Nortek BDFC-2.8-AK User manual

Nortek Global HVAC, LLC



Owner's Manual
Heat Pump
Models:
BDFC-2.8(09)-AK BDFC-3.6(12)-AK
BDFC-5.0(18)-AK BDFC-7.1(24)-AK
BDFC-9.0(30)-AK BDFC-11.2(36)-AK
BDFC-12.5(42)-AK BDFC-14.0(48)-AK
zPlease read this owner’s manual carefully before operation and retain it for future reference
zSpecifications & illustrations subject to change without notice or incurring obligations
Multi Variable Heat Pump
Floor and Ceiling Type Indoor Unit

Preface
For correct installation and operation, please read all instructions carefully. Before reading the instructions,
please be aware of the following items:
WARNING
DANGER: Failure to comply may result in severe personal injury, property damage and/or
death.
CAUTION
CAUTION: Failure to comply may result in pers
onal injury and/or property damage.
NOTICE is used to address practices not related to personal injury.
WARNING
(1) Instructions for installation and use of this product are provided by the manufacturer.
(2) Installation must be performed in accordance with the requirements of NEC and CEC by authorized personnel only.
(3) For the safe operation of this unit, please read and follow the instructions carefully.
(4) During operation, total capacity of indoor units should not exceed the total capacity of outdoor units, otherwise, poor
cooling or heating performance may result.
(5) Direct operators or maintainers should keep this manual for future reference.
(6) If this unit fails to operate normally, please contact
a qualified contractor as soon as possible and provide the
following information:
1) Content on the nameplate (model number, cooling capacity, serial number and manufacture date.
2) Malfunction details (before and after the malfunction occurred).
(7) Each unit has been strictly tested and proved before shiment. In order to prevent units from being damaged or
malfunctioning
because of improper service, please do not disassemble the unit by yourself. If you need to
maintenance or service, please contact a qualified contractor.
(8)In standby mode, the unit will consume a little power for normal communication, preheating refrigerant, etc. When
the unit won’t be used for a long
period of time, turn off the power of the complete unit.
Power will need to be turned
back on 24 hours before the next time the air conditioner is used for warmup..
(9) Illustrations in this manual are for your reference only. Manuals are subject to change by manufacturer without prior
notice.
(10) Instructions are also be available online.
User Notice
●This appliance is not intended for use by persions (including children) with reduced physical, sensory or
mental capabilities or lack of experience and knowledge.
●DISPOSAL: Do not dispose this product as unsorted household waste. Please dispose or recyle
responsibly.
R410A(R32/125:50/50):2087.5

Contents
1 SAFETY PRECAUTIONS..................................................................................................................................... 1
2 PRODUCT INTRODUCTION................................................................................................................................ 2
2.1 NAMES OF KEY COMPONENTS........................................................................................................................... 2
2.2 RATED WORKING CONDITION ............................................................................................................................ 2
2.3 UNIT FUNCTIONS .............................................................................................................................................. 2
3 INSTALLATIONPREPARATION .......................................................................................................................... 3
3.1 STANDARD FITTINGS ......................................................................................................................................... 3
3.2 SELECTING A LOCATION FOR INSTALLATION ........................................................................................................ 3
3.3 REQUIREMENTS OF COMMUNICATION WIRE SELECTION ..................................................................................... 4
3.4 WIRING REQUIREMENT ..................................................................................................................................... 5
4 INSTALLATION INSTRUCTIONS ........................................................................................................................ 5
4.1 INDOOR UNIT INSTALLATION .............................................................................................................................. 5
4.2 REFRIGERANT PIPE CONNECTION ..................................................................................................................... 8
4.3 DRAINAGE PIPE INSTALLATION AND DRAINAGE SYSTEM TESTING........................................................................ 8
4.4 WIRED CONTROLLER INSTALLATION................................................................................................................. 11
5 WIRING WORK................................................................................................................................................... 11
5.1 CONNECTION OF WIRE AND PATCH BOARD TERMINAL ...................................................................................... 11
5.2 POWER CORD CONNECTION ........................................................................................................................... 12
5.3 CONNECTION OF COMMUNICATION WIRE BETWEEN INDOOR UNIT AND OUTDOOR UNIT (OR INDOOR UNIT) ......... 12
5.4 CONNECTION OF COMMUNICATION WIRE FOR WIRED CONTROLLER ................................................................. 13
5.5 CONNECTION OF WIRED CONTROLLER AND INDOOR UNITS NETWORK.............................................................. 14
6 ROUTINE MAINTENANCE ................................................................................................................................ 16
6.1 CLEANING OF FILTER ...................................................................................................................................... 16
6.2 PRESEASON MAINTENANCE ............................................................................................................................ 16
6.3 POST-SEASONAL MAINTENANCE ..................................................................................................................... 16
7 TABLE OF ERROR CODES FOR INDOOR UNIT............................................................................................. 16
8 TROUBLESHOOTING........................................................................................................................................ 17

