CH GWHD(30)ND3EO User manual

Models:
GWHD(30)ND3EO
GWHD(36)ND3EO
GWHD(42)ND3EO
MULTI
DUCTLESS INVERTER
HEAT PUMP
Installation manual
OUTDOOR UNIT

TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INDOOR UNITS COMBINATIONS . . . . . . . . . . .. . . . . . . . . . 3
PREFACE . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 4
PRODUCT INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PREPARATION BEFORE INSTALLATION . . . . . . . . . . . . . . . 8
INSTALLATION . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
THE CONDITIONS LISTED BELOW ARE NOT CLASSIFIED
INTO ERRORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 1 9
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .21

SAFETY CONSIDERATIONS
Installing, starting up, and servicing air--conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start--up, and service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning coils. All other operations should be performed by
trained service personnel.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use
care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or
cautions included in literature and attached to the unit. Consult
local building codes and National Electrical Code (NEC) for
special requirements. Recognize safety information. This is the
safety--alert symbol !!.When you see this symbol on the unit and
in instructions or manuals, be alert to the potential for personal
injury.Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
!WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1disconnect switch.
Lock out and tag switch with asuitable warning label.
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!WARNING
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.
SYSTEM REQUIREMENTS
Allow sufficient space for airflow and servicing unit. See
minimum required distances between unit and walls or
ceilings.
ence)
Power Wiring:
The main power is supplied to the outdoor unit. The field supplied
connecting cable from the outdoor unit to indoor unit consists of
three (3) wires and provides the power for the indoor unit. Two
wires are high voltage AC power and one is aground wire.
Consult your local building codes and the NEC (National
Electrical Code) or CEC (Canadian Electrical Code) for special
requirements.
All wires must be sized per NEC or CEC and local codes. Use
Electrical Data table MCA (minimum circuit amps) and MOCP
(maximum over current protection) to correctly size the wires and
the disconnect fuse or breakers respectively.
Per caution note, only copper conductors with aminimum 300 volt
rating and 2/64--inch thick insulation must be used.
Communication Wiring:
Aseparate shielded copper conductor only, with aminimum 300
volt rating and 2/64--inch thick insulation, must be used as the
communication wire from the outdoor unit to the indoor unit.
To minimize voltage drop of the control wire,
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
SWires should be sized based on NEC and local codes.
SUse copper conductors only with aminimum 300 volt
rating and 2/64 inch thick insulation.
2
To minimize voltage
drop, the factory recommended wire size is 14/3 stranded with a
ground. In special cases where there is high electrical interference,
please use a separate shielded 16GA stranded control wire.
Specifications are subject to change without notice.

3
INDOOR UNITS COMBINATIONS
Specifications are subject to change without notice.

Preface
Please carefully read the instructions in this manual before installation and operation.
(1) For personal safety, please follow the instructions provided in this manual.
(2) The total capacity of the indoor units , which run at the same time, can not exceed that of the
outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be poor.
Model 30K
Minimum number of
connectable indoor units 2 2 2
Maximum number of
connectable indoor units 4 5 5
Minimum capacity of
connectable indoor units 18KBtu 18KBtu 18KBtu
Maximum capacity of
connectable indoor units 42KBtu 48KBtu 51KBtu
(3) Switch the main power on eight hours before starting the unit to ensure a successful startup.
(4) It is normal for the indoor unit to run 20-70 seconds after the indoor unit receives the
signal to make full use of the after heat function for the next operation.
(5) When the running modes of the indoor and outdoor units conflict, the conflict appears on the
wired controller display in five seconds and then the indoor unit will stop.In this case, they revert to
the normal condition by synchronizing their running modes: the cooling mode is compatible with the
dehumidifying mode and the fan mode can work with any other mode. If the supply power fails when the
unit is running, the indoor unit sends the signal to the outdoor unit three minutes after power
recovery.
(6) Cautions for the Maintenance Personnel:
During maintenance, prior to the startup of the compress,ensure the heating belt
of the compressor has been powered for at least eight hours.
Once the compressor starts, it must work continuously for at least 30 minutes. If not, it may
be damaged.
³VWRS´
 ³V WDU W´
4
36K 42K
Specifications are subject to change without notice.

