SM_AG(GA)_R32_INV_MY_NA_1912
XTREME INVERTER SERIES
SERVICE MANUAL
Table of Contents
§. Safety Precautions
1. Precautions
2. Information servicing(For flammable materials)
§. Specifications
1. Model Reference
2. Pipe length and the Drop Height
3. Electrical Wiring Diagrams
§. Product Features
1. Display Function
2. Safety Features
3. Basic Features
4. Optional Features
§. Maintenance
1. First Time Installation Check
2. Refrigerant Recharge
3. Re-Installation
§. Indoor Unit Disassembly
1. Dimension
2. Indoor Unit Disassembly
§. Outdoor Unit Disassembly
1. Outdoor Unit Table
2. Dimension
3. Outdoor Unit Disassembly
Table of Contents
§. Troubleshooting
1. Safety Caution
2. General Troubleshooting
3. Complain Record Form
4. Information Inquiry
5. Error Diagnosis and Troubleshooting Without Error Code
6. Quick Maintenance by Error Code
7. Troubleshooting by Error Code
8. Check Procedures
Appendix
i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K)
ii) Temperature Sensor Resistance Value Table for TP(for some units) (°C – K)
iii) Pressure On Service Port
Safety Precautions
Contents
1. Precautions .............................................................................................................2
2. Information servicing(For flammable materials) .................................................3
1. Precautions
To prevent personal injury, or property or unit damage,
adhere to all precautionary measures and instructions
outlined in this manual. Before servicing a unit, refer to this
service manual and its relevant sections.
Failure to adhere to all precautionary measures listed in this
section may result in personal injury, damage to the unit or
to property, or in extreme cases, death.
WARNING indicates a potentially hazardous
situation which if not avoided could result in serious
personal injury, or death.
CAUTION indicates a potentially hazardous situation
which if not avoided could result in minor or
moderate personal injury, or unit damage.
1.1 In case of Accidents or Emergency
WARNING
•• If a gas leak is suspected, immediately turn off the
gas and ventilate the area if a gas leak is suspected
before turning the unit on.
•• If strange sounds or smoke is detected from the unit,
turn the breaker off and disconnect the power supply
cable.
•• If the unit comes into contact with liquid, contact an
authorized service center.
•• If liquid from the batteries makes contact with skin or
clothing, immediately rinse or wash the area well with
clean water.
•• Do not insert hands or other objects into the air inlet
or outlet while the unit is plugged in.
•• Do not operate the unit with wet hands.
•• Do not use a remote controller that has previously
been exposed to battery damage or battery leakage.
CAUTION
•• Clean and ventilate the unit at regular intervals when
operating it near a stove or near similar devices.
•• Do not use the unit during severe weather conditions.
If possible, remove the product from the window
before such occurrences.
1.2 Pre-Installation and Installation
WARNING
•• Use this unit only on a dedicated circuit.
•• Damage to the installation area could cause the unit
to fall, potentially resulting in personal injury, property damage, or product failure.
•• Only qualified personnel should disassemble, install,
remove, or repair the unit.
•• Only a qualified electrician should perform electri-
cal work. For more information, contact your dealer,
seller, or an authorized service center.
CAUTION
•• While unpacking be careful of sharp edges around
the unit as well as the edges of the fins on the condenser and evaporator.
1.3 Operation and Maintenance
WARNING
•• Do not use defective or under-rated circuit breakers.
•• Ensure the unit is properly grounded and that a
dedicated circuit and breaker are installed.
•• Do not modify or extend the power cable. Ensure
the power cable is secure and not damaged during
operation.
•• Do not unplug the power supply plug during
operation.
•• Do not store or use flammable materials near the
unit.
•• Do not open the inlet grill of the unit during
operation.
•• Do not touch the electrostatic filter if the unit is
equipped with one.
•• Do not block the inlet or outlet of air flow to the unit.
•• Do not use harsh detergents, solvents, or similar items
to clean the unit. Use a soft cloth for cleaning.
•• Do not touch the metal parts of the unit when
removing the air filter as they are very sharp.
•• Do not step on or place anything on the unit or
outdoor units.
•• Do not drink water drained from the unit
•• Avoid direct skin contact with water drained from the
unit.
•• Use a firm stool or step ladder according to
manufacturer procedures when cleaning or
maintaining the unit.
CAUTION
•• Do not install or operate the unit for an extended
period of time in areas of high humidity or in an
environment directly exposing it to sea wind or salt
spray.
•• Do not install the unit on a defective or damaged
installation stand, or in an unsecure location.
•• Ensure the unit is installed at a level position
•• Do not install the unit where noise or air discharge
created by the outdoor unit will negatively impact the
environment or nearby residences.
•• Do not expose skin directly to the air discharged by
the unit for prolonged periods of time.
•• Ensure the unit operates in areas water or other
liquids.
•• Ensure the drain hose is installed correctly to ensure
proper water drainage.
•• When lifting or transporting the unit, it is
recommended that two or more people are used for
this task.
