Carrier 38GLS...G Installation manual

38GL...G / 38GLS...G
R QUALIT
TE
SURANC
E
AS
•
L
INSTALLATION MANUAL
Y
YD'S REGI
S
LO
38YY...G / 38YYS...G
IS O
900 1
For operation and maintenance instructions of this unit as well as installation
instructions of the indoor unit, refer to the relevant manuals.
Contents
Page
2
2
3
3
3
4
5
6/8
9/10
10
11
12
12
Dimensions and weight .................................................................................................................
Connections ...................................................................................................................................
Minimum clearances ......................................................................................................................
Operating limits ..............................................................................................................................
Accessories ...................................................................................................................................
General information .......................................................................................................................
Warnings: avoid .............................................................................................................................
Refrigerant connections ................................................................................................................
Electrical connections ...................................................................................................................
Electrical data ................................................................................................................................
Pump down and refrigerant circuit .................................................................................................
Unit maintenance ...........................................................................................................................
Troubleshooting and guide for the owner .......................................................................................
ATTENTION INSTALLERS AND SERVICE TECHNICIANS!
AIR CONDITIONER WITH R-410A–QUICK REFERENCE GUIDE
ENGLISH
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
Cooling only and heat pump split system outdoor units
• R-410A refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing
equipment and replacement components are designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A refrigerant cylinders have a dip tube which allows liquid to flow out with the cylinder in a
vertical position with the valve at the top.
• R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device
in the manifold hose in order to vaporize the liquid refrigerant before it enters in the unit.
• R-410A, as other HFCs, is only compatible with oils selected by the compressor manufacturer.
• A vacuum pump is not enough to remove moisture from oil.
• Oils absorb moisture rapidly. Do not expose oil to atmosphere.
• Never open system to atmosphere while it is under vacuum.
• When the system must be opened for service, break vacuum with dry nitrogen and replace filter driers.
• Do not vent R-410A into the atmosphere.
• Use only Carrier matching indoor units (Table I).
Unit size
Oil type
Quantity
cc
Drier already installed on
liquid line of the unit
018 - 024
028 - 036
048
POE
POE
POE
1120
1250
1400
YES
YES
YES
Table I
Cooling only(A/C) Heat pump (H/P) Hi-Wall series Hi-Wall series Console series Cassette series
Satellite
Cooling only
Heat pump
“42PHQ---N” “42HMC---N” “42VMC---N” “40KMC---N” “40SMC---N”
38GL(S)018G
38YY(S)018G
42PHQ018N 42HMC018N 42VMC018(A)*N 40KMC018N 40SMC018N
38GL(S)024G
38YY(S)024G
42PHQ024N 42HMC024N 42VMC024(A)*N 40KMC024N 40SMC024N
38GL028G
38YY-028G
—
—
42VMC028 N 40KMC028N 40SMC028N
38GL036G
38YY-036G
—
—
42VMC036 N 40KMC036N 40SMC036N
38GL048G
38YY-048G
—
—
42VMC048 N 40KMC048N 40SMC048N
Power
supply
230V ~ 50Hz
*(A)= Aluminium version
GB - 1
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Dimensions and weight
A
A
A
B
B
E
D
E
B
E
D
E
F C
C
F
38GL(S)018G, 024G
38YY(S)024G
38YY(S)018G
A
B
C
D
E
F
D
E
F
C
Mod. 38GL-028G, 036G
Mod. 38YYS024G
Mod. 38YY-024G, 028G, 036G
Mod. 38GL(S)018G, 024G
Mod. 38YY(S)018G
Mod.
E
Mod. 38GL-048G
Mod. 38YY-048G
38GL-028G, 036G
38GL-048G
38YY-028G, 036G
38YY-048G
18
24
28
36
48
mm
800
800
800
800
800
mm
590
803
803
803
1264
mm
300
300
300
300
300
mm
508
508
508
508
508
mm
146
146
146
146
146
mm
330
330
330
330
330
kg
46
52
67
68
94
Connections
Table II: Connections
Model
1
햲 Outdoor unit
햳 Indoor unit
햴 Height difference
18
24
28
36
48
Max. height difference
30 m
40 m
40 m
40 m
50 m
Max. pipe length
10 m
15 m
25 m
30 m
30 m
All fittings are flare type.
