LG | ARNH08GK3A2.EWGBIDA | LG ARNH04GK3A2.EWGBIDA Owner’s Manual

OWNER’S MANUAL
AIR
CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
Hydro Kit (For High Temperature)
Original instruction
www.lg.com
P/NO : MFL67870244
Hydro Kit Owner’s Manual
TABLE OF CONTENTS
Safety Precautions .............................3
Product Introduction ..........................6
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Owner's Instruction ............................8
Serial #
Using Thermostat .............................21
You can find them on a label on the side of each
unit.
Maintenance and Service.................24
Installer's Name
Management of plate-type heat
exchanger..........................................25
Purchased Date
n Staple your receipt to this page in the event you
need it to prove date of purchase or for warranty
issues.
READ THIS MANUAL
Inside you will find many helpful hints on how to use and
maintain your Hydro Kit properly. Just a little preventive
care on your part can save you a great deal of time and
money over the life of your product.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call for
service at all.
PRECAUTION
• Contact the authorized service technician for repair or
maintenance of this unit.
• Contact the installer for installation of this unit.
• Hydro Kit is not intended for use by young children
or invalids without supervision.
• Young children should be supervised to ensure that
they do not play with Hydro Kit.
• When the power cable is to be replaced, replacement
work must be performed by authorized personnel
only using only genuine replacement parts.
• Installation work must be performed in accordance
with the National Electric Code by qualified and
authorized personnel only.
2 Hydro Kit
Safety Precaution
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage.
WARNING
Always ground the product.
• There is a risk of electric shock.
For electrical work, contact the dealer, seller,
a qualified electrician, or an Authorized
Service Center. Do not disassemble or repair
the product by yourself.
Do not use a defective or underrated circuit breaker. Use this appliance on a
dedicated circuit.
• There is risk of fire or electric shock.
Always ground the product as per the
wiring diagram. Do not connect the
ground wire to gas or water pipes lightening rod or telephone ground wire.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
Use the correctly rated breaker or
fuse.
Do not modify or extend the power
cable. If the power cable or cord has
scratches or skin peeled off or deteriorated then it must be replaced.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
Do not install the product on a
defective installation stand. Be sure
that the installation area does not
deteriorate with age.
Never install the outdoor unit on a
moving base or a place from where it
can fall down.
• It may cause product to fall.
Be sure to check the refrigerant to
be used. Please read the label on the
product.
• Incorrect refrigerant can prevent the
normal operation of the unit.
• The falling outdoor unit can cause
damage or injury or even death of a
person.
Don't use a power cord, a plug or a
loose socket which is damaged.
• Otherwise it may cause a fire or
electrical shock.
Do not use a multi outlet. Always use
this appliance on a dedicated circuit and
breaker.
• It can cause electric shock or fire.
Install the panel and the cover of control
box securely.
• There is risk of fire or electric shock
due to dust , water etc.
For installation, removal or reinstallation , always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
When the product is soaked (flooded or
submerged) in water , contact an
Authorized Service Center for repair
before using it again.
• There is risk of fire or electric shock.
Do not touch , operate, or repair the
product with wet hands.
• There is risk of electric shock or fire.
Hydro Kit Owner’s Manual 3
Safety Precaution
Do not place a heater or other heating
appliances near the power cable.
Do not allow water to run into electric
parts. Install the unit away from water
sources.
Do not store or use or even allow flammable gas or combustibles near the
product.
• There is risk of fire and electric shock.
• There is risk of fire, failure of the product, or electric shock.
Indoor/outdoor wiring connections must
be secured tightly and the cable should
be routed properly so that there is no
force pulling the cable from the connection terminals.
Safely dispose off the packing materials.
Like screws, nails, batteries, broken
things etc after installation or service
and then tear away and throw away the
plastic packaging bags.
Make sure to check that the power
device is not dirty, loose or broken and
then Turn on the power.
• Improper or loose connections can
cause heat generation or fire.
