Astral Pool BDP Series User manual

HEAT PUMP
BDP
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BDP SERIES
Contents
1. BDP HEAT PUMP DESCRIPTION.................................................................................................. 3
1.1. - INTRODUCTION. ..................................................................................................................... 3
1.2. - COMPONENTS ........................................................................................................................ 6
1.2.1 - CASING............................................................................................................................... 6
1.2.2 –FILTERS SECCTION............................................................................................................ 6
1.2.3 –COILS SECCTION............................................................................................................... 6
1.2.4 –VENTILATION SECTION. .................................................................................................. 7
1.2.5 –COOLING CIRCUIT............................................................................................................ 7
1.2.6 –HYDRAULIC CIRCUIT ........................................................................................................ 7
1.2.7 - OPTIONS ............................................................................................................................ 8
1.2.8 –CONTROL SECTION.......................................................................................................... 9
2.1- INSTALLATION......................................................................................................................... 11
2.1.1. –MACHINE INSTALLATION............................................................................................. 11
2.1.2. - PROPERLY MACHINE LOCATION................................................................................. 11
2.1.3.- WATER CAPACITY HYDRAULIC CIRCUIT...................................................................... 12
2.1.4. - WATER TREATMENT ...................................................................................................... 12
2.1.5–ELECTRICAL CONNECTIONS .......................................................................................... 12
2.2. –SET UP .................................................................................................................................... 12
2.2.1. –GOODS RECEPTION....................................................................................................... 12
2.2.2. –DEVICE EMPLACEMENT ................................................................................................ 13
2.2.3. –STARTING THE MACHINE............................................................................................. 15
2.2.4. –PERFORMANCE FAULTS................................................................................................ 15
2.2.5. - REGULATION ELEMENTS............................................................................................... 20
2.3. - PREVENTIVE MAINTENANCE............................................................................................... 21
ANNEX A-TECHNICAL FEATURES & COOLING CIRCUIT ............................................................... 23
ANNEX B- OPTIONAL HYDRAULIC CIRCUIT .................................................................................. 26
ANNEX C-MAIN DIMENSIONS.......................................................................................................... 28
ANNEX D-ELECTRIC DIAGRAM (CONTROL).................................................................................... 29
ANNEX E-ELECTRIC DIAGRAM (POWER) ......................................................................................... 30
ANNEX F-TERMINAL DIAGRAM........................................................................................................ 31
ANNEX G-PLUGS................................................................................................................................. 32
ANNEX H-WARRANTY CERTIFICATE ................................................................................................ 33
ANNEX I-DECLARATION OF CONFORMITY CE............................................................................... 34

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1. BDP HEAT PUMP DESCRIPTION
1.1. - INTRODUCTION.
Due to natural evaporation, the pool loses steam continuously to environment. For example, a
pool of 32 m2evaporates an average of 110 litres a day (27º C water), with people occupation in the
pool this evaporation increases.
In this way, quickly forming a wet environment in excess and it has the following effects:
1. –Quick deterioration of conventional materials.
2. - Unpleasant and unhealthy environment, favouring the growth of mildew and
microorganisms.
Optimal Thermo-hygrometric conditions for these sites considered for materials and people are:
Air (between 28º C - 30º C)
65% R.H
Water 2ºC (below air)
Indoor Air Máximum Temperature = 36ºC
Indoor pools used a considerable amount of thermal energy, much of which was lost, because
the heated wet air is continuously removed from the building and is replaced by hot, dry air.
BDP heat recovery system is designed to almost completely eliminate this type of loss.
This device must not be used by persons (including children) with reduced physical, sensory or
mental capabilities, or lacking inexperienced or knowledge, unless they have been supervised or
instructed about the use of the device by someone responsible for their safety. Children should
be supervised to ensure they do not play with the device.
If the electrical inlet wire is damaged it must be replaced by the manufacturer, the after-sales
service or by qualified persons to avoid possible damage.
A HEAT RECOVERY SYSTEM REDUCES OPERATING COSTS.
On air cooling, the hot wet air is removed from the pool room below the dew point of cold
battery (EVAPORATOR) the air is dehumidified and dried in a hot coil (CONDENSER).
During the dehumidification process heat is recovered and reused to increase the temperature
of the room air pool, and the pool water.
This system can recover 100% of the energy expended to dehumidify.
Electrical power consumption to operate the system is less than the recovered thermal energy.
Generally for each kW of electrical power, would recover 3-4 KW of thermal energy.
In winter and cold season, the return air, even after being cooled and dehumidified, will have
higher heat content than the air outside. During this period, most part of the return air would be
heated with a small amount of outside air and returned to the pool room.