Use only refrigeration grade pipes, (Cu DHP type according to
ISO 1337), seamless, degreased, deoxidized and suitable for operating pressures of at
least 4200 kPa and with a burst pressure of 20700 kPa.
Under no circumstances must sanitary type copper pipe be used.
3
Mod.
2
GB - 2
18
24
28
36
48
Pipe diameter
Gas
Liquid
(Suction) (Liquid)
mm
Pipe diameter
Gas
Liquid
(Suction) (Liquid)
inches
12.70
6.35
1/2”
1/4”
15.87
6.35
5/8”
1/4”
19.05
9.52
3/4”
3/8”
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Minimum clearances
ENGLISH
D
A
C
B
E
Mod.
18
24
28
36
48
A
mm
50
100
100
100
100
B
mm
250
250
250
250
250
C
mm
500
500
500
500
500
D
mm
50
50
100
100
100
E
mm
470
470
670
670
670
F
mm
400
400
400
400
400
System charge
Model
Refrigerant
charge (g)
Suitable up to Extra charge
m
g/m
Extra charge (g) with indoor unit
42VMC---(A)N 40SMC---N
38GL(S)018G
1090
8
15
–
–
38GL(S)024G
1265
8
15
220
150
38GL(S)028G
2100
8
30
–
100
38GL(S)036G
1980
8
40
–
450
38GL(S)048G
3300
8
70
–
300
38YY(S)018G
1530
8
15
–
–
38YY(S)024G
1900
8
30
370
150
38YY(S)028G
2340
8
30
–
100
38YY(S)036G
2190
8
40
–
450
38YY(S)048G
3650
8
70
–
300
E-3
GB
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
General information
R-410A systems operate at higher pressures than standard
R-22 systems. Do not use R-22 service equipment or
components on R-410A equipment.
Read this instruction manual thoroughly before starting the
installation.
• This unit complies with low-voltage (EEC/73/23) and electromagnetic compatibility (EEC/89/336) directives.
• Check that the impedance of the mains power supply is in
conformance with the unit power input indicated in the
electric data table IV, on page 10 (EN 61000-3-11).
• The installation must be carried out by a qualified installer.
• Follow all current national safety code requirements. In particular
ensure that a properly sized and connected ground wire is in
place.
• Check that voltage and frequency of the mains power supply are
those required; the available power must be adequate to operate
any other possible appliances connected to the same line.
Also ensure that national safety code requirements have been
followed for the mains supply circuit.
• The mains supply must be connected to the outdoor unit.
• Connect indoor and outdoor units with field-supplied copper pipes
by means of flare connections. Use insulated seamless refrigeration
grade pipe only, (Cu DHP type according to ISO1337),
degreased and deoxidized, suitable for operating pressures of
at least 4200 kPa and for burst pressure of at least 20700 kPa.
Under no circumstances must sanitary type copper pipe be used.
• After installation thoroughly test the system operation and explain
all system functions to the owner.
• Leave this manual with the owner for consultation during future
periodic maintenance.
• Use this unit only for factory approved applications.
• This installation manual describes the installation procedures of
the outdoor unit of a residential split system consisting of two units
manufactured by Carrier. Consult factory or a qualified system
engineer prior to connecting this unit to any other manufacturer's
indoor unit. Coupling units which have different control systems,
may cause irreversible damage and void the warranty protection.
The manufacturer declines any liability for system malfunction
resulting from unapproved coupling.
IMPORTANT:
During the unit installation make first refrigerant connections
and then electrical connections. If unit is uninstalled first
disconnect electrical cables, then refrigerant connections.
WARNING:
Disconnect the mains power supply switch before servicing
the system or handling any internal parts of the unit.
• The manufacturer declines any liability for damage resulting from
modifications or errors in the electrical or refrigerant connections.