• Children may play with them and
cause injury.
• Dirty, loose or broken power device
can cause electric shock or fire.
In outdoor unit the step-up capacitor
supplies high voltage electricity to the
electrical components. Be sure to discharge the capacitor completely
before conducting the repair work.
When installing the unit, use the installation kit provided with the product.
Be sure to use only those parts which
are listed in the service parts list. Never
attempt to modify the equipment.
• An charged capacitor can cause electrical shock.
• Otherwise the unit may fall and cause
severe injury.
• The use of inappropriate parts can
cause an electrical shock, excessive
heat generation or fire.
Do not use the product in a tightly
closed space for a long time. Perform
ventilation regularly.
Do not open the front cover or grille of the
product during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
• Oxygen deficiency could occur and
hence harm your health.
• There is risk of physical injury, electric
shock, or product failure.
Ventilate the product room from time
to time when operating it together with
a stove, or heating element etc.
• Oxygen deficiency can occur and hence
harm your health.
Take care to ensure that power cable
could not be pulled out or damaged
during operation.
• There is risk of fire or electric shock.
4 Hydro Kit
Turn the main power off when cleaning or repairing the product.
• There is risk of electric shock.
Do not place ANYTHING on the power
cable.
• There is risk of fire or electric shock.
• There is risk of fire.
If strange sounds, smell or smoke comes
from product, immediately turn the breaker
off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Take care to ensure that nobody especially kids could step on or fall onto
the outdoor unit.
• This could result in personal injury and
product damage.
When flammable gas leaks, turn off the
gas and open a window for ventilation
before turning the product on.
• Do not use the telephone or turn switches
on or off. There is risk of explosion or fire.
Safety Precaution
CAUTION
Two or more people must lift and transport the product.
• Avoid personal injury.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product.
Keep level even when installing the
product.
• To avoid vibration or noise.
Do not install the product where the
noise or hot air from the outdoor unit
could damage or disturb the neighborhoods.
Always check for gas (refrigerant) leakage after installation or repair of product.
Do not use the product for special purposes, such as preserving foods, works
of art, etc. It is a consumer Hydro Kit,
not a precision refrigeration system.
• It may cause a problem for your neighbors and hence dispute.
• Low refrigerant levels may cause failure
of product.
• There is risk of damage or loss of property.
Do not block the inlet or outlet of air
flow.
Use a soft cloth to clean. Do not use
harsh detergents, solvents or splashing
water etc .
• It may cause product failure.
Do not insert hands or other objects
through the air inlet or outlet while
the product is operating.
• There are sharp and moving parts that
could cause personal injury.
• There is risk of fire, electric shock, or
damage to the plastic parts of the product.
Be cautious when unpacking and
installing the product.
Do not step on or put anyting on the
product. (outdoor units)
• There is risk of personal injury and failure
of product.
If the refrigerant gas leaks during the
repair, do not touch the leakaing refrigerant gas.
• Sharp edges could cause injury.
• The refrigernat gas can cause frostbite
(cold burn)
Do not tilt the unit when removing or
uninstalling it.
If the refrigerant gas leaks during
the installation, ventilate the area
immediately.
• The condensed water inside can spill.
• Otherwise it can be harmfull for your
health.
Do not expose your skin or kids or
plants to the cool or hot air draft.
Use a firm stool or ladder when
cleaning, maintaining or repairing the
product at an height.
• This could harm to your health.
• Be careful and avoid personal injury.
Dismantling the unit, treatment of the
refrigerant oil and eventual parts
should be done in accordance with
local and national standards.
Hydro Kit Owner’s Manual 5
Product Introduction
Product Introduction
Typical Installation Scene
8HP(ARNH08GK3A2)
Water Out
Communication Cable
Power Cable
Gas Side
Liquid Side
Water In
4HP(ARNH04GK3A2)
Communication Cable
Power Cable
Gas Side
Liquid Side
Water Out
Water In
CAUTION
Use of power supply separate power for the indoor unit. (Do not connect and use from the
power terminal of the outdoor unit.)