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In summer and periods of milder temperatures, the outside air will sometimes higher heat
content than the return air dehumidified. During this period, the return air would be expelled and only
outside air would be supplied, properly dehumidified and heated (or the most appropriate mix in
Mixture Chamber) to the pool room.
The total effect of recovery returned air thermal energy while it´s drying, with air recirculation
dehumidified, is to provide a drastic reduction in power consumption and therefore operating costs.
QUIMICO TRATAMIENTO
BOMBA
VASO DE PISCINA
Tubo de cobre
Electrovalvula
carga
Obus de
Botella de liquido
Antirretorno
seguridad
Válvula de
liquido
Válvula de
Expansión
Válvula de liquido
Visor de Filtro
deshidratador
Evaporadora
Condensador
Titanio
Compresor
Condensador
Bateria Bateria
Salida agua piscina
Entrada agua caldera Salida agua caldera
de placas
Intercambiador
Entrada agua piscina
AB
B A
FS
TT
3 vias Valv.
Agua caliente
Bateria
Salida agua caldera
Entrada agua caldera
AB
B A
Valv. 3 vias
FS

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HEAT PUMP BDP
THE SOLUTION FOR HEATING AND AIR CONDITIONING IN THE POOL
The BDP heat pump (dehumidifier unit), is used for dehumidification of indoor pools
environment, using the latent heat of vaporization and the own performance of the equipment, to heat
pool water and air from the pool room.
Installations require systems that heat the water and air. Our equipment carry an air reheat
battery and / or support exchanger for heating water, both powered by hot water from a heat source.
(Optionally both air reheat exchangers can be electric).
Otherwise, outdoor air module can optionally also include when temperature and humidity
conditions are favourable, stopping the cooling circuit. This option would provide 10% of new air
requiring by installations. Free-Cooling with a tested and sophisticated control system based on
proportional enthalpy control, automatically detects and keeps the pool room conditions with
minimum energy consumption in the building.
Energy savings reached with these systems against traditional air conditioning makes their
placement essential in order to heat an indoor pool.
The BDP heat pump, air / water monoblock is a fully automated device that includes all
components of a total heat recovery system, and to be completely protected from the weather (on
request), it is also suitable for outside installation.
All components have a high performance with tested reliability through many years, and is
designed and built to provide many years of service.
POOL WATER RETURN
POOL
RETURN
AIR OUTLET
AIR INLET
OPERATION PRINCIPLE
POOL
WATER
IMPULSION
IMPULSION