• Failure to observe the installation instructions or use of the unit
under conditions other than those indicated in Table III “Operating
limits”, will immediately void the unit warranty.
• Failure to observe electric safety codes may cause a fire hazard in
case of short circuits.
• Inspect equipment for damage due to improper transportation or
handling: file an immediate claim with the shipping company.
Do not install or use damaged units.
• In case of any malfunctioning turn the unit off, disconnect the
mains power supply and contact a qualified service engineer.
• This equipment contains R-410A refrigerant, a substance that is
not depleting the ozone layer.
• All of the manufacturing and packaging materials used for
your new appliance are compatible with the environment and
can be recycled.
• Dispose of the packaging material in accordance with local
requirements.
• This equipment contains refrigerant that must be disposed of in a
proper manner. When disposing of the unit after its operational life,
remove it carefully. The unit must then be delivered to an
appropriate disposal center or to the original equipment dealer.
GB - 4
• Carefully recover refrigerant within this unit before final disposal or
when servicing. Never vent refrigerant to atmosphere.
Use approved recovery equipment for R-410A refrigerant.
Do not use R-22 equipment.
Choosing the installation site
Positions to avoid:
• Exposed to direct sun.
• Too close to sources of heat radiation, vapour or flammable gas.
• Particularly dusty areas.
Recommendations:
• Choose a position protected from opposing winds.
• Choose a position sheltered from direct sun.
• Choose an area where air outlet and unit noise will not bother
your neighbours.
• Choose a position that allows for the clearances required.
• Floor structure should be adequately strong to support unit weight
and minimize vibration transmission.
• Consider a position which will not obstruct passageways or doors.
A mm
2
B mm
Unit installation
Model
018 - 024
A
508
B
330
1 No. 4 Ø 8 mm pins.
2 Protrusion height from the
support surface max. 20 mm.
• Fix the unit with locally purchased bolts buried in the block to
prevent overturning due to strong gusts of wind.
a
b
c
a 100 mm min.
b 20 mm gradient.
c Gravel-filled trench.
• Unit must be adequately raised above floor surface.
d
e
d Drain fitting
e Vinyl pipe
• To drain the condensate water to a drain while operating in
heating mode, insert the drain fitting into the hole underneath on
the left of the base and use a vinyl pipe with a 16 mm internal
diameter. It must not be used at temperatures lower than 0°C.
(not supplied for low temperature versions).
Snow
• If the unit is installed in areas where heavy snowfalls may occur, it
is necessary to raise its level at least 200 mm above the usual
snow level or alternatively to use the outdoor unit bracket kit.
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Warnings: avoid....
ENGLISH
Disconnecting the refrigerant connections after installation:
this will cause refrigerant leaks.
Connecting the condensate drain pipe to the outdoor unit.
Excessive height difference between indoor and outdoor unit (see
Table II "Connections"). Excessive distance between indoor and
outdoor units. (see Table II "Connections").
Predominant head winds.
Unnecessary turns and bends in the connecting pipes.
Multiple unit installation with units facing each other.
Any slack in the electrical connections.
Insulating the connecting pipes only partially, which will cause dripping.
Dripping into passageways.
Flattening or kinking of refrigerant or condensate pipes.
Any obstruction of the unit air outlet and intake or any obstacle that is too
close (see minimum clearances required). Installation on grassy ground
or soft surfaces (in these cases a solid foundation must be included).
Soiling of pipe ends.
Allowing piping to get wet before connection.
GB - 5
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Refrigerant connections
No moisture.
No dust.
Charge liquid-no gas.
No leak.
No mineral oil.
Copper tubes during storage.
Neat.
1/2” UNF (R-410A)
7/16” UNF (R-22)
Use tools designed for R-410A higher pressure.
Keep inside clean.
Dry nitrogen brazing.
Min.
– 100 kPa
(– 755 mmHg)
Vacuum.
GB - 6
2-stage vacuum pump. Replace oil regularly.
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Refrigerant connections
ENGLISH
Flaring the ends of the tubing
2
1
The unit can be installed:
햲 on the floor;
햳 on the wall using the bracket kit.
