Carrier Puron 38GLS-07G-703EC-40 User manual

38GLS…G / 38YL-…G
001
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INSTALLATION MANUAL

38GLS…G / 38YL-…G Puron
Cooling only and heat pump split system outdoor units
ENGLIS
GB - 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
Dimensions and weight ................................................................................................................. 2
Max. power input ........................................................................................................................... 2
Minimum clearances...................................................................................................................... 3
Connections................................................................................................................................... 3
General information.......................................................................................................................
Warnings: avoid ............................................................................................................................. 5
Refrigerant connections ................................................................................................................ 6/7
Operating limits.............................................................................................................................. 7
Electrical connections.................................................................................................................... 8/9
Electrical data ................................................................................................................................ 9
Pump down and check the refrigerant charge............................................................................... 10/11
Unit maintenance........................................................................................................................... 11
Troubleshooting and guide for the owner ...................................................................................... 12
Accessories ................................................................................................................................... 13
IMQ certification............................................................................................................................. 13
Supplement instructions................................................................................................................ 1 /17
ATTENTION INSTALLERS AND SERVICE TEC NICIANS!
AIR CONDITIONER WIT R-410A–QUICK REFERENCE GUIDE
•R- 10A refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing
equipment and replacement components are designed to operate with R- 10A.
•R- 10A refrigerant cylinders are pink.
• R- 10A refrigerant cylinders have a dip tube which allows liquid to flow out of cylinder in an upright position.
•R- 10A 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- 10A, as other HFCs, is only compatible with oils selected by the compressor manufacturer.
•A vacuum pump is not enough to remove moisture from oil.
•POE 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- 10A into the atmosphere.
•Use only Carrier matching indoor units (Table I).
Table I
Cooling only models eat pump models i-Wall New Cassette Console New Satellite
i-Wall Console
38GLS-07G--703EC-40 — 42 WS007 42 WV007 — — — —
38GLS-09G--703EC-40 — 42 WS009 42 WV009 — — 42VKG009 40JX009
38GLS-12G--703EC-40 — 42 WS012 42 WV012 40GKX012 42VKX012 42VKG012 40JX012
38GLS-18G--703EC-40 — 42 WS018 42 WV018 40GKX018 42VKX018 42VKG018 40JX018
38GLS-24G--703EC-40 — 42 WS024 42 WV024 40GKX024 42VKX024 42VKG024 40JX024
—38YL--07G--703EJ-40 42 WS007 42 QV007 — — — —
—38YL--09G--703EJ-40 42 WS009 42 QV009 — — 42VKG009 40JX009
—38YL--12G--703EJ-40 42 WS012 42 QV012 40GKX012 42VKX012 42VKG012 40JX012
—38YL--18G--703EJ-40 42 WS018 42 QV018 40GKX018 42VKX018 42VKG018 40JX018
—38YL--24G--703EJ-40 42 WS024 42 QV024 40GKX024 42VKX024 42VKG024 40JX024
Power supply: 230V ~ 50 z
Unit size Oil type Quantity Drier already installed on
cc liquid line of the unit
07 PVE 380 NOT NECESSARY
09 PVE 500 NOT NECESSARY
12 HAB 620 NOT NECESSARY
18 - 2 POE 1120 YES