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1.2. - COMPONENTS
1.2.1 - CASING
The BDP Heat Pumps casing, attends especially to the following criteria: waterproof, strength,
accessibility and aesthetics.
Waterproof is achieved by coated galvanized steel panels with plastic coated on the outside
(plastic film PVC) or aluminium (see options) also thermo-acoustic protection (profiled foam) and
anticorrosive inside (5µ thickness primer paint, made of thermosetting epoxy resin and oven-dried).
Sound absorbent plate, shaped or pyramidal, inside of the panels is made of polyurethane
absorbent foam whose surface forms were made (pyramidal or shaped) to provide a higher sound
absorption than equal thickness smooth materials.
These special forms increase the collection surface noise, allowing obtaining a considerable
improvement compared to typical values of untreated materials.
The panels are joined to a extruded aluminium frame, which is terminated by plastic junctions.
The structure that is achieved is high strength and high resistance to bending and shear stresses.
Profiles torques are absorbed by the aluminium parts of the vertices of the unit.
The panels are easily removable to allow access to the inside of the machine for maintenance
or for removal of any component thereof.
The aesthetics of the BDP heat pump is achieved by coating aluminium profiles.
Heat pumps can be built in modules for later assembly on site, by transport conditions and /
or accessibility to the installation. Our Technical Department will consider the right solution in each
case.
1.2.2 –FILTERS SECCTION.
To clean the air of impurities is necessary to use filter elements studied specifically for each
application.
To extend the life of the filters is necessary that the ventilation of the machine not stop more
than 4 hours a day.
In standard models, the battery filter is assembled on the front panel of the machine, so that it
is easily replaced or cleaned. The machine also includes F6 and F8 filters according to RITE. These filters
will be adapted to the regulations of each country.
1.2.3 –COILS SECCTION
The pushed or aspired air goes through a reheat coil (hot water) and/or condenser and
evaporator coils (refrigeration gas). According to the relative temperatures of the two fluids will
produce a cooling and/or heating air.
- Reheat coil often is used with steam or hot water, although there are other electric resistors.
Normally the resistors are made of steel tubes and rectangular fins to improve heat radiation.

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In our standard models the heating fluids is water, reheat coils use copper pipes and coated
aluminium fins in order to resist in corrosive environments.
- Condenser coil is used for drying and warming the air due to R-407C refrigerator
Condenser coil are made of copper pipes and coated aluminium fins in order to resist in
corrosive environments.
- Evaporator coil have a stainless steel condensation tray on the bottom, including a drain
pipe to outside.
Usually designed for low air speeds with a limit around 2.7 m/s maximum speed
recommended to avoid droplet condensation.
1.2.4 –VENTILATION SECTION.
BDP Heat pumps assemble one or more radial centrifugal fans. The fans layout can push air
upwards, in front or behind, and optionally to false ceiling. They can change available standard
pressure and flow.
Fans are the elements to produce air flow. By definition, are devices that produce lower differential
pressures under 0.25 Kg/cm2, at sea level.
1.2.5 –COOLING CIRCUIT.
Depending on the model can have one or two circuits; optionally you can include more
circuits. Each consists:
* SCROLL compressors, hermetic or semi-hermetic with internal protection.
* Evaporator coil made of copper tube and aluminium fins for chlorinated air.
* Battery condenser copper tube and aluminium fins for chlorinated air.
* Titanium condenser pool water.
* High Pressure and Low Pressure (LP / HP) switches with manual reset.
* Expansion valve.
* Drier filter.
* Liquid Viewer.
* Liquid Deposit/s.
In some models whose compressors have a power higher than 7.5 hp per circuit are installed the
following:
* Shut-off valves to prevent excessive migration of oil to the compressor.
* Replaceable drier filter.
* High and low pressure gauges.
Standard models condense in water and air (40% water and 60% on air), after reaching the air
set point.
1.2.6 –HYDRAULIC CIRCUIT
BDP heat pump models have a titanium condenser for heating water pool and have a flow
switch in the condenser inlet. In case of having no water flow, machine would pass to condense 100%
air.