Remove protective caps from copper tube ends.
Position tube end downward, cut the tube to the requested length
and remove the burrs with a reamer.
Connect tubing in accordance with the limits shown on Table II
(Connections).
Finger-tighten the fitting several turns, then tighten it with a wrench
by applying the tightening torque indicated in the table.
Do not leave system open to atmosphere any longer than minimum
required for installation.
Oil in the compressor is extremely susceptible to moisture
absorption.
Always keep ends of tubing sealed during installation.
The maximum residual quantity of oil used for tubing is 40 mg/10 m.
Where required, the unit must be charged with additional
refrigerant.
Additional charge must be added using electronic scales and
the service port (5/16”) on the suction line.
Charge refrigerant only in liquid phase (bottle turned upside
down or using the specific connection on bottle; see page 1).
Connection to unit
햴
Remove flare nuts from the unit connections and place them on the
tube end.
Flare the tube with the flaring tool.
햴 Adjustable wrench
or torque wrench
L
L
Insufficient tightening torque will cause gas leaks.
Overtightening the fittings will damage the tube flaring and
cause gas leaks.
Pipe diameter
6.35 mm (1/4”)
9.52 mm (3/8”)
12.70 mm (1/2”)
15.87 mm (5/8”)
19.05 mm (3/4”)
Flare end must not have any burrs or imperfections.
The length of the flared walls must be uniform.
Valve
Flare nut
Wrench mm
Nm
Tightening torque
Nm
18
42
55
65
100
Tightening torque
Valve cap
Pressure port cap
Wrench mm
Nm
Wrench mm
Nm
Valve needle
Wrench mm Nm
1/4”
17
18
23
20
18
16 - 18 Allen (hex.) 5
3/8”
22
42
23
20
18
1/2”
26
55
29
40
18
5/8”
29
65
29
40
3/4”
36
100
38
40
Pressure port
Wrench mm
Nm
9
–
0.34
16 - 18 Allen (hex.) 5
9
–
0.34
16 - 18 Allen (hex.) 5
13
–
0.34
18
16 - 18 Allen (hex.) 5
13
–
0.34
18
16 - 18 Allen (hex.) 5
13
–
0.34
E-7
GB
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
Refrigerant connections
f
j
e h
g
g
l
d
h
i
c
ba
c
k
g Gas line (large diameter)
h Liquid line (small diameter)
i Flare nut
j Indoor unit
k Outdoor unit
l Vacuum pump
Air purging
o
Use only a vacuum pump to purge air from the piping.
NEVER use the system compressor as a vacuum pump.
m
NEVER use the unit refrigerant gas to purge the connecting
pipes.
No additional refrigerant has been provided in the unit for this
purpose.
Remove the caps from the two and three-way valves.
Create a vacuum with a vacuum pump connected to the service
connection of the suction shut-off valve, as shown, keeping the
shut-off valves completely shut until a 50 Pa (0.5 mbar) vacuum
has been reached.
Now open the two-way valve for 3 sec., then quickly shut it to
check for possible leaks.
After the leak check, fully open the two and three-way valves.
Replace caps and check for leaks.
n
m Pipe
n Pipe insulation
o Fastening tape
Once all connections have been completed, check for leaks by
using a leak detector specific for HFC refrigerants.
Finally wrap the valves and pipes with anti-condensate insulation
and tighten this with tape, without exerting too much pressure on
the insulation.
Repair and cover any possible cracks in the insulation.
Fix the pipes to the wall with hooks or conduits.
Table III: Operating limits (1)
Cooling (2)
Outdoor temperature 43°C
Maximum conditions
Indoor temperature 32°C d.b.; 23°C w.b.
Outdoor temperature 15°C (4)
Minimum conditions
Heating (3)
Mains power supply
Notes:
1.
2.
3.
4.
GB - 8
Outdoor temperature 24°C d.b.; 18°C w.b.
Maximum conditions
Indoor temperature 27°C d.b.
Minimum conditions
Outdoor temperature –15°C d.b.; –17°C w.b.