•• When the unit is not to be used for an extended time,
disconnect the power supply or turn off the breaker.
Safety Precautions 2
2. Information servicing(For
flammable materials)
2.1 Checks to the area
• Prior to beginning work on systems containing flammable
refrigerants, safety checks are necessary to ensure that the
risk of ignition is minimized.
• For repair to the refrigerating system, the following
precautions shall be complied with prior to conducting work
on the system.
2.2 Work procedure
• Work shall be undertaken under a controlled procedure so
as to minimise the risk of a flammable gas or vapour being
present while the work is being performed.
2.3 Work procedure
• All maintenance staff and others working in the local area
shall be instructed on the nature of work being carried out.
• Work in confined spaces shall be avoided.
• The area around the work space shall be sectioned off.
Ensure that the conditions within the area have been made
safe by control of flammable material.
2.4 Checking for presence of refrigerant
• The area shall be checked with an appropriate refrigerant
detector prior to and during work, to ensure the technician
is aware of potentially flammable atmospheres.
• Ensure that the leak detection equipment being used is
suitable for use with flammable refrigerants, i.e. no sparking,
adequately sealed or intrinsically safe.
2.5 Presence of fire extinguisher
• If any hot work is to be conducted on the refrigeration
equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand.
• Have a dry powder or CO2 fire extinguisher adjacent to the
charging area.
• Prior to work taking place, the area around the equipment
is to be surveyed to make sure that there are no flammable
hazards or ignition risks.
• NO SMOKING signs shall be displayed.
2.7 Ventilated area
• Ensure that the area is in the open or that it is adequately
ventilated before breaking into the system or conducting any
hot work. A degree of ventilation shall continue during the
period that the work is carried out. The ventilation should
safely disperse any released refrigerant and preferably expel
it externally into the atmosphere.
2.8 Checks to the refrigeration equipment
• Where electrical components are being changed,
they shall be fit for the purpose and to the correct
specification. At all times the manufacturer’s
maintenance and service guidelines shall be followed.
If in doubt consult the manufacturer’s technical
department for assistance. The following checks
shall be applied to installations using flammable
refrigerants:
• the charge size is in accordance with the room size
within which the refrigerant containing parts are
installed;
• the ventilation machinery and outlets are operating
adequately and are not obstructed;
• if an indirect refrigerating circuit is being used, the
secondary circuit shall be checked for the presence
of refrigerant; marking to the equipment continues
to be visible and legible.
• markings and signs that are illegible shall be
corrected;
• refrigeration pipe or components are installed in
a position where they are unlikely to be exposed
to any substance which may corrode refrigerant
containing components, unless the components
are constructed of materials which are inherently
resistant to being corroded or are suitably protected
against being so corroded.
2.6 No ignition sources
• No person carrying out work in relation to a refrigeration
system which involves exposing any pipe work that contains
or has contained flammable refrigerant shall use any sources
of ignition in such a manner that it may lead to the risk of
fire or explosion.
• All possible ignition sources, including cigarette smoking,
should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which
flammable refrigerant can possibly be released to the
surrounding space.
Safety Precautions 3
2.9 Checks to electrical devices
• Repair and maintenance to electrical components shall
include initial safety checks and component inspection
procedures. If a fault exists that could compromise
safety, then no electrical supply shall be connected to
the circuit until it is satisfactorily dealt with. If the fault
cannot be corrected immediately but it is necessary to
continue operation, an adequate temporary solution
shall be used. This shall be reported to the owner of
the equipment so all parties are advised. Initial safety
checks shall include:
• that capacitors are discharged: this shall be done in
a safe manner to avoid possibility of sparking;
• that there no live electrical components and wiring
are exposed while charging, recovering or purging
the system;
• that there is continuity of earth bonding.
2.10 Repairs to sealed components
• During repairs to sealed components, all electrical
supplies shall be disconnected from the equipment
being worked upon prior to any removal of sealed
covers, etc. If it is absolutely necessary to have an
electrical supply to equipment during servicing, then
a permanently operating form of leak detection shall
be located at the most critical point to warn of a
potentially hazardous situation.
• Particular attention shall be paid to the following to
ensure that by working on electrical components, the
casing is not altered in such a way that the level of
protection is affected. This shall include damage to
cables, excessive number of connections, terminals
not made to original specification, damage to seals,
incorrect fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• Ensure that seals or sealing materials have not
degraded such that they no longer serve the
purpose of preventing the ingress of flammable
atmospheres. Replacement parts shall be in
accordance with the manufacturer’s specifications.
NOTE: The use of silicon sealant may inhibit the
effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated
prior to working on them.
2.11 Repair to intrinsically safe components
• Do not apply any permanent inductive or capacitance
loads to the circuit without ensuring that this will not
exceed the permissible voltage and current permitted
for the equipment in use. Intrinsically safe components
are the only types that can be worked on while live
in the presence of a flammable atmosphere. The test
apparatus shall be at the correct rating.
• Replace components only with parts specified by the
manufacturer. Other parts may result in the ignition of
refrigerant in the atmosphere from a leak.
