIT: AWI726HL(I)
AWI735HL(I)
REF09HI
REF12HI
SPLIT SYSTEM AIR CONDITIONER
Model No. Product Code No.
AWI726HL(I) 38.7004.070
0.8180.559.00 july 2008
AWI735HL(I) 38.7004.071
REF09HI 38.7004.072
REF12HI 38.7004.073

IMPORTANT!
Please read before installation
This air conditioning system meets strict safety and operating
standards.
For the installer or service person, it is important to install or
service the system so that it operates safely and efficiently.
For safe installation and trouble-free operation, you must:
• Carefully read this instruction booklet before beginning.
• Follow each installation or repair step exactly as shown.
• Observe all local, state and national electrical codes.
• Pay close attention to all warning and caution notices given in
this manual.
•The unit must be supplied with a dedicated electrical line.
This symbol refers to a hazard or unsafe practice which can result
in severe personal injury or death.
This symbol refers to a hazard or unsafe practice which can result
in personal injury or product or property damage.
If necessary, get help
These instructions are all you need for most installation sites and
maintenance conditions.
If you require help for a special problem, contact our sale/service
outlet or your certified dealer for additional instructions.
In case of improper installation
The manufacturer shall in no way be responsible for improper
installation or maintenance service, including failure to follow the
instructions in this document.
SPECIAL PRECAUTIONS
• During installation, connect before the refrigerant system and
then the wiring one; proceed in the reverse orden when removing
the units.
When wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A QUALIFIED,
EXPERIENCED ELECTRICIANS SHOULD ATTEMPT
TO WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing are
completed or reconnected and checked, to ensure the grounding.
• Highly dangerous electrical voltages are used in this system.
Carefully refer to the wiring diagram and these instructions when
wiring.
Improper connections and inadequate grounding can cause
accidental injury and death.
•Ground the unit following local electrical codes.
• The Yellow/Green wire cannot be used for any connection
different from the ground connection.
• Connect all wiring tightly. Loose wiring may cause overheating
at connection points and a possible fire hazard.
• Do not allow wiring to touch the refrigerant tubing, compressor,
or any moving parts of the fan.
• Do not use multi-core cable when wiring the power supply and
control lines. Use separate cables for each type of line.
When transporting
Be careful when picking up and moving the indoor and outdoor
units. Get a partner to help, and bend your knees when lifting to
reduce strain on your back. Sharp edges or thin aluminium fins on
the air conditioner can cut your fingers.
When installing...
... In a ceiling or wall
Make sure the ceiling/wall is strong enough to hold the unit-weight.
It may be necessary to build a strong wooden or metal frame to
provide added support.
... In a room
Properly insulate any tubing run inside a room to prevent
"sweating", which can cause dripping and water damage to walls
and floors.
... In moist or uneven locations
Use a raised concrete base to provide a solid level foundation for
the outdoor unit.
This prevents damage and abnormal vibrations.
... In area with strong winds
Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.
... In a snowy area (for heat pump-type systems)
Install the outdoor unit on a raised platform that is higher than
drifting snow. Provide snow vents.
When connecting refrigerant tubing
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of the flare
and union tubes before connecting them; screw by hand and
then tighten the nut with a torque wrench for a leak-free
connection.
• Check carefully for leaks before starting the test run.
NOTE:
Depending on the system type, liquid and gas lines may be either
narrow or wide. Therefore, to avoid confusion, the refrigerant
tubing for your particular model is specified as narrow tube for
liquid, wide tube for gas.
When servicing
• Turn the power OFF at the main power board before opening
the unit to check or repair electrical parts and wiring.
• Keep your fingers and clothing away from any moving parts.
• Clean up the site after the work, remembering to check that no
metal scraps or bits of wiring have been left inside the unit being
serviced.
• Ventilate the room during the installation or testng the refrigeration
system; make sure that, after the installation, no gas leaks are
present, because this could produce toxic gas and dangerous
if in contact with flames or heat-sources.
WARNING
CAUTION
WARNING
2