38GLS…G / 38YL-…G Puron
GB - 2
Dimensions and weight
Mod. 38GL 07G - 09G - 12G
Mod. 38YL 07G Mod. 38GL 18G - 2 G
Mod. 38YL 18G
Mod. 38YL 09G -12G
EEDEEDEED
B
A
B
CF
Ø 8,5
CF
Ø 8,5
CF
Ø 8,5
A
A
B
EED
A
B
CF
Ø 8,5
Mod. 38 GL...G 38 YL...G
07 09 12 18 24 07 09 12 18 24
Amm 660 660 660 800 800 660 660 660 800 800
Bmm 50 50 50 590 590 50 590 590 590 803
Cmm 220 220 220 300 300 220 220 220 300 300
Dmm 390 390 390 508 508 390 390 390 508 508
Emm 135 135 135 1 6 1 6 135 135 135 1 6 1 6
Fmm 250 250 250 330 330 250 250 250 330 330
kg 26.5 28 32 5 51 27 32 3 6 52
3
1
2
햲Outdoor unit
햳Indoor unit
햴Height
Connections Model
07 - 09 12 18 24
Max. height difference 5 m 5 m 10 m 15 m
Max. pipe length 15 m 15 m 30 m 0 m
Minimum nom. thickness
Pipe diameter Minimum nominal
inches - mm thickness (mm)
1/4" - 6.35 0.80
3/8" - 9.52 0.80
1/2" - 12.77 0.80
Table II: Connections
3
1
2
07 9.52 6.35 3/8" 1/ "
09
12 12.77 6.35 1/2" 1/ "
18
24 12.77 6.35 1/2" 1/ "
Pipe diameter
Gas Liquid
(Suction) (Liquid)
mm
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
200 kPa and with a
burst pressure of
20700 kPa.
Under no circumstances
must sanitary type
copper pipe be used.
Model Pipe diameter
Gas Liquid
(Suction) (Liquid)
inches
Mod. 38YL 2 G

GB - 3
38GLS…G / 38YL-…G Puron
ENGLISH
B
A
C
D
E
Minimum clearances
System charge
Size Nameplate Suitable up to Extra charge Extra charge (g) with indoor unit
m g/m 42VKX 40JX
Cooling only 07 520 6 15 – –
Cooling only 09 5 5 6 15 – 50
Cooling only 12 565 8 15 – –
Cooling only 18 1090 8 15 – –
Cooling only 2 1265 8 15 220 150
eat pump 07 610 6 15 – –
eat pump 09 725 6 15 – –
eat pump 12 705 8 15 – 50
eat pump 18 1530 8 15 – –
eat pump 2 1900 8 30 220 150
Mod. 07 09 12 18 24
Amm 50 50 50 50 100
Bmm 100 100 250 250 250
Cmm 00 00 00 500 500
Dmm 50 50 50 50 50
Emm 670 670 670 70 70
Fmm 00 00 00 00 00

GB -
38GLS…G / 38YL-…G Puron
appropriate disposal center or to the original equipment dealer.
• Carefully recover refrigerant within this unit before final disposal or
when servicing. Never vent refrigerant to atmosphere.
Use approved recovery equipment for R- 10A 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.
• Fix the unit with locally purchased bolts buried in the block to
prevent overturning due to strong gusts of wind.
• For heat pump models, unit must be adequately raised above
floor surface.
• 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).
• 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.
General information
Unit installation
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 electro-
magnetic compatibility (EEC/89/336) directives.
• For trouble-free installation, it should 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 200 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: the unit is
suitable for outdoor installation.
• 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- 10A 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
A mm
B
mm

No. Ø 8 mm pins.
Protrusion height from the
support surface max. 20 mm.
Model AB
07-09-12 390 250
18-2 508 330
Snow
햵Drain fitting
햶Vinyl pipe
햶
햵
햲100 mm min.
햳20 mm gradient.
햴Gravel-filled trench.
햲
햳
햴

GB - 5
38GLS…G / 38YL-…G Puron
ENGLISH
Excessive height difference between indoor and outdoor unit (see
Table II "Connections"). Excessive distance between indoor and
outdoor units. (see Table II "Connections").
Unnecessary turns and bends in the connecting pipes.
Any slack in the electrical connections.
Flattening or kinking of refrigerant or condensate pipes.
Soiling of pipe ends.
Allowing piping to get wet before connection.
Disconnecting the refrigerant connections after installation:
this will cause refrigerant leaks.
Connecting the condensate drain pipe to the outdoor unit.
Predominant head winds.
Multiple unit installation with units facing each other.
Insulating the connecting pipes only partially, which will cause dripping.
Dripping into passageways.
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).
Warnings: avoid....