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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1 Safety Precautions
WARNING
(1) Follow this instruction to complete the installation work. Please read this manual carefully before unit startup and
service.
(2)
Wire size of power cord should be sized correctly. The damaged power cord and connection wire shoul
d be replaced by
specialized cable.
(3) After connecting the power cord, please affix the electric box cover properly.
(4) Never fail to comply with the nitrogen charge requirements.Charge nitrogen when welding pipes.
(5) Never short-circuit or cancel the pressure switch to prevent unit damage.
(6) Connect the wired controller before energization; otherwise wired controller could be damaged.
(7) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant leakage,
electric shock, or fire etc..
(8) Do not insert fingers or objects into air outlet/inlet grille.
(9) Open the door and window and keep good ventilation in the room to avoid oxygen deficit when the gas/oil heating
equipment is used.
(10) Never start up or shut off the air conditioner by plugging or unplugging the power cord.
(11) Let the unit run for at least five minutes after startup; otherwise it will affect oil return of the compressor.
(12) Do not allow children operate this unit.
(13) Do not operate this unit with wet hands.
(14) Turn off the unit or cut off the power supply before cleaning, otherwise electric shock or injury may occur.
(15) Never spray or flush water towards unit, otherwise malfunction or electric shock may occur.
(16) Do not expose the unit to the wet or corrosive circumstances.
(17) Under cooling mode, please don't set the room temperature too low
. K
eep the temperature difference between indoor
and outdoor unit within 5°C (9°F).
(18) User is not allowed to repair
the unit. Faulty service may cause electric shock or fire. Please contact
a qualified service
technician for help.
(19) Before installation, please check if the power supply matches the requirements specified on the nameplate.
(20) Installation should be conducted by dealer or qualified personnel. Please do not attempt to install the unit yourself.
Faulty installation may result in water leakage, electric shock or fire etc..
(21) Be sure to use the appropriate accessories and parts to prevent the water leakage, electric shock and fire accidents.
(22) Make sure the unit can be
grounded properly and securely to avoid electric s
hock. Please do not connect the ground
wire to gas pipe, water pipe, lightning rod or telephone line.
(23) Connect power to the unit 8 hours before operation. Do not cut off the power when it will not be used for a short period
of time, i.e. overnight (to protect the compressor).
(24) If refrigerant leakage occurs during installation, please ventilate immediately. Toxic gas will resuslt if the refrigerant gas
meets spark or open flame.
(25) Volatile liquid, such as
paint thinner or gasoline will damage the unit appearance.Only use soft cloth with a little
mild
detergent to clean the outer casing of unit.
(26) If anything abnormal occurs (such as burning smell), please power off the unit and cut off the main power supply, and
then immediately contact a licensed contractor. If the problem persists, the unit might be damaged and lead to electric
shock or fire.