Nominal single-phase voltage
Operating voltage limits
230V ~ 50Hz
220V-240V ~ 60Hz
min. 198V – max. 264V
Data referred to the outdoor unit only.
According to ISO 5151.2/T1.
According to ISO 5151.2/High+.
The units 38YYS018 and 38YYS024 are equipped with a
high pressure cut-out, which is suitable for outdoor
temperatures up to -15C°.
d.b. - dry bulb w.b. - wet bulb
Indoor temperature 21°C d.b.; 15°C w.b.
WARNING:
During heat pump operation unit will undergo several defrost cycles to
eliminate ice that might possibly collect on the outdoor unit in very low
ambient temperatures.
In these cycles, fan speed will automatically reduce and cannot be
varied until defrost cycle is completed.
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Electrical connections
ENGLISH
Cooling only unit
Cooling only system
쐇
230V ~ 50Hz
L N R C Y
쐋 쐏
햳
R C Y O W2 S
햲
쐃
햲
Terminal box legend
10
햲 Power supply cable (H07 RN-F)
120
Earth.
햳 Interconnection cable (A07 RN-F)
L
Live power supply.
쐃 Indoor unit
N
Neutral power supply.
R
Live connection indoor/outdoor unit.
C
Neutral connection indoor/outdoor unit.
Y
Compressor interlocking contact.
O
Reversing valve control.
쐇 Outdoor unit
10 100
쐋 Main switch
쐏 Time-delay fuse or circuit breaker
(see table IV “Electrical data”).
햳
W2 Outdoor fan signal.
Defrost end signal.
Heat pump unit
Heat pump system
쐇
L N R C Y O W2 S
L N R C Y O W2 S
L N R C Y O W2 S
햲
230V ~ 50Hz
S
쐋 쐏
R C Y O W2 S
햳
쐃
E-9
GB
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Electrical connections
• Remove electric box cover.
• Make electrical connections between units prior to proceeding
to mains supply unit connection.
• Connect the wires to the terminals according to the wiring
diagram and firmly tighten.
• Before proceeding with the unit connection to the mains supply
locate live L and neutral N, then make connections as shown
in the wiring diagram.
• Ensure that mains supply connection is made through a
switch that disconnects all poles, with contact gap of a least 3
mm.
• The mains supply connecting cable must be H07 RN-F type
(or higher), synthetic rubber insulation with neoprene coating,
according to EN 60335-2-40.
Note:
All field electrical connections are the responsibility of the
installer.
• Make refrigerant connections before electrical
connections.
When disassembling, disconnect electrical connections before
refrigerant connections.
Refer to the indoor unit installation manual for sizing the
connection wires between units.
IMPORTANT:
Make ground connection prior to any other electrical
connections.
Note:
After connections have been completed, replace electric box
cover.
Table IV: Electrical data
Power input
Starting
current
(3)
(2)
Nominal conditions
230V ~ 50Hz
ISO 5151.2/T1
indoor 27°C d.b. 19°C w.b.
outdoor 35°C d.b. 24°C w.b.
Main power
connections (6)
Heating
Cooling
Nominal conditions
Peak conditions
230V ~ 50Hz
198V ~ 50Hz
ISO 5151.2/High+
ISO 5151.2/T1
indoor 32°C d.b. 23°C w.b. indoor 20°C d.b. 15°C w.b.
outdoor 43°C d.b. 32°C w.b. outdoor 7°C d.b. 6°C w.b.
Peak conditions
198V ~ 50Hz
ISO 5151.2/High+
indoor 27°C
outdoor 24°C d.b. 18°C w.b.