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You can optionally add tubular or plate heat exchanger powered by hot water from a power plant, or
electric exchanger.
"Any component or method for heating the wáter additional to the ones already installed in our
machine, has to be installed (mandatory) after the pool wáter outlet (hydraulic circuit) of the
dehumidifier"
1.2.7 - OPTIONS
1. FREE COOLING. MIXTURE CHAMBER. consists of two chambers, the first, return / extraction fan
discharge, provided with a gate to the expulsion air, and the second a mixer section with outside air
gate and return gate.
The gates listed above allow, by suitable control, to use the heat recovery system known, Free-
cooling.
Gates are driven by servomotors with proportional enthalpy control.
Filter efficiency 83% -90% set in rechargeable frame.
2. HOT WATER COIL for air heating made of copper tube and aluminium fins coated to resist
chlorinated air. Three-way valve in hot water inlet regulated according to air temperature.
3. WATER-WATER EXCHANGER, special for swimming pool water heating. Three-way valve in hot water
inlet regulated according to inlet pool water temperature.
4. ELECTRIC EXCHANGER for pool water heating in If you cannot have support of a thermal plant.
5. ENTHALPY CONTROL, fully automatic, regulated by control unit, digital display and can be
connected to computer with SIEMENS/ TREND control system.
DIGITAL CONTROLLER
PROGRAMMABLE DISPLAY
ENVIRONMENT SENSOR
PIPE SENSOR
IMMERSION SENSOR
AIR DIFFERENTIAL PRESSURE
CONNECTION KIT
6. IMPULSION PLENUM, built in aluminium and laminated sheet, with the possibility to incorporate
several double deflection grilles and flow control, for pools in which you cannot build a network of air
distribution ducts.
7. RETURN PLENUM built in aluminium and laminated sheet, with the possibility to incorporate several
aspiration grilles, for pools in which you cannot build a network of air distribution ducts.
8. FLOW AND PRESSURE INCREASE in standard models, when due to the dimensions of the pool room,
you must move more flow.
9. MIXTURES CHAMBER built with aluminium profile and plastic coated sheet to outside air inlet.
10. CROSS FLOW HEAT RECOVERY
11. HEAT PIPE COILS, to energy saving.

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1.2.8 –CONTROL SECTION.
Full system, installed and tested to ensure optimal performance with minimal power
consumption at all times.
The electric box in standard models is composed of:
* Main RCD switch.
* Magneto-thermal switch
* Phase Control.
* Contactors and thermal relays.
* Internal Wiring
* Interconnect terminals and ground.
* Power Terminals.
* Earth leakage switches.
* Electronic Starter for fans
*Communication protocol
* Relays
* Siemens regulation modules

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The control panel in standard models is mounted on the machine front (depending on
model), with the following components (depending on model):
Emergency
Stop switch
Touch
Display
Soft Electronic
Starter
Contactors
Thermal
relay
Siemens
Regulation
modules
Relays
24V Power
supply
Phase
Control
Main RCD
Breaker
Safety
Fastener
Magneto-
thermal switches
Power terminals
Interconnect
terminals
Comunication
Protocol

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* Emergency stop switch.
* Touch Display Controller
All devices include adjustable enthalpy control unit fully automatic with proportional control of the
gates in free-cooling models, and possibility to network (BARNET, MODBUS, and LON communication
protocol).
2. PERFORMANCE MANUAL, INSTALLATION AND MAINTENANCE
2.1- INSTALLATION
2.1.1. –MACHINE INSTALLATION
These units are supplied fully assembled, with complete electrical wiring and its definitive load
of refrigerant charge. Furthermore, every machine has been tested in factory before being packaged
and shipped. (It is assembled and tested in the installation when the factory test is not possible).
The compressor contains its own oil charge (depending on model).
The hydraulic circuit of the unit has been carefully emptying to avoid residual water in the
casing of the evaporator and prevent any risk of corrosion in case of prolonged storage of the heat
pump.
For any information or queries regarding the unit, you need to inform us the model, serial
number and manufacture year.
2.1.2. - PROPERLY MACHINE LOCATION
1 –It must be placed on a slab, strong enough to support the weight, avoiding water contact
with the bottom of the unit.
2 - It must take all cautions for avoid any vibration transmission on the floor, in the condenser
linkages or pipes:
- Rubber or antivibration materials under the chassis of the unit.
- Flexible hoses on suction and impulsion air (units with centrifugal fans).
- Antivibration hoses on hydraulic connections (depending on model).
3 - It must be ensured the air flow in coils.
The layout of the air ducts must be properly sized and the value of pressure loss does not
exceed the available pressure in fans.
4 - The air outlet and inlet of the unit will be installed at a sufficient distance from each other
in order to avoid air mixture.
5 - It would also provide for a door or removable part on outside air inlet in order to check the
state of coil dirt and it can be cleaned.
6 –It is necessary to keep enough room (Minimum 1 m. free to the walls or to other items of
the installation) around the machine to allow maintenance of it.

