Haier 3U24GS1ERE User manual

4U36HS1ERE
3U24GS1ERE
INSTALLATION MANUAL
MULTI-SPLIT AIR CONDITIONER
Please read this manual carefully before installation
0150513284
Keep this operation manual or uture re erence.
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Contents
English
Safety Precautions
Accessories
Procedure for Selecting the
Location
Installation drawings of indoor and
outdoor units
Wiring connection
Outdoor Unit Installation Guideline
Limitations on the installation
Refrigerant piping work
Pump Down Operation
Wiring work
Test running
Trouble shooting

Your air conditioning product is marked with this
symbol This means that electrical and electronic
products shall not be mixed with unsorted
household waste Do not try to dismantle the
system yourself:the dismantling of the air
conditioning system,treatment of the refrigerant,of oil and of
other part must be done by a qualified installer in accordance
with relevant local and national legislation Air conditioners
must be treated at a specialized treatment facility for reuse,
recycling and recovery By ensuring this product is disposed
of correctly,you will help to prevent potential negative cons-
equences for the environment and humen health Please
contact the installer or local authority for more information
Battery must be removed from the remote controller and dis-
posed of separately in accordance with relevant local and
nationl legislation
DISPOSAL REQUIREMENTS:
This product contains fluorinated greenhouse gases covered
by the Kyoto Protocol Do not vent into the atmosphere
Refrigerant type:R410A
GWP*value:1975
GWP = Global Warming Potential
Please fill in with legible ink
1 The factory refrigerant charge of the product
2 The additional refrigerant charge of the product
1+2 the total refrigerant charge
on the refrigerant charge label supplied with the product
The filled out label muset be adhered in the proximity of the
product charging port(e g onto the inside of the stop value
cover)
A contains fluorinated greenhouse gases covered by the
Kyoto Protocol
B fatory refrigerant charge of the product:see unit name
plate
C additional refrigerant amount charged in the field
D total refrigerant charge
E outdoor unit
F refrigerant cylinder and manifold for charging
IMPORTANT INFORMATION REGA-
RDING THE REFRIGERANT USED
1356 Broadway, New York, NY 10018

3
Sa ety Precautions
WARNING
CAUTION
WARNING
CAUTION
Read these Safety Precautions carefully to ensure correct installation
This manual classifies the precautions into WARNING and CAUTION
Be sure to follow all the precautions bellow: they are all important for ensuring safety
Failure to follow any of WARING is likely to result in such grave consequences as death or serious injury
Failure to follow any of CAUTION may in some cases result in grave consequences
The following safety symbols are used throughout this manual:
Be sure to observe this instruction Be sure to establish an earth connection Never attempt
After completing installation, test the unit to check for installation errors Give the user adequate instructions concerning the use and cleaning
of the unit according to the Operation Manual
Installation should be left to the dealer or another professional
Improper installation may cause water leakage, electrical shock, or fire
Install the air conditioner according to the instructions given in this manual
Incomplete installation may cause water leakage, electrical shock, or fire
Be sure to use the suplied or specified installation parts
Use of other parts may cause the unit to come lose, water leakage, electrical shock, or fire
Install the air conditioner on a solid base that can support the unit's weight
An inadequate base or incomplete installation may cause injury in the event the unit falls off the base
Electrical work should be carried out in accordance with the installation manual and the national electrical wiring rules or code of practice
Insufficient capacity or incomplete electrical work may cause electrical shock or fire
Be sure to use a dedicated power circuit Never use a power supply shared by another appliance
For wiring, use a cable long enough to cover the entire distance with no connection
Do not use an extension cord Do not put other loads on the power supply, use a dedicated power circuit
(Failure to do so may cause abnormal heat, electric shock or fire )
Use the specified types of wires for electrical connections between the indoor and outdoor units
Firmly clamp the interconnecting wires so their terminals terminals receive no external stresses Incomplete connections or clamping may cause terminal overheating or fire
After connectiong interconnecting and supply wiring be sure to shape the cables so that they do not put undue force on the electrical
covers or panels
Install covers over the wires Incomplete cover installation may cause terminal overheating, electrical shock, or fire
If any refrigerant has leaked out during the installation work, ventilate the room
(The refrigerant produces a toxic gas if exposed to flames )
After all installation is complete, check to make sure that no refrigerant is leaking out
(The refrigerant produces a toxic gas if exposed to flames )
When installing or relocating the system, be sure to keep the refrigerant circuit free from substances other than the specified
refrigerant(R410A), such as air
(Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture, resulting in injury )
During pump-down, stop the compressor before removing the refrigerant piping
If the compressor is still running and the stop valve is open during pump-down, air will be sucked in while the compressor is running, causing abnormal pressure and no
condense-able added to the system
Be sure to establish a ground Do not ground the unit to a utility pipe, arrester, or telephone earth
In complete earth may cause electrical shock, or fire A high surge current from lightning or other sources may cause damage to the air conditioner
Do not install the air conditioner in a place where there is danger of exposure to inflammable gas leakage
If the gas leaks and builds up around the unit, it may catch fire
Establish drain piping according to the instructions of this manual
Inadequate piping may cause flooding
Tighten the flare nut according to the specified method such as with a torque wrench
If the flare nut is tightened too hard, the flare nut may crack after a long time and cause refrigerant leakage
Make sure to provide for adequate measures in order to prevent that the outdoor unit be used as a shelter by small animals
Small animals making contact with electrical parts can cause malfunctions, smoke or fire Please instruct the customer to keep the area around the unit clean

