Page 1
Aurora ON-OFF SERIES
Service Manual 2015
ABSEU-A4-1511
Page 2
CONTENTS
1. Precaution .................................................................................................................................................... 3
1.1 Safety Precaution ........................................................................................................................ 3
1.2 Warning ....................................................................................................................................... 3
2. Function ........................................................................................................................................................ 6
3. Dimension .................................................................................................................................................... 7
3.1 Indoor Unit ................................................................................................................................... 7
3.2 Outdoor Unit .............................................................................................................................. 11
4. Refrigerant Cycle Diagram ....................................................................................................................... 16
5 Installation Details ...................................................................................................................................... 17
5.1 Wrench torque sheet for installation .......................................................................................... 17
5.2 Connecting the cables ............................................................................................................... 17
5.3 Pipe length and the elevation .................................................................................................... 18
5.4 Installation for the first time........................................................................................................ 19
6.5 Adding the refrigerant after running the system for many years ................................................ 20
5.6 Re-installation while the indoor unit need to be repaired ........................................................... 21
5.7 Re-installation while the outdoor unit need to be repaired ......................................................... 22
6. Operation Characteristics ......................................................................................................................... 23
7. Electronic function .................................................................................................................................... 24
7.1 Abbreviation .............................................................................................................................. 24
7.2 Display function ......................................................................................................................... 24
7.3 Main Protection ......................................................................................................................... 25
7.4 Operation Modes and Functions ............................................................................................... 26
8. Troubleshooting ......................................................................................................................................... 30
8.1 Indoor Unit Error Display ........................................................................................................... 30
8.2 Diagnosis and Solution .................................................................................... 错误!未定义书签。
Page 3
1. Precaution
1.1 Safety Precaution
To prevent injury to the user or other
people and property damage, the following
instructions must be followed.
Incorrect operation due to ignoring
instruction will cause harm or damage.
Before service the unit, be sure to
read this service manual at first.
1.2 Warning
Installation
Do not use a defective or underrated
circuit breaker. Use this appliance on a
dedicated circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer,
seller, a qualified electrician, or an
authorized service center.
Do not disassemble or repair the product,
there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of
control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and
breaker.
Improper wiring or installation may cause fore
or electric shock.
Use the correctly rated breaker of
fuse.
There is risk of fire or electric shock.
Do not modify or extend the power
cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the
unit by yourself (customer).
There is risk of fire, electric shock, explosion,
or injury.
Be caution when unpacking and
installing the product.
Sharp edges could cause injury, be especially
careful of the case edges and the fins on the
condenser and evaporator.
For installation, always contact the
dealer or an authorized service center.
Do not install the product on a
defective installation stand.
Be sure the installation area does not
deteriorate with age.
If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, and personal injury.
Do not let the air conditioner run for a
long time when the humidity is very high
and a door or a window is left open.
Take care to ensure that power cable
could not be pulled out or damaged during
operation.
There is risk of fire or electric shock.
Do not place anything on the power
cable.
There is risk of fire or electric shock.
Do not plug or unplug the power
supply plug during operation.
There is risk of fire or electric shock.
Do not touch (operation) the product
with wet hands.
Do not place a heater or other
appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into
electrical parts.
It may cause fire, failure of the product, or
electric shock.
Do not store or use flammable gas or
combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly
closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off
the gas and open a window for ventilation
before turn the product on.
If strange sounds or smoke comes
from product, turn the breaker off or
disconnect the power supply cable.
There is risk of electric shock or fire.
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Stop operation and close the window
in storm or hurricane. If possible, remove
the product from the window before the
hurricane arrives.
There is risk of property damage, failure of
product, or electric shock.
Do not open the inlet grill of the
product during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
There is risk of physical injury, electric shock,
or product failure.
When the product is soaked, contact
an authorized service center.
There is risk of fire or electric shock.
Be caution that water could not enter
the product.
There is risk of fire, electric shock, or product
damage.
Ventilate the product from time to
time when operating it together with a stove
etc.
There is risk of fire or electric shock.
Turn the main power off when
cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a
long time, disconnect the power supply plug
or turn off the breaker.
There is risk of product damage or failure, or
unintended operation.
Take care to ensure that nobody
could step on or fall onto the outdoor unit.
This could result in personal injury and
product damage.
CAUTION
Always check for gas (refrigerant)
leakage after installation or repair of
product.
Low refrigerant levels may cause failure of
product.
Install the drain hose to ensure that
water is drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the
product.
It can avoid vibration of water leakage.
Do not install the product where the
noise or hot air from the outdoor unit could
damage the neighborhoods.
It may cause a problem for your neighbors.
Use two or more people to lift and
transport the product.
Do not install the product where it will
be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product
malfunction or inefficient operation.
Operational
Do not expose the skin directly to
cool air for long time. (Do not sit in the
draft).
Do not use the product for special
purposes, such as preserving foods, works
of art etc. It is a consumer air conditioner,
not a precision refrigerant system.
There is risk of damage or loss of property.
Do not block the inlet or outlet of air
flow.
Use a soft cloth to clean. Do not use
harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage
to the plastic parts of the product.
Do not touch the metal parts of the
product when removing the air filter. They
are very sharp.
Do not step on or put anything on the
product. (outdoor units)
Always insert the filter securely.
Clean the filter every two weeks or more
often if necessary.
A dirty filter reduces the efficiency of the air
conditioner and could cause product
malfunction or damage.
Do not insert hands or other objects
through air inlet or outlet while the product
is operated.