Time-delay
fuse
gL type
Wire size
(4-5)
Unit
A
A
W
A
W
A
W
A
W
A
mm 2
38GL(S)018G
38GL(S)024G
40
60
9,3
10,1
2110
2300
13,1
15,5
2560
3100
–
–
–
–
–
–
–
–
20
25
2,5
2,5
38GL-028G
38GL-036G
38GL-048G
70
76
114
13,9
14,9
15,8
3030
3250
3450
18,9
19,4
28,2
3600
3700
5350
–
–
–
–
–
–
–
–
–
–
–
–
16
16
16
4
4
6
38YY(S)018G
38YY(S)024G
38YY-028G
40
60
70
8,8
11,4
13,4
1980
2465
2940
12,4
14,9
19,5
2430
2890
3800
8,9
12,2
14,1
2015
2675
2680
11,8
14,3
16,9
2300
2775
3890
20
25
30
2,5
2,5
4
38YY-036G
38YY-048G
76
114
15,7
17,7
3430
3860
19,9
28,7
4020
5450
15,9
17,5
3030
3320
20,0
25,7
3960
4900
32
40
4
6
Notes:
1.
2.
3.
4.
5.
6.
GB - 10
Unit is suitable for outdoor installation.
Data referred to the outdoor unit only.
Starting current duration is usually lower than 1 sec.
Wire size shown applies to line length up to 15 m.
If the indoor unit is provided with an electric heater, consult indoor unit installation manual for correct sizing of the wires.
The mains supply connecting cable must be H07 RN-F type (or higher), synthetic rubber insulation with Neoprene coating, according to
EN 60335-2-40 codes.
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
Pump Down and refrigerant circuit
Pump-down
Pump-down is an operation intended to collect all the system
refrigerant in the outdoor unit.
This operation must be carried out before disconnecting the
refrigerant tubing in order to avoid refrigerant loss to the
atmosphere, if it becomes necessary to disconnect the
refrigerant connections for unit repair, removal or disposal;
in this case, after removal, unit must be delivered to an
appropriate disposal centre or the original dealer.
ENGLISH
Shut off the liquid valve with the Allen wrench.
Turn the system on in cooling with fan operating at high velocity.
(Compressor will immediately start, provided 3 minutes have
elapsed since the last stop).
After 2 minutes of operation, shut the suction valve with the same
wrench.
Turn the system off and switch mains supply off.
Disconnect tubing. After disconnection, protect valves and tubing
ends from dust.
Compressor damage may occur if run at a negative suction
pressure.
Refrigerant circuit
Heat pump system
Cooling only unit
15
7 5
7 5
18
10
1
11
18
1
10
2
14
2
16
17
17
4
4
8
6
12
13
6
3
8
7
7
Cooling cycle
Legend:
햲
햳
햴
햵
햶
햷
햸
햹
햻
햽
햾
햿
헀
헁
헂
헃
헄
Outdoor coil
Compressor
Metering device
Strainer
Vapor valve
Liquid valve
Service pressure port
Additional pressure port
Indoor unit coil
Liquid distributor
Cooling metering device
Heating metering device
Additional suction accumulator
Reversing valve
Defrost end thermostat
Crankcase heater
Discharge muffler
Gas
15
7 5
11
18
1
10
2
14
16
17
4
13
6
12
8
7
Heating cycle
Liquid + Gas
Liquid
E - 11
GB
38GL...G / 38GLS...G / 38YY...G / 38YYS...G
R-410A
Unit maintenance, troubleshooting and guide for the owner
Unit maintenance
The following maintenance operations must be carried out by
qualified personnel.
Cleaning the coil
When necessary, proceed as follows for more careful cleaning of
the coil:
Switch the mains supply OFF.
Remove unit top cover by loosening holding screws and lifting
the cover.
Compressor runs continuously:
• Unit selected too small for actual air conditioning needs.
• Indoor temperature selection too low (if in cooling) or too high (if in
heating, for heat pump models); check temperature selection.
• Refrigerant charge low; check and add refrigerant.
• Condenser fan (outdoor or indoor, in case of heat pump operation)
faulty; replace.
• Air or other non condensable gases in the circuit; drain refrigerant
(see note 1), evacuate and recharge.
• Obstructions at air intake or dirty indoor unit filters; remove
obstruction or clean filter.
Frequent ice build-up on outdoor coil (during heating with
heat pump units):
• Outdoor fan stopped; check cause and repair.
• Wrong electrical connections between indoor and outdoor units;
check electrical connections and repair.
• Check defrost end thermostat positioning and connection.
