LG Therma V AHBW Series User manual

CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
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System
GENERAL SVC MANUAL
MODEL : AHBW Series

AWHP Service Manual
TABLE OF CONTENTS
Safety Precautions............................................................................................................................3
1. General Information......................................................................................................................7
2. Features and Controls................................................................................................................10
3. Basic Contol ................................................................................................................................36
4. Replacement................................................................................................................................38
5. Trouble Shooting Guide .............................................................................................................42

- 3 -
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
nMeanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
WARNING
nInstallation
Ask the dealer or an authorized technician to
install the air conditioner.
• Improper installation by the user may result in
water leakage, electric shock, or fire.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
• This could result in personal injury and product
damage.
Always ground the product.
• There is risk of fire or electric shock.
Always intstall a dedicated circuit and breaker.
• Improper wiring or installation may cause fire or
electric shock.
For re-installation of the installed product, al-
ways contact a dealer or an Authorized Serv-
ice Center.
• There is risk of fire, electric shock, explosion, or
injury.
Do not install, remove, or re-install the unit
by yourself (customer).
• There is risk of fire, electric shock, explosion, or
injury.
Do not store or use flammable gas or
combustibles near the air conditioner.
• There is risk of fire or failure of product.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.

- 4 -
nOperation
Ventilate before operating air conditioner
when gas leaked out.
• It may cause explosion, fire, and burn.
Securely install the cover of control box and
the panel.
• If the cover and panel are not installed securely,
dust or water may enter the outdoor unit and fire
or electric shock may result.
Do not damage or use an unspecified power
cord.
• There is risk of fire, electric shock, explosion, or
injury.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
Do not touch the power switch with wet
hands.
• There is risk of fire, electric shock, explosion, or
injury.
Prepare for strong wind or earthquake and
install the unit at the specified place.
• Improper installation may cause the unit to top-
ple and result in injury.
Do not install the product on a defective in-
stallation stand.
• It may cause injury, accident, or damage to the
product.
When installing and moving the air condi-
tioner to another site, do not charge it with a
different refrigerant from the refrigerant
specified on the unit.
• If a different refrigerant or air is mixed with the
original refrigerant, the refrigerant cycle may
malfunction and the unit may be damaged.
Do not reconstruct to change the settings of
the protection devices.
• If the pressure switch, thermal switch, or other
protection device is shorted and operated
forcibly, or parts other than those specified by
LGE are used, fire or explosion may result.
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
Be cautious not to touch the sharp edges
when installing.
• It may cause injury.

- 5 -
CAUTION
nInstallation
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
Do not install the product where the noise or
hot air from the outdoor unit could damage
the neighborhoods.
• It may cause a problem for your neighbors.
Keep level even when installing the product.
• To avoid vibration or water leakage.
Do not install the unit where combustible gas
may leak.
• If the gas leaks and
accumulates around the
unit, an explosion may
result.
Use power cables of sufficient current
carrying capacity and rating.
• Cables that are too small may leak, generate
heat, and cause a fire.
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It
is a consumer air conditioner, not a precision
refrigeration system.
• There is risk of damage or loss of property.
Keep the unit away from children. The heat
exchanger is very sharp.
• It can cause the injury, such as cutting the finger.
Also the damaged fin may result in degradation
of capacity.
When installting the unit in a hospital, com-
munication station, or similar place, provide
sufficient protection against noise.
•
The inverter equipment, private power generator,
high-frequency medical equipment, or radio com-
munication equipment may cause the air condi-
tioner to operate erroneously, or fail to operate. On
the other hand, the air conditioner may affect such
equipment by creating noise that disturbs medical
treatment or image broadcasting.
Do not install the product where it is exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient operation.

- 6 -
Safely dispose of the packing materials.
•
Packing materials, such as nails and other metal or
wooden parts, may cause stabs or other injuries.
•
Tear apart and throw away plastic packaging bags
so that children may not play with them. If children
play with a plastic bag which was not torn apart,
they face the risk of suffocation.
Turn on the power at least 6 hours before
starting operation.
• Starting operation immediately after turning on
the main power switch can result in severe
damage to internal parts. Keep the power switch
turned on during the operational season.
nOperation
Do not use the air conditioner in special
environments.
• Oil, steam, sulfuric smoke, etc. can significantly
reduce the performance of the air conditioner or
damage its parts.
Do not block the inlet or outlet.
• It may cause failure of appliance or accident.
Make the connections securely so that the
outside force of the cable may not be applied
to the terminals.
• Inadequate connection and fastening may gen-
erate heat and cause a fire.
Be sure the installation area does not deteri-
orate with age.
• If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, or personal injury.
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
• A bad connection may cause water leakage.
Be very careful about product transportation.
• Only one person should not carry the product if it weighs more
than 20 kg.
• Some products use PP bands for packaging. Do not use any PP
bands for a means of transportation. It is dangerous.
• Do not touch the heat exchanger fins. Doing so may cut your fin-
gers.
• When transporting the outdoor unit, suspending it at the specified
positions on the unit base. Also support the outdoor unit at four
points so that it cannot slip sideways.