6 Hydro Kit
Product Introduction
Remote Controller
‫ڸ‬
‫ۀ‬
‫ڿ‬
‫ھ‬
‫ڽ‬
‫ہ‬
‫ۂ‬
‫ڹ‬
‫ں‬
‫ڻ‬
ZDWHU
KHDWLQJ
WHPS
RSHU
PRGH
‫ڼ‬
‫ۃ‬
‫ۄ‬
No
1
2
3
4
5
6
7
8
9
10
11
12
13
Name
Display
Change Temperature Button
Water Heating Enable / Disable Button
Power Button
Operation Mode Selection Button
Silent Mode On / Off Button
Temperature Setting Mode Button
Temperature View Mode Button
Function Setting Button
Programming Button
Direction Button (Up, Down, Left, Right)
Set / Clear button
ESC Button
h Grey painted functions may not be operated and displayed.
Hydro Kit Owner’s Manual 7
Owner's instruction
Owner's Instruction
Monitoring Information
WATER PUMP
This icon indicates that the water pump is active.
DEFROSTING
This icon indicates that the defrost mode is active.
In space heating operation or sanitary water tank heating operation, freezing of the outdoor heat exchanger may be occur due to low outdoor temperature and humidity. If this
risk occurs, the product goes into defrost operation. It reverses the cycle and takes heat
from the indoor system to prevent freezing of the outdoor system. This mode is automatically operating.
MAINTAIN LOWEST TEMPERATURE
The purpose of this mode is maintaining the temperature to prevent damage by freezing of
water pipe.
OUTDOOR
This icon indicates that the outdoor unit is active.
CHILD LOCK
NO FUNCTION
8 Hydro Kit
Owner's instruction
CENTRAL CONTROLLER
This icon indicates that the product is controlled by the central controller.
THERMOSTAT
This icon indicates connection with thermostat.
SLIGHT TROUBLE
This icon indicates that slight trouble occurs.
HEAVY TROUBLE
This icon indicates that heavy trouble occurs.
Hydro Kit Owner’s Manual 9
Owner's instruction
Mode Change
Turn on the product and select operation mode.
1
Press Power Button to turn on the product.
2
Press OPER MODE Button to select each operation mode.
Heating operation
Weather dependent
operation
Operation Mode
• Heating Operation - The product yields hot water to use in under floor heating or FCU heating.
• Weather dependent Heating Operation - In this mode, heating setpoint is automatically determined
by pre-defined temperature profile.
Selecting Target Temperature
1
Press SET TEMP Button to select each operation mode.
Room temperature
2
Water temperature
Sanitary Water Tank
temperature
Adjust desired temperature by pressing Change Temperature buttons on each mode.
To raise the Temperature
To lower the Temperature
j Note
: Increase 1°C or 2°F per one time pressing
: Decrease 1°C or 2°F per one time pressing
• We can change the temperature range of each mode on installation setting mode. Please refer
to Function Code 11 to 15.
• Room Temperature setting is available when Remote Room Air Sensor (sold separately) is
installed. Please refer to Function Code 03.
• Sanitary Water Tank temperature setting is available when Sanitary Water Tank is installed.
10 Hydro Kit
Owner's instruction
Weather-dependent Operation
This mode is only applied to heating.
In order to save energy and to give highest comfort, setting temperature will follow outside temperature. If outdoor temperature decreases, heating capacity for the house will increase automatically in
order to keep same room temperature. All parameters will be set by installer during start-up procedure and will be adapted to the site characteristic.
1
Press OPER MODE Button to select Weather-dependent operation mode.
2
Adjust the desired temperature level by pressing Change Temperature buttons.
: Weather Dependent
operation icon
Ex) Decreasing temperature profile by 3°C
(based on room air temperature)
<Temperature adjust step (unit : °C)>
-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
Cold
Hot
View Temperature
1
: View Room Temperature
Press repeatedly View
Temperature Button to select
each Temperature.