2.12 Cabling
• Check that cabling will not be subject to wear,
corrosion, excessive pressure, vibration, sharp edges
or any other adverse environmental effects. The check
shall also take into account the effects of aging or
continual vibration from sources such as compressors
or fans.
2.13 Detection of flammable refrigerants
• Under no circumstances shall potential sources of
ignition be used in the searching for or detection of
refrigerant leaks. A halide torch (or any other detector
using a naked flame) shall not be used.
2.14 Leak detection methods
• The following leak detection methods are deemed
acceptable for systems containing flammable
refrigerants. Electronic leak detectors shall be used
to detect flammable refrigerants, but the sensitivity
may not be adequate, or may need re-calibration.
(Detection equipment shall be calibrated in a
refrigerant-free area.) Ensure that the detector is not
a potential source of ignition and is suitable for the
refrigerant used. Leak detection equipment shall be
set at a percentage of the LFL of the refrigerant and
shall be calibrated to the refrigerant employed and
the appropriate percentage of gas (25 % maximum)
is confirmed. Leak detection fluids are suitable for
use with most refrigerants but the use of detergents
containing chlorine shall be avoided as the chlorine
may react with the refrigerant and corrode the copper
pipe-work.
• If a leak is suspected, all naked flames shall be
removed or extinguished.
• If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered
from the system, or isolated (by means of shut off
valves) in a part of the systemremote from the leak.
Oxygen free nitrogen (OFN) shall then be purged
through the system both before and during the
brazing process.
2.15 Removal and evacuation
• When breaking into the refrigerant circuit to make
repairs or for any other purpose, conventional
procedures shall be used. However, it is important
that best practice is followed since flammability is a
consideration.
• The following procedure shall be adhered to:
• remove refrigerant;
• purge the circuit with inert gas;
• evacuate;
• purge again with inert gas;
• open the circuit by cutting or brazing.
Safety Precautions 4
• The refrigerant charge shall be recovered into the
correct recovery cylinders. The system shall be flushed
with OFN to render the unit safe. This process may
need to be repeated several times. Compressed air or
oxygen shall not be used for this task. Flushing shall
be achieved by breaking the vacuum in the system
with OFN and continuing to fill until the working
pressure is achieved, then venting to atmosphere, and
finally pulling down to a vacuum. This process shall
be repeated until no refrigerant is within the system.
When the final OFN charge is used, the system shall
be vented down to atmospheric pressure to enable
work to take place. This operation is absolutely vital if
brazing operations on the pipe-work are to take place.
• Ensure that the outlet for the vacuum pump is not
close to any ignition sources and there is ventilation
available.
2.16 Charging procedures
• In addition to conventional charging procedures, the
following requirements shall be followed:
• Ensure that contamination of different refrigerants
does not occur when using charging equipment.
Hoses or lines shall be as short as possible to
minimize the amount of refrigerant contained in
them.
• Cylinders shall be kept upright.
• Ensure that the refrigeration system is earthed prior
to charging the system with refrigerant.
• Label the system when charging is complete (if not
already).
• Extreme care shall be taken not to overfill the
refrigeration system.
• Prior to recharging the system it shall be pressure
tested with OFN. The system shall be leak tested on
completion of charging but prior to commissioning.
A follow up leak test shall be carried out prior to
leaving the site.
2.17 Decommissioning
Before carrying out this procedure, it is essential that the
technician is completely familiar with the equipment and
all its detail. It is recommended good practice that all
refrigerants are recovered safely. Prior to the task being
carried out, an oil and refrigerant sample shall be taken.
In case analysis is required prior to re-use of reclaimed
refrigerant. It is essential that electrical power is available
before the task is commenced.
• Become familiar with the equipment and its operation.
• Isolate system electrically.
• Before attempting the procedure ensure that:
• mechanical handling equipment is available, if
required, for handling refrigerant cylinders;
• all personal protective equipment is available and
being used correctly;
• the recovery process is supervised at all times by a
competent person;
• recovery equipment and cylinders conform to the
appropriate standards.
• Pump down refrigerant system, if possible.
• If a vacuum is not possible, make a manifold so that
refrigerant can be removed from various parts of the
system.
• Make sure that cylinder is situated on the scales before
recovery takes place.
• Start the recovery machine and operate in accordance
with manufacturer’s instructions.
• Do not overfill cylinders. (No more than 80 % volume
liquid charge).
• Do not exceed the maximum working pressure of the
cylinder, even temporarily.
• When the cylinders have been filled correctly and the
process completed, make sure that the cylinders and
the equipment are removed from site promptly and all
isolation valves on the equipment are closed off.
• Recovered refrigerant shall not be charged into
another refrigeration system unless it has been cleaned
and checked.
2.18 Labelling
• Equipment shall be labelled stating that it has been decommissioned and emptied of
• refrigerant. The label shall be dated and signed. Ensure
that there are labels on the equipment stating the
equipment contains flammable refrigerant.