- 7 -
Part 1
General Information
1. Model Names ..................................................................8
2. External Appearance .......................................................8
3. Nomenclature...................................................................9

- 8 -
1. Model Names
Model name and related information
* : tested under Eurovent Heating condition (inlet Water temperature 30 °C ’35 °C at outdoor ambient temperature
7 °C DB/ 6 °C WB)
** : tested under Eurovent Cooling condition (inlet Water temperature 23 °C ’18 °C at outdoor ambient tempera-
ture 36 °C DB/ 24 °C WB)
Unit Capacity Power Source (Unit) Chassis
Heating (kW)* Cooling (kW)**
AHBW056A0 4.99 4.99 220-240 V~ 50 Hz UN4
AHBW076A0 7.00 7.00 220-240 V~ 50 Hz UN4
AHBW096A0 9.00 9.00 220-240 V~ 50 Hz UN4
AHBW126A0 12.00 14.50 220-240 V~ 50 Hz UN3
AHBW146A0 14.00 15.50 220-240 V~ 50 Hz UN3
AHBW166A0 16.00 16.10 220-240 V~ 50 Hz UN3
2. External Appearance
AHBW056A0
AHBW076A0
AHBW096A0
AHBW126A0
AHBW146A0
AHBW166A0

- 9 -
Cycle compartment
9 8
31 2
7
6
10
4
5
11 12
A
AB
B
Description
No Name Remarks
1 Entering water pipe PT 25.4mm(Female type)
2 Leaving water pipe PT 25.4mm(Female type)
3 Strainer Filtering and stacking particles inside circulating water
4 Electronic heater Providing additional heating capacity to the water circuit
5 Control box PCB and terminal blocks
6 Plate heat exchanger Heat exchange between refrigerant and water
7 Water pump Circulating the water
8 Pressure gage Indicates circulating water pressure
9 Safety valve Open at water pressure 3 bar
10 Expansion vassel Protecting components from water pressure
11 Main PCB assembly(Inverter) This PCB controls the cycle parts of the unit
12 Main PCB assembly(Heater) This PCB controls the functioning of the unit
AHBW056A0/AHBW076A0/AHBW096A0

- 10 -
91 2
12
11
3
8
6
4
10
7
5
A
A
B
B
Description
No Name Remarks
1 Entering water pipe PT 25.4mm(Female type)
2 Leaving water pipe PT 25.4mm(Female type)
3 Strainer Filtering and stacking particles inside circulating water
4 Electronic heater Providing additional heating capacity to the water circuit
5 Control box PCB and terminal blocks
6 Plate heat exchanger Heat exchange between refrigerant and water
7 Water pump Circulating the water
8 Pressure gage Indicates circulating water pressure
9 Safety valve Open at water pressure 3 bar
10 Expansion vassel Protecting components from water pressure
11 Main PCB assembly(Inverter) This PCB controls the cycle parts of the unit
12 Main PCB assembly(Heater) This PCB controls the functioning of the unit
AHBW126A0/AHBW146A0/AHBW166A0

- 11 -
3. Nomenclature
Model number nomenclature
A H BW 1 6 6 A 0
Serial number
Product electric power rating
6 : 220-240 V~ 50 Hz 8 :380-415 V3~ 50 Hz
Chassis name / Function
A : General heating heat pump H : Sanitary heating only
T : High temperature heating heat pump
Heating capacity (kW)
Ex) 16 : 16kW class
Model Type
W : Inverter heat pump H : Heat pump
Classification
N : Indoor unit U : Outdoor unit B : Monobloc
Air-to-Water Heat Pump for R410A