Page
1. SPECIFICATIONS 4
1-1 Unit specifications 4
1-2 Major Component specifications 6
1-3 Other Component specifications 8
2. DIMENSIONAL DATA 9
3. PERFORMANCE DATA 11
3-1 Air Throw Distance Chart 12
4. ELECTRICAL DATA 13
4-1 Electric Wiring Diagrams 13
5. FUNCTION 15
5-1 System operation control 15
5-2 Cool Mode Operation 16
5-3 Heat Mode Operation 16
5-4 Auto Mode Operation 17
5-5 Dry Mode Operation 18
5-6 Fan Mode Operation 18
5-7 Auto Fan Speed 18
5-8 Forced-Mode 19
5-9 Protection Operations in indoor unit 19
5-10 Protection Operation outdoor unit 20
5-11 Defrost 21
5-12 I Feel Function 21
5-13 Hi Power mode 21
5-14 Night Function 22
5-15 Leds off function 22
5-16 Capacity Test Mode 22
5-17 Diagnostic 23
5-18 Indoor unit jumpers Configuration 24
5-19 Outdoor unit jumpers Configuration 25
5-20 Contacts for building automation 25
5-21 Maintenance 27
6. TROUBLESHOOTING 28
6-1 Check before and after troubleshooting 28
6-2 Circuit Breaker Trips or Fuse Blows 28
6-3 System does not run 29
6-4 Outdoor unit does not run and no fault is displaied 31
6-5 Only outdoor unit is off 31
6-6 Fault on outdoor unit 32
6-7 Air Conditioner operates, but abnormalities are observed 33
6-8 Noisy problem 35
7. CHECKING ELETRICAL COMPONENTS 36
7-1 Measurement of Insulation Resistance 36
7-2 Checking Continuity of Fuse on PCB Assy 37
Table of Contents
3

1. SPECIFICATIONS
1-1 Unit Specifications
AWI726HL(I)
REF09HI
Power source
V
oltage rating
Performance
Capacity
Air circulation (High) m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction Horizontal
Vertical
Air Filter
Power noise level High/Med./Low dB-A
Refrigerant tubing connections
Refrigerant Narrow tube mm(in.)
tube diameter Wide tube mm(in.)
Refrigerant
Refrigerant tube kit / Air clean filter
Dimensions & Weight
Unit dimensions Height mm
Width mm
Depth mm
Package dimensions Height mm
Width mm
Depth mm
Weight Net kg
Shipping kg
Shipping volume m3
DATA SUBJECT TO CHANGE WITHOUT NOTICE
R410A
Flare type
Washable, Anti-Mold
39/36/29/23
Cooling Heating
See catalogue with the requested matching
450
273
Microprocessor/ I.C. thermostat
Wireless remote control unit
3 and Auto
ON/OFF 24 hours
270
Manual
Auto
9.52 (3/8)
Optional / Optional
0.075
220 - 240 V ~ 50 Hz
230 V - 50 Hz
855
322
8.0
10.0
6.35 (1/4)
805
218 ( 211 Reflexo)
4

AWI735HL(I)
REF12HI
Power source
V
oltage rating
Performance
Capacity
Air circulation (High) m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction Horizontal
Vertical
Air Filter
Power noise level High/Med./Low dB-A
Refrigerant tubing connections
Refrigerant Narrow tube mm(in.)
tube diameter Wide tube mm(in.)
Refrigerant
Refrigerant tube kit / Air clean filter
Dimensions & Weight
Unit dimensions Height mm
Width mm
Depth mm
Package dimensions Height mm
Width mm
Depth mm
Weight Net kg
Shipping kg
Shipping volume m3
DATA SUBJECT TO CHANGE WITHOUT NOTICE
Wireless remote control unit
See catalogue with the requested matching
Microprocessor/ I.C. thermostat
470
220 - 240 V ~ 50 Hz
230 V - 50 Hz
Cooling Heating
322
8.0
10.0
0.075
805
218 ( 211 Reflexo )
273
855
9.52 (3/8)
R410A
Optional / Optional
270
Washable, Anti-Mold
39/36/29/23
Flare type
6.35 (1/4)
ON/OFF 24 hours
3 and Auto
Manual
Auto
5

1-2 Major Component Specifications
AWI726HL(I)
REF09HI
Controller PCB
Part No.
Controls
Control circuit fuse
Remote Control Uni
t
Fan & Fan Moto
r
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V, Hi)
Nominal output W
Coil resistance (Ambient temp. 20 °C )
Ω
Safety devices Type
Operating temp. Open °C
Close
Run capacitor µF
VAC
Flap Moto
r
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
DATA SUBJECT TO CHANGE WITHOUT NOTICE
0,130
SAC DCI IDU
SAC W-REM
Cross - flow
KFV4Q-11H5P-S…1
4…1160
Aluminium plate fin / Copper tube
DC 12 V
380 ± 7%
2
1,4
440
MP24GA1
Stepping motor
10
YEL-ORG: 155,7
Microprocessor
250 V - 3,15 A
1…. Ø 95 / L 617
1
-
BRN-WHT: 561,8
VLT-ORG: 63,4
YEL-PNK: 115,9
internal fuse
145 ± 5
VLT-WHT: 197,4
6