(Whenever press View
Temperature button, the room
temperature will be displayed
during 5 seconds.)
Temperature
Air
Water
: View Inlet Temperature
: View Outlet Temperature
: View Sanitary Water Temperature
(ONLY displayed when sanitary
water heating mode)
Temperature Range
Displayed as
below 11°C(51°F)
Lo
11℃(51℉) ~ 39℃(102℉)
actual temperature
above 39°C(102°F)
Hi
below 0°C(32°F)
Lo
0℃(32°F) ~ 92°C(197°F)
actual temperature
above 92°C(197°F)
Hi
Hydro Kit Owner’s Manual 11
Owner's instruction
Child Lock
This function is to prevent children or other people from using controller.
1
Press Function Setting Button to enter
user setting mode. (The segment will be flashed)
2
Press set/clear button to finish the selection.
The segment will disappear.
3
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.
4
To release this setting, press function Setting
button until
icon flashes and then enter setting/clear button.
12 Hydro Kit
Owner's instruction
Error code display
When the error occurs on indoor unit, the error code will be displayed on remote controller.
Slight trouble
A problem is found inside the indoor unit. In most case, this trouble is concerned with
sensor problems. In this case, Hydro Kit can operate in an emergency mode
(only Heating operation).
<Display>
Heavy trouble
A problem is found inside the outdoor unit.
<Display>
Critical error
On critical error, the product will stop unconditionally.
At this time, CH' and error code No. keep display by turns.
<Display>
Hydro Kit Owner’s Manual 13
Owner's instruction
Setting Current Time
You can set current time.
Keep pressing programming button twice successively to enter
Setting current time mode.
1
2
Press left, right button to adjust the current day.
3
Press down button to move to AM/PM
part and adjust it. (The AM/PM segment
will be flashed)
4
Press right button to move to "Hour"
part. (the "Hour" segment will be
flashed)
5
Press up, down button to adjust the
Hour.
6
Press right button to move to "Minute"
part. (the "Minute" segment will be
flashed)
7
Press up, down button to adjust the
Minute.
8
If you finish the setting, press set/clear
button.
9
Press exit button to exit or system will automatically release without any
input 25 seconds.
14 Hydro Kit
Owner's instruction
Programming : Setting Simple Reservation
You can easily turn-on reservation.(ONLY enable when unit is stand-by.)
1
Press programming button to enter the
Programming mode. (the segment will be
flashed)
2
Press up, down button to adjust the reservation time.
3
If you finish the setting, press setting/cancel button to complete programming
4
Press exit button to exit or system will automatically release without any
input after 25 seconds.
Programming : Setting Sleep Reservation
You can easily turn-off(sleep) reservation.(ONLY enable when unit is operating.)
1
Press programming button to enter the
Programming mode. Press Programming
button repeatedly to select [sleep reservation]. (the segment flashing)
2
Press up, down button to adjust the reservation time.
3
If you finish the setting, press setting/cancel button to complete programming.
4
Press exit button to exit or system will automatically release without any
input after 25 seconds.
Hydro Kit Owner’s Manual 15
Owner's instruction
Programming : Setting ON Reservation
This function is able to turn-on after a setting time.
1
Press programming button to enter the
Programming mode. Press Programming button repeatedly to select [on reservation]. (the
segment flashing)
2
Press up, down button to adjust AM/PM.
3
Press right button to move to "Hour"
part. (the "Hour" segment will be
flashed)
4
Press up, down button to adjust the
Hour.
5
Press right button to move "Minute" part.
(the "Minute" segment will be flashed)
6
Press up, down button to adjust the
Minute.
7
If you finish the setting, press setting/cancel button to complete
programming.
8
Press exit button to exit or system will automatically release
without any input after 25 seconds.
16 Hydro Kit
Owner's instruction
Programming : Setting OFF Reservation
This function is able to turn-off after a setting time.