38GLS…G / 38YL-…G Puron
GB - 6
The unit can be installed:
햲 on the floor;
햳 on the wall using the bracket kit.
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.
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
Insufficient tightening torque will cause gas leaks.
Overtightening the fittings will damage the tube flaring and
cause gas leaks.
Pipe diameter Tightening torque
Nm
6.35 mm (1/ ”) 18
9.52 mm (3/8”) 2
12.77 mm (1/2”) 55
Flaring the ends of the tubing
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.
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 0 mg/10 m.
Remove flare nuts from the unit connections and place them on the
tube end.
Flare the tube with the flaring tool.
Flare end must not have any burrs or imperfections.
The length of the flared walls must be uniform.
Refrigerant connections
1
2
햴Adjustable wrench
or torque wrench
햴
L
L
Tightening torque
Valve Flare nut Valve cap Pressure port cap Valve needle Pressure port
Wrench mm Nm Wrench mm Nm Wrench mm Nm Wrench mm Nm Wrench mm Nm
1/ ” 17 18 23 20 18 16 - 18 Allen (hex.) 5 9 – 0.3
3/8” 22 2 23 20 18 16 - 18 Allen (hex.) 5 9 – 0.3
1/2” 26 55 29 0 18 16 - 18 Allen (hex.) 5 13 – 0.3

38GLS…G / 38YL-…G Puron
GB - 7
ENGLISH
햹Gas line (large diameter)
햺Liquid line (small diameter)
햻Flare nut
햽Indoor unit
햾Outdoor unit
햿Vacuum pump
햳Three-way valve
햴Needle valve
햵Valve cap
햶Valve needle
햷Two-way valve
햸Allen (hex. head) wrench
Refrigerant connections
헀Pipe
헁Pipe insulation
헂Fastening tape
Air purging
Use only a vacuum pump to purge air from the piping.
NEVER use the system compressor as a vacuum pump.
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.
헀
헁
헂
Cooling (2) Maximum conditions outdoor temperature 3°C
indoor temperature 32°C d.b.; 23°C w.b.
Minimum conditions outdoor temperature 15°C ( )
indoor temperature 21°C d.b.; 15°C w.b.
eating (3) Maximum conditions outdoor temperature 2 °C d.b.; 18°C w.b.
indoor temperature 27°C d.b.
Minimum conditions outdoor temperature –15°C d.b.; –17°C w.b.
Mains power supply Nominal single-phase voltage 230V ~ 50Hz
Operating voltage limits min. 198V – max. 264V
Table III: Operating limits (1)
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.
Notes: 1. Data referred to the outdoor unit only.
2. According to ISO 5151.2/T1.
3. According to ISO 5151.2/High+.
. 38GLS units are provided with head pressure control
suitable up to –15°C ambient temperature (size 07 and 09
up to –5°C).
d.b. - dry bulb w.b. - wet bulb
햿
햽
햾
햺
햹
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.

38GLS…G / 38YL-…G Puron
GB - 8
Electrical connections
eat pump unit eat pump system
Cooling only unit Cooling only system
햲Connecting cable, indoor-outdoor units
(field wiring).
햳Mains supply connecting cable
(field wiring).
쐃Indoor unit
쐇Outdoor unit
쐋Main switch
쐏Time-delay fuse or circuit breaker
(see table V "Electrical data").
햲
햳
햲
햳
IMPORTANT: use a separate bipolar wire to connect S1 and S2 terminals.
Terminal box legend, all models
Earth.
LLive power supply.
NNeutral power supply.
RLive connection indoor/outdoor unit.
CNeutral connection indoor/outdoor unit.
YCompressor interlocking contact.
OReversing valve control (Heat pump only).
W2 Outdoor fan signal (Heat pump only).
S1 Outdoor coil sensor (Heat pump only).
S2 Outdoor coil sensor (Heat pump only).