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WARNING: All pipe installation should be carefully cleaned and rinsed. The filters should be cleaned
and rinsed or replaced if necessary. If an acid is used to clean the circuit, the evaporator must be
bYPASSED. Then, the circuit will be carefully rinsed with water or with a mild product.
WARNING: The hydraulic circuit mustnot be made of galvanized steel. We do not responsible for the
damage that you could cause ignoring these indications.
2.1.3. - WATER CAPACITY HYDRAULIC CIRCUIT
The amount of water contained in the circuit should be at least about 15 liters per kW of
cooling capacity provided by the unit. The maximum hydraulic pressure is 0.35 MPa. Include a buffer
reservoir in the hydraulic circuit if it is necessary.
2.1.4. - WATER TREATMENT
We recommend call a specialist water service to decide if this treatment is necessary for
installation.
We decline any responsibility for the disasters that could cause to our parts water that is not treated or
inadequately treated.
WARNING: The assembled parts in standard models are designed to function with clear water, no
pollution or additives and PH between 7.2 and 7.6.The parts leave the factory without any protection
against the ice. Therefore, it is necessary to drain it during periods of non-use.
2.1.5–ELECTRICAL CONNECTIONS
Our machine has been manufactured to use electrical power according to customer national rules.
Standard power supply required by all our products is 380 v. phase - 50 Hz + T + N. They can be any
other power supplies. Please consult us.
The customer or his installer must do the following tasks:
- To route the appropriate cable from the main switchboard to the machine. The cable will be
a 5 wires cable (3 phases + ungrounded+ground), properly sized (see technical features).
- In the main switchboard, the connection must be protected by the following switchgear
elements properly sized:
•Thermal magnetic current device.
•Break-circuit RCD.
-In machines with electronic fans, the installation earth leakage switch that protects the machine
should be a suitable Class B differential super-immunized
-The device must be installed according to the national electric rules.
2.2. –SET UP
2.2.1. –GOODS RECEPTION
It is important to check the goods at arrival, when the carrier is still in place. In case of damage,
notify it on the delivery note.

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Please check that goods are according to your order and to the delivery note.
Handling facilities must be according to the size and weight of the machine
2.2.2. –DEVICE EMPLACEMENT
Check the placement of the unit, their level and the measures provided for maintenance are
respected.
BEFORE CONNECTING TO ELECTRICAL SUPPLY
HYDRAULIC CIRCUIT
Check no leaks in water pipes, joins, valves, etc.
Check thermometers set-up.
Check for pressure connections or a pressure gauge with isolating valve on the water inlet and
outlet to measure water loss from the evaporator and check that it is in accordance with that shown in
our documentation or our proposition.
Verify the performance of the water pump (rotation direction).
Check that the installation has been carefully cleaned, and the filters are clean.
Check that there is a flow switch in the system water.
Check that the probes of thermostats or safety devices in their positions.
ELECTRIC EQUIPMENT
Check that the voltage at the line beginning corresponds to the power contained in the
construction features sticker, wiring diagrams and other documents of the unit.
Standard Power Required: 380 v. / 3 Ph / 50 Hz + N + T.
Our warranty does not cover damage to our materials for maltreatment, wrong electrical
connections, wrong operation, bad or unsuitable use, etc.
Control wiring: cable section, disconnectors and fuse cuts, according to the installation.
Inspect all electrical installations. They must be clean and properly adjusted. Systematically
adjust and make sure electrical cords are sufficiently tightened.
Make sure that the electrical wiring is in accordance with the wiring diagram supplied with the
unit.
Check security switch (Hp switch, antifreeze thermostat ...) are rearmed. If necessary, reset
boxes in the devices.
OTHERS
FAN
Manually check that the electric motor and the fan turbine rotate freely.
FINNED COIL
Check the general condition of the finned coil.
Check that the fins are not damaged and that no foreign object disturbs the fluid and air flow over
them. If necessary, clean and straighten the fins with the help of a suitable material (fin comb).