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Accessories
Procedure or Selecting the Location
NOTE:
No
1
2
3
Quantity
1
4
Name of parts
Drainage elbow
Rubber cushion
Clap
Drawing
1
1
Note
3
Adaptor(3/8 1/2)
Adaptor(1/2 3/8)
1
3
Accessories supplied with the outdoor unit:
1) Choose a place solid enough to bear the weight and vibration of the unit, where the operation noise will not be amplified
2) Choose a location where the hot air discharged from the unit or the operation noise, will not cause a nuisance to the neighbors of the
user
3) Avoid places near a bedroom and the like, so that the operation noise will cause no trouble
4) There must be sufficient space for carrying the unit into and out of the site
5) There must be sufficient space for air passage and no obstructions around the air inlet and the air outlet
6) The site must be free from the possibility of flammable gas leakage in a nearby place
Locate the unit so that the noise and the discharged hot air will not annoy the neighbors
7) Install units, power cords and inter-unit cables at least 10ft away from television and radio sets This is to prevent interference to images
and sounds (Noises may be heard even if they are more than 10ft away depending on radio wave conditions )
8) In coastal areas or other places with salty atmosphere of sulfate gas, corrosion may shorten the life of the air conditioner
9)Since drain flows out of the outdoor unit, do not place under the unit anything which must be kept away from moisture
Cannot be installed hanging from ceiling or stacked
3U24GS1ERE
4U36HS1ERE
3U24GS1ERE
4U36HS1ERE
3U24GS1ERE
4U36HS1ERE
3U24GS1ERE
4U36HS1ERE
4U36HS1ERE

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Installation figure please refers to 4U36HS1ERE
1 Connect indoor and outdoor piping when installing unit Do not leave piping connected to only one unit
2 You must connect 2 units, minimum
Installation drawings o indoor and outdoor units
If there is the danger of the unit falling or overturning, fix the unit with foundation bolts, or with wire or other means
If the location does not have good drainage, place the unit on a level mounting base(or a plastic pedestal)
Install the outdoor unit in a level position Failure to do so may result in water leakage or accumulation
Arrangement of piping directions
Rear left
Rear right
Right
Below
Left
Wrap the insulation pipe with the finishing tape
from bottom to top
Cut thermal insulation pipe to an appropriate
length and wrap it with tape, making sure that no
gap is left in the insulation pipe's cut line
more than 10cm
more than10cm
more than 60cm
more than 25 cm
(4 in)
(4 in)
(24 in)
(10 in)
More than 15cm
More than 10cm
Attention must be
paid to the rising
up of drain hose
More than
10cm
(6 in)
(4 in)
(4 in)

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Installation drawings o indoor and outdoor units
*MUST CONNECT (2) INDOOR UNITS
Connection cautions
model 3U24GS1ERE 4U36HS1ERE
connection priority between indoor and
stop valve higher from down to up
when there is 1 indoor,the prior stop
valve is
when there are 2 indoors,the prior
stop valves are
when there are 3 indoors,the prior
stop valves are
when there are 4 indoors,the prior
stop valves are
Note: For better oil return and more reliable system, please execute as the above when connecting indoor unit
C
C B
C B A
D
D C
D C B
D C B A