GB - 9
38GLS…G / 38YL-…G Puron
ENGLISH
In some cases the system connection to the power supply can
be made to the indoor unit.
Check in the indoor unit installation manual if this is possible.
Remove electric box cover.
Connect the wires to the terminals according to the wiring
diagram and firmly tighten.
IMPORTANT:
Make ground connection prior to any other electrical
connections.
Electrical connections
• Make refrigerant connections before electrical
connections. When disconnecting, disconnect electrical
connections before refrigerant connections.
• Make electrical connections between units prior to proceeding
to mains supply unit connection.
• 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- 0 and HD277.S1 codes.
Note:
All field electrical connections are the responsibility of the
installer.
Refer to the indoor unit installation manual for sizing the
connection wires between units.
Note:
After connections have been completed, replace electric box cover.
Notes: 1. Unit is suitable for outdoor installation.
2. Starting current duration is usually lower than 1 sec.
3. Wire size shown applies to line length up to 15 m.
4. If the indoor unit is provided with an electric heater, consult indoor unit installation manual for correct sizing of the wires.
5. Data referred to the outdoor unit only.
6. The mains supply connecting cable must be H07 RN-F type (or higher), synthetic rubber insulation with Neoprene coating, according to
EN 60335-2- 0 and HD277.S1 codes.
Table IV: Electrical data
Cooling only A AW AWAWAW A mm2
38GL 07G 20 3.3 750 .8 9 0 --- --- --- --- 10 1.5
38GL 09G 25 .5 1000 6.5 1250 --- --- --- --- 12 2.5
38GL 12G 30 5.6 1230 8.0 1555 --- --- --- --- 16 2.5
38GL 18G 0 9.3 2110 13.1 2560 --- --- --- --- 20 2.5
38GL 24G 60 10.1 2300 15.5 3100 --- --- --- --- 25 2.5
eat pump A AW AWAWAW A mm2
38YL 07G 20 3.8 870 5. 10 5 3.5 815 .1 800 10 1.5
38YL 09G 25 .7 10 0 6.5 1270 .0 890 .5 1070 12 2.5
38YL 12G 30 6.0 1360 8.5 1700 5.0 11 0 6.5 1300 16 2.5
38YL 18G 0 8.8 1980 12. 2 30 8.9 2015 11.8 2300 20 2.5
38YL 24G 60 11. 2 65 1 .9 2890 12.2 2675 1 .3 2775 25 2.5
Starting
current
(2)
Heating
Cooling Power input (5) Main power
connections (6)
Time-delay
fuse
gL type Wire size
(3- )
Nominal conditions
230V ~ 50Hz
ISO 5151.2/T1
indoor 27°C d.b. 19°C w.b.
outdoor 35°C d.b. 2 °C w.b.
Peak conditions
198V ~ 50Hz
ISO 5151.2/T1
indoor 32°C d.b. 23°C w.b.
outdoor 3°C d.b. 32°C w.b.
Nominal conditions
230V ~ 50Hz
ISO 5151.2/High+
indoor 20°C d.b. 15°C w.b.
outdoor 7°C d.b. 6°C w.b.
Peak conditions
198V ~ 50Hz
ISO 5151.2/High+
indoor 27°C
outdoor 2 °C d.b. 18°C w.b.

38GLS…G / 38YL-…G Puron
GB - 10
Pump Down and check the refrigerant charge
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.
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.
Connect a gauge on low side during a condenser pump-down.
Compressor damage may occur if run at a negative suction
pressure.
Check the refrigerant charge
• This check becomes necessary after any refrigerant leak due to
incorrect connection, or after replacement of the compressor.
• The best method to correctly charge refrigerant is to completely
empty the refrigerant circuit using refrigerant recovery equipment.
Then charge the exact quantity of refrigerant according to the data
shown on the unit nameplate. This can be done with charging
equipment of the “Dial a charge” type.
15
10
5
2
22
20
18
16
1
12
➀➂
➁
20 25 30 35 40
햲 Superheat °C
햳 Condenser entering dry bulb temperature °C
햴 Evaporator entering wet bulb temperature °C
•R-410A refrigerant cylinders contain a dip tube which allows
liquid refrigerant to flow from the cylinder in an upright
position.
Charge R-410A units with cylinder in upright position and a
commercial-type metering device in manifold hose in order to
vaporize the liquid refrigerant before it enters in the unit.
Charge refrigerant into suction-line.
• The above method must be used for heat pump systems
operating in heating, as operating difficulty in the winter season
(iced outdoor coil) impedes stable operating conditions. Hence the
refrigerant charge must be checked. In cooling only systems, or
heat pumps operating in the cooling mode, the refrigerant charge
check can be carried out using the superheating method; this is
only possible, if the ambient temperature is above 15°C.
•Superheating method
Check temperature at the points shown in the illustration:
- Te (evaporating temp.) with manometer
- Ta (suction gas temp.) contact thermometer superheat (Ta - Te)
should equal the table value ± 2ºC.
If superheat is outside the indicated limits, proceed as follows:
• If superheat is lower than the table value, the refrigerant charge is
excessive or the air quantity passing through the evaporator
(indoor unit) coil is insufficient. If superheat is higher than the table
value, the refrigerant charge is insufficient or the metering device
(expansion valve or capillary) is clogged.
• By knowing the temperature of the air entering the condenser coil
it is possible to determine the correct value of the superheat, we
should have at the compressor inlet. Wait approx. 5 minutes after
adding or removing refrigerant; if the room conditions or those of
the air entering the condenser vary during the charging operation,
repeat all readings.