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INSTALLATION AND STARTING UP OF EXTERNAL CONDENSER
1. External condenser pipeline design.
2. Claping elements placement.
3. Set up pipes from the machine to the external condenser.
4. Set up wiring from the machine to the external condenser.
5. Weld the connections from the external condenser pipes to the machine.
6. Put chargeobus in the input and outpu pipes of the machine.
7. The gas outlet pipe is welded to the machine.
8. The liquid return pipe isnot welded for now.
9. Clean the pipes installed with nitrogen.
10. Block the pipeline before the machine anddo leakage test.
11. After leaks checking, weld this pipe to the machine.
12. Make vacuum through the obuses installed.
13. Once, vacuum test is successfully done, start the machine.
14. Put a very low temperature setpoint (to open the solenoid external condenser)
15. Check the correct solenoids operation.
16. Adjust the gas charge
17. Check machine performance.
18. Put the machine in normal operating setpoints.
OPTIONS
This list is no exhaustive. The installer may proceed to any check that he considered
appropriate.
STARTING
The installer will follow the instructions described in the previous pages before calling the
After-Sales Service for starting.
Also must be checked:
- The hydraulic circuit is ready to operate, filled with water, drained and its filter has been cleaned after
a minimum of two hours operation of the water circulation pump.
- The oil compressor level is correct.
- That there is sufficient thermal load the day when our staff goes for the unit starting.
- The condenser water circuit is completed and ready to being used.
- That the reserved clearance around the unit is sufficient and allows free access to all these
components.
PRELIMINARY OPERATIONS
All heat pumps leave our factory after a vacuum test, dehydrated and with the correct
refrigerant charge before shipment.
WARNING: Check that the suction valves and discharge of each compressor are well opened and the
liquid outlet valves are also opened. Severe damage can occur if the compressor starts with their
valves closed.

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2.2.3. –STARTING THE MACHINE
Water circulation pump in operation:
Heat Pump starts turning the switch "ON / OFF" this includes in its aluminum dashboard.
If the unit does at not start check:
- The water flow controller switch.
- The water circulation pump fixing structure.
- The thermostat control is calibrated at the working temperature.
After unit start, let it run for about ten minutes to stabilize pressure, then check:
- The compressor oil level.
- Absorbed current.
- The compressor operating pressures.
- The sigth glass in the liquid line.
- The evaporator superheat.
- The liquid subcooling.
- The inlet and outlet water temperatures.
WARNING: A very low superheat (expansion valve very open) can bring on liquid into the compressor
and cause deterioration. Inadequate value is corrected by adjusting the valve superheat expansion.
WARNING: Excessive compressor oil indicates the presence of dissolved refrigerant as a result of
insufficient lubrication of the compressor. Stop the coolant and look for the cause.
WARNING: Once the equipment has been launched, STOP / START, The machine must be turned
ON/OFF through the controller (do not use the main switch).
2.2.4. –PERFORMANCE FAULTS
COOLING CYCLE:
A) COMPRESSOR DOESN’T START
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
No power supply
Main switch, emergency stop
is opened
Check and connect.
No voltage at the compressor
terminals.
El automático ha saltado.
Tighten or replace.
Contacts of one security
switch opened
The automatic switch is
opened
Thermal relay is opened
Reset.
Voltage at the compressor
terminals , but it don’t run
Compressor Burned or seized
up.
Repair or replacement.