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2 Product Introduction
2.1 Names of Key Components
Fig.2.1
No.
ķĸĹĺĻ ļ
Name
Drainage
Pipe
Connection
Pipe
Air Inlet Grille (With Filter) Louver
Main
Unit
Display
board
2.2 Rated Working Condition
Indoor Side Condition Outdoor Side Condition
Dry Bulb Temp °C
(F)
Wet Bulb Temp °C
(F)
Dry Bulb Temp °C
(F)
Wet Bulb Temp °C
(F)
Rated Cooling 27(80.6) 19(66.2) 35(95.0) 24(75.2)
Rated Heating 20(68.0) 15(59.0) 7(44.6) 6(42.8)
2.3 Unit Functions
Unit Functions
Wired Controller
WRC1
(Optional)
Remote Controller
RC (Standard)
Operation Mode (Cooling, Heating, Fan,
Dehumidifying)
Fan Speed Adjustment
Temperature Adjustment
X-fan Function
Quiet Function
Sleep Function
Save Function
E-heater Function
Memory Function
Absence Function
Timer Function
Low Temp Dehumidify Function
Filter Cleaning Reminding Function
I Feel
Light Function
Swing
Note:
ķ√: included, X: not included.
ĸPlease refer to the user manual of Wired Controller or Remote Controller for more details.

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3 InstallationPreparation
Note: Product illustrations are for reference only. Please refer to the actual product. Unspecified measure
unit is mm/inch.
3.1 Standard Fittings
Please use the following provided accessories according to the requirement.
No.
Name
Appearance
Q’ty
Usage
1
Remote controller
1+2
To control the indoor unit
2
Special hut
1
To connect gas pipe
3
Special hut
1
To connect liquid pipe
4
M10X8 nut with washer
8
To be used with the suspension bolt for installing the unit.
5
Insulation
1
To insulate the gas pipe
6
Insulation
1
To insulate the liquid pipe
7
Paper pattern for installation
1
Locate the drill hole on ceiling or wall
8
Fastener
4
To fasten the sponge
3.2 Selecting a Location for Installation
(1) The supporting structure to be used must have a sufficient load carrying capacity to support the weight
of the unit.
(2) Drain pipe can drain water out easily.
(3) There is no obstacle near air inlet and air outlet that might impede good air circulation.
(4) There should be sufficient space around the unit for maintenance access. Please see diagram below.
(5) Keep the unit away from other heat sources, inflammable gas, and smoke.
(6) The indoor unit, outdoor unit, power cord and connection electric wire should be at least 1m (40 in.)
from television and radio. Electrical appliances may cause electromagnetic interference. (Strong
electronmagnetic field will require clearances more thatn 1 m (40 in.)

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Ceiling type
fig.3.2
(1) The unit shall be installed in accordance with national standards or local regulations.
(2) Only qualified personnel can carry out installation work, please contact with local dealer before installation.
(3) Do not connect power until all installation work is finished.
3.3 Requirements of Communication Wire Selection
Note:
If air conditioner is installed in or near a stong electromagnetic field, STP (shielded twisted pair)
communication cable must be used.
3.3.1 Selection of communication wire between indoor unit and wired controller
Fig.3.3.1
Wire type
Total length of
communication wire
between indoor unit
and wired controller
(m/yd)
Wire
diameter
(mm2)
Wire standard
Remark
Light/Common
PVC Jacket Soft
Wire
L≤250(273-
13/32)
2×0.75
2×1.25
IEC 60227-5
The total length of communication line should
not exceed 250m (850 feet)