GB - 11
38GLS…G / 38YL-…G Puron
ENGLISH
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.
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.
Check the refrigerant charge and unit maintenance
Refrigerant charge control eat pump unit
Cooling only unit
Cooling cycle
eating cycle
Gas
Liquid + Gas
Liquid
Te Ta
2
4
5
6
7
7
8
10
3
1
17
18
Te Ta
2
11
6
14
16
18 10
15
12
4
7
5
7
17
8
13
Ti
2
11
6
14
16
18 10
15
12
4
7
5
7
17
8
13
1
Legend:
햲Outdoor coil
햳Compressor
햴Metering device
햵Strainer
햶Vapor valve
햷Liquid valve
햸Service pressure port
햹Additional pressure port
햻Indoor unit coil
햽Liquid distributor
햾Cooling metering device
햿Heating metering device
헀Additional suction accumulator
헁Reversing valve
헂Outdoor coil sensor
헃Crankcase heater
헄Discharge muffler

38GLS…G / 38YL-…G Puron
GB - 12
Troubleshooting and guide for the owner
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.
• Wrong indoor unit thermostat; 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.
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.
• Outdoor unit fan 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 on defrost circuit; check electrical
connections and repair.
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.
Suction pressure too high:
• Internal high pressure relief valve open; check for cause and repair.
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Reversing valve (on heat pump models) 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.
• Defrost thermostat faulty (heating with heat pump models); replace.
• Contact between tube and defrost thermostat (heating with heat
pump models) faulty; check and repair.
• Relay or defrost timer faulty; replace.
Outdoor fan cycling due to its overtemperature protection:
• Fan capacitor faulty; replace.
• Electrical connection loose; check connections.
• Fan bearing seized; check and repair.
• Expansion device clogged or covered with ice; drain refrigerant
(see note 1), evacuate and recharge.
• Defrost relay open (heating with heat pump models); replace.
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.

GB - 13
38GLS…G / 38YL-…G Puron
ENGLISH
IMQ certification
Your air conditioning system has been awarded IMQ certification.
The certification of the institute is only valid for systems consisting of the indoor and outdoor models listed below.
Cooling Only Models
Outdoor unit Indoor unit
38GLS-07G---703EC-40 42 WS007---703IJ-40 i Wall
38GLS-09G---703EC-40 42 WS009---703IJ-40 i Wall
42 WS012---703IJ-40 i Wall
38GLS-12G---703EC-40 40GKX012---703IJ-40 Cassette
42VKX012---703IJ-40 Console
42 WX018---703IN-40 i Wall
38GLS-18G---703EC-40 40GKX018---703IJ-40 Cassette
42VKX018---703IJ-40 Console
38GLS-24G---703EC-40 42 WX024---703IN-40 i Wall
40GKX024---703IJ-40 Cassette
42VKX024---703IJ-40 Console
eat Pump Models
Outdoor unit Indoor unit
38YL--09G---703EJ-40 42 WS09G--703IJ-40 i Wall
Accessories and IMQ certification
Table V: Accessoires
Description Part number 38GLS…G 38YL-…G
07 09 12 18 24 07 09 12 18 24
Wall bracket kit 38YL-900---002- 0 앬앬앬 앬 앬앬
38YL-900---001- 0 앬앬 앬
PTC starting kit 38YL-900---010- 0 앬앬앬 앬 앬앬
Drain pan electric heater kit (1) 38YL-900---020- 0 앬앬앬
Drain pan electric heater kit (1) 38YL-900---021- 0 앬
Drain pan electric heater kit (1) 38YL-900---027- 0 앬
NOTE (1):Mandatory for installation in climates where outdoor temperature may be below 0° C.

