Toyotomi TAN-A53EW User manual

SERVICE MANUAL
ROOM AIR CONDITIONER
TAN/TAG-A53EW
TAN/TAG-A70EW
CONTENTS
SPECIFICATION ....................................................................1
FUNCTIONS ..........................................................................5
SERVICE FUNCTION EXPLANATION ..................................7
OPERATION DETAILS...........................................................8
TROUBLESHOOTING GUIDE.............................................17
PERFORMANCE CURVE DIAGRAM ..................................25
SCHEMATIC DIAGRAM AND
THERMISTOR RESISTANCE CHART.................................
ELECTRIC CIRCUIT DIAGRAM ..........................................
EXPLODED VIEW (INDOOR UNIT) ....................................
EXPLODED VIEW (OUTDOOR UNIT) ................................
PARTS LIST (INDOOR UNIT)..............................................
PARTS LIST (OUTDOOR UNIT)..........................................

SPECIFICATION
– 1 –
TAN/TAG-A53EW
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –20,500
L/h
phase
Moisture Removal –
Power source
Single
V230
Hz 50
OUTLET
Airflow Method
TOP VIEW
INTAKE
m/min
Air circulation (at High) Cooling ;
Heating ;
W
Electrical Data
Input
Running Current
Starting Current
Inner diameter
Length
Cooling ; –
–
Heating ;
ACooling ; –
–
Heating ;
A
inch
Piping Connection Port (Flare piping) L L
inch G G
inch
Pipe Size (Flare piping) inch
mm
Drain hose
Length
Height
Width
Depth
Number of core-wire
Power Cord
–
m–
m–
core-wire/ 2 mm –
mm
Dimensions mm
mm
kg
Net Weight
3
2
; Half Union 1/4''
; Half Union 1/2''
L (liquid side) ; 1/4''
G (gas side) ; 1/2''
; 2-way valve 1/4''
; 3-way valve 1/2''
L (liquid side) ; 1/4''
G (gas side) ; 1/2''
16,900
3.1
29.0
12.0
12.0
1,760
1,665
8.1
7.7
14
0.6
1.4
297
799
210
9.1
642
780
245
44
SIDE VIEW
TAG-A53EW
TAN-A53EW

SPECIFICATION
– 2 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
30 38
DC brushless (8-pole) Induction (6-pole)
W
Heat Exchanger 21.2FPI 19.5 FPI
Capilary Tube
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410 A)
–1,460(51.5)
–
OLR(INNER)
–
Thermostat
Protection Device
Air Filter
Parts Provided
Electronic Control
Type
Motor Type
Rated Output
–
Mold-proof –
Specifications are subject to change without notice.
1 Mounting plate
2 Remote controller
3 Battery (2 pcs.)
4 Remote controller holder
5 Screw cap (2 pcs.)
6 Drain elbow
Timer –
Real time dual ON/OFF
7-hour OFF
TAG-A53EW
TAN-A53EW

SPECIFICATION
– 3 –
TAN/TAG-A53EW
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –24,500
L/h
phase
Moisture Removal –
Power source
Single
V230
Hz 50
OUTLET
Airflow Method
TOP VIEW
INTAKE
m/min
Air circulation (at High) Cooling ;
Heating ;
W
Electrical Data
Input
Running Current
Starting Current
Inner diameter
Length
Cooling ; –
–
Heating ;
ACooling ; –
–
Heating ;
A
inch
Piping Connection Port (Flare piping) L L
inch G G
inch
Pipe Size (Flare piping) inch
mm
Drain hose
Length
Height
Width
Depth
Number of core-wire
Power Cord
–
m–
m–1.4
core-wire/ 2 mm –
mm
Dimensions mm
mm
kg
Net Weight
3
2
; Half Union 1/4''
; Half Union 5/8''
L (liquid side) ; 1/4''
G (gas side) ; 5/8''
; 2-way valve 1/4''
; 3-way valve 5/8''
L (liquid side) ; 1/4''
G (gas side) ; 5/8''
22,000
4.4
54.0
14.0
15.0
2,290
2,240
10.1
9.9
14
0.6
295
799
210
9.1
643
850
330
59
SIDE VIEW
TAG-A70EW
TAN-A70EW

SPECIFICATION
– 4 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
30 100
DC brushless (8-pole) Induction (6-pole)
W
Heat Exchanger 21.2FPI 18.1FPI
Capillary Tube
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A)
–1,700(60.0)
–
OLR(INNER)
–
Thermostat
Protection Device
Air Filter
Parts Provided
Electronic Control
Type
Motor Type
Rated Output
–
Mold-proof –
1 Mounting plate
2 Remote controller
3 Battery (2 pcs.)
4 Remote controller holder
5 Screw cap (2 pcs.)
6 Drain elbow
Timer –
Real time dual ON/OFF
7-hour OFF
Specifications are subject to change without notice.
TAG-A70EW
TAN-A70EW