2.19 Recovery
• When removing refrigerant from a system, either for
servicing or decommissioning, it is recommended good
practice that all refrigerants are removed safely.
• When transferring refrigerant into cylinders, ensure
that only appropriate refrigerant recovery cylinders
are employed. Ensure that the correct numbers of
cylinders for holding the total system charge are
available. All cylinders to be used are designated
for the recovered refrigerant and labelled for that
refrigerant (i.e. special cylinders for the recovery of
refrigerant). Cylinders shall be complete with pressure
relief valve and associated shut-off valves in good
working order.
Safety Precautions 5
• Empty recovery cylinders are evacuated and, if
possible, cooled before recovery occurs.
• The recovery equipment shall be in good working
order with a set of instructions concerning the
equipment that is at hand and shall be suitable for the
recovery of flammable refrigerants. In addition, a set
of calibrated weighing scales shall be available and in
good working order.
• Hoses shall be complete with leak-free disconnect
couplings and in good condition. Before using the
recovery machine, check that it is in satisfactory
working order, has been properly maintained and that
any associated electrical components are sealed to
prevent ignition in the event of a refrigerant release.
Consult manufacturer if in doubt.
• The recovered refrigerant shall be returned to the
refrigerant supplier in the correct recovery cylinder,
and the relevant Waste Transfer Note arranged. Do not
mix refrigerants in recovery units and especially not in
cylinders.
• If compressors or compressor oils are to be removed,
ensure that they have been evacuated to an
acceptable level to make certain that flammable
refrigerant does not remain within the lubricant.
The evacuation process shall be carried out prior to
returning the compressor to the suppliers. Only electric
heating to the compressor body shall be employed
to accelerate this process. When oil is drained from a
system, it shall be carried out safely.
Safety Precautions 6
Specifications
Contents
1. Model Reference ....................................................................................................2
2. Pipe Length and Drop Height ...............................................................................3
3. Electrical Wiring Diagrams ....................................................................................4
1. Model Reference
Refer to the following table to determine the specific indoor and outdoor unit model.
Indoor Unit Model Outdoor Unit Model Capacity (Btu/h) Power Supply
MSAGB-09CRDN8-QD6GA MOX130-09CDN8-QD6GA 9k
MSAGB-12CRDN8-QD6GA MOX130-12CDN8-QD6GA 12k
MSAGC-18CRDN8-QD0GA MOX230-18CDN8-QD0GA 18k
220~240V~, 50Hz,
1Phase
Specifications 2
2. Pipe Length and Drop Height
The length and elevation of connection pipe are shown in the table below. if the pipe length exceeds max pipe length,
additional refrigerant should be charged to ensure nominal cooling/heating capacity.
Capacity(Btu/h) Standard Length Max Pipe Length Max Elevation Additional Refrigerant
9k/12k
5m (16.4ft)
18k 30m(98.4ft) 20m(65.6ft)
If oil flows back into the outdoor unit’s compressor, this might cause liquid compression or deterioration of oil return. Oil
traps in the rising gas pipe can prevent this.
25m (82.0ft) 10m (32.8ft)
12g/m (0.13oz/ft)
1. Indoor unit is installed higher than outdoor unit 2. Outdoor unit is installed higher than indoor unit
If indoor unit is installed higher than outdoor unit, oil trap should be set every 10m(32.8ft) of vertical distance.
If the outdoor unit is installed higher than the indoor unit, proper oil should return to the compressor along with the
suction of refrigerant to keep lubrication of compressor. If the suction flow velocity drops below 7.62m/s(1500fpm (feet
per minute)), oil won’t return to the compressor. An oil trap should be installed every 6m(20ft) of vertical distance.
Specifications 3
3. Electrical Wiring Diagrams
Indoor and outdoor unit wiring diagram
Indoor Unit Outdoor Unit
IDU Model IDU Wiring Diagram ODU Model ODU Wiring Diagram
MSAGB-09CRDN8-QD6GA
MSAGB-12CRDN8-QD6GA MOX130-12CDN8-QD6GA
MSAGC-18CRDN8-QD0GA MOX230-18CDN8-QD0GA
Outdoor unit printed circuit board diagram
MOX130-09CDN8-QD6GA
MOX130-12CDN8-QD6GA
MOX230-18CDN8-QD0GA
16022000024294
Outdoor Unit
ODU Model ODU Printed Circuit Board
MOX130-09CDN8-QD6GA
17122000048121
17122000048064
16022000019573
16022000019583
Specifications 4
Indoor unit abbreviations
Abbreviation Paraphrase
Outdoor unit abbreviations
Abbreviation Paraphrase
Y/G Yellow-Green Conductor
ION Positive and Negative Ion Generator
CAP Capacitor
PLASMA Electronic Dust Collector
L LIVE
N NEUTRAL
4-WAY Gas Valve Assembly/4-WAY VALVE
AC-FAN Alternating Current FAN
DC-FAN Direct Current FAN
COMP Compressor
L-PRO Low Pressure Switch
H-PRO High Pressure Switch
Specifications 5
Indoor unit wiring diagram: 16022000024294
INDOOR WIRING DIAGRAM
HEATER
L
N
1(L)
2(N)
S
- - - - This symbol indicates the
element is optional,the actual
shape shall prevail.