GB - 1
Installation instructions supplement
38GLS…G units are designed to work in North European
climates.
These versions are identified on the 5th digit, "S" of their
code number.
R- 10A versions are identified on the 8th digit “G” of their
code number.
They differ from the standard ones for the following factory
fitted accessories: head pressure controller pressure sensor
(HPC) and loss of refrigerant pressure switch (LRPS).
Operating range
Ambient temperature:
min. –5°C max. + 3°C (mod. 007, 009)
min. –15°C max. + 3°C (mod. 012, 018, 02 )
Power supply
Nominal single-phase voltage: 230V ~ 50Hz
Operating voltage limits min. 198V
max. 264V
Features
– PC and IP Remote Manual Reset.
Low ambient head pressure controller (HPC)
pressure sensor type for monosplit is composed by:
Dual speed fan motor, pressure sensor and interface
relay.
The head pressure controller allows operation in
cooling mode up to –5°C (mod. 007, 009) and –10°C
(mod. 012, 018, 02 ) ambient temperature keeping the
condensing temperature always above 1°C - 2°C.
The “HPC” automatically feels the possible heating
mode working, allowing in this case the outdoor unit
fan motor to operate at full speed (high).
– LRPS Loss of refrigerant pressure switch: brazed between
outdoor coil and expansion device. When unit is
working, the pressure “high side” drops below 3 5kPa
(3. 5 bar; 50 psig) for refrigerant losses, the
compressor cannot restart.
Set point
– open at 3 5 kPa (3. 5 bar; 50 psig) pressure
– close at 650 kPa (6.5 bar; 95 psig) pressure
햲 Head pressure sensor
햳 High pressure cut-out (07 to 12)
햴 Loss of refrigerant pressure switch (“S” units only)
햵 Anti freeze thermostat
햶 Pressure service port
햷 High pressure cut-out (18 and 2 )
햸 Dual speed fan motor (“S” units only)
Indoor unit
Outdoor unit Cooling only
38GLS...G

GB - 15
ENGLISH
Installation instructions supplement
ead pressure controller and IP remote
manual reset
Configuration
The head pressure control “HPC” is made of three parts:
• Dual speed fan motor.
• Interface relay.
• Pressure sensor, complete with 500 mm wiring.
The high pressure switch “HIP” has been selected at automatic reset.
If “HIP” trips, cycle the power supply OFF and ON to reset the system,
because the electrical box is equipped with relays that prevent the
unit from starting, until the indoor control is switched OFF.
When head pressure drops below 3000 kPa (30 bar; 20 psig) it is
possible to restart the unit switching the indoor control ON.
Operations mode
igh speed:
If the condensing pressure is above the high pressure limit, the fan
operates at high speed.
Low speed:
If the condensing pressure is below the low pressure limit, the fan
operates at low speed.
ard start:
At each compressor starting the fan motor high speed is reached by
the pressure sensor operation.
ead pressure controller: wiring diagram
Pressure setting
High speed pressure set at 2323 kPa (23.2 bar; 337 psig).
Low speed pressure set at 1896 kPa (18.9 bar; 275 psig).
Troubleshooting
See paragraph “Troubleshooting”.
Note:
At start-up or in case of re-start after a pause of several hours
at – 10°C, with low voltage supply (198V) high pressure switch
HIP may trip off the unit. In this case, the remote reset by indoor
control (infrared) can be done for unit restarting.
FM FC
Live power supply
Neutral power supply
Pressure sensor
Interface relay
Dual speed fan motor
FM = Fan motor
FC = Fan capacitor
38GLS...G