– 5 –
REMOTE-CONTROL TRANSMITTER
ON/OFF
Operation mode selection
AUTOMATIC
COOL
DRY
HEAT
CIRCULATER
Air flow selection
AUTOMATIC
HIGH
MEDIUM
LOW
Room temperature setting
16°C〜30°C
Timer operation selection
CONTINUOUS operation
OFF
ON
Sleep
Timer / time setting
Operation stops at the set time(OFF timer)
Operation starts at the set time(ON timer)
0.5〜7.0hours(Sleep timer)
Air flow direction control
Auto angle selection
Auto swing mode
Manual mode
INDOOR UNIT
Sensing the room temperature
Room temperature sensor (thermistor)
Time delay safety control
Restarting is inhibited for approximately
3 minutes.
Indoor fan speed control
High, Med, Low
Operation indication lamps (LED)
(GREEN).......Light up in operation
(YELLOW) .... Timer in operation
(GREEN).......Outdoor unit operate
Dry operation mode
Intermittent operation of fan at low speed.
Room temperature control
Maintains the room temperature in
accordance with the setting temperature.
Deice (defrost) control
Deicing operation automatically starts
when the heating efficiency is declined by
the ice formed in the outdoor unit.
After deicing operation, heating operation
automatically starts with “Hot start
function.”
FUNCTIONS
SET
ON
APM
CLOCK
OFF
℃
LH
M
AUTO
MODE
FAN
TIMEADJ
ON OFF
LOUVER

– 6 –
Hot-start control (heating)
The indoor fan stops until the evaporator
piping temperature will be reached.
Overload protection
Anti-freezing control for the
evaporator
Compressor will be stopped when the
evapolator’s piping temperature is below
2°C for one minute.
Compressor will be restarted when the
evaporator’s piping temperature is above
2°C.
Airflow direction control
Automatic airflow direction control
The louver automatically swings up and
down (cooling, dry)...horizontal and 30°
downward.
The louver is set at 60°downward
during heating operation.
The louver is set as horizontal when the
fan is stopped.
Airflow direction manual control.
Can be set within a range at horizontal to
60°downward.
Auto recovery function
If there is any power failure during
operation, operation status before power
failure is memorized.
3〜4 minutes after power recovery, the
unit restarts automatically with previous
operation status memorized.
(3〜4 minutes is protective time for
compressor.)
Attention
Because of Auto Recovery Function, if
shutting off the power supply during
operation, the unit may restart
irrespective your intention when turning
on the power supply next time.
If the unit is not to be used for a long
time, shut off the power supply after
terminating all operation with remote
controller.
OUTDOOR UNIT
Compressor overload protector
When overheating of the compressor is
detected, inner protector stops the
operation of the compressor.
When high current supplied to the
compressor is detected, the main
controller stops the operaiton of outdoor
unit including compressor
3 min. forced operation control
Once the compressor is activated, it does
not stop for 3 minutes.
In case of termination of this operation,
push the ON/OFF button on remote
controller.
FUNCTIONS

– 7 –
EMERGENCY AND TEST OPERATION
Emergency Operation
•Use this operation only when the remote controller is out of order or lost.
•When the emergency operation switch is pressed, the “Pi” sound starts once,
which means the start of this operation.
•In this operation, the system automatically selects the operation modes, cooling
(or heating when available) according to the room temperature, as follows.
・It is not possible to operate in dry mode.
Test Operation
Test operation switch is same as emergency one.
•Use this operation only for testing the performance of the machine in the condition
where the room temperature is less than 16°C.
•Continue to press the test operation switch for more than 5 seconds.
After you hear the “Pi” sound twice, release your finger from the switch: the
cooling operation starts with the air flow speed “HI.”
•If the test operation switch is pressed more than 10 seconds, it doesn’t work.
•After 30 minutes, test operation ends automatically.
SERVICE FUNCTION EXPLANATION
Pi
Pi...Pi Pi
<Remote control unit> <Indoor unit>
Receive
Ex-factory setting (Mode A) Ex-factory setting (Mode A)
Cut R10 on the PC board (Mode B)
Have "J1"on the PC
board short-circuited
by soldering (Mode B)
Receive
Not receive
Not receive
ON
APM
CLOCK
OFF
℃
LH
M
AUTO
℃
ON
APM
CLOCK
OFF
℃
LH
M
AUTO
℃
J1
Soldering
J1
Temperature
ABOVE 23℃
BELOW 23℃
COOLING
HEATING
26℃
23℃
CONTINUOUS
CONTINUOUS
AUTOMATIC
AUTOMATIC
Operation
mode Designated temperature Timer mode Air flow
HOW TO RELEASE EMERGENCY AND TEST OPERATION
•In case of releasing during those operations, you can either push emergency operation switch once more or
apply operation using remote control.
You will hear a beep sound and emergency/ test operation is released.
•If you release the operation by remote control, operation will continue as setting of the remote control
automatically.
INTERFERENCE PREVENTION OF SIGNALS FROM THE REMOTE CONTROLLER
When two indoor units used in the same room, interference of the signals may happen. To avoid this, alternative
signal model B can be selected by the following. (Ex-factory setting is mode A)
•Remote controller side : Have “J1” on the PC board short-circuited by soldering.
•Indoor unit side : Cut “R10” on the PC board.
(Each Operations Details)