2 Product Introduction
The Multizone system adopts inverter compressor technology. According to change displacement of
compressor, stepless capacity regulation within range of 15%~120% can be realized. Various product lineup is
provided with capacity range from 30KBtu to 42KBtu, which can be widely used in a boarding house , a working area
and especially applicable in a location with a variable load change.
2.1 Name of Main Parts
ķ
ĸ
Ĺ
ĺ
Ļ
NO. ķĸĹĺĻ
Name Motor Fan Electric Box Gas valve assembly Liquid valve assembly
Fig1
5
Specifications are subject to change without notice.

2.2 Combinations for outdoor and indoor units
High Wall
Indoor Unit
Duct Type
Indoor Unit
Cassettle Type
Indoor Unit
Floor Console
Indoor Unit
Fig 2
See Fig.2 for combinations for outdoor and indoor units. For the multizone series air conditioning system, one
outdoor unit is able to drive up to five indoor units which can be cassette type, duct type, high wall or floor console
type. The outdoor unit will run as long as any one indoor unit receives the running command, and all indoor units
stop once the outdoor unit is turned off.
Table 1Energy Level and Capacity Code of the Indoor
6
Specifications are subject to change without notice.
Indoor Unit Nominal Unit Btuh Indoor Model Number Outdoor Model Number
9,000
GWH09QC-D3DNA1D/I
12,000
GWH12QC-D3DNA1D/I
18,000
GWH18QD-D3DNA1G/I
GTH(09)BA-D3DNA1A/I
GTH(12)BA-D3DNA1A/I
GTH(18)BA-D3DNA1A/I
GTH(24)BA-D3DNA1A/I
GFH(09)EA-D3DNA1A/I
GFH(12)EA-D3DNA1A/I
GFH(18)EA-D3DNA1A/I
GFH(21)EA-D3DNA1A/I
GFH(24)EA-D3DNA1A/I
GKH(12)BA-D3DNA2A/I
GKH(18)BA-D3DNA2A/I
GKH(24)BA-D3DNA1A/I
GEH(09)AA-D3DNA1C/I
GEH(12)AA-D3DNA1C/I
GEH(18)AA-D3DNA1C/I
High Wall
GWHD(30)ND3EO
GWHD(36)ND3EO
GWHD(42)ND3EO
Flooring ceiling
Duct type
Cassettle type
Console
09,000
12,000
18,000
24,000
09,000
12,000
18,000
21,000
24,000
12,000
18,000
24,000
09,000
12,000
18,000

2.3 Rated working condition
Table 2
Indoor side state Outdoor side state
Dry buib temp.Wet buib temp.Dry buib temp.Wet buib temp.
Rating cooling 80.06 66.92 95 75.02
Rating Heating 69.98 60.08 4743.00
NOTICE
1) The following listed cooling /heating capacity and noise is tested before shipping.
2) The parameters below are tested under a rated working condition. If there is any change to them, please refer to the
nameplate.
3) The heating capacity parameters of the heat pump indoor unit excludes the auxiliary electric heating power.
2.4 The range of production working temperature
7
Outdoor Unit
System size 30 36 42
Cooling Operating Range Outdoor Min - Max DB °F 0~118 0~118 0~118
Heating Operating Range Outdoor Min – Max DB °F -4~86 -4~86 -4~86
Specifications are subject to change without notice.
Table 3

3Preparation before Installation
3.1 Standard parts
Please use the following standard parts included with the air conditioning units.
Table 4
Outdoor Unit Parts
Number Name Pic ture Quantity Remark
1Owner's manual 1
2Tube connector
subassy 8
3.2Selecting the installation site
1) Install the unit in a location that can withstand the weight of the unit and make sure the unit does not
shake or fall off.
2) Never expose the unit to direct sunshine and rainfall. Install the unit at aplace
free of dust, typhoons and earthquakes.
3) Try to keep the unit away from combustible, inflammable and corrosive or exhaust gases.
4) Leave some space for heat exchanging and servising to guarantee the unit's normal operation.
5) Keep the indoor and outdoor units close to each other to shorten the pipe length and minimize
the number of pipe bends.
6) Never allow children to approach the unit and prevent them from touching the unit.
Figure 3 details the outdoor unit's required installation space when the outdoor unit is completely surrounded by walls.
78 3/4
19 2/3 19 2/3
78 3/4
unit:feet
Fig 3
8
Specifications are subject to change without notice.
1.64
6.56
6.56
1.64
1.64
1.64
3.28