Do not drink the water drained from
the product.
Use a firm stool or ladder when
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cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote
control with new ones of the same type. Do
not mix old and new batteries or different
types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the
batteries. Do not dispose of batteries in a
fire.
They may burn of explode.
If the liquid from the batteries gets
onto your skin or clothes, wash it well with
clean water. Do not use the remote of the
batteries have leaked.
Page 6
2. Function
Model Names of Indoor/Outdoor Units
On-Off
Capacity Indoor units Outdoor units
7k MSABA-07HRN1-QC2 MOAB30-07HN1-QC2
9k MSABB-09ARN1-QB8 MOBA30-09HN1-QB8
9k MSABA-09HRN1-QC2 MOAB31-09HN1-QC2
12k MSABB-12ARN1-QB6 MOBA30-12HN1-QB6
12k MSABB-12HRN1-QC2 MOBA30-12HN1-QC2
18k
MSABD-18ARN1-QB8 MOCA30-18HN1-QB8
18k MSABD-18HRN1-QC2 MOBA30-18HN1-QC2
24k MSABE-24ARN1-QB8W MOCA30-24HN1-QB8W
24k MSABE-24HRN1-QB8W MOCA30-24HN1-QB8W
36k MSABF-36HRN1-RC0W MOD30-36HN1-RC0W
Cold catalyst filter
Silver Ico Filter(O)
Vitamin C Filter(O)
3M HAM Filter(O)
Bio Filter(O)
Golden Fin(O)
Super Ionizer(O)
Compressor Crankcase Heater(O)Self-cleaning (O)
Louver Position Memory Function
Refrigerant Leakage Detect
Self-diag. Function
Hydrophilic Aluminum Fin
Anti-rust Cabinet
Valve Protection Cover
PTC Heating Belt(O)
Filter
2 ways of drainage
O:optional
Page 7
3. Dimension
3.1 Indoor Unit
Model W D H
MSABA-07HRN1-QC2 722 187 290
MSABB-09ARN1-QB8 722 187 290
MSABA-09HRN1-QC2 722 187 290
MSABB-12ARN1-QB6 802 189 297
MSABB-12HRN1-QC2 802 189 297
MSABD-18ARN1-QB8 965 215 319
MSABD-18HRN1-QC2 965 215 319
MSABE-24ARN1-QB8W 1080 226 335
MSABE-24HRN1-QB8W 1080 226 335
MSABF-36HRN1-RC0W 1259 282 362
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For MSABA-07HRN1-QC2，MSABB-09ARN1-QB8，MSABA-09HRN1-QC2，
Page 9
For MSABB-12ARN1-QB6，MSABB-12HRN1-QC2，
For MSABD-18ARN1-QB8, MSABD-18HRN1-QC2,
For MSABE-24ARN1-QB8W, MSABE-24HRN1-QB8W,
Page 10
For MSABF-36HRN1-RC0W,
Page 11
3.2 Outdoor Unit
More than 30cm
More than 60cm
More than 200cm
More than 30cm
More than 60cm
(Service space
︶
F
e
n
c
e
o
r
ob
s
t
ac
l
es
Page 12
For MOAB30-07HN1-QC2, MOAB31-09HN1-QC2,
Page 13
For MOBA30-12HN1-QC2, MOBA30-18HN1-QC2, MOBA30-09HN1-QB8, MOBA30-12HN1-QB6,
487 W1
70 W2
298
555
300 D
H
12
60
93
H1
H2
D1
770 W
779 W3
322
D2
25 B1
90 B2
61.5 A2
12 A1
R
6
286
D3
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For MOCA30-24HN1-QB8W, MOCA30-18HN1-QB8, MOCA30-24HN1-QB8W,
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For MOD30-36HN1-RC0W,
946 W
810 H
1030 W1
673 A
403B
455D3
410 D
810 H
455 D3
15
57 H1
117 H2
73
12
24
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4. Refrigerant Cycle Diagram
LIQUID SIDE
GAS SIDE
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
2-WAY VALVE
3-WAY VALVE
4-WAY VALVE
COOLING
HEATING
T2 Evaporator
temp. sensor
T1 Room temp.
sensor
ACCUMULATOR
INDOOR OUTDOOR
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE
Page 17
5 Installation Details
5.1 Wrench torque sheet for installation
Outside diameter Torque Additional tightening torque
mm inch N.cm N.cm
Ф6.35 1/4 1500(153kgf.cm) 1600(163kgf.cm)
Ф9.52 3/8 2500(255kgf.cm) 2600(265kgf.cm)
Ф12.7 1/2 3500(357kgf.cm) 3600(367kgf.cm)
Ф15.9 5/8 4500(459kgf.cm) 4700(479kgf.cm)
Ф19 3/4 6500(663kgf.cm) 6700(683kgf.cm)
5.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Rated current of appliance Nominal cross-sectional area (mm²)
>3 and ≤6 0.75
>6 and ≤10 1
>10 and ≤16 1.5
>16 and ≤25 2.5
The cable size and the current of the fuse or switch are determined by the maximum current indicated
on the nameplate which located on the side panel of the unit. Please refer to the nameplate before
selecting the cable, fuse and switch.