GB - 16
Installation instructions supplement
38YLS…G units are designed to work in North European
climates.
These versions are identified on the 5th digit, "S" of their
code number.
R- 10A versions are identified on the 8th digit “G” of their
code number.
They differ from the standard ones for the following factory
fitted accessoiries: head pressure controller temperature
sensor (HPC) and loss of refrigerant pressure switch
(LRPS).
Operating range
Minimum ambient temperature: –15°C
Power supply
Nominal single-phase voltage: 230V ~ 50Hz
Operating voltage limits min. 198V
max. 264V
Features
– PC and IP Remote Manual Reset
Low ambient head pressure controller (HPC)
temperature sensor type for monosplit.
Printed circuit board (PCB), bare with insulation
coating, quick connection terminals, Heat Pump
select terminal.
The head pressure controller allows operation in
cooling mode up to –15°C ambient temperature
keeping the condensing temperature always above
1°C - 2°C.
The “HPC” automatically feels the possible heating
mode working, allowing in this case the outdoor unit
fan motor to operate at full speed.
– LRPS Loss of refrigerant pressure switch: brazed between
outdoor coil and expansion device when with unit is
working, the pressure “high side” drops below 3 5kPa
(3. 5 bar; 50 psig) for refrigerant losses, the
compressor cannot restart.
Set point
– open at 3 5 kPa (3. 5 bar; 50 psig) pressure
– close at 650 kPa (6.5 bar; 95 psig) pressure
햲 Temperature sensor
햳 High pressure cut-out
햴 Loss of refrigerant pressure switch
햵 Anti freeze thermostat
햶 Crankcase heater
햷 Pressure service port
Indoor unit
eat pump
38YLS...G
Outdoor unit

GB - 17
ENGLISH
Installation instructions supplement
ead pressure controller and IP remote
manual reset
Configuration
The head pressure control “HPC” is made of two parts:
• Printed circuit board, with electronic components and quick
connector terminals.
• Temperature sensor, complete with 500 mm wiring.
The high pressure switch “HIP” has been selected at automatic reset.
If “HIP” trips, cycle the power supply OFF and ON to reset the system,
because the electrical box is equipped with relays that prevent the
unit from starting, until the indoor control is switched OFF.
When head pressure drops below 3000 kPa (30 bar; 20 psig) it is
possible to restart the unit switching the indoor control ON.
Operations mode
Full voltage:
If the liquid line temperature is above the setpoint value plus half
the proportional band (factory set by supplier), the output voltage to
the motor is 97% or more of supply voltage.
Low voltage:
If the liquid line temperature is below set point minus half the
proportional band, the output voltage to the motor is fixed to 125V.
ard start:
At each compressor starting the full voltage output to the fan motor
is provided for 3 seconds.
Proportional band:
The controller directly senses the changes in liquid line temperature
and varies the output voltage which causes the fan motor speed
increase or decrease.
Sensor
ead pressure controller: wiring from temperature sensor to printed circuit board
Temperature setting
Proportional band set point +11 / –11°C
Minimum speed output voltage: 125 V
Setting: the head pressure controller is
supplied factory set at 2°C
Hard start time 3 seconds.
Troubleshooting
See paragraph “Troubleshooting”.
Note:
At start-up or in case of re-start after a pause of several hours
at – 15°C, with low voltage supply (198V) high pressure switch
HIP may trip off the unit. In this case, the remote reset by indoor
control (infrared) can be done for unit restarting.
Sensor
Sensor
38YLS...G

L010124H11 - 0201
Via R. Sanzio, 9 - 20058 Villa anta (MI) Italy - Tel. [phone]
The manufacturer reserves the right to change any product specifications without notice.
Order No. 13895-7 M10, February 2001. Supersedes Order No. 13895-7 M10, July 2000. Printed in Italy