1
Press programming button to enter the
Programming mode. Press Programming button repeatedly to select [off reservation]. (the
segment flashing)
2
Press up, down button to adjust AM/PM.
3
Press right button to move to "Hour"
part. (the "Hour" segment will be
flashed)
4
Press up, down button to adjust the
Hour.
5
Press right button to move to "Minute"
part. (the "Minute" segment will be
flashed)
6
Press up, down button to adjust the
Minute.
7
If you finish the setting, press setting/cancel button to complete
programming.
8
Press exit button to exit or system will automatically release
without any input after 25 seconds.
Hydro Kit Owner’s Manual 17
Owner's instruction
Programming : Weekly Reservation
The weekly reservation is active after setting current time.
1
Press programming button to enter the
Programming mode. Press Programming button repeatedly to select [Weekly reservation].
(the segment flashing)
2
Press left, right button to adjust the current day.
3
Press up, down button to adjust the
action number.
4
Press right button to move to "Hour"
part on ON Time section.
(The "Hour" segment will be flashed)
Start Time Section
5
Press up, down button to adjust the
Hour on Start Time section.
6
Press right button to move to "Minute"
part on Start Time section.
(The "Minute" segment will be flashed)
7
Press up, down button to adjust the
Minute on Start Time section.
8
Press right button to move to "Hour" part
on OFF Time section.
(The "Hour" segment will be flashed)
Off Time Section
18 Hydro Kit
Owner's instruction
9
Please refer to the process from No.5 to
No.7 for setting OFF Time. It is the same
method.
10
If you finish the setting, press setting/cancel button to complete programming. The under bar segment
will be created, when finished.
11
Please refer to the process from
No.2 to No.10 for setting other day
weekly program. It is the same
method.
12
Press exit button to exit or system will automatically
release without any input after 25 seconds.
<Note>
Description of weekly reservation
<Start Time Section>
Action
Start Time
From
<Start Time Section>
<Off Time Section>
To
Off Time
<Off Time Section>
h Two actions per weekday can be programmed, in total 14 actions
Hydro Kit Owner’s Manual 19
Owner's instruction
Programming : Holiday Reservation
This function is to automatically stop the machine working on some days.
1
Press programming button to enter the
Programming mode. Press Programming
button repeatedly to select [Holiday reservation]. (the segment flashing)
2
Press left, right button to adjust the holiday.
3
When you press set/clear button after
finishing the selection, the day selected
will disappear.
4
Press exit button to exit or system will automatically release without any input
after 25 seconds.
20 Hydro Kit
Using Thermostat
Using Thermostat
The term "thermostat", which is widely used in this chapter, is a kind of 3rd party accessory.
LG Electronics does not supply thermostat. but it can be supplied by 3rd party manufacturers.
Room thermostat can be used for easy and convenience control. To utilize thermostat more efficiently and correctly, this chapter presents information about using thermostat.
CAUTION
1. Some electro-mechanical type thermostat has internal delay time to protect compressor.
In that case, mode change can takes time more than user's expectation. Please read thermostat manual carefully if the product does not response quickly.
2. Setting temperature range by thermostat can be different with that of the product. The heating set
temperature should be chosen within the setting temperature range of the product.
How to use Thermostat
To find how to turn on and off, how to set target temperature, how to change operating mode, etc,
please refer to thermostat operating manual provided by thermostat manufacturer.
Operating Thermostat with Remote Controller
• Following features are permitted when thermostat is installed :
•
SET TEMP button
•
VIEW TEMP button
•
Temperature adjust button (*)
•
Sanitary water heating Enable / Disable
(*) : The product does not turn on / off according to the setting temperature at the remote controller. It turns on / off according to the thermostat signal.
• Following features are NOT permitted when thermostat is installed :
•
Operating mode (Heating/ weather-dependent) selection
•
Time scheduling
•
Operation On / Off
Hydro Kit Owner’s Manual 21
Using Thermostat
Emergency Operation
• Definition of terms
- Trouble : a problem which can stop system operation, and can be resumed temporally under limited operation without certificated professional's assist.