AWI735HL(I)
REF12HI
Controller PCB
Part No.
Controls
Control circuit fuse
Remote Control Uni
t
Fan & Fan Moto
r
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V, Hi)
Nominal output W
Coil resistance (Ambient temp. 20 °C )
Ω
Safety devices Type
Operating temp. Open °C
Close
Run capacitor µF
VAC
Flap Moto
r
Type
Model
Rating
Coil resistance (Ambient temp. 25 °C )
Ω
Heat Exch. Coil
Coil
Rows
Fin pitch mm
Face area
DATA SUBJECT TO CHANGE WITHOUT NOTICE
YEL-ORG: 155,7
-
1
440
YEL-PNK: 115,9
internal fuse
145 ± 5
0,130
Stepping motor
MP24GA1
DC 12 V
380 ± 7%
Aluminium plate fin / Copper tube
2
1,4
250 V - 3,15 A
SAC W-REM
1…. Ø 95 / L 617
Cross - flow
SAC DCI IDU
Microprocessor
BRN-WHT: 561,8
VLT-ORG: 63,4
VLT-WHT: 197,4
KFV4Q-11H5P-S…1
4…1160
10
7

1-3 Other Component Specifications AWI726HL(I)
AWI735HL(I)
REF09HI
REF12HI
Trasformer
(
TR
)
Rating Primary
Secondary
Capacity
Coil resistance Ω
(
at 25°C
)
Thermal cut-off temp.
Thermistor
(
Coil sensor
)
Resistance k
Ω
Thermistor
(
Room sensor
)
Resistance k
Ω
0028TRA008
AC 230 V, 50 Hz
13 V - 6VA
NTC-THERMISTOR
10 at 25 °C
NTC-THERMISTOR
Primary: -
Secondary: -
120°C
10 at 25 °C
8

2. DIMENSIONAL DATA
AWI726HL(I)
AWI735HL(I)
9

2. DIMENSIONAL DATA
REF09HI
REF12HI
10

3. PERFORMANCE DATA
3-1 Air Throw Distance Chart
AWI726HL(I)
REF09HI
Horizontal distance (m)
Axis air verocity (m/s)
Vertical distance (m)
Room air temp. : 20°C
Fan speed : High
Heating
Horizontal distance (m)
Axis air verocity (m/s)
Vertical distance (m)
Room air temp. : 27°C
Fan speed : High
Cooling
0
1
2
3
4
0123456789
: Flap angle 0° , : Axis air velocity 0°
: Flap angle 30°, : Axis air velocity 30°
0
1
2
3
4
0123456789
: Flap angle 45° , : Axis air velocity 45°
: Flap angle 60° , : Axis air velocity 60°
11

AWI735HL(I)
REF12HI
Horizontal distance (m)
Axis air verocity (m/s)
Vertical distance (m)
Room air temp. : 20°C
Fan speed : High
Heating
Horizontal distance (m)
Axis air verocity (m/s)
Vertical distance (m)
Room air temp. : 27°C
Fan speed : High
Cooling
0
1
2
3
4
0123456789
: Flap angle 0° , : Axis air velocity 0°
: Flap angle 30°, : Axis air velocity 30°
0
1
2
3
4
0123456789
: Flap angle 45° , : Axis air velocity 45°
: Flap angle 60° , : Axis air velocity 60°
12

4. ELECTRICAL DATA
4-1 Electric Wiring Diagrams
AWI726HL(I)
AWI735HL(I)
13

REF09HI
REF12HI
14

5.FUNCTION
5-1 System operation control
The inputs to the systems come from indoor and outdoor sensors. The outdoor unit is the system
MASTER while the indoor one is the SLAVE.
Communication between units is made with a 2 poles RS485 bus
The indoor units receives the user input (fan speed, flap position etc) through remote controller
which sends signal every time a button is pressed and in any case, automatically, every 5 minutes.
5.1.1 control specification
During operation compressor speed can be subjected to change due to thermal load variations
or protection activations but in any case:
•The minimum time interval between an OFF and a ON operation is not lower than 3 minutes
•The minimum operating time is not lower than 3 minutes
•The acceleration/deceleration rate is fixed at 50rpm /sec
• During the start-up compressor speed increases according to a defined rule which is
independent from the thermal load calculation.
15