OPTIONAL
Y/G
ION
P1
P2
X Y E 12V/5V
To CCM Comm.Bus or
485 Wire-controller
OPTIONAL
Applicable to
AC motor only
HA HB
To Randomly
Connected
Wire-controller
3
To Remote Alarm
M
5(3or2)
CAP
4
To Remote Switch
M
M
2
SWITCH BOARD
2
CN701
OPTIONAL
3
OPTIONAL
OPTIONAL
OPTIONAL
16022000024294
Outdoor unit printed circuit board diagram: 17122000044714, 17122000048121
PMV
AC-FAN
4-WAY
HEAT1
H
N
L
DC-FAN
RED
BLUE
W
BLACK
V
U
Earth
HEAT2
KFR-35W/BP2N-(R X24T+TNY288+41560 B2+4134).D.13.WP2-1
L-IN
N-IN
[1.7] 2018-10-26
17122000044714
TP
T4
T3
Test
S
N-IN
L-IN
Earth
S
R606
R316
R611
R610
R607
E2
E1
R1
CN3_1
CN3
CN3_2
CN16
Q101
+
D2
C6
C7
CN60
IC1
IC2
R2
R21
R23
R128
R129
R132
R133
RY2
R195
CN25
RY3
RY4
RY5
RC1
R131
~ ~
IN
OUT
AC
-
+
C25
R18
CN17
R130
D1
+
L4
E409
R53
CN6
+
DZ601
R12
D3
CN11
CN10
IC101
+
DZ204
E283
C24
R14
IC5
R96
R71
R32
R31
R29
R28
R27
R19
IC8
IC6
IC4
E19
E8
E6
D10
D6
D5
D4
CY6
C31
C29
C28
C27
C26
IC103
C115
C103
1
3
X1
IC602
IC601
R619
L1
R514
R513
R512
R505
R502
R501
R17
R13
R10
IPM501
E282
E281
E280
CN31
CN7
C518
C516
C507
C276
C275
C274
C273
C271
C117
C23
C22
C21
C20
C19
C15
C13
C12
IPM301
C18
C8
C9
R11
D601
DZ301
R191
C105
R621
R617
R616
R196
R187
R186
R185
R182
R181
R180
R175
R155
R154
R152
R150
R149
R148
R147
R125
R121
R120
R115
R114
R110
R105
R104
R103
R102
C612
C133
C129
C128
C124
C123
C121
C120
C118
C116
C111
C101
IC105
Q601
C303
R695
C309
R603
CN50
C5
CN1A
R26
R24
R22
CN15
C134
R15
R16
R630
R627
R200
D605
C617
R9
R8
R7
R5
R3
CN21/CN22
ZR4
R626
R612
R608
R605
R604
R602
R601
R323
R315
R301
R190
R189
R188
R179
R178
R176
R172
R171
R170
R169
R168
R165
R156
R143
R142
R140
R138
R137
R136
R127
R112
R111
R108
R107
R106
PTC1
LED101
L3
L2
DAS1
D610
D602
D406
D103
D101
CN29
CN28
CN2
C695
C624
C618
C613
C606
C605
C322
C318
C316
C314
C312
C311
C310
C308
C307
C306
C305
C135
C132
C131
C130
C127
C126
C125
C119
C114
C113
C112
C107
C106
C104
C102
C11
C3
C2
L601
RY1
E102
C601
R623
C17
ZR2
CN1
R135
R20
CN30
R4
R6
R25
R118
E4
C4
FUSE1
T20A/250VAC
BR1
C1
ZR1
E332
E331
E330
R173
C10
R622
C16
C700
R330
R333
R335 R336
R117
R116
C272
R30
R33
C405
T1
R36
IC104
D401
C30
Rdi
R34
R618
R615
IC3
C32
C330
C331
C332
C319
R322
R321
R320
R319
R318
R317
C321
C320
IC603
C614
C611
C35
C36
R37
R38
R39
R40
R41
R42
R43
R44
R45
R46
R47
R48
R49 R50
R51
R52
CN4
CN5
E5
D104
C14
1
2
3
8
9
15
6
1414
13
4
5
10
7
11
12
No. Name CN# Meaning
CN3 Earth: connect to Ground
CN1 N_in: connect to N-line (208-230V AC input)
1 CN1A
CN2 L_in: connect to L-line (208-230V AC input)
CN16 S: connect to indoor unit communication
2 HEAT1 CN17 connect to compressor heater, 208-230V AC when is ON
3 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
4 HEAT2 CN15 connect to chassis heater, 208-230V AC when is ON
5 AC-FAN CN25 connect to AC fan
6 PMV CN31 connect to Electric Expansion Valve
7 TESTPORT CN6 used for testing
8 TP T4 T3 CN21/CN22
9 DC-FAN CN7 connect to DC fan
10 FAN_IPM IPM 501 IPM for DC fan
W CN28 connect to compressor
11
12 COMP_IPM IPM 301 IPM for compressor
Note: This section is for reference only. Please take practicality as standard.