Discharge pressure too high:
• Outdoor coil dirty or obstructed; clean or remove obstructions.
• Condenser fan (outdoor or indoor, in case of heat pump operation)
faulty; replace.
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Air or other non-condensable gases in the circuit; drain refrigerant
(see note 1), evacuate and recharge.
Discharge pressure too low:
• Refrigerant charge too low; add refrigerant.
• Outdoor coil dirty or obstructed; clean or remove obstructions.
• Indoor unit air filter dirty; clean filter.
Carefully clean the coil with a vacuum cleaner from inside to outside.
With the same vacuum cleaner, dust the inside of the fan
compartment and the fan blades. Avoid any damage to the blades
which may cause future vibrations and noise.
Replace the unit cover and tighten the screws.
After long shutdown periods and at commissioning
(for heat pump models only)
Energize the system by putting the main switch to ON without
starting the unit. (Remote control must be in the OFF position).
Do not disconnect the main switch during the unit operating season.
Troubleshooting
Compressor and fan of the outdoor unit will not start:
• Unit not energized; check the mains power connections.
• Main switch OFF; check and put to the ON position.
• Main switch fuses have blown; replace.
• Wait for 3 minutes; compressor cycling protection is on.
• Pressure switch open; check and eliminate cause.
• Mains voltage too low.
• Electrical connections loose or wrong; check and repair.
Compressor will not start, but outdoor fan is running:
• Electrical connections of compressor loose or wrong; check and repair.
• Compressor burnt out, seized or protection device on; check for
the cause and replace compressor if necessary.
• Run capacitor faulty (single-phase models); replace.
Compressor starts, but stops due to its overtemperature
protection (other than stops caused by the normal operation
of the thermostat):
• Wrong refrigerant charge (excessive or low) or air or other non
condensable gases in the circuit; drain refrigerant (see note 1),
evacuate and recharge.
• Mains voltage wrong (too high or too low).
• Condenser coil (outdoor or indoor, in case of heat pump
operation) obstructed; remove obstructions.
• Outdoor fan off; check cause and repair.
• Run capacitor faulty; check and replace.
• Refrigerant circuit clogged; check and remove obstructions.
• Reversing valve faulty on heat pump models; replace.
• Expansion device clogged or covered with ice; drain refrigerant
(see note 1), evacuate and recharge.
GB - 12
Suction pressure too high:
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Reversing valve faulty or internal leak; replace.
Suction pressure too low:
• Refrigerant charge too low; add refrigerant.
• Evaporator coil (indoor or outdoor, in case of heat pump
models),covered with ice; see the following points.
• Air circulation on the evaporator unit (indoor or outdoor, in case of
heat pump models) not sufficient; check for the cause and repair.
• Expansion device or suction line clogged: check and repair.
• Outdoor fan does not stop during defrost periods (when heating
with heat pump models); check electrical connections.
Outdoor fan cycling due to its overtemperature protection:
• Fan capacitor faulty; replace.
• Electrical connection loose; check connections.
• Fan bearing seized; check and repair.
Outdoor fan motor running always at low speed:
• Wiring not connected to the board; check connections between
temperature sensor and board.
• Temperature sensor is fault; replace the sensor.
• Electronic board broken; replace board.
Outdoor fan motor running always at high speed:
• Temperature sensor is short circuited; replace temperature
sensor.
• Electronic board broken; replace board.
Note 1: Do not release refrigerant to the atmosphere;
use refrigerant recovery equipment.
Guide for the owner
When installation and tests are completed explain the Operation
and Maintenance Manual to the owner, with particular attention to
the main operating modes of the air conditioner, such as:
• Turning the unit on and off.
• Functions of the remote control.
• Removal and cleaning of the air filters.
Leave the two installation manuals for the indoor and outdoor units
with the owner for future use during maintenance operations or for
any other needs.
L010125H84 - 0303
Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1
The manufacturer reserves the right to change any product specifications without notice.
Order No. 13881-74M10, March 2003 . Supersedes Order No. 13881-74M10, October 2002
Printed in Italy