5
-
2
C
oo
l
M
o
d
e
O
pera
ti
on
In Cooling Mode, the operation of the compressor (CM), Outdoor Fan (FMO) and Indoor Fan (FMI) are
determined by:
1) the difference between the room air temperature (RAT) and the set point temperature (SPT)
2) the protection level at which the system is operating
NOTES
In addition to the temperature difference of above, the operation of the main components (CM, FMO,
FMI) is also controlled by protection function.
The minimum off time of compressor is 3 minutes.
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).
5-3 Heat Mode Operation
The Heating mode operation is similar to the Cooling mode operation. The CM, FMO and FMI are controlled
by the same parameters.
NOTES
1. After the CM has stopped, 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
cold air (see COLD DRAFT PREVENTION feature 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).
16

5-4 Auto 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 and following table
If -3°C ≤Dt ≤-1°C and the compressor is off for more than 1 hour
If Dt ≤-3°C and compressor is off for more than 3 minutes
If 1°C ≤Dt ≤3°C and the compressor is off for more than 1 hour
If Dt ≥3°C and compressor is off for more than 3 minutes
Dt = RAT - SPT
Refer to the sections 5.1 COOLING MODE and 5.2 HEATING MODE for system operation details.
COOLING ---> HEATING
HEATING ---> COOLING
17

5-5 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
TEMP
≥SPT+2°C LEVEL 0 Operation according to COOLING mode
CM on at constant speed
< SPT+2°C LEVEL 1 FMO on at constant speed
≥SPT-1°C FMI switches between L and LL every 30 seconds
RV off
CM switches 9 minutes off and 3 minutes on
< SPT-1°C LEVEL 2 FMO switches 9 minutes off and 3 minutes ON
≥15°C FMI switches between L and LL every 30 seconds
RV off
CM off
< 15°C DRY OFF ZONE FMO off
FMI off
RV off
SPT = Set Point Temperature
5-6 Fan Mode Operation
With this mode, the indoor fan is turned on while CM, FMO and RV stay off all the time. The user can select
between 3 speeds: HIGH, MEDIUM and LOW.
5-7 Auto Fan speed
With this option selected, the indoor fan speed changes automatically according to the compressor speed:
as shown in the following graphs
to prevent the supply of cool air, the FMI speed is setted as shown only if the indoor coil temperature ICT ≥32°C
( see COLD DRAFT PREVENTION feature for details )
18

5-8 Forced Mode
In this mode the system operates (COOLING or HEATING mode – fixed settings) or is switched off by
means of the MODE button on the indoor unit control board. The operation modes can be selected
pressing the button in a cyclic way (OFF COOL HEAT OFF…). The settings are:
COOLING mode
SET POINT temperature = 25°C
FAN SPEED = HIGH
FLAP POSITION = 3
HEATING mode
SET POINT temperature = 21°C
FAN SPEED = HIGH
FLAP POSITION = 4
5-9 Protection operations indoor unit
5-9.1 Freeze-up
This protection prevents ice formation on the indoor coil heat exchanger. The protection is activated
as soon as the indoor coil temperature ICT decreases and acts by decreasing the compresor speed
The system exit this protection routine when ICT temperature rises above 8°C.
5-9.2 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
5-9.3 Overheat
This feature prevents the build up of high pressure in the indoor heat exchanger during heating operation.
As soon as the indoor coil temperature (ICT) increases, compressor speed is reduced in order to avoid
heat exchanger overheating. System stops compressor operation when ICT reaches 60 °C
19

5-10 Protection operations on outdoor unit
5-10.1 Overheating
During cooling operation as soon as the outdoor coil temperature (OCT) increases, compressor speed
is reduced in order to avoid heat exchanger overheating. System stops compressor operation when OCT reaches 60 °C
5-10.2 Compressor discharge temperature
During operation, as soon as the discharge temperature increases, (CDT) compressor speed is reduced
in order to avoid overheating of the motor. Compressor is stopped when CDT reaches 105°C
5-10.3 Compressor power-module overheating
The module temperature, detected by a built-in thermistor, is always monitored by the control system and kept
operating in a safe area. If temperature exceeds 100°C, operation is automatically stopped.
5-10.4 Outdoor fan power-module overheating
The module temperature, detected by a built-in thermistor, is always monitored by the control system and kept
operating in a safe area. If temperature exceeds 100°C, operation is automatically stopped.
5-10.5 Compressor power-module overcurrent
In case of current driven to each motor phase greater than 10 A operation is automatically stopped
5-10.6 Outdoor fan power-module overcurrent
In case of current driven to each motor phase greater than 400mA operation is automatically stopped
20