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5.3 Pipe length and the elevation
The pipe length and refrigerant amount:
Model
Pipe size
Standard
length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
refrigerant
(g/m)
Gas Liquid
MSABA-07HRN1-QC2+ MOAB30-07HN1-QC2
3/8’’
(
Ф9.52
)
1/4’’
(
Ф6.35
)
5 8 20 20
MSABA-09HRN1-QC2+ MOAB31-09HN1-QC2
3/8’’
(
Ф9.52
)
1/4’’
(
Ф6.35
)
5 8 20 20
MSABB-09ARN1-QB8+MOBA30-09HN1-QB8
3/8’’
(
Ф9.52
)
1/4’’
(
Ф6.35
)
5 8 20 20
MSABB-12HRN1-QC2 +MOBA30-12HN1-QC2
1/2’’
(
Ф12.7
)
1/4’’
(
Ф6.35
)
5 8 20 20
MSABB-12ARN1-QB6+MOBA30-12HN1-QB6
1/2’’
(
Ф12.7
)
1/4’’
(
Ф6.35
)
5 8 20 20
MSABD-18HRN1-QC2 +MOBA30-18HN1-QC2
1/2’’
(
Ф12.7
)
1/4’’
(
Ф6.35
)
5 10 25 20
MSABD-18ARN1-QB8 +MOCA30-18HN1-QB8
1/2’’
(
Ф12.7
)
1/4’’
(
Ф6.35
)
5 10 25 20
MSABE-24HRN1-QB8W +MOCA30-24HN1-QB8W
5/8’’
(
Ф15.9
)
3/8’’
(
Ф9.52
)
5 10 25 40
MSABE-24ARN1-QB8W +MOCA30-24HN1-QB8W
5/8’’
(
Ф15.9
)
3/8’’
(
Ф9.52
)
5 10 25 40
MSABF-36HRN1-RC0W +MOD30-36HN1-RC0W
5/8’’
(
Ф15.9
)
3/8’’
(
Ф9.52
)
5 15 30 40
Caution:
The capacity test is based on the standard length and the maximum permissive length is based on the
system reliability.
Page 19
5.4 Installation for the first time
Air and moisture in the refrigerant system have
undesirable effects as below:
● Pressure in the system rises.
● Operating current rises.
● Cooling or heating efficiency drops.
● Moisture in the refrigerant circuit may
freeze and block capillary tubing.
● Water may lead to corrosion of parts in the
refrigerant system.
Therefore, the indoor units and the pipes
between indoor and outdoor units must be leak
tested and evacuated to remove gas and
moisture from the system.
Gas leak check (Soap water method):
Apply soap water or a liquid neutral
detergent on the indoor unit connections or
outdoor unit connections by a soft brush to
check for leakage of the connecting points of
the piping. If bubbles come out, the pipes have
leakage.
1. Air purging with vacuum pump
1) Completely tighten the flare nuts of the
indoor and outdoor units, confirm that both
the 2-way and 3-way valves are set to the
closed position.
2) Connect the charge hose with the push pin
of handle lo to the 3-way valves gas service
port..
3) Connect the charge hose of handle hi
connection to the vacuum pump.
4) Fully open the handle Lo of the manifold
valve.
5) Operate the vacuum pump to evacuate.
6) Make evacuation for 30 minutes and check
whether the compound meter indicates
-0.1Mpa. If the meter does not indicate
-0.1Mpa after pumping 30 minutes, it
should be pumped 20 minutes more. If the
pressure can’t achieve -0.1Mpa after
pumping 50 minutes, please check if there
are some leakage points.
Fully close the handle Lo valve of the manifold
valve and stop the operation of the vacuum
pump. Confirm that the gauge needle does not
move (approximately 5 minutes after turning off
the vacuum pump).
7) Turn the flare nut of the 3-way valves about
45° counterclockwise for 6 or 7seconds
after the gas
coming out, then tighten the flare nut again.
Make sure the pressure display in the pressure
indicator is a little higher than the atmosphere
pressure. Then remove the charge hose from
the 3 way valve.
8) Fully open the 2 way valve and 3 way valve
and securely tighten the cap of the 3 way
valve.
2. Air purging by refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way valves
are set to the closed position.
2). Connect the charge set and a charging
cylinder to the service port of the 3-way valve.
3). Air purging.
Open the valves on the charging cylinder and the
Page 20
charge set. Purge the air by loosening the flare
nut on the 2-way valve approximately 45’ for 3
seconds then closing it for 1 minute; repeat 3
times.
After purging the air, use a torque wrench to
tighten the flare nut on the 2-way valve.
4). Check the gas leakage.
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and
discharge the refrigerant by loosening the flare
nut on the 2-way valve approximately 45’ until the
gauge indicates 0.3 to 0.5 Mpa.
6). Disconnect the charge set and the charging
cylinder, and set the 2-way and 3-way valves to
the open position.
Be sure to use a hexagonal wrench to operate the
valve stems.
7). Mount the valve stems nuts and the service
port cap.
Be sure to use a torque wrench to tighten the
service port cap to a torque 18N∙m.
Be sure to check the gas leakage.
3. Adding the refrigerant if the pipe
length >5m
Procedure:
1). Connect the charge hose to the charging
cylinder, open the 2-way valve and the 3-way
valve.
Connect the charge hose which you
disconnected from the vacuum pump to the
valve at the bottom of the cylinder. If the
refrigerant is R410A, make the cylinder bottom
up to ensure the liquid charge.
2). Purge the air from the charge hose.
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).
3) Put the charging cylinder onto the electronic
scale and record the weight.
4) Operate the air conditioner at the cooling
mode.
5) Open the valves (Low side) on the charge set
and charge the system with liquid refrigerant.
6).When the electronic scale displays the proper
weight (refer to the table), disconnect the charge
hose from the 3-way valve’s service port
immediately and turn off the air conditioner before
disconnecting the hose.