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B) COMPRESSOR STOPS
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
High pressure switch switched
off.
See F
See F
Low pressure switch switched
off.
See I.
See I.
Internal compressor
protection switched off.
a.- Voltage too low
b. - Current absorbed too
high due to a too high
condensation temperature.
a.- Claim to the company
b.- See F.
Antifreeze switch
disconnected
a.- Evaporator water foil
decrease
a.- Water flow control
C) COMPRESSOR OPERATES CONTINUOUSLY
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
The compressor is noisy and
high pressure is too low and
low pressure is too high.
Compressor valves faulty.
Check compressor
D) NOISY COMPRESSOR
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Compressor hit the head
Broken internalcompressor parts.
Check compressor
Aspiration tubes are
abnormally cold. Compressor
hit the head
Liquid return
Check overheating and
check expansion valve
bulb position.
Too high HP
a. - Condensing air temperature too
high.
b. - Insufficient air flow to the
condenser.
c. - Check for any paper or other
objects that block the air inlet to
the condenser.
d. - Fan turning direction incorrect.
a.- Check condenser
b.- Check air flow
c.- Remove objects
d.- Check turning
direction
E) LOW INSTALLATION PERFORMANCE
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Expansive valve whistles
Lack coolant
Add coolant
Variation of the refrigerant
temperature at the height of
the filter or expansion valve.
Dirty filter drier
Clean filter
Intermittent or continuous
operation
a. - Blocked or obstructed
expansive valve.
b. - Bad regulated superheat.
c. - Válvula de expansión averiada.
a. - Repair or replace.
b. - Regulate expansion
valve and verify superheat.
c. - Repair or replace.
Water flow decreased
Obstruction in the water circuit.
By-pass too open.
Remove the obstruction.
Close.

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F) HP TOO HIGH
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
The air from the condenser is
too hot.
Condenser air insufficient or
very hot.
Check fan function.
The air from the condenser is
at the inlet temperature.
Condenser and filter is very
dirty.
Clean it.
Condenser too hot.
Excess of air or refrigerant in
installation.
Purge or eliminate refrigerant
excess.
G) LP TOO LOW
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Air from the condenser is too
cold.
Condensing pressure
regulating system is not
working
Repair or replace
H) SUCTION PRESSURE TOO HIGH
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Noisy compressor
Compressor suction valves
broken.
Check the valves and remove
it
High pressure too low
Reversing valve faulty.
Repair or replace
I) SUCTION PRESSURE TOO LOW
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Lack of refrigerant
Gas leakage in the refrigerant
circuit.
Remove leakage and refill.
Refrigerant temperature
variation at the filter height.
Liquid filter blocked
Replace filter
Refrigerant does not pass
through the valve.
The thermostatic element of
the expansion valve lost part
of the load.
Replace thermostatic element
Performance loss
Expansive valve blocked
Clean or replace expansive
valve
Environmental temperature
too cold.
Control thermostat contacts
locked in closed position.
Repair or replace the cold
control thermostat.
Excessive superheat.
Too high pressure drop in the
evaporator
Check that the external
equalizer is not obstructed.

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HEATING CIRCUIT:
A) COMPRESSOR DOESN’T START
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
No power supply
Main switch, emergency stop
is opened
Check and connect.
No voltage at the compressor
terminals.
El automático ha saltado.
Tighten or replace.
Contacts of one security
switch opened
The automatic switch is
opened
Thermal relay is opened
Reset.
Voltage at the compressor
terminals , but it don’t run
Compressor Burned or seized
up.
Repair or replacement.
B) COMPRESSOR STOPS
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
High pressure switch switched
off.
See F
See F
Low pressure switch switched
off.
See I.
See I.
Internal compressor
protection switched off
a.- Voltage too low
b. - Current absorbed too
high due to a too high
condensation temperature.
a.- Claim to the company
b.- See F.
C) COMPRESSOR OPERATES CONTINUOUSLY
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
The compressor is noisy and
high pressure is too low and
low pressure is too high.
Compressor valves faulty.
Check compressor
D) NOISY COMPRESSOR
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Compressor hit the head
Broken internalcompressor
parts.
Check compressor
Aspiration tubes are abnormally
cold. Compressor hit the head
Liquid return
Check overheating and check
expansion valve bulb position.
Too high HP
a.- Condensing air
temperature too high.
b.- Insufficient air flow to the
condenser.
C.- Check for any paper or
other objects that block the
air inlet to the condenser.
D.- Fan turning direction
incorrect.
a.- Check condenser
b.- Check air flow
c.- Remove objects
d.- Check turning direction