3.3 Piping Connection
The maximum pipe length is shown in the following table. When the distance between units (piping length) is
out of the range listed below, normal operation of the unit can not be guaranteed.
Table 5
Model Connecting Pipe (inch) Max. Pipe length(ft) Max. Height Difference between Indoor
Un it and Outdoor Unit (ft)
Liqu id Gas
30K Ï1/4 3/8 229.6 When the outdoor unit is above,
the maximum height difference between
the indoor and outdoor units is up to 49.2ft.
When the indoor unit is above,
the maximum height difference between
the indoor and outdoor units is up to 49.2ft.
36K Ï1/4 Ï3/8 246.1
42KÏ1/4 Ï3/8 246.1
NOTICE
1) Us e water-proof ins ulating pipe.
2) Wall thickness of pipe: 0.019-0.039 inch; bearing pressure: 3.0MPa
3) The longer the connection pipe is, the more the cooling and heating capacity will decrease.
9
Specifications are subject to change without notice.
Outdoor Unit
System size 30 36 42
Piping
Min. Piping Length ft 9.84 9.84 9.84
Standard Piping Length ft 131.2 131.2 131.2
Max. outdoor-indoor height difference ft 49.2 49.2 49.2
Max. height distance between indoor and indoor ft 24.6 24.6 24.6
Max. height distance between indoor and outdoor and indoor ft 49.2 49.2 49.2
Max. height distance between indoor and outdoor and outdoor up ft 49.2 49.2 49.2
Max. equivalent piping outdoor to last indoor ft 82 82 82
Max. Piping Length with no additional refrigerant charge ft 131.2 131.2 131.2
Max. Piping Length ft 229.7 246 246
Additional refrigerant charge (between Standard – Max piping length) Oz/ft 0.2 0.2 0.2
Gas Pipe (size - connection type) in 3/8 3/8 3/8
Liquid Pipe (size - connection type) in 1/4 1/4 1/4
Refrige
rant
Refrigerant Type R-410A R-410A R-410A
Heat Pump Models Charge Amount Lbs 6.17 8.05 8.05

4Installation
4.1 Outline and dimension of the outdoor unit
30K
Outline dimension and mounting holes
Unit:inch
38 3/7
36 2/9
17 1/3
14 4/7
31
24
15 5/7
Fig 4
3338GJQG36---3
42K
Outline dimension and mounting holes
Fig 5
36K,
10
40
42 1/2
24 5/6
17 1/3
14 1/4
15 3/4
43 3/7
Unit:inch
Specifications are subject to change without notice.

4.2 Installation of the Connection Pipe
Connecting piping for the indoor unit and outdoor unit are in the manifold mode (see the figure below).
Fig 6
4.2.1 Piping between the Indoor and Outdoor Units
(1) If the liquid and gas stop valves,which have the sign A , B, C, D or E , have not been connected to the
indoor units, turn off the screw cap with the spanner airproof.
(2) Refer to Fig.7 for the appropriate amount of torque to tighten the screws.
(3) Point the flare end of the copper pipe at the screw and tighten the screw by hand.
(4) Next, tighten the screw with the torque wrench until it emits a sound (as shown in Fig.7).
(5) The bending degree of the pipe can not be too small; otherwise it will crack. Use a pipe tube
bender to bend the pipe.
(6) Wrap the exposed refrigerant pipe and the joints by sponge and then tighten them with the plastic tape.
Pipe Flare Nut
Spanner
Fid7
1) During the connection of the indoor unit and the refrigerant pipe, never pull the indoor unit joints forcefully,
otherwise the capillary or other pipes may crack, which would result in leakage.
2) The refrigerant pipe should be supported by brackets.Do not allow the unit to support the weight of the refrigerant pipe.
3) If the piping connection size of the outdoor unit does not match the piping connection size of the indoor unit, use the
piping connection dimension of the indoor unit. Use different-diameter joints which is installing on the place of
the piping connection to connect the indoor unit.
4) For the Free Match system, each pipe should be labeled to indicate which system it belongs to avoid mistaken
inaccurate piping.
4.2.2 Allowable pipe length and drop height among indoor and outdoor units
If the total refrigerant pipe length (liquid pipe) is shorter than that listed in the table below, no additional
refrigerant will be charged.
Table 6
Model
Total Liquid Pipe
Length (a+b+c+d+e) 131.2ft 131.2ft 131.2ft
Pipe
diameter
Thickness of
copper tube
Tightening
torque
ĭ1/4 inch 0315 inch 1122 ft·lbf
ĭ3/8 inch 0315 inch 2629 ft·lbf
ĭ1/2 inch 0315 inch 3337 ft·lbf
ĭ5/8 inch 0.0394 inch 4448 ft·lbf
36K42K
11
Specifications are subject to change without notice.
30K