7). Mount the valve stem caps and the service
port
Use torque wrench to tighten the service port
cap to a torque of 18N.m.
Be sure to check for gas leakage.
6.5 Adding the refrigerant after running
the system for many years
Procedure:
1). Connect the charge hose to the 3-way service
port, open the 2-way valve and the 3-way valve.
Connect the charge hose to the valve at the
bottom of the cylinder. If the refrigerant is
R410A, make the cylinder bottom up to ensure
liquid charge.
2). Purge the air from the charge hose.
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).
3) Put the charging cylinder onto the electronic
scale and record the weight.
4) Operate the air conditioner at the cooling
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mode.
5) Open the valves (Low side) on the charge set
and charge the system with liquid refrigerant.
6).When the electronic scale displays the proper
weight (refer to the gauge and the pressure of the
low side), disconnect the charge hose from the
3-way valve’s service port immediately and turn
off the air conditioner before disconnecting the
hose.
7). Mount the valve stem caps and the service
port
Use torque wrench to tighten the service port
cap to a torque of 18N.m.
Be sure to check for gas leakage.
5.6 Re-installation while the indoor unit
need to be repaired
1. Collecting the refrigerant into the outdoor
unit
Procedure
1). Confirm that both the 2-way and 3-way valves
are set to the opened position
Remove the valve stem caps and confirm that the
valve stems are in the opened position.
Be sure to use a hexagonal wrench to operate the
valve stems.
2). Connect the charge hose with the push pin of
handle lo to the 3-way valves gas service port.
3). Air purging of the charge hose.
Open the handle Lo valve of the manifold valve
slightly to purge air from the charge hose for 5
seconds and then close it quickly.
4). Set the 2-way valve to the close position.
5). Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 0.1MPa.
6). Set the 3-way valve to the closed position
immediately
Do this quickly so that the gauge ends up
indicating 0.3 to 0.5Mpa.
Disconnect the charge set, and tighten the 2-way
and 3-way valve’s stem nuts.
Use a torque wrench to tighten the 3-way valves
service port cap to a torque of 18N.m.
Be sure to check for gas leakage.
2. Air purging by the refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way valves
are set to the closed position.
2). Connect the charge set and a charging
cylinder to the service port of the 3-way valve
Leave the valve on the charging cylinder closed.
3). Air purging.
Open the valves on the charging cylinder and the
charge set. Purge the air by loosening the flare
nut on the 2-way valve approximately 45’ for 3
seconds then closing it for 1 minute; repeat 3
times.
After purging the air, use a torque wrench to
tighten the flare nut on the 2-way valve.
4). Check the gas leakage
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and
discharge the refrigerant by loosening the flare
nut on the 2-way valve approximately 45’ until the
gauge indicates 0.3 to 0.5 Mpa.
6). Disconnect the charge set and the charging
cylinder, and set the 2-way and 3-way valves to
the open position
Be sure to use a hexagonal wrench to operate the
valve stems.
Page 22
7). Mount the valve stems nuts and the service
port cap
Be sure to use a torque wrench to tighten the
service port cap to a torque 18N.m.
Be sure to check the gas leakage.
5.7 Re-installation while the outdoor unit
need to be repaired
1. Evacuation for the whole system
Procedure:
1). Confirm that both the 2-way and 3-way
valves are set to the opened position.
2). Connect the vacuum pump to 3-way valve’s
service port.
3). Evacuation for approximately one hour.
Confirm that the compound meter indicates
-0.1Mpa.
4). Close the valve (Low side) on the charge set,
turn off the vacuum pump, and confirm that the
gauge needle does not move (approximately 5
minutes after turning off the vacuum pump).
5). Disconnect the charge hose from the vacuum
pump.
2. Refrigerant charging
Procedure:
1). Connect the charge hose to the charging
cylinder, open the 2-way valve and the 3-way
valve
Connect the charge hose which you
disconnected from the vacuum pump to the
valve at the bottom of the cylinder. If the
refrigerant is R410A, make the cylinder bottom
up to ensure liquid charge.
2). Purge the air from the charge hose
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).
3) Put the charging cylinder onto the electronic
scale and record the weight.
4). Open the valves (Low side) on the charge set
and charge the system with liquid refrigerant
If the system cannot be charge with the specified
amount of refrigerant, or can be charged with a
little at a time (approximately 150g each time) ,
operating the air conditioner in the cooling cycle;
however, one time is not sufficient, wait
approximately 1 minute and then repeat the
procedure.
5).When the electronic scale displays the proper
weight, disconnect the charge hose from the
3-way valve’s service port immediately
If the system has been charged with liquid
refrigerant while operating the air conditioner,
turn off the air conditioner before disconnecting
the hose.
6). Mounted the valve stem caps and the service
port
Use torque wrench to tighten the service port
cap to a torque of 18N.m.
Be sure to check for gas leakage
Page 23
6. Operation Characteristics
Mode
Temperature
Cooling operation Heating operation Drying operation
Room temperature
17℃~32℃
(62℉~90℉)
0℃~30℃
(32℉~86℉)
10℃~32℃
(50℉~90℉)
Outdoor temperature
18℃~43℃
(64℉~109℉)
-7℃~24℃
(20℉~78℉)
11℃~43℃
(52℉~109℉)
-7℃~43℃ (20℉~109℉)
(For the models with low
temperature cooling system)
18℃~52℃
(64℉~126℉)
(For special tropical
models)
18℃~52℃ (64℉~126℉)
(For special tropical models)
CAUTION:
1. If the air conditioner is used beyond the above conditions, certain safety protection features
may come into operation and cause the unit to operate abnormally.