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Wiring connection
1PH, 208/230V,60Hz
4U36HS1ERE
Central Controller
Power Supply:
Connect the connecting wires between indoor and outdoor units and ensure the sequence numbers on terminals match with each other
Power Supply Cable: 10AWG
Connecting Cable: 14AWG
Connecting Cable: 14AWG
3U24GS1ERE
ABC
Indoor Unit A Indoor Unit B Indoor Unit C
OUTDOOR
INDOOR
OUTDOOR
INDOOR
1PH, 208/230V,60Hz
Central Controller
Power Supply:
Indoor Unit A Indoor Unit B Indoor Unit C Indoor Unit D
ABC D

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Piping to each indoor unit
Total length of piping between al lunits
Outdoor unit capacity class
70m max (227ft )
25m max (82ft )
60m max (197ft )
3U24GS1ERE
25m max (82ft )
4U36HS1ERE
Outdoor Unit Installation Guideline
Where a wall or other obstacle is in the path of outdoor unit's intake or exhaust airflow, follow the installation guidelines below
For any of the below installation pattems, the wall height on the exhaust side should be 1200mm(47 in ) or less
Limitations on the installation
2.Selecting a location or installation o the indoor units
The maxinum allowable length of refrigerant piping, and the maxmum allowable height difference between the outdoor and indoor units,
are listed below (The shorter the refrigerant piping, the better the performance Connect so that the piping is as short as possible Shortest
allowable length per room is 3m (10ft ))
1.Precautions on installation
Check the strength and level of the installation ground so that unit will not cause any operating vibration or noise after installation
In accordance with the foundation drawing in fix the unit securely by means of the foundation bolts
It is best to screw in the foundation bolts unit their length are 20 mm(3/4 in ) from the foundation surface
More than 50(2 in ) More than 300(12 in )
1200
(47 in )
or less
Side view
Wall acing one side (mm)
More
than 100
(4 in )
More
than 100(4 in ) More
than 50
(2 in )
More
than 300
(12 in )
Side view
Wall acing two sides
More than 150
(6 in )
More
than 50
(2 in )
More than 300(12 in )
Side view
Wall acing three sides
20 mm
(3/4 in)

3U24GS1ERE 4U36HS1ERE
9
Re rigerant piping work
1. Installing outdoor unit
1) When installing the outdoor unit, refer to "Precautions for Selecting the Location" and the "Indoor/Outdoor Unit Installation Drawings"
2)If drain work is necessary, follow the procedures below
2. Drain work
1) Use drain plug for drainage
2) If the drain port is covered by a mounting base or floor surface, place additional foot bases of at least 30mm(1 1/6in) in height under
the outdoor unit's feet
3) In cold areas, do not use a drain hose with the outdoor unit (Otherwise, drain water may freeze, impairing heating performance )
Drain elbow
Hose
Drain elbow
Hose
Indoor Unit
Outdoor Unit
Level
difference:
15m max Level
difference:
7 5m max
If the outdoor unit is positioned higher than the indoor units
Outdoor Unit
Indoor Unit
Level
difference:
15m max
Level
difference:
7 5m max
If the outdoor unit is positioned higher than the indoor units
(If lower than one or more indoor units )
Limitations on the installation
(50ft )
(22 8ft )
(50ft )
(22 8ft )
(50ft )
(22 8ft )