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3.3.2 Selection of communication wire between Indoor Unit and Indoor Unit (Outdoor Unit )
Fig.3.3.2
Wire type
Total length of
communication wire
between indoor unit and
indoor unit(
outdoor unit)
(m/yd)
Wire diameter
(mm2) Wire standard Remark
Light/Common
PVC Jacket Soft
Wire
Lİ1000(1093-5/8) ı2h0.75
IEC 60227-5
If wire gauge is 2X1 mm2, then
it’s OK to increase the length of
communication line. But total
length should not exceed
1500m (4900 feet).
3.4 Wiring Requirement
Note:
ķThe circuit breaker and power cord specification listed above are based on max power (max current) of
the unit.
ĸThe power cord specification listed above is based on ambient temperature of 40°C (104°F)
ĹThe circuit breaker specification listed above is based on ambient temperature of 40°C (104°F). If the
working condition is different, please adjust it according to the circuit breaker specification sheet .
Dimension of power cord and capacity of air switch
Model
Power specification
MCA˄A˅
MOP˄A˅
BDFC-2.8(09)-AK
208~230V-1ph-60Hz
1
15
BDFC-3.6(12)-AK
1
15
BDFC-5.0(18)-AK
1
15
BDFC-7.1(24)-AK
1
15
BDFC-9.0(30)-AK
1
15
BDFC-11.2(36)-AK
1
15
BDFC-12.5(42)-AK
1
15
BDFC-14.0(48)-AK
1
15
4 Installation Instructions
4.1 Indoor Unit Installation
4.1.1 Dimensions

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Fig.4.1.2.1
Below are dimensions of A, B, C, etc. for different models:
Unit: mm/inch
Models: A B C D H
BDFC-2.8(09)-AK
1220
˄48˅
225
˄8-7/8˅
1158
˄45-5/8˅
280
˄11˅
700
˄27-1/2˅
BDFC-3.6(12)-AK
BDFC-5.0(18)-AK
BDFC-7.1(24)-AK
BDFC-9.0(30)-AK
1420
˄
55-15/16
˅
245
˄
9-5/8
˅
1354
˄
53-5/16
˅
280
˄
11
˅
700
˄
27-1/2
˅
BDFC-11.2(36)-AK
BDFC-12.5(42)-AK
BDFC-14.0(48)-AK
1700
˄66-15/16˅
245
˄9-5/8˅
1634
˄64-21/64˅
280
˄11˅
700
˄27-1/2˅
Models:
Drainage pipe
(Outer Diameter × wall thickness)
(mm/inch)
Outer diameter of connection pipe(mm/inch)
Liquid pipe Gas pipe
BDFC-2.8(09)-AK
φ17×1.75
φ11/16×1/16
6.35
˄
1/4
˅
9.52
˄
3/8
˅
BDFC-3.6(12)-AK 6.35˄1/4˅12.7˄1/2˅
BDFC-5.0(18)-AK 9.52˄3/8˅15.9˄5/8˅
BDFC-7.1(24)-AK
BDFC-9.0(30)-AK
9.52˄3/8˅15.9˄5/8˅
BDFC-11.2(36)-AK
BDFC-12.5(42)-AK
BDFC-14.0(48)-AK
9.52˄3/8˅15.9˄5/8˅
Note:
Installtion and mounting must be carried out by qualified personnel.
4.1.2 Suspend the indoor unit
(1) Determine the location of the hanger with the paper template, and then remove the paper template, as
shown in Fig. 4.1.2.1.left
Fig.4.1.2.1
(2) Insert the anchor bolts into the drilled holes, and drive the pins completely into the anchor bolts with a
hammer, as shown in Fig. 4.1.2.1 .
(3) Remove the right and left side panels. ,as shown in Fig 4.1.2.2.
(4) Put the hanger bolt into the clasp of the indoor unit and tighten screws on the hanger to prevent the
indoor unit from moving,as shown in Fig 4.1.2.2.
(5) Reinstall and tighten the right and left side panels,as shown in Fig 4.1.2.3.