2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this
figure, the surface of the air conditioner may attract condensation. Please set the vertical air flow
louver to its maximum angle (vertically to the floor), and set HIGH fan mode.
3. The optimum performance will be achieved during this operating temperature zone.
Page 24
7. Electronic function
7.1 Abbreviation
T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
7.2 Display function
7.2.1 Icon explanation on indoor display board.
Digital display:
Displays the temperature settings when the air
conditioner is operational.
Displays the room temperature in FAN mode.
Displays the self-diagnostic codes.
Dispalys ‘
’ for three seconds when Timer
ON, Fresh, Swing, Turbo or Silence feature is
activated.
Dispalys ‘
’ for three seconds when Fresh,
Swing, Turbo or Silence feature is cancelled.
Dispalys ‘ ’ under deforsting operation.
Dispalys ‘
’ when anti-cold air feature is
activated under heating mode.
Dispalys ‘
’ during self clean operation (if
aplicable).
Dispalys ‘
’ under 8℃ heating operation (if
aplicable).
NOTE:
A guide on using the infrared remote is not
included in this literature package.
Page 25
7.3 Main Protection
7.3.1 Time Delay at restart for compressor.
Less than 1 minute delay for the 1
st
time
start-up and 3 minutes delay for others.
7.3.2 Sensor protection at open circuit and
breaking disconnection.
7.3.3 Zero crossing detection error
protection
If AC can not detect zero crossing signal for 4
minutes or the zero crossing signal time interval
is not correct, the unit will stop and the LED will
display the failure. The correct zero crossing
signal time interval should be between 6-13ms.
7.3.4 Fan Speed is out of control
When Indoor Fan Speed is too low(lower than
300RPM) lasting 2 minutes, the unit stops and
LED displays failure information and can’t returns
to normal operation automatically.
7.3.5 Current protection
A
B
C
Resume
The current exceeds setting value for certain
time, the compressor and outdoor fan will shut
off.
7.3.6 Indoor fan delayed open function
When the unit starts up, the indoor fan will open
4s later.If the unit runs in heating mode, the
indoor fan will be also controlled by anti-cold
wind function.
7.3.7 Refrigerant leakage detection
This function is only active in cooling mode. It
can better prevent the compressor being
damaged by refrigerant leakage or compressor
overload.
Open condition:
When compressor is active, the value of the
Coil temperature of evaporator T2 has no
change or very little change.
Page 26
7.4 Operation Modes and Functions
7.4.1 Fan mode
(1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled,
and no setting temperature is displayed.
(3) Indoor fan can be set to high/med/low/auto.
(4) The louver operates the same as in cooling
mode.
(5) Auto fan:
High
Low
Medium
7.4.2 Cooling Mode
7.4.2.1 Compressor running rules
When indoor room temp.T1 is lower than
setting value, the compressor and outdoor fan
will shut off.
T1
On
Off
7.4.2.2 Outdoor fan running rules
The On-off outdoor units have single fan speed.
The outdoor fan will run following the
compressor except when AC is in evaporator
high temp. protection in heating
mode ,condenser high temp. protection in
cooling mode, defrosting mode and the current
protection.
7.4.2.3 Indoor fan running rules
In cooling mode, indoor fan runs all the time
and the speed can be selected as high,
medium, low and auto.
The auto fan:
T1-Ts
High
Low
Medium
7.4.2.4 Low evaporator coil temperature T2
protection
T2
On
Off
When the evaporator coil temp.T2 keeps lower
than setting value, the compressor and outdoor
fan will shut off.
7.4.2.5 High condenser temperature T3
protection (only for MSABE-24ARN1-QB8W，
MSABE-24HRN1-QB8W,
MSABF-36HRN1-RC0W)
Page 27
T3
Compressor Off
Compressor On
When high condenser temp. T3 is more than
setting value, the compressor will stop.
During the protection, the outdoor fan keeps
working.
7.4.3 Heating Mode
7.4.3.1 Compressor running rules:
When indoor room temp.T1 is higher than
setting value the compressor and outdoor fan
will shut off.
T1
Off
On
7.4.3.2 Outdoor fan running rules:
The outdoor units have single fan speed. The
outdoor fan will run following the compressor
except when AC is in evaporator high temp.
protection in heating mode , condenser high
temp. protection in cooling mode ,defrosting
mode and the current protection.
7.4.3.3 Indoor fan running rules:
When the compressor is on, the indoor fan can
be set to high/med/low/auto. And the anti-cold
wind function has the priority.
Auto fan action:
T1-TS
Low
Medium
The indoor fan speed will adjust according to
the value of T1-T
S
.
7.4.3.4 Defrosting mode：
For MSABB-09ARN1-QB8,
MSABB-12ARN1-QB6，MSABD-18ARN1-QB8,
MSABA-07HRN1-QC2, MSABA-09HRN1-QC2,
MSABB-12HRN1-QC2, MSABD-18HRN1-QC2
models:
AC will enter the defrosting mode according to
the value of temp difference between T2 and T1,
and also the compressor running time.
During the defrosting mode, the compressor keep
running, indoor and outdoor motor will stop,
defrost lamp of the indoor unit will be lighted
“
.” Will be displayed.
For MSABE-24ARN1-QB8W,
MSABE-24HRN1-QB8W ,
MSABF-36HRN1-RC0W models:
AC will enter the defrosting mode according to
the value of temp. of T3 and the value range of
temp. change of T3 and also the compressor
running time.