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4. Purging air and checking gas leakage
WARNING
3. Re rigerant piping work
When piping work is completed, it is necessary to purge the air and check for gas leakage
1) Do not mix any substance other than the specified refrigerant (R410A) into the refrigeration cycle
2) When refrigerant gas leaks occur, ventilate the room as soon and as much as possible
3) R410A, as well as other refrigerants, should always be recovered and never be released directly into the environment
4) Use a vacuum pump for R410A exclusively Using the same vacuum pump for different refrigerents may damage the vacuun pump or
the unit Pull vacuum down to 300 microns
Use a hexagonal wrench (3/19") to operate the stop valve rod
All refrigerant pipe joints should be tightened with a torque wrench at the specified tightening torque
Connect projection side of charging hose(Which comes from gauge manifold) to gas stop valve's service port
Fully open gauge manifold's low-pressure valve(Lo) and completely close its high-pressure valve(Hi)
(High-pressure valve subsequently requires no operation )
Apply vacuum pumping Check that the compound pressure gauge reads-30 PSI
Evacuation for at least 30 minutes
Close gauge manifold's low-pressure valve(Lo) and stop vacuum pump
(Leave as is for 4-5 minutes and make sure gauge doesn't move If it doesgo up,this indicates the presence of moisture or leaking from
connecting parts After inspecting all the connection and loosening then retightening thenuts, reqeat steps 2-4 )
Remove covers from liquid stop valve and gas stop valve
Turn the liquid stop valve's rod 90 degrees counterclockwise with a hexagonal wrench to open valve
Close it after 5 seconds, and check for gas leakage
Using soapy water, check for gas leakage from indoor unit's flare and outdoor unit's flare and valve rods
After the check is complete, wipe all soapy water off
Disconnect charging hose from gas stop valve's service port, then fully open liquid and gas stop valves
(Do not attempt to turn valve rodj beyond its stop )
Tighten valve caps and service port caps for the liquid and gas stop valves with a torque wrench at the specified torques See "3
Refrigerant piping " on page 6 for details
Re rigerant piping work
2)To prevent gas leakage, apply refrigeration oil on both inner and outer surfaces of the flare (Use refrigeration oil for R410A)
Torque spanner
Spanner
Pipe joint
Cone nut
10 8-14 7N m(96-130lb in)
Valve cap tightening torque
Liquid pipe 26 5-32 3N m(235-286lb in)
Gas pipe 48 1-59 7N m(426-528lb in)
Service port cap tightening torque
Coat here with refrigeration oil
1) Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand Then tighten them fully with the tor wrenches
Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas
Flare nut fightening torque
14 2-17 2N m(126-152lb in)
32 7-39 9N m(289-353lb in)
49 5-60 3N m(438-534lb in)
61 8-75 4N m(547-667lb in)
Flare nut for 6 35 (1/4")
Flare nut for 9 52 (3/8")
Flare nut for 12 7 (1/2")
Flare nut for 15 88 (5/8")

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5. Re illing the re rigerant
6. Charging with re rigerant
Notes:
Gas pipe Gas pipe insulation
O D :9 52mm (3/8"),12 7mm(1/2")
Thickness:0 8mm(3/95")
I D :12-15mm(1/2"-3/5"),12 7mm(1/2")
Thickness:13mm (1/2")min
Liquid pipe Liquid pipe insulation
O D :6 35mm(1/4")
Thickness:0 8mm(3/95")
I D :8-10mm (6/19"-2/5")
Thickness:10mm(2/5") min
7.Precautions or Running Re rigerant Piping
Cautions on pipe handling
1) Protect the open end of the pipe against dust and moisture
2) All pipe bends should be as gentle as possible Use a pipe bender for bending (Bending radius should be 30 to 40mm (1 1/4" to
1 3/4")or larger )
Selection o copper and heat insulation materials
When using commercial copper pipes and fittings, observe the following :
1) Insulation material: Polyethylene foam
Heat transfer rate: 0 041 to 0 052W/mK(0 035to 0 045kcal/mhoC)
Refrigerant gas pipe's surface temperature reaches 230oF max
Choose heat insulation materials that will withstand this temperature
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below
Check the type of refrigerant to be used on the machine namiplate
Precautions when adding R410A
Fill rom the liquid pipe in liquid orm.
It is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal operation
1) Before filling, check whether the cylinder has a siphon attached or not (It should have something like "liquid filling siphon attached"
displayed on it )
2) Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering
1) This system must use refrigersant R410A
2) Add refrigerant 0 21 oz per foot when the total piping length
exceeds the standard value, but make sure that the total liquid
piping length should be less than the max value
1) When using this product, you need not to set the address But the L/N wires between indoor & outdoor units must be corresponded,
or there will be communication failure
2) Quiet Operation Setting Set the DIP "8" to ON position of SW5, the system will run with lower noise, but the max capacity will also
reduce slightly
3) Do not change the settings of other switchs, wrong settings can make the system damage or other malfunctions
Re rigerant piping work
Filling a cylinder with an attached siphon
Stand the cylinder upright when filling
There is a siphon pipe inside, so the
cylinder need not be upside-down
to fill with liquid
Filling other cylinders
Turn the cylinder upside-down
when filing
3U24GS1ERE 30m (98ft ) 60m (197ft )
4U36HS1ERE 40m (131ft ) 70m (227ft )