V CN29 0V AC (standby)
U CN30 10-200V AC (running)
connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust
temp. sensor TP
Outdoor unit printed circuit board diagram: 17122000048064
No. Name CN# Meaning
CN6 Earth: connect to Ground
1 Power Supply
2 S CN2 S: connect to indoor unit communication
3 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
4 AC-FAN CN5 connect to AC fan
5 HEAT2 CN19 connect to chassis heater, 208-230V AC when is ON
6 TP T4 T3 CN17
7 PMV CN18 connect to Electric Expansion Valve
8 HEAT1 CN16 connect to compressor heater, 208-230V AC when is ON
9 DC-FAN CN414 connect to DC fan
10 TESTPORT CN23 used for testing
11 FAN_IPM IPM501 IPM for DC fan
CN7 N_in: connect to N-line (208-230V AC input)
CN8 L_in: connect to L-line (208-230V AC input)
connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust
temp. sensor TP
12 COMP_IPM IPM1 IPM for compressor
U CN27 connect to compressor
13
14 EE_PORT CN505 EEPROM programer port
Note: This section is for reference only. Please take practicality as standard.
V CN28 0V AC (standby)
W CN29 200-300V AC (running)
Product Features
Contents
1. Display Function ....................................................................................................2
2 Safety Features ......................................................................................................3
3. Basic Functions .......................................................................................................4
3.1 Abbreviation ..................................................................................................4
3.2 Fan Mode ......................................................................................................4
3.3 Cooling Mode ...............................................................................................4
3.4 Heating Mode(Heat Pump Units) ...................................................................5
3.5 Auto-mode ....................................................................................................6
3.6 Drying Mode .................................................................................................7
3.7 Forced Operation Function ............................................................................7
3.8 Timer Function ..............................................................................................7
3.9 Sleep Function ...............................................................................................7
3.10 Auto-Restart Function ....................................................................................8
3.11 Active Clean function ....................................................................................8
3.12 Follow me(Optional) ......................................................................................8
3.13 8°C Heating(Optional) ...................................................................................8
3.14 Silence (Optional) ..........................................................................................8
3.15 ECO function(Optional) .................................................................................8
3.16 Electrical energy consumption control function(Optional) ...............................8
3.17 Breeze away function(Optional) .....................................................................8
3.18 Wireless control(optional) ..............................................................................9
1. Display Function
Unit display functions
fresh defrost run timer
Display A Display B
Display Function
fresh Fresh(available on select units only)
defrost Defrost
run When the unit is on
timer When TIMER is on
Product Features
Temperature value Temperature
(3s)
(3s)
Note: Please select the display function according to your purchase product.
WiFi control (available on select units only)
Activation of Timer ON, Fresh, Swing, Turbo, or Silent
Cancellation of Timer OFF, Fresh, Swing, Turbo, or Silent
Defrost
Active Clean(For Inverter split type) or self-cleaning(For
Fixed-speed type)
Heating in room temperature under 8°C
Product Features 2
2. Safety Features
Compressor three-minute delay at restart
Compressor functions are delayed for up to ten seconds upon the fi rst startup of the unit, and are delayed for up
to three minutes upon subsequent unit restarts.
Automatic shutoff based on discharge temperature
If the compressor discharge temperature exceeds a certain level for a period of time, the compressor ceases operation.
Automatic shutoff based on fan speed
If the indoor fan speed registers below 200RPM or over 2100RPM for an extended period of time, the unit ceases
operation and the corresponding error code is displayed on the indoor unit.
Inverter module protection
The inverter module has an automatic shutoff mechanism based on the unit’s current, voltage, and temperature. If
automatic shutoff is initiated, the corresponding error code is displayed on the indoor unit and the unit ceases operation.
Indoor fan delayed operation
• When the unit starts, the louver is automatically activated and the indoor fan will operate after a period of setting
time or the louver is in place.
• If the unit is in heating mode, the indoor fan is regulated by the anti-cold wind function.
Compressor preheating
Preheating is automatically activated when T4 sensor is lower than setting temperature.
Sensor redundancy and automatic shutoff
• If one temperature sensor malfunctions, the air conditioner continues operation and displays the corresponding error
code, allowing for emergency use.
• When more than one temperature sensor is malfunctioning, the air conditioner ceases operation.
Product Features 3
3. Basic Functions
3.1 Abbreviation
Unit element abbreviations
Abbreviation Element
T1 Indoor room temperature
T2 Coil temperature of evaporator
T3 Coil temperature of condenser
T4 Outdoor ambient temperature
Tsc Adjusted setting temperature
TP Compressor discharge temperature
3.2 Fan Mode
When fan mode is activated:
• The outdoor fan and compressor cease operation.
• Temperature control is disabled and indoor room
temperature is displayed.