Allow able Length and Height for the Refrigerant Pipe
Table 7
Allow able Va l u e
Fitting Pipe
30K
Total length (actual length) of fitting
pipe 229.6ft 246.1ft L1+L2+…+L M(M İ5)
Length of farthest fitting pipe (ft) 82ft 82ft LX˄X=1ˈ2ˈ3ˈ4,5˅
Height difference
between outdoor
unit and indoor unit
Outdoor unit at
upper 49.2ft 49.2ft H1
Outdoor unit at
low er 49.2ft 49.2ft H3
Height difference between indoor
units (m) 24.6ft 24.6ft H2
b
a
e
d
c
L4L3L2 L5L1
Outdoor unit
Height difference between indoor unit and outdoor unit H1
Height difference between
indoor units H2
Indoor unit
Indoor unit
Equivalent length of the farthest fitting pipe L
x
Fig 8
36K
42K
12
Total Pipe1/4 x 0.23 + Total Pipe3/8 x 0.58 ¨C 31 oz
If the calculation results in a negative number no addition refrigerant is required.
The maximum additional refrigerant is 28.2 oz regardless of the calculation
Specifications are subject to change without notice.

13
4.2.3Installation of the Refrigerant Pipe Protection Layer
The refrigerant refrigerant pipe should be insulat ed by the insulating material and p lastic tape to prevent
condensation and water leakage.
The joints of the indoor unit should be wrapped with the ins ulating material.Ensure there is no gap on the joint
of the indoor unit, as shown in Fig.9.
The thermal insulating layer is required to be wrapped at this part.
Thermal insulating pipe
No gap
Fig 9
After the pipe is protected, do not be nd it to form asmall an gle ; ot he rwis e it will crack or
bre ak.
(3)Wrap the Pipe with Tape˖
a. Bundle the refrigerant pipe and electric wire together with tape, and separate them from the drain pipe to
prevent the condensate water from overflowing.
b. Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the w all. During the
wrapping, the later circle should cover half of the former one.
c. Fix the wrapped pipe on the wall with clamps.
1) Do not wrap the pipe too tight; otherwise the insulation effect would be weakened.Ensure
drain hose is separated from the pipe.
2) Next, fill the hole on the wall with sealing material to prevent wind and rain from entering the room.
Specifications are subject to change without notice.
4.2.4Support and protection for the pipeline
Support should be made for hanging the connection pipe. The distance between each support can not exceed 3.3 ft (1m).

4.3 Air Purging and Refrigerant Charge
4.3.1 Air purging
(1) The refrigerant in the outdoor unit was charged before shipment. Additional refrigerant needs to
be charged into the refrigerant pipe during the f ie ld insta llat ion.
(2) Ensure the outdoor unit's liquid and gas valves are closed completely.
(3) As shown in the following figure (Fig.10), expel the gas inside the indoor unit and the refrigerant pipe with the
vacuum pump.
"LO"Knob "HI"Knob
Vacuum pump
high sidelow side
Connection hose
liquid valve
Gas valve
Fig 10
(4) When the compressor is not running, charge the R410A refrigerant into the refrigerant pipe from the liqu id
valve of the outdoor unit (do not charge from the gas valve).
4.3.2 Additional refrigerant charging
(1) Refrigerant Charge in the Outdoor Unit before Shipment
NOTICE
1) The outdoor unit has been charged with refrigerant prior to delivery. The refrigerant charge is not included and is
an additional charge for the indoor unit and the refrigerant pipe.
2) The amount of the additional refrigerant charge depends on the diameter and length of the liquid refrigerant
pipe which is determined by the actual yield installat ion requirement.
3) Record the additional refrigerant charge for future maintenance.
14
(2) Calc ulation of the Additional Refrigerant Charge
Additional Refrigerant Charge=
Length of Liqu id Pipe¶0.375×54+Length of Liqu id Pipe¶0.25×22)-880
The largest additional refrigerant charge value is 800g.This means if the calculated value exceeds800g, the
additional refrigerant charge takes 800g, w hile the calculated value takes les s than 800g, the additional refrigerant charge
takes the calculated value.
Specifications are subject to change without notice.