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8.Cutting and Flaring work o piping
Pipe cutting is carried out with a pipe cutter and burs must be
removed
After inserting the flare nut, flaring work is carried out
Re rigerant Piping Work
WARNING
3) Use separate thermal insulation pipes for gas and liquid refrigerant
pipe
It becomes high
midway
The end is immersed
in water It waves
Less than
5cm(2 in )
It gap with the ground its
too small
There is the bad
smell from a ditch
Please pour water in the drain pan of the indoor unit, and confirm that drainage is carried out serely to outdoor
In case that the attached drain hose is in a room, please apply heat insulation to it without fail
9. On drainage
Please install the drain hose so as to be downward slope without fail Please don't do the drainage as shown below
Correct Incorrect
Lean Damage of flare Crack Partial Too outside
1) Do not use mineral oil on flared part
2) Prevent mineral oil from getting into the system as this would educe the lifetime of the units
3) Never use piping which has been used for previous installations Only use parts which are delivered with the unit
4) Do not install a filter dryer
5) The drying material may dissolve and damage the system
6) A bad flare may cause refrigerant gas to leak
Cut exactly at right
angles
Remove burrs
Flare's inner
surface must be
flaw-free
The pipe end
must be evenly
flared in a perfect
circle
Make sure that the
flare nut is tight
Check
A
Flare tooling die
Pipe diameter Size A (mm)
Liquid side
Gas side
6 35(1/4")
9 52mm(3/8")
0 8~1 5(3/16"~11/16")
1 0~1 5(3/16"~11/16")
12 7mm(1/2")
Pipe
Be sure to
place a cap
If no flare cap is
available, cover the
flare mouth with tape
to keep dirt or water
out
Rain
Wall
Inter unit wiring
Gas pipe
Gas pipe
insulation
Finishing tape Drain hose
Liquid pipe
insulation
Liquid pipe
A
Flare tooling die
Set exactly at the position shown below
Flare tool for R410A
Clutch-type
0-0 5mm (0-1/51")
Conventional flare tool
Clutch-type(Rigid-type)
1 0-1 5mm(3/16"-1/16")
Wing-nuttype(Imperial-type)
1 5-2 0mm(1/16"-1/8")
(mm)
1 0~1 5(3/16"~11/16")

13
1. Electric wiring
The air conditioner must use special circuit , and wiring must be performed by the qualified electrician according to the wiring rules specified
in local standard
The grounding wire and the neutral wire shall be strictly separated Connect the neutral wire with grounding wire is incorrect
The electric leakage breaker must be installed
All the electric wire must be copper wire Power supply: 1PH, 208/230V, 60Hz
The wiring method of power line is Y connection If the power line is damaged, in order to avoid risk of electric shock, it must be replaced
by the manufacturer or its repair center or other similar qualified person
Fuse: T3 15A 250VAC(Electronic control unit) T25A 250VAC(Power circuit board)
Please check the circuit diagram about the fuse replaced
Wiring method of orbicular terminals
For the connection wire with orbicular terminals, its wiring method is as shown in
the right figure: remove the connecting screw, put the screw through the ring on
the end of the wire, then connect to the terminal block and fasten screw
Wiring method of straight terminals.
Crimp connection method for wires without terminals
For the connection wire without orbicular terminals, its wiring method is: loosen
the connection screw, and insert the end of the connection wire completely into
the Terminal block, then fasten the screw
Slightly pull the wire outwards to confirm it is firmly held
Note: Power line and communication wire are provided by installers themselves.
Pump Down Operation
liquid
stop valve
Gas
stop valve
Valve cap
Hexagonal
wernch
Close
In order to protect the environment, be sure to pump down when relocating or disposing o the unit.
1) Remove the valve caps from liquid stop valve and gas stop valve
2) Carry out forced cooling operation
3) After five to ten minutes, close the liquid stop valve with a hexagonal wrench
4) After two to three minutes, close the gas stop valve and stop forced cooling
operation
Crimp connection method for connection wire
After connection,the wire must be fastened by wire cover The wire cover shall press on the protection
coat of the connection wire,as shown in right top figure
Note:When connecting the wiring,confirm the terminal number of indoor and outdoor units carefully
Incorrect wiring will damage the controller of air conditioner or the unit can not operate
3. Wiring method o outdoor unit:
Power line
Remove the repair board of the outdoor unit and loosen the wire cover A,then put the live wire, neutral wire and grounding wire through
the wire cover ,and connect them to terminal block correspon dingly After connection, fasten wire cover to its previous state
Communication wire of indoor unit
Loosen wire cover , put the communication wire through the wire cover B, and connect them to terminal block correspondingly After
connection, fasten wire cover B to its previous state
2. Wiring method
Wiring Method for
Ring Terminal Block
Connect the wire with
same diameter to the
two sides of the terminal
Do not connect the
wire with same diameter
to the same side
Do not connect the
wire with different
diameters
Wiring work
Correct Pressing Wrong Pressing
Terminal
block
Pressing
Clamps