- 12 -
Notes
O : Applied, X : Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
Category Function AHBW126A0/AHBW146A0/AHBW166A0
Installation
Drain pump -
E.S.P. control -
Indoor Box -
High ceiling operation -
Reliability
Hot start -
Self diagnosis O
Soft dry operation -
Defrost / Deicing O
sensor O
Phase protection -
Restart delay (3-minutes) O
Self diagnosis O
Soft start -
Test function -
Convenience
Auto changeover -
Auto cleaning -
Auto operation(artificial intelligence) -
Auto restart operation O
Child lock O
Forced operation -
Group control -
Sleep mode -
Timer(on/off) O
Timer(weekly) O
Two thermistor control -
Individual
control
Standard wired remote controller (control panel) O
Deluxe wired remote controller -
Simple wired remote controller -
Simple Wired remote controller (for hotel use) -
Wireless remote controller (simple) -
Wireless LCD remote control -
CAC network
function
General central controller (Non LGAP) -
Dry contact (PQDSA) O
Network Soluation (LGAP) O
PDI(power distribution indicator) -
PI 485 PMNFP14A0
Special
function kit
Zone control -
CTIE -
Electronic thermostat -
Low ambient operation -
Others Remote room temperature sensor (TH8)
PQRSTA0
Thermistor -
AWHP
Water Pump ON / OFF Control O
Flow Switch Control O
Thermostat Interface (230 V AC) O
Sanitary Tank Heating O
PHEX Anti-Freezing Control O
Water Pump Forced Operation O
Autosetting according to Ambient Temperature O
Silent Operation O
Anti-overheating of Water Pipe O
Emergency Operation O
Screed drying O

- 13 -
Part 2
Features & Controls
1. List of Function..............................................................11
2. Features & Controls ......................................................12
3. Test Run..........................................................................34

- 14 -
AHBW056A0/AHBW076A0/AHBW096A0
1. List of Function
Notes
O : Applied, X : Not applied, – : No relation
* Accessory: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
Installation Drain pump X
E.S.P. control X
Indoor Box X
High ceiling operation X
Reliability Hot start X
Self diagnosis O
Soft dry operation X
Defrost / Deicing O
High pressure sensor O
Phase protection X
Restart delay (3-minutes) O
Self diagnosis O
Soft start X
Test function X
Convenience Auto changeover X
Auto cleaning X
Auto operation (artificial intelligence) X
Auto restart operation O
Child lock O
Forced operation X
Group control X
Sleep mode X
Timer (on/off) O
Timer (weekly) O
Two thermistor control X
Individual control Standard wired remote controller (control panel) O
Deluxe wired remote controller X
Simple wired remote controller X
Wired remote controller (for hotel use) X
Wireless remote controller (simple) X
Wireless LCD remote control X
CAC network function General central controller (Non LGAP) X
Dry contact (PQDSA) O
Network Soluation (LGAP) O
PDI (power distribution indicator) X
PI 485 X
Special function kit Zone control X
CTIE X
Electro thermostat X
Low ambient operation X
Others Remote room temperature sensor (TH8) PQRSTA0
Thermistor X
AWHP Water Pump ON / OFF Control O
Flow Switch Control O
Thermostat Interface (230 V AC) O
Sanitary Tank Heating O
PHEX Anti-Freezing Control O
Water Pump Forced Operation O
Autosetting according to Ambient Temperature O
Silent Operation O
Anti-overheating of Water Pipe O
Emergency Operation O
Screed drying O
Category Function

- 15 -
Notes
O : Applied, X : Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
Category Function AHBW126A0/AHBW146A0/AHBW166A0
Installation
Drain pump X
E.S.P. control X
Indoor Box X
High ceiling operation X
Reliability
Hot start X
Self diagnosis O
Soft dry operation X
Defrost / Deicing O
sensor O
Phase protection X
Restart delay (3-minutes) O
Self diagnosis O
Soft start X
Test function X
Convenience
Auto changeover X
Auto cleaning X
Auto operation(artificial intelligence) X
Auto restart operation O
Child lock O
Forced operation X
Group control X
Sleep mode X
Timer(on/off) O
Timer(weekly) O
Two thermistor control X
Individual
control
Standard wired remote controller (control panel) O
Deluxe wired remote controller X
Simple wired remote controller X
Simple Wired remote controller (for hotel use) X
Wireless remote controller (simple) X
Wireless LCD remote control X
CAC network
function
General central controller (Non LGAP) X
Dry contact (PQDSA) O
Network Soluation (LGAP) O
PDI(power distribution indicator) X
PI 485 PMNFP14A0
Special
function kit
Zone control X
CTIE X
Electronic thermostat X
Low ambient operation X
Others Remote room temperature sensor (TH8)
PQRSTA0
Thermistor X
AWHP
Water Pump ON / OFF Control O
Flow Switch Control O
Thermostat Interface (230 V AC) O
Sanitary Tank Heating O
PHEX Anti-Freezing Control O
Water Pump Forced Operation O
Autosetting according to Ambient Temperature O
Silent Operation O
Anti-overheating of Water Pipe O
Emergency Operation O
Screed drying O