- Error : problem which can stop system operation, and can be resumed ONLY after certificated
professional's check.
- Emergency mode : temporary heating operation while system met Trouble.
• Objective of introducing 'Trouble'
- Not like airconditioning product, Hydro kit is generally operated in whole winter season without
any system stopping.
- If system found some problem, which is not critical to system operating for yielding heating energy, the system can temporarily continue in emergency mode operation with end user's decision.
• Classified Trouble
- Trouble is classified into two levels according to the seriousness of the problem : Slight Trouble
and Heavy trouble
- Slight Trouble : a problem is found inside the indoor unit. In most case, this trouble is concerned
with sensor problems. The outdoor unit is operating under emergency mode operation condition
which is configured by DIP switch No. 4 of the indoor unit PCB.
- Heavy Trouble : a problem is found inside the outdoor unit.
- Option Trouble : a problem is found for option operation such as water tank heating. In this trouble, the troubled option is assumed as if It does not cause in the Product.
• Emergency operation level
- When system met trouble, it stops operation and waits for user’s decision : Calling service center
or starting emergency operation.
- To start emergency operation, user simply pushes ON / OFF button once more.
- Two different levels are prepared for emergency operation : High temperature cycle and low temperature cycle.
- In emergency operation mode, user can not adjust target temperature.
Dip Switch
(#4)
Target
Leaving Water
Temperature
Target
Room Air
Temperature
Target
Sanitary Water
Temperature
High temperature cycle
OFF
70℃(158℉)
24℃(75℉)
70℃(158℉)
Low temperature cycle
ON
50℃(122℉)
19℃(66℉)
50℃(122℉)
22 Hydro Kit
Using Thermostat
• Following features are permitted in emergency operation :
-
Operation On/Off
-
VIEW TEMP button(*)
-
Temperature adjust button (*)
-
Sanitary water heating Enable / Disable
(*) : Temperature measured by failed sensor is displayed as ‘- -’.
The product does not turn on / off according to the setting temperature at the remote controller.
It turns on / off according to the thermostat signal.
• Following features are NOT permitted in emergency operation :
-
Operating mode (Heating/ Weather-dependent) selection
-
Time scheduling
-
SET TEMP button
• Duplicated trouble : Option trouble with Slight or Heavy trouble
- If option trouble occurs with slight (or heavy) trouble at the same time, the system puts higher priority to slight (or heavy) trouble and operates as if slight (or heavy) trouble occurs.
- Therefore, sometimes sanitary water heating can be impossible in emergency operation mode.
When sanitary water is not warming up while emergency operation, please check if sanitary water
sensor and related wiring are all Ok.
• Emergency operation is not automatically restarted after main electricity power is reset.
- In normal condition, the product operating information is restored and automatically restarted
after main electricity power is reset.
- But in emergency operation, automatic re-start is prohibited to protect the product.
- Therefore, user must restart the product after power reset when emergency operation has been
running.
Hydro Kit Owner’s Manual 23
Maintenance and Service
Maintenance and Service
Maintenance activities
In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and
the field wiring have to be carried out at regular intervals, preferably yearly. This maintenance should
be carried out by your local agreed technician.
When the unit is not going....
CAUTION
• If the product is not used for long time, we strongly recommend NOT TO SWITCH OFF THE POWER SUPPLY to the
product.
• If power is not supplied, some special product-protecting
actions (such as water pump anti-locking) will not performed.
Call the service immediately in the following situations
1. Anything abnormal such as burning smell, loud noise etc. happen. Stop the unit and turn the
breaker off. Never try to repair by yourself or restart the system in such cases.
2. Main power cord is too hot or damaged.
3. Error code is generated by self diagnosis.
4. Water leaks from indoor unit.
5. Any switch, breaker (safety, earth) or fuse fails to work properly
User must carry routine checkup & cleaning to avoid unit’s poor performance.