4.4 Electric Wiring
4.4.1 Wiring precautions
(1) The installation must be done in accordance with the national wiring regulations.
(2) The electric installation should be by technician instructed the local laws, regulations
and this manual.
(3) The ground should be rm and thegroundshould be connected to the dedicated device of the building
by the technician.The breakercoupled with the leakage current protection switch must be equipped and have
enough capacity in both themagnetic and thermal tripping functions in case of the short circuit and overload.
Table 8
Models Power Supply Capacity of the breaker A
208/230V~60Hz 30
208/230V~60Hz 30
208/230V~60Hz 30
30K
36K
42K
15
Specications are subject to change without notice.
GWHD(30)ND3EO
INDOOR UNIT D
INDOORUNIT C
INDOOR UNIT B
INDOORUNIT A
XT
3
N
(1
)
N
(1
)
X
T
4
N
(
1)
X
T2
X
T1
2
3
PE
X
T
N
(
1)
OUTDOOR UNIT
PO
W
ER
L
1
L
2
L
2
L
1
2
3
2
32
3
N
(1
)2
3
N
(
1
)
2
3N
(
1)
2
3
N
(1
)2
3
PE
P
E
P
EP
E
Fig 11
GND
GND GND GND GND
GND
GND
GND
GND
GND
GWHD(36)ND3EO、GWHD(42)ND3EO
Fig 12
INDOORUNIT D
INDOORUNIT C
INDOORUNIT B
INDOORUNIT A
XT3
N
(1)N
(1)
X
T4
N
(
1)
X
T2
X
T1
2
3
PE
XT
N
(1)
OUTDOOR UNIT
PO
W
E R
L
1
L
2
L
2
L
1
2
3
2
3
23
N
(1)
2
3N
(1)
23
N
(
1)
2
3
N
(1
)
23
PE
PE
P
EPE
XT5
N
(1)23
INDOORUNIT E
N
(1)2
3
PE
GND GND GND GND GND GND
GNDGND
GND
GND
GND
GND
!
Warning
!

4.4.2 Grounding Requirements
(1) The air conditioner is classified as a Class I appliance, so its grounding must be reliable.
(2) The yellow-green line of the air conditioner is the ground and can not be used for any other purpose, cut off or
fixed by the tapping screw; otherwise it would cause an electric shock.
(3) Areliable ground terminal should be provided and the ground wire can not be connected to any of the following
items:
ķRunning water pipe ĸCoal gas pipe ĹSewage pipe ĺOther places where the professional personnel
think unreliable.
4.4.3 Electrical Cable Connection
1) Amistake connecting the line w ill r es ult in a malfunc tion. After the elec tric al w iring is working, ensure
the wire between the connection place and the fixed place has a certain amount of space.
2) The connection piping and connection line of each indoor unit should connect well according to the instruction.
3) The electric installation should be carried out by a technician instructed in the local laws, regulations and
this manual.
4) The installation location should be dry, shielded from direct sunlight or strong winds.
5) Install a breaker in the circuit that can shut off the system's main power supply. Also install an breaker
coupled with the leakage current protection switch must be equipped.
4.4.4 Wiring of the Power Wire
(1). Open the side plate.
(2). Connect the power wire to terminals ĀL1ā,ĀL2āand the grounding screw.Next, connect the wiring
ter mina ls ĀN(1),2,3āof the indoor unit to the corresponding outdoor unit terminals.
(3). Fix the power wire w ith w ire c lips .
(4). Place the power wire through the rubber ring.
If the supply wire is damaged, it must be replaced by the manufacturer or its service agent or a similarly
qualified person to avoid a hazard.
16
Specifications are subject to change without notice.