During the defrosting mode, the compressor keep
running, indoor and outdoor motor will stop,
defrost lamp of the indoor unit will be
lighted .“
.” Will be displayed.
Page 28
7.4.3.5 High evaporator coil temp.T2
protection:
Compressor off
Outdoor fan motor off
Compressor and outdoor
fan motor on
Compressor and outdoor
fan motor off
Compressor and outdoor
fan motor on
7.4.4 Auto-mode
This mode can be chosen with remote
controller.
In auto mode, the machine will choose
operation mode according to ∆T (∆T =T1-Ts).
T1-Ts
Cooling
Heating*
Fan only
Heating*: For cooling only models, they will run
at fan speed
AC will run in auto mode in the below cases:
（1） Pressing the forced auto button.
（2） If AC is off, it will run in auto mode
when the timer on function is active.
（3） After setting the mode, AC will run in
auto mode if the compressor keeps not running
for certain time.
7.4.5 Drying mode
7.4.5.1 The compressor is cycled running with
10 minutes on and then 5 minutes off. The
indoor fan will keep running at low speed.
7.4.5.2 In drying mode, if room temperature is
lower than 10℃, the compressor will stop and
not resume until room temperature exceeds
13℃.
7.4.5.3 The evaporator anti-freezing protection
is the same as that in cooling mode.
7.4.6 Forced operation function
Forced cooling mode:
The compressor and outdoor fan keep running
and the indoor fan runs at low speed. After
running for 30 minutes, AC will turn to auto
mode with 24℃ setting temperature.
Forced auto mode:
The action of forced auto mode is the same as
normal auto mode with 24℃ setting
temperature.
When AC receives signals, such as switch on,
switch off, timer on, timer off, mode setting, fan
speed setting, sleeping mode setting, follow me
setting, it will quit the forced operation.
7.4.7 Auxiliary heater function（Only for the
units with this function）
AC will enter the Auxiliary heater function if all
of the following items are satisfied.
1)Heating mode.
2)PTC Auxiliary heater function is on.
3)The compressor is on and last over 6
seconds.
4)The indoor fun is on.
5)T2<47℃.
6)Non-defrosting mode.
7)T1<31℃.
AC will exit the Auxiliary heater function if one
of the following items are satisfied.
1)Non-heating mode.
2PTC Auxiliary heater function is off.
3.The compressor is off.
4.The indoor fun is off.
5.T2 >51℃ last 3 minutes.
6.In defrosting mode.
7.T1>33℃ last 3 minutes.
7.4.8 Auto-Restart function
The indoor unit is equipped with auto-restart
function, which is carried out through an
auto-restart module. In case of a sudden power
failure, the module memorizes the setting
conditions before the power failure. The unit will
Page 29
resume the previous operation setting (not
including swing function) automatically after 3
minutes when power returns.
If the memorization condition is forced cooling
mode, the unit will run in cooling mode for 30
minutes and turn to auto mode as 24℃ setting
temp.
If AC is off before power off and AC is required
to start up now, the compressor will have 1
minute delay when power on. Other conditions,
the compressor will have 3 minutes delay when
restarts.
7.4.9 Refrigerant Leakage Detection
With this new technology, the display area will
show “EC” when the outdoor unit detects
refrigerant leakage.
When compressor is active, the value of the
Coil temperature of evaporator T2 has no
change or very little change.
7.4.10 8℃ Heating(optional)
When the compressor is running, the indoor fan
motor will run without anti-cold air function.
When the compressor is off, the indoor fan
motor is off .
7.4.11 Self clean(optional)
For heat pump models which are provided with
this function, after running in cooling or drying
mode, if the user press “Self Clean” button on
remote controller, firstly, indoor unit runs in fan
only mode for a while, then low heat operation
and finally runs in fan only again. This function
can keep the inside of indoor unit dry and
prevent breeding of mold.
7.4.12 Follow me(optional)
1) If the indoor PCB receives the signal which
results from pressing the FOLLOW ME button
on remote controller, the buzzer will emit a
sound and this indicates the follow me function
is initiated. But when the indoor PCB receives
signal which sent from remote controller every
3 minutes, the buzzer will not respond. When
the unit is running with follow me function, the
PCB will control the unit according to the
temperature from follow me signal, and the
temperature collection function of room
temperature sensor will be shielded, but the
error detective function of room temperature
sensor will be still valid.
2) When the follow me function is available,
the PCB will control the unit according to the
room temperature from the remote controller
and the setting temperature.
3) The PCB will take action to the mode
change information from remote controller
signal, but it will not affected by the setting
temperature.
4) When the unit is running with follow me
function, if the PCB doesn’t receive any signal
from remote controller for 7 minutes or pressing
FOLLOW ME button again, the follow me
function will be turned off automatically, and the
temperature will control the unit according to
the room temperature detected from its own
room temperature sensor and setting
temperature.