In case of special situation, the job must be carried out by the only service person.
24 Hydro Kit
Management of plate-type heat exchanger
Management of plate-type heat exchanger
The efficiency of the plate-type heat exchanger will decrease, or the exchanger can be broken due
to freezing and bursting by the flux decrease, as much as scale formation is accumulated.
Because of these reasons, it is necessary to manage the exchanger periodically to avoid scale formation.
The following items should be checked before the season for use is started. (Interval: Once a year)
1. Analyze water to see if the standard condition is met or not.
2. Clean the strainer.
3. Check whether the flux is proper.
4. Check whether the operating environment is proper.
(Pressure, flow, water outlet temperature, etc.)
Follow the following procedure to clean the plate-type heat exchanger. (Interval: Once a year)
1. For chemical solvent cleaning, check if the water pipe is equipped with service port.
The proper chemical solution for scale cleaning includes formic acid with 5% dilution, citric acid,
oxalic acid, acetic acid, and phosphoric acid. Acetic acid, phosphoric acid, etc. is appropriate.
(※ Never use hydrochloric acid, sulfuric acid and nitric acid as they are corrosive.)
2. When cleaning, make sure to check whether the gate valve of water pipe inlet/outlet and valve of
water discharge pipe are firmly closed.
3. Connect the pipe for chemical solution cleaning through the service plug of the water pipe; and fill
the detergent in 50℃ ~ 60℃ in plate-type heat exchanger and circulate with a pump for 2 ~ 5
hours.
The circulation time depends on the detergent’s temperature or the degree of the scale formation.
Therefore, observe the color change of the chemical solution well to determine the circulation time
to remove scales.
4. After the solution circulation work, drain off all chemical solutions inside the plate-type heat
exchanger; and fill in 1 ~ 2% concentrated sodium hydroxide (NaOH) or sodium hydrogen carbonate NaHCO3 and circulate for 15 ~ 20 minutes to neutralize the heat exchanger.
5. After the neutralization work, wash the inside of the plate-type heat exchanger with clean water.
You can check whether the chemical solution has been successfully removed by measuring pH
concentration of water.
6. In case where other detergent that is available on the market is used, be sure to check in advance
whether it has any corrosive reaction with stainless or copper.
7. For more detail about chemical detergents for cleaning, get consultation from the expert in the
related field.
Hydro Kit Owner’s Manual 25
Management of plate-type heat exchanger
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the malfunction persists, please
contact your dealer.
Case
Explanation
• Have you made a mistake in timer operation?
Hydro Kit does not operate.
The room has a peculiar odor.
Hydro Kit does not operate for
about 3 minutes when restart.
Does not cool or heat effectively.
• Has the fuse blown or has the circuit breaker been tripped?
• Check that this is not a damp smell exuded by the walls, carpet,
furniture or cloth items in the room.
• This is the protector of the mechanism.
• Wait about three minutes and operation will begin.
• The room may have been very hot when the Hydro Kit was
first turned on. Allow time for it to cool down.
• Has the setting temperature been set incorrectly?
The unit operation is noisy.
• Refrigerant flow sound
- While the system is being started or stopping, sound from the
refrigerant flow may be heard.
• Sound for the indoor unit heat exchanger
- During the cooling operation, a sound may be heard from the
indoor unit heat exchanger due to water freezing or melting.
• Water noise
- During starting or stopping of the unit, noise can appear in
water piping
• During defrost
- Noise can appear in unit due to defrosting of water.
Steam is raised in outdoor unit.
• Steam from outdoor heat exchanger
- During defrosting operation, ice on the outdoor heat exchanger
is melted, resulting in making steam.
Remote controller display is faint,
or no display at all.
• Has the circuit breaker been tripped?
26 Hydro Kit
Hydro Kit Owner’s Manual 27
28 Hydro Kit
Download PDF