5Troubleshooting
1) In the event of abnormal conditions (for example, a foul smell), shut off the main power supply immediat ely and
contact your Service Center.Operating under abnormal conditions would damage the
air conditioning unit and would cause electric shock or a fire hazard.
2) Do not attempt to repair the air conditioning.Contact a professionally skilled technician at the
appointed service center. An incorrect repair would cause electric shock or a fire hazard.
Check before Contacting Service Center.
Table 9
Check Items Conditions Might Happen Check
Has the unit been secured firmly? The unit may drop, shake or emit noise.
Hav e you done the gas leakage test? It may cause ins uf fic ient cooling/heating
capacity.
Does the unit have proper thermal insulation?
Itmay cause condensation and dripping.
Does the unit drain w ell? It may cause condensation and dripping.
Is the voltage in accordance with the
rated voltage specified on the nameplate?
It may cause a malfunction or damage the part.
Is the electric w iring and piping
connection installed correctly and
securely?
It may cause malfunction or damage the part.
Has the unit been grounded securely?It may cause electrical leakage.
Is the power cord specified? It may cause malfunction or damage the part.
Has the in let and outlet been blocked? It may cause ins uf fic ient cooling/heating
capacity.
NOTICE!
If the air conditioner still runs abnormally af te r the above checks,ple ase contact a
maintenance serviceman at the local appointed service center and provide adescription of the error
as we ll as the model of the unit.
17
Specifications are subject to change without notice.

18
Specifications are subject to change without notice.
15
6 The conditions listed below are not classified into errors.
Table 10
Conditions
Causes
The unit does not run
When restart the unit soon after it is
stopped.
The overload protection switch of the unit let the
startup delayed for three minutes.
As soon as power is on.
The unit will stand by for approximate one
minute.
The unit blows out mist
When the cooling operation starts.
The hi-humidity air indoor is cooled quickly.
The unit generates noise
The unit “clatters”as soonas it
starts running.
It is the sound generated during the initialization
of the electronic expansion valve.
The unit “swishes”during the
cooling operation.
It is the sound when the refrigerant gas runs inside
the unit.
The unit “swishes”when it is
started orstopped.
It is the sound when the refrigerant gas stops
running.
The unit “swishes”when it is in
and after the running.
It is the sound when the draining system is
operating.
The unit “squeaks”when it is in
and after the running.
It is the sound of frication generated by the skin
plate etc which swells due to the temperature
change.
The unit blows out dust.
When the unit restarts after it is not
used for a long time.
The dust inside the unit is blown out again.
The unit emits odors.
When the unit is running.
The odors absorbed in are blown out again.
NOTICE!
If problem can not be solved after checking the above items, please contact C&H service center and show
phenomena and models.
Following circumstance are not malfunction Table 11
Malfunction
Reason
Unit doesn’t run
When unit is started
immediately after it is just
turned off
Overload protection switch makes it run after 3 minutes
delay
When power is turned on
Standby operating for about 1 minute
Mist comes from the
unit
Under cooling
Indoor high humidity air is cooled rapidly
Noise is emitted
Slight cracking sound is heard
when just turned on
It is noise when electronic expansion valve initialization
There is consecutive sound
when cooling
That's sound for gas refrigerant flowing in unit
There is sound when unit starts
or stops
That's sound for gas refrigerant stops to flow
There is slight and consecutive
sound when unit is running or
after running
That's sound for operation of drainage system
Cracking sound is heardwhen
unit is operating and after
operating
That’s sound caused by expansion of panel and other
parts due to temperaturechange
The unit blows out
duct
When unit runs after no
operation for a long period
Dust in indoor unit is blew out
The unit emits odor
Operating
The room odor absorbed by the unit is blew out again
Indoor unit still runs
after switch off
After every indoor unit receive
"stop" signal, fan will keep
Indoor fan motorwill keep running 20-70s so as to take
good use of excess cooling and heating and prepare for

19
Specifications are subject to change without notice.
running
next operation
Mode conflict
COOL or HEAT mode can not
be operated
When the indoor operating mode conflicts with that of
outdoor unit, indoor fault indicator will flash and conflict
will be shown on the wired controller after 5 minutes.
Indoor unit stops to run and meanwhile change outdoor
operating mode as the same as that of indoor unit, then
the unit will go back to normal. COOL mode doesn't
conflict with DRY mode. FAN mode doesn't conflict with
any mode.