Page 30
8. Troubleshooting
8.1 Indoor Unit Error Display
Operation lamp Timer lamp Display LED STATUS
☆ 1 time
X E1 EEPROM parameter error
☆ 2 times
X E2 Zero-crossing signal detection error
☆ 3 times
X E3 Indoor fan speed has been out of control
☆ 5 times
X E5
Indoor room temperature sensor T1 open circuit or
short circuit
☆ 6 times
X E6
Evaporator coil temperature sensor T2 open circuit or
short circuit
☆ 7 times
X E7
Condenser coil temperature sensor T3 or T4 open
circuit or short circuit(only for MSABE-24ARN1-QB8W,
MSABE-24HRN1-QB8W ,
MSABF-36HRN1-RC0W)
☆ 2 times
O EC Refrigerant Leakage Detection
☆ 8 times
X E8
Lake of phase or Phase sequence error (only for
MSABF-36HRN1-RC0W)
☆ 9 times
X E9
Indoor / outdoor units communication error(only for
MSABE-24ARN1-QB8W, MSABE-24HRN1-QB8W ,
MSABF-36HRN1-RC0W)
O（light） X（off） ☆（flash）
Page 31
8.2 Diagnosis and Solution
8.2.1 EEPROM parameter error diagnosis and solution(E1)
Error Code
E1
Malfunction decision
conditions
Indoor or outdoor PCB main chip does not receive feedback
from EEPROM chip.
Supposed causes ● Installation mistake
● PCB faulty
Trouble shooting:
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed
voltage.
Page 32
8.2.2 Zero crossing detection error diagnosis and solution(E2)
Error Code
E2
Malfunction decision
conditions
When PCB does not receive zero crossing signal feedback for 4
minutes or the zero crossing signal time interval is abnormal.
Supposed causes ● Connection mistake
● PCB faulty
Trouble shooting:
Page 33
8.2.3 Fan speed has been out of control diagnosis and solution(E3)
Error Code
E3
Malfunction decision
conditions
When indoor fan speed keeps too low (300RPM) for certain time,
the unit will stop and the LED will display the failure.
Supposed causes ● Wiring mistake
● Fan ass’y faulty
● Fan motor faulty
● PCB faulty
Trouble shooting:
Page 34
Index1:
1: Indoor AC Fan Motor
Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds,
measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power
supply)or 50V(115V power supply), the PCB must has problems and need to be replaced.
Page 35
8.2.4 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)
Error Code
E5/E6/ E7
Malfunction decision
conditions
If the sampling voltage is lower than 0.06V or higher than 4.94V,
the LED will display the failure.
Supposed causes ● Wiring mistake
● Sensor faulty
Trouble shooting:
Check the connection
between temperature
sensor and PCB.
Correct the connectionNo
Yes
Replace indoor or outdoor
main PCB
Measure the resistance
value of the sensor
Repalce the sensorNo
Yes
Page 36
8.2.5 Refrigerant Leakage Detection diagnosis and solution(EC)
Error Code
EC
Malfunction decision
conditions
Define the evaporator coil temp.T2 of the compressor just starts
running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2
＜Tcool－2℃ does not keep continuous 4 sec onds and this
situation happens 3 times, the display area will show “EC” and
AC will turn off.
Supposed causes ● T2 sensor faulty
● Indoor PCB faulty
● System problems, such as leakage or blocking.
Trouble shooting:
Check cool air blowing out
from indoor air outlet
Yes
Yes
Check if T2 sensor
is well fixed
No
Check leakage of system
No
Power off, then restart the
unit 2 minutes later.
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
Yes
check blockIng of system and
clear the blocking
Page 37
8.2.6 Lake of phase or Phase sequence error diagnosis and solution(E8)
Error Code
E8
Malfunction decision
conditions
When the two phases of B and C are reversed or lacked, the AC will
stop working.
Supposed causes ● Power supply mistake
● Outdoor PCB faulty
Trouble shooting:
Page 38
8.2.7 Indoor / outdoor unit’s communication diagnosis and solution(E9)
Error Code
E9
Malfunction decision
conditions
Indoor unit does not receive the feedback from outdoor unit during
120 seconds.
Supposed causes ● Wiring mistake
● Indoor or outdoor PCB faulty
Trouble shooting:
Page 39
Main parts check
1.Temperature sensor checking
Disconnect the temperature sensor from PCB, measure the resistance value with a tester.
Temperature Sensors.
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(T5) sensor.
Measure the resistance value of each winding by using the multi-meter.