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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(6) Adjust the height of the unit to make the drain pipe slope slightly downward so that the drainage will
become much smoother as shown in Fig. 4.1.2.3.
Floor type
Fig.4.1.2.2
Ceiling type
Fig.4.1.2.3
4.1.3 Leveling
The water level test must be done after installing the indoor unit to make sure the unit is level, as shown
below.
Note:
Adjust the height of the unit to make the drain pipe slope slightly downward so that the drainage will be
smooth.

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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Fig.4.1.3
4.2 Refrigerant Pipe Connection
(1) Align the flaring port of copper pipe with the center of screwed joint and then tighten the flaring nut by
hand as shown in Fig. 4.2.
(2) Tighten the flaring nut with torque wrench.
Fig.4.2
(3) Use pipe bender when bending the pipe. The bending angle should not be too small.
(4) Wrap the connection pipe and joint with sponge and secure firmly with tape.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drainage Pipe
(1) The drainage pipe should be as short as possible and the downward slope should be at least 1%~2%
in order to drain condensation water smoothly.
(2) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe joint.
(3) Install drainage pipe according to the following Fig. and wrap insulation around the drainage pipe.
Improper installation may lead to water leakage.
(4) Use normal hard PVC pipe for the drainage pipe. During connection, insert the end of PVC pipe into the
drainage hole and then tighten it with drainage hose and wire binder. Never connect the drainage hole
and drainage hose with glue.
(5) When the drainage pipelines are used for several units, the position of pipeline should be about 100mm
(4 inch) lower than the drainage port of each unit. In this case, larger pipes should be applied.
Fig.4.3.1.1

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 Connect the drainage pipe properly, as shown in Fig 4.3.1.2.
Fig.4.3.1.2
4.3.2 Drainage pipe installation
(1) The diameter of the drainage pipe should be the same or larger than the connection pipes (PVC pipe,
outside diameter 17mm (11/16inch), thickness≥1.75mm (1/16inch)).
(2) Keep drainage pipe as short as possible and sloping downwards at a gradient of at least 1% to prevent
forming air bubbles.
(3) Insert the drainage hose into drain socket, tighten the metal clamp securely.
(4) Warp the sealing pad over drain hose and metal clamp for heat insulation.
(5) Make sure to perform insulation work for all drainage piping in order to prevent any possible
condensation.
(6) Apply the suitable diameter for converging drainage pipe according to the operating capacity of the
unit,as show in Fig. 4.3.2.1.
Fig.4.3.2.1
ķ- T -drainage pipes assembled by T-shaped joints
(7) The horizontal pipe can’t be connected to vertical pipe in the same level; please select the connection
way as shown in following fig.
Fig. 4.3.2.2: Three-way connection of drainage pipe joints

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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Fig. 4.3.2.3: Connection of downspout elbow
Fig. 4.3.2.4: Inserting horizontal pipe connection
(8) Drain pipes should have a downward slope of at least 1%~2%. To prevent pipes from sagging, install
hanger bracket at intervals of 1000~1500mm˄39~59inch˅.
Fig.4.3.2.5
(9) Prepare the local piping at the connection point for the drain pipe, as shown in the installation drawings.
Fig.4.3.2.6
4.3.3 Test of Drainage System
(1) Please test drainage system after electric work is finished.Add approximately 1L (1 qt) purified water to
drain pan from air vent. Be carefule not to splash the water over the electrical components (e.g. water
pump. etc):
(2) During the test check the drainage joint for leakage.
(3) It’s strongly recommended to do the drain test before ceiling decoration.