- 16 -
1. Summarized Features
1.1 Emergency Control
Slight
trouble
Heavy
trouble
Easy checking of system failure
- Slight / Heavy trouble
Emergency operating
- Heavy trouble
- Electric heater ON
- Secure at least heating before A/S
2. Feature & Controls
1.2 Remote controller
• Controller Configuration
emaNoN
1 Display
2 Change Temperature Button
3 Water Heating Enable / Disable Button
4 Power Button
5 Operation Mode Selection Button
6 Silent Mode On / Off Button
7 Temperature Setting Mode Button
8 Temperature View Mode Button
9 Function Setting Button
10 Programming Button
11 Direction Button (Up, Down, Left, Right)
12 Set / Clear button
13 ESC Button

- 17 -
• Display Panel
Cooling
Heating
Weather-dependent Heating
Space Temp.
Water Inlet Temp.
Water Outlet Temp.
Central Controller
Thermostat
Electric Heater (1)
Electric Heater (2)
Water Tank Electric Heater
Water Pump
Solar Thermal circulation pump
Water Tank Heating Enable / Disable
Water Tank Heating (by Heat Pump)
Silent Mode ON / OFF
Water Tank Temp.
Solar Heating Temp.
Defrost
Water-Pipe Anti Freezing
Water Tank Disinfection
Outdoor Unit
Child Lock
Not Available Function
Slight Trouble
Heavy Trouble

- 18 -
2.1 Child Lock Function
This function prevents children or others from tampering with the control buttons on the unit.
• All the buttons on indoor display panel will blocked.
The function is used to restrict children to not to use the AWHP carelessly.(CL is an abbreviated form of Child Lock.)
2. Special Function
Press Function Setting button to enter
user setting mode.
(The segment will be flashed)
1
Press OK / CLEAR button to finish the
selection. The segment will be disappear.
2
During Child Lock, icon and 'CL' will be
displayed during 3 seconds whenever
entering any kind of buttons except for view
temperature button and setting/clear button .
3
To release this setting, pressing
function setting button until
icon flash and then enter
setting/clear button.
4
ZDWHU
ZDWHU
WHPS
WHPS
RSHU
RSHU
KHDWLQJ
KHDWLQJ
PRGH
PRGH

- 19 -
2.2 Sleep Timer Operation
• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the control panel while in appliance oper-
ation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
2.3 Timer (On / Off)
2.3.1 On-Timer Operation
• When the set time is reached after the time is input by the control panel, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
2.3.2 Off-Timer Operation
• When the set time is reached after the time is input by the control panel, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
2.4 Weekly Program
• If necessary, an operator can make an On / Off reservation of the product for a period of one week.
- On / Off schedule of operation for a period of one week.
• No need to turn the unit On / Off manually during working days.
On / Off time is scheduled in micom of the wired remote control.
Operation Time Table (Example)
Mon Tue Wed Thu Fri Sat Sun
Off
Setting
Temp.
On
Off
25 ℃ 25 ℃ 25 ℃ 25 ℃ 25 ℃
09:00
12:00
08:00
17:00
09:00
12:00
08:00
12:00
09:00
12:00
2.5 Sanitary Tank Heating Scheduler & Sanitary Tank Heater Scheduler
• If necessary, enable or disable of sanitary tank heating or sanitary tank heater can be programmed according to user’s
specific time.
• Schedulers are operating everyday.
2.6 Silent mode operation
• If necessary, enable or disable of silent mode can be programmed according to user’s specific time.
2.7 Screed drying
• If necessary, enable or disable of screed drying can be programmed according to user’s setting.
• While the screed drying mode is operating, “Dry” is displayed.

- 20 -
3. System Set-up
The Heatpump is designed to satisfy various installation environment, it is important to set up sys-
tem correctly. If not configured correctly, improper operation or degrade of performance can be expected.
Turn off electric power supply before setting DIP switch.
• Whenever adjusting DIP switch, turn off electric power supply to avoid electric shock.
General information
CAUTION
876
54321
87654321
OFF
ON
3.1 DIP Switch Setting