Page 40
Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K)
°C
°F
K Ohm
°C
°F
K Ohm
°C
°F
K Ohm
°C
°F
K Ohm
-20 -4 115.266 20 68 12.6431 60 140 2.35774 100 212 0.62973
-19 -2 108.146 21 70 12.0561 61 142 2.27249 101 214 0.61148
-18 0 101.517 22 72 11.5 62 144 2.19073 102 216 0.59386
-17 1 96.3423 23 73 10.9731 63 145 2.11241 103 217 0.57683
-16 3 89.5865 24 75 10.4736 64 147 2.03732 104 219 0.56038
-15 5 84.219 25 77 10 65 149 1.96532 105 221 0.54448
-14 7 79.311 26 79 9.55074 66 151 1.89627 106 223 0.52912
-13 9 74.536 27 81 9.12445 67 153 1.83003 107 225 0.51426
-12 10 70.1698 28 82 8.71983 68 154 1.76647 108 226 0.49989
-11 12 66.0898 29 84 8.33566 69 156 1.70547 109 228 0.486
-10 14 62.2756 30 86 7.97078 70 158 1.64691 110 230 0.47256
-9 16 58.7079 31 88 7.62411 71 160 1.59068 111 232 0.45957
-8 18 56.3694 32 90 7.29464 72 162 1.53668 112 234 0.44699
-7 19 52.2438 33 91 6.98142 73 163 1.48481 113 235 0.43482
-6 21 49.3161 34 93 6.68355 74 165 1.43498 114 237 0.42304
-5 23 46.5725 35 95 6.40021 75 167 1.38703 115 239 0.41164
-4 25 44 36 97 6.13059 76 169 1.34105 116 241 0.4006
-3 27 41.5878 37 99 5.87359 77 171 1.29078 117 243 0.38991
-2 28 39.8239 38 100 5.62961 78 172 1.25423 118 244 0.37956
-1 30 37.1988 39 102 5.39689 79 174 1.2133 119 246 0.36954
0 32 35.2024 40 104 5.17519 80 176 1.17393 120 248 0.35982
1 34 33.3269 41 106 4.96392 81 178 1.13604 121 250 0.35042
2 36 31.5635 42 108 4.76253 82 180 1.09958 122 252 0.3413
3 37 29.9058 43 109 4.5705 83 181 1.06448 123 253 0.33246
4 39 28.3459 44 111 4.38736 84 183 1.03069 124 255 0.3239
5 41 26.8778 45 113 4.21263 85 185 0.99815 125 257 0.31559
6 43 25.4954 46 115 4.04589 86 187 0.96681 126 259 0.30754
7 45 24.1932 47 117 3.88673 87 189 0.93662 127 261 0.29974
8 46 22.5662 48 118 3.73476 88 190 0.90753 128 262 0.29216
9 48 21.8094 49 120 3.58962 89 192 0.8795 129 264 0.28482
10 50 20.7184 50 122 3.45097 90 194 0.85248 130 266 0.2777
11 52 19.6891 51 124 3.31847 91 196 0.82643 131 268 0.27078
12 54 18.7177 52 126 3.19183 92 198 0.80132 132 270 0.26408
13 55 17.8005 53 127 3.07075 93 199 0.77709 133 271 0.25757
14 57 16.9341 54 129 2.95896 94 201 0.75373 134 273 0.25125
15 59 16.1156 55 131 2.84421 95 203 0.73119 135 275 0.24512
16 61 15.3418 56 133 2.73823 96 205 0.70944 136 277 0.23916
17 63 14.6181 57 135 2.63682 97 207 0.68844 137 279 0.23338
18 64 13.918 58 136 2.53973 98 208 0.66818 138 280 0.22776
19 66 13.2631 59 138 2.44677 99 210 0.64862 139 282 0.22231
Page 41
Appendix 2 Temperature Sensor Resistance Value Table for T5 (°C --K)
°C
°F
K Ohm
°C
°F
K Ohm
°C
°F
K Ohm
°C
°F
K Ohm
-20 -4 542.7 20 68 68.66 60 140 13.59 100 212 3.702
-19 -2 511.9 21 70 65.62 61 142 13.11 101 214 3.595
-18 0 483 22 72 62.73 62 144 12.65 102 216 3.492
-17 1 455.9 23 73 59.98 63 145 12.21 103 217 3.392
-16 3 430.5 24 75 57.37 64 147 11.79 104 219 3.296
-15 5 406.7 25 77 54.89 65 149 11.38 105 221 3.203
-14 7 384.3 26 79 52.53 66 151 10.99 106 223 3.113
-13 9 363.3 27 81 50.28 67 153 10.61 107 225 3.025
-12 10 343.6 28 82 48.14 68 154 10.25 108 226 2.941
-11 12 325.1 29 84 46.11 69 156 9.902 109 228 2.86
-10 14 307.7 30 86 44.17 70 158 9.569 110 230 2.781
-9 16 291.3 31 88 42.33 71 160 9.248 111 232 2.704
-8 18 275.9 32 90 40.57 72 162 8.94 112 234 2.63
-7 19 261.4 33 91 38.89 73 163 8.643 113 235 2.559
-6 21 247.8 34 93 37.3 74 165 8.358 114 237 2.489
-5 23 234.9 35 95 35.78 75 167 8.084 115 239 2.422
-4 25 222.8 36 97 34.32 76 169 7.82 116 241 2.357
-3 27 211.4 37 99 32.94 77 171 7.566 117 243 2.294
-2 28 200.7 38 100 31.62 78 172 7.321 118 244 2.233
-1 30 190.5 39 102 30.36 79 174 7.086 119 246 2.174
0 32 180.9 40 104 29.15 80 176 6.859 120 248 2.117
1 34 171.9 41 106 28 81 178 6.641 121 250 2.061
2 36 163.3 42 108 26.9 82 180 6.43 122 252 2.007
3 37 155.2 43 109 25.86 83 181 6.228 123 253 1.955
4 39 147.6 44 111 24.85 84 183 6.033 124 255 1.905
5 41 140.4 45 113 23.89 85 185 5.844 125 257 1.856
6 43 133.5 46 115 22.89 86 187 5.663 126 259 1.808
7 45 127.1 47 117 22.1 87 189 5.488 127 261 1.762
8 46 121 48 118 21.26 88 190 5.32 128 262 1.717
9 48 115.2 49 120 20.46 89 192 5.157 129 264 1.674
10 50 109.8 50 122 19.69 90 194 5 130 266 1.632
11 52 104.6 51 124 18.96 91 196 4.849
12 54 99.69 52 126 18.26 92 198 4.703
13 55 95.05 53 127 17.58 93 199 4.562
14 57 90.66 54 129 16.94 94 201 4.426
15 59 86.49 55 131 16.32 95 203 4.294
16 61 82.54 56 133 15.73 96 205 4.167
17 63 78.79 57 135 15.16 97 207 4.045
18 64 75.24 58 136 14.62 98 208 3.927
19 66 71.86 59 138 14.09 99 210 3.812
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