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Ceiling type
Floor type
Fig.4.3.3
4.4 Wired Controller Installation
Wired controller is optional accessory. If wired controller is needed, please contact your local dealer and
install the wired controller according to the instruction manual.
Note:
Controller commissioning operation must be performed before first use for automatic addressing and other
settings. Please refer to the manual of ODU.
5 Wiring Work
Note:
ķ......Units must be grounded securely, or it may cause electric shock.
ĸ......Please carefully read the wiring diagram. Faulty wiring could cause malfunction or even damage the
unit.
Ĺ......The capacity of power supply must be sufficient and the sectional area of wires in the room should be
larger than 2.5mm2.
ĺ......The unit should be powered by independent circuit and specific socket.
Ļ......The wiring should have a dedicated power supply.
ļ......Install circuit breaker for branch circuit according to related regulations and electrical standards.
Ľ......Crimp terminal or single wire must be used for all wires.
ľ......Keep cable away from refrigerant piping, compressor and fan motor.
Ŀ......Do not change the wiring inside the unit.
ŀ......If there is strong electromagnetic interference around the unit, use shielded twisted pair line; the metal
shielded layer of twisted pair wire must be grounded to avoid electromagnetic interference.
䢈......The communication wires should be separated from power cord and connection wire between indoor
unit and outdoor unit.
䢉.......Adjust the static pressure via wired controller according to site conditions.
5.1 Connection of Wire and Patch Board Terminal
(1) Single wire connection (as shown in Fig. 5.1.1)
1) Strip about 25mm (1 in.) insulation of the wire end with stripping tool.

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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2) Remove the wiring screws on the patch board.
3) Shape the tail of wire into ring with needle nose pliers. Ring should match the size of the terminal
screw.
4) Use the screwdriver to tighten the terminal.
(2) Stranded wire connection (as shown in Fig. 5.1.2)
1) Strip about 10mm (3/8 in) insulation of the end of stranded wire with stripping tool.
2) Remove the wiring screws on patch board.
3) Insert the wire into the ring tongue terminal and tighten with crimping tool.
4) Use the screwdriver to tighten the terminal.
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5.2 Power Cord Connection
Note:
All indoor units must have dedicated power supply so that they can be powered ON/OFF at the same time.
For units with single-phase power supply.
1) Detach the electric box lid.
2) Lead the power cord through the wiring -holes.
3) Connect the power cord to terminal "L, N, ”.
4) Secure the power cord with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or indoor
unit)
For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Lead the Communication cable through the wiring holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board, as shown in Fig

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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5.3.1.
(4) Secure the communication cable with clamp of electric box.
(5) For more reliable communication, connect the terminal resistor to the most downstream IDU of the
communication bus (terminal D1 and D2), as shown in Fig. 5.3.2, a terminal resistor is provided with
each ODU.
5.4 Connection of Communication Wire for Wired Controller
(1) Open the electric box of the IDU.
(2) Lead the communication wire through the wiring holes.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
(4) Secure the communication wire with clamp on the electric box.
(5) Wiring instructions of signal receiver and wired controller.
Fig.5.4.1
(6) Both IDU and wired controller are equipped with signal receiver, and available for remote control
respectively.(Fig 5.4.2)

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5.5 Connection of Wired Controller and Indoor Units Network
(1) Communication wire of indoor unit to outdoor unit (or indoor unit) is connected to D1, D2.
(2) Wired controller is connected to H1, H2.
(3) One indoor unit can connect two wired controllers. One must be set as master one and one as slave.
(4) One wired controller can control 16 indoor units maximum at the same time. (as shown in Fig. 5.5)

Multi Variable Heat Pump Floor and Ceiling Type Indoor Unit
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Fig.5.5
(1) The indoor units must be the same type if they are controlled by a single wired controller.
(2) When the indoor unit is controlled by two wired controllers, the addresses of the two wired controllers should
have
different address setting. Address 1 is for main controller; Address 2 is for slave controller. Detailed setting
please refer to the instruction manual of wired controller.