14
Wiring diagram please refers to 4U36HS1ERE
Loosen wire cover and connect the power line and communication wire of indoor unit to the terminal correspondingly
Note:
When connecting power line to power supply terminal, please pay attention to the ollowing items:
Do not connect the power line with different dimensions to the same connection wire end
Improper contact will cause heat generation
Do not connect the power line with different dimensions to the same grounding wire end
Improper contact will affect protection
Do not connect the power line to the connecting end of communication wire
Incorrect connection will cause damage to the connected unit
4. Wiring method o indoor unit
Wiring work
5. Example wiring diagram.
–¨25.4 00
YCZ-G001
L1 L2

15
Switch on all the 4 dip-switches on the outdoor unit small service PC-board as shown on the right Then power
off the unit and power on again, the system will enter the operation of "Wiring Error Check" After 3 minutes
stand-by, the unit starts for automatic wiring checking
Approximately 30 ~ 50minutes (depends on how many units installed in the system) after the unit starts, the
Errors of the wiring will be shown by the LEDs (1 to 5)
Before starting the test running, please confirm the following works have been done successfully
1) Correct piping work;
2) Correct wiring work;
3) Correct match of indoor and outdoor unit;
4) Proper recharge of refrigerant if needed
Make sure that all the stop valves are fully open
Check the voltage supplied to the outdoor and indoor units, please cinfirm that is 208/230V
Test running
Test running
1) If the temperature is lower than 60 OF, it is impossible to test cooling with remote controller, and also when the temperature is higher than
80 OF, it is impossible to test heating
2) To test cooling, set the lowest temperature at 60 OF To test heating,set the highest temperature, at 86 OF
3) Please check both cooling and heating operation of each unit individually and then also check the simultaneous operation of all indoor
units
4) After ruuning the unit for about 20 minutes, check the indoor unit outlet temperature
5) After the unit is stopped, or working mode changed, the system will not start again for about 3 minutes
6) During cooling operation, frost may ocur on the indoor unit or pipes, this is normal
7) Operate the unit according to the operation manual Please kindly explain to our customers how to operate through the instruction manual
ON
4321
CN2 CN3
CN1
CN4
SW1
4321 5
Seven-segment numeric display
1) When unit is runing, this seven-segment numeric will display the frequency of compressor For
example," " means compressor running frequency is 40 Hz, " " means compressor running
frequency is 108Hz
2) When a fault happens, seven-segment numeric will flash and display some numbers, this number is
failure code For example, a flashing " " means No 32 failure, that is indoor and outdoor communication
error
Communication LED
5 green LED means 5 indoor units If one LED keep lighting that means the corresponding indoor unit has good communication with outdoor
unit If one LED is not lighting, that means there is no communication between indoor and outdoor
Wiring Error Check
This product is capable of automatic checking of wiring error
ON
4321
CN2 CN3
CN1
CN4
SW1
4321 5
During this operation, the digital-number will alternately show the compressor working frequency (e g 50 stands for the current running
frequency) and letter "CH"(means checking)
After this operation, if all the wiring is correct, the digital-number will show "0", if there has wrong wiring, the digital-number will show "EC"(error
connection) and also it will flashing
The service monitor LEDs indicate the error of wiring, as shown in the table below For details about how to read the LED display, refer to
the service manual
If self-checking is not possible, check the indoor unit wiring and piping in the usual manner
Status
Only one LED flashing
LED 1234 5
OFF
ALL Flashing
ALL ON
ON FLASHING FLASHING ON FLASHING
ON FLASHING FLASHING ON ON
Message
Unit not connected
Automatic checking impossible,
all units connect wrong
All units connect correctly
ON: unit connect correctly
FLASHING: unit connect wrong,
need to change the wiring
manually between 2,3, and 5
ON: unit connect correctly
FLASHING: unit connect wrong,
need to change the wiring
manually between 2,3
Abnormal

16
Trouble shooting

Address: 1356 Broadway, New York, NY 10018
Contacts: Tel: [phone]
Website: http://www haier com/us/