BDP SERIES
E) LOW INSTALLATION PERFORMANCE
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Expansive valve whistles
Lack coolant
Add coolant
Variation of the refrigerant
temperature at the height of
the filter or expansion valve.
Dirty filter drier
Clean filter
Intermittent or continuous
operation
a.- Blocked or obstructed
expansive valve.
b.- Bad regulated superheat.
C.- Válvula de expansión
averiada.
a. - Repair or replace.
b. - Regulate expansion valve
and verify superheat.
c. - Repair or replace.
Water flow decreased
Obstruction in the water
circuit.
By-pass too open.
Remove the obstruction.
Close.
F) HP TOO HIGH
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
The air from the condenser is
too hot.
Condenser air insufficient or
very hot.
Check fan function.
The air from the condenser is
at the inlet temperature.
Condenser and filter is very
dirty.
Clean it.
Condenser too hot.
Excess of air or refrigerant in
installation.
Purge or eliminate refrigerant
excess.
G) HP TOO LOW
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Condenser inlet water is too
cold
Regulating condensation
pressure valve does not act.
Check Valve, control unit and
sensor. Repair or replacement.
H) SUCTION PRESSURE TOO HIGH
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Noisy compressor
Compressor suction valves
broken.
Check the valves and remove
it
High pressure too low
Reversing valve faulty.
Repair or replace
I) SUCTION PRESSURE TOO LOW
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Lack of refrigerant
Gas leakage in the refrigerant
circuit.
Remove leakage and refill.
Refrigerant temperature
variation at the filter height.
Liquid filter blocked
Replace filter
Refrigerant does not pass
through the valve.
The thermostatic element of
the expansion valve lost part
of the load.
Replace thermostatic element

BDP SERIES
Performance loss
Expansive valve blocked
Clean or replace expansive
valve
Environmental temperature
too cold.
Control thermostat contacts
locked in closed position.
Repair or replace the cold
control thermostat.
Excessive superheat.
Too high pressure drop in the
evaporator
Check that the external
equalizer is not obstructed.
J) CHANGE SUMMER OR WINTER MODE OR VICEVERSA
TROUBLE DETECTED
PROBABLE CAUSES
SOLUTIONS
Inverse valve does not act
Solenoid valves don’t act
Check valve and relay
2.2.5. - REGULATION ELEMENTS
High Pressure switch controls condenser performance. A poor performance resulting from
condensation pressures too high, it is usually caused by:
- Dirty condenser.
- Reduced air flow.
Low Pressure switch monitors the pressure at which the refrigerant evaporates in the
evaporator tubes. A low evaporation pressure is usually caused by:
- Lack of refrigerant.
- Thermostatic expansion valve faulty.
- Filter Drier obstructed.
-Compressor discharge system inoperative (Power reduction).
Cold water thermostat regulates the temperature of cold water to the evaporator inlet. The
most common causes of water temperature in this area are:
- Reduced water flow.
- Thermostat regulating at very low temperatures.
The oil pressure switch detects the difference between back pressure pump compressor oil
(semi-hermetic compressors), and the prevailing pressure in the compressor crankcase. This difference
is the net pressure of the oil or the oil pressure chamber. Weak oil effective pressure is usually the
result of:
- Lack of oil.
- Faulty oil pump.
- Reheating defective crankcase, causing condensation of the coolant in the crankcase bottom.
- Thermostatic expansion valve incorrectly set.