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6 Routine Maintenance
(1)
Turn off the unit and cut off the main power supply when cleaning the air conditioner to
avoid electric shock or
injury.
(2) Use a ladder or other stable platform when cleaning the unit.
(3)
Do not clean the unit with hot water whose temperature is higher than 45°C (113°F) to prevent
fading or
warping.
(4) Do not dry the filters over open flame to avoid warping.
(5) Clean the filter with a damp cloth dipped in mild detergent.
(6) Please contact a qualified service technician if there is a malfunction.
6.1 Cleaning of Filter
(1) Remove the filters from inlet of IDU. Use a vacuum cleaner to remove dust. If the filters are dirty, wash
them with warm water and mild detergent. Dry the filters in the shade.
(2) If the unit is used in a very dusty environment , please clean it more frequently (about every two weeks).
6.2 Preseason Maintenance
(1) Check if the air inlet and air outlet of indoor and outdoor unit are blocked.
(2) Check if securely grounded.
(3) Check if all the power cords and communication cables are securely connected.
(4) Check if any error code displayed after turning on power.
6.3 Post-Seasonal Maintenance
(1) Set the unit in fan mode for half a day on a sunny day to dry the inner parts of unit;
(2) When the unit won’t be used for a long period of time, please turn off power supply to save energy. The
characters on the wired controller screen will disappear after turning off the power supply.
7 Table of Error Codes for Indoor Unit
Error
Code
Content
Error
Code
Content
Error
Code
Content
L0
Indoor Unit Error LA
Indoor Units Incompatibility
Error
dA
Indoor Unit Hardware Address
Error
L1
Indoor Fan Protection
LH Low Air Quality Warning dH Wired Controller PCB Error
L2
E-
heater Protection
LC
ODU
-
IDU Incompatibility Error
dC
Capacity DIP Switch Setting Error
L3
Water Full Protection
d1 Indoor Unit PCB Error dL
Outlet Air Temperature Sensor
Error
L4
Wired Controller Power
Supply Error
d3
Ambient Temperature Sensor
Error
dE Indoor Unit CO2
Sensor Error
L5
Freeze protection d4
Inlet Pipe Temperature Sensor
Error
db
Special Code: Field Debugging
Code
L7
No Master Indoor Unit
Error
d6
Outlet Pipe Temperature Sensor
Error
C0
Communication Error
L8
Power Insufficiency
Protection
d7 Humidity Sensor Error
AJ
Filter Cleaning Reminder
L9
Quantity Of Group
Control Indoor Units
Setting Error
d8
Water Temperature Sensor
Error d9
Jumper Cap Error

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8 Troubleshooting
The air conditioner should not be serviced by users. Faulty repair may cause electric shock or fire, so please
contact an authorized service center for professional service. Check the following before calling for service help.
Phenomenon
Troubleshooting
The unit won’t start up
ķ... Power supply is not connected
ĸ... Circuit breaker tripping caused by electrical short
Ĺ... Input voltage is too low
ĺ...Operation button is turned off
Ļ... Control loop malfunction
The unit
runs for a short while, then
stops
ķ... There is obstacle in front of the condenser
ĸ... Control loop malfunction
Ĺ... Set the unit in cooling mode when outdoor ambient temperature is highe
r than 43°C
(110°F)
Poor cooling effect
ķ... The filter is dirty
ĸ... Too heavy heat load of room(e.g. too many people)
Ĺ... Doors or windows are open
ĺ... Inlet or outlet of IDU are blocked
Ļ... Thermostat setting temperature is too high
ļ... Room temperature sensor malfunction.
Poor heating effect
ķ... The filter is dirty
ĸ... Doors or windows are open
Ĺ... Thermostat setting temperature is too low
ĺ... Refrigerant charge is low (e.g. refrigerant leakage)
Ļ... Outdoor ambient temperature is lower than -5°C (23°F)
ļ... Circuit control malfunction
Ind
oor fan doesn’t start up during
heating
ķ... Position of tube temperature sensor head is not suitable
ĸ... Tube temperature sensor head isn't inserted well
Ĺ... Wiring of tube temperature sensor head is broken
ĺ... Capacitor has a short
Note:
If air conditioner still fails to work normally after checking and handling as described above, please stop
using it immediately and contact local service center for assistance.