• The indoor fan speed can be set to 1%~100%, or
auto.
• The louver operations are identical to those in cooling
mode.
• Auto fan: In fan-only mode, AC operates the same as
auto fan in cooling mode with the temperature set at
24°C.(Tsc =24°C)
3.3 Cooling Mode
3.3.1 Compressor Control
Reach the configured temperature:
1) When the compressor runs continuously for within 120
minutes.
• If the following conditions are satisfied, the
compressor ceases operation.
• Calculated frequency(fb) is less than minimum limit
frequency(FminC).
• Compressor runs at FminC more than 10 minutes
• T1 is lower than or equal to (Tsc-CDIFTEMP-0.5°C)
Note: CDIFTEMP is EEPROM setting parameter. It is 2°C
usually.
2) When the compressor runs continuously for more than
120 minutes.
frequency(FminC).
• Compressor runs at FminC more than 10 minutes.
• T1 is lower than or equal to (Tsc-CDIFTEMP).
Note: CDIFTEMP is EEPROM setting parameter. It is 2°C
usually.
3) If one of the following conditions is satisfied, not judge
protective time.
• Compressor running frequency(fr) is more than test
frequency(TestFre).
• Compressor running frequency is equal to test
frequency, T4 is more than 15°C or T4 fault.
• Change setting temperature.
• Turbo or sleep function on/off
• Various frequency limit shutdown occurs.
3.3.2 Indoor Fan Control
1) In cooling mode, the indoor fan operates continuously.
The fan speed can be set to 1%-100%, or auto.
2) Auto fan
For DC fan motor units:
• Descent curve
• When T1-Tsc is lower than or equal to 3.5°C, fan
speed reduces to 80%;
• When T1-Tsc is lower than or equal to 1°C, fan
speed reduces to 60%;
• When T1-Tsc is lower than or equal to 0.5°C, fan
speed reduces to 40%;
• When T1-Tsc is lower than or equal to 0°C, fan
speed reduces to 20%;
• When T1-Tsc is lower than or equal to -0.5°C, fan
speed reduces to 1%.
• Rise curve
• When T1-Tsc is higher than 0°C, fan speed
increases to 20%;
• When T1-Tsc is higher than 0.5°C, fan speed
increases to 40%;
• When T1-Tsc is higher than 1°C, fan speed
increases to 60%;
• When T1-Tsc is higher than 1.5°C, fan speed
increases to 80%;
• When T1-Tsc is higher than 4°C, fan speed
increases to 100%.
• If the following conditions are satisfied, the
compressor ceases operation.
• Calculated frequency(fb) is less than minimum limit
Product Features 4
For AC fan motor units:
3.3.3 Outdoor Fan Control
• The outdoor unit will be run at different fan speed
according to T4 and compressor running frequency..
• For different outdoor units, the fan speeds are
different.
3.3.4 Condenser Temperature Protection
level per 1 minute.
• Hold: Keep the current frequency.
• Resume: No limitation for frequency.
3.4 Heating Mode(Heat Pump Units)
3.4.1 Compressor Control
1) Reach the configured temperature
• If the following conditions are satisfied, the
compressor ceases operation.
• Calculated frequency(fb) is less than minimum limit
frequency(FminH).
• Compressor runs at FminH more than 10 minutes.
• T1 is higher than or equal to Tsc+ HDIFTEMP2.
Note: HDIFTEMP2 is EEPROM setting parameter. It is 2°C
usually.
• If one of the following conditions is satisfied, not
judge protective time.
• Compressor running frequency(fr) is more than test
frequency(TestFre).
• When compressor running frequency is equal to
test frequency, T4 is more than 15°C or T4 fault.
• Change setting temperature.
• Turbo or sleep function on/off.
2) When the current is higher than the predefined safe
value, surge protection is activated, causing the
compressor to cease operations.
When the condenser temperature exceeds a configured
value, the compressor ceases operation.
3.3.5 Evaporator Temperature Protection
• Off: Compressor stops.
• Decrease: Decrease the running frequency to the lower
3.4.2 Indoor Fan Control:
1) In heating mode, the indoor fan operates continuously.
The fan speed can be set to 1%-100%, or mute.And
the anti-cold wind function has the priority.
• Anti-cold air function
• The indoor fan is controlled by the indoor
temperature T1 and indoor unit coil temperature
T2.
T1 ≥ 19°C(66.2°F) ΔTE1=0
15°C(59°F) ≤ T1 < 19°C(66.2°F)
T1<15°C(59°F) ΔTE1=4°C(7.2°F)
ΔTE1=19°C-T1
(34.2°F-T1)
Product Features 5
2) Auto fan
For DC fan motor units:
• Rise curve
• When T1-Tsc is higher than -1.5°C, fan speed
reduces to 80%;
• When T1-Tsc is higher than 0°C, fan speed reduces
to 60%;
• When T1-Tsc is higher than 0.5°C, fan speed
reduces to 40%;
• When T1-Tsc is higher than 1°C, fan speed reduces
to 20%.
• Descent curve
• When T1-Tsc is lower than or equal to 0.5°C, fan
speed increases to 40%;
• When T1-Tsc is lower than or equal to 0°C, fan
speed increases to 60%;
• When T1-Tsc is lower than or equal to -1.5°C, fan
speed increases to 80%;
• When T1-Tsc is lower than or equal to -3°C, fan
speed increases to 100%.
For AC fan motor units:
heating mode:
• T3 rises above TCDE1°C.
• T3 maintained above TCDE2°C for 80 seconds.
• Unit runs for 15 minutes consecutively in defrosting
mode.
• If T4 is lower than or equal to -22°C and compressor
running time is more than TIMING_DEFROST_TIME,
if any one of the following conditions is satisfied,
defrosting ends and the machine switches to normal
heating mode:
• Unit runs for 10 minutes consecutively in defrosting
mode.
• T3 rises above 10°C.
For some models:
• If T3 is lower than 3°C and compressor running time
is more than 120 minutes, at this time, if T3 is lower
than TCDI1+4°C(39.2°F) for 3 minutes, the unit
enters defrosting mode. If any one of the following
conditions is satisfied, defrosting ends and the
machine switches to normal heating mode:
• T3 rises above TCDE1+4°C.
• T3 maintained above TCDE2+4°C for 80 seconds.
• Unit runs for 15 minutes consecutively in defrosting
mode.
3.4.3 Outdoor Fan Control:
• The outdoor unit will be run at different fan speed
according to T4 and compressor running frequency.
• For different outdoor units, the fan speeds are
different.
3.4.4 Defrosting mode
• The unit enters defrosting mode according to changes
in the temperature value of T3, T4 as well as the
compressor running time.
• In defrosting mode, the compressor continues to run,
the indoor and outdoor motor will cease operation,
the defrost light of the indoor unit will turn on, and
the “ ” symbol is displayed.
• If any one of the following conditions is satisfied,
defrosting ends and the machine switches to normal
3.4.5 Evaporator Temperature Protection
• Off: Compressor stops.
• Decrease: Decrease the running frequency to the lower
level per 20 seconds.
• Hold: Keep the current frequency.
• Resume: No limitation for frequency.
3.5 Auto-mode
• This mode can be selected with the remote controller
and the setting temperature can be changed between
16°C~30°C.
• In auto mode, the machine selects cooling, heating,
Product Features 6
auto-drying or fan-only mode on the basis of T1,Ts, T4
and relative humidity.
• mode
• fan speed
• setting temperature
• Forced defrosting mode:
• Press AUTO/COOL button continuously for 5s
under forced cooling mode to enter this mode.
• Indoor fan will stop, defrosting lamp will light on.
• Quit this mode and turn off the unit when:
• quit normal defrosting
• turn off by RC
• Press AUTO/COOL button continuously for 5s
again
• If the setting temperature is modified, the machine
selects a new running function.
3.6 Drying mode
• In drying mode, AC operates the same as auto fan in
cooling mode.
• All protections are activated and operate the same as
they do that in cooling mode.
• Low Room Temperature Protection
If the room temperature is lower than 10°C, the
compressor ceases operations and does not resume until
room temperature exceeds 12°C.
3.7 Forced operation function
• Forced cooling mode:
The compressor and outdoor fan continue to run(fixed at
rated frequency), and the indoor fan runs at rated speed.
After running for 30 minutes, the AC will switch to auto
mode with a preset temperature of 24°C.
• Forced auto mode:
Forced auto mode operates the same as normal auto mode
with a preset temperature of 24°C.
• The unit exits forced operation when it receives the
following signals:
• Switch on
• Switch off
• Timer on
• Timer off
• Sleep mode
• Follow me
• Changes in:
3.8 Timer function
• Timing range is 24 hours.
• Timer on. The machine will turn on automatically
when reaching the setting time.
• Timer off. The machine will turn off automatically
when reaching the setting time.
• Timer on/off. The machine will turn on automatically
when reaching the setting “on” time, and then turn
off automatically when reaching the setting “off”
time.
• Timer off/on. The machine will turn off automatically
when reaching the setting “off” time, and then turn
on automatically when reaching the setting “on” time.
• The timer function will not change the AC current
operation mode. Suppose AC is off now, it will not
start up firstly after setting the “timer off” function.
And when reaching the setting time, the timer LED
will be off and the AC running mode has not been
changed.
• The setting time is relative time.
• The AC will quit the timer function when it has
malfunction
3.9 Sleep function
• The sleep function is available in cooling, heating, or
auto mode.
• The operational process for sleep mode is as follows:
• When cooling, the temperature rises 1°C (to not
higher than 30°C) every hour. After 2 hours, the
temperature stops rising and the indoor fan is fixed
at low speed.
• When heating, the temperature decreases 1°C(to
not lower than 16°C) every hour. After 2 hours, the
temperature stops decreasing and the indoor fan is
fixed at low speed. Anti-cold wind function takes
Product Features 7
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