– 8 –
OPERATION DETAILS
TIMER OPERATION
ON Timer operation
•Press the ON/OFF switch.
•Set the “ON Time” : Press the “TIMEADJ” button twice.
Adjust the time with the “ , ” button.
Press the “TIME ADJ” button twice.The setting of “ONTime” is complete and the present time appears on the LCD.
•Set the “ON Timer” : Press the Timer fixing button “ON”.
OFF Timer operation
•Press the ON/OFF switch.
•Set the “OFF Time” : Press the “TIMEADJ” button 3 times.
Adjust the time with the “ , ” button.
Press the “TIMEADJ” button once.The setting of “OFF Time” is complete and the present time appears on the LCD.
• Set the “OFF Timer” : Press the Timer fixing button “OFF”.
Sleep Timer operation
• Press the “SLEEP” button during the operation.
• Set the operating period by pressing the “SLEEP” button until the period appears on the LCD.
Timer Cancellation
•ON/OFF Timer : Press the Timer fixing button “ON”(On Timer) and/or “OFF”(Off Timer) once again.
•Sleep Timer : Press the “SLEEP” button until the operating period on the LCD disappears.
Level
Approx.10 degrees
(Cooling/Dry)

Approx.70 degrees
(Heating)

Standard Position
Approx.10
degrees
Approx.40
degrees
Approx.45
degrees Approx.70
degrees
Level
Swing of Air Flow
Cooling
Dry Heating
AIRFLOW DIRECTION CONTROL
Vertical adjustment
When ON/OFF switch is pressed, the vertical louver will move to the adequate positions for each operation
automatically.
Swing of air flow
If air flow direction switch is pressed once, the vertical louver will move within the range of figures.
Fixing the flow direction
If air flow direction switch is pressed again, the vertical louver will be fixed and that position is memorized.
From the next operation the louver will be set at previous position automatically.
Notes :
• In Swing Mode, the louver automatically moves up and down within the certain range, as the illustration below.
• There is two different ranges of louver swinging; one is of cooling & dry mode operation and the other is of
heating operation.

– 9 –
COOLING MODE OPERATION
•Compressor stops when the room temperature is cooled down to the designated temperature.
•Compressor restarts when room temperature is raised to +0.7°C higher than the designated temperature.
OPERATION DETAILS
ROOM TEMP.
DESIGNATED TEMP.
INDOOR FAN ON
ON OFF ON ON ON ON
OFF
COMPRESSOR
0.7
OFF OFF
TIME DELAY SAFETY CONTROL FUNCTION - FOR PROTECTION OF COMPRESSOR
•Compressor will not restart, in any operation modes, for 3 minutes after its stop.
• Compressor does not stop during the first 3 minutes of its operation even if the room temperature reaches to
the designated temperature, except changing setting temperature.
•Fan speed control when “Auto” is selected in fan mode
When “Auto” is selected,the fan speed is automatically controlled according to the difference between the room
and designated temperatures.
ROOM TEMP.
DESIGNATED TEMP.
Hi Me
Lo Hi
INDOOR FAN
＋3℃(＋2.7℃)
＋1℃(＋1.3℃)
＋3.7℃(＋3.3℃
)
＋1.7℃(＋2.0℃
)
＋0.7℃
Me

– 10 –
DESIGNATED TEMP.
(super low)
10min. 6min.
(super low) (super low) (super low) (super low)
INDOOR FAN
COMPRESSOR
0.7
2.0
ON
OFF
ON
ON OFF
OFF
OFF
ON
ONON
ON OFF
OFF OFF
10min. 6min. 3min.
DRY MODE OPERATION
1. When the room temperature is +2°C (or more) higher than designated temperature, compressor and indoor
fan operate.
2. When the room temperature has been cooled to the temperature +2°C higher than the designated, the
compressor and indoor fan start intermittent operation, ON (for 10 min.) and OFF (for 6 min.) by turns.
The air flow speed of indoor fan is super low.
3. When the room temperature is cooled to designated temperature, compressor and indoor fan stop.
The indoor fan restarts at the air flow speed of super low, after 3 minutes the compressor stops.
4. When the room temperature is raised to +0.7°C higher than the designated temperature, the intermittent
operation above #2 starts.
5. When operating in #2 above, if the room temperature becomes +2.7°C higher than the designated, the
operation #1 above starts.
• Method of anti-freezing control of heat-exchanger(indoor)
When the sensor(heat-exchanger) detects the temperature below 2°C for the duration of one minute,the
compressor stops the operation.
After that,the compressor will automatically resume the operation
when the sensor(heat-exchanger) detects the temperature 2°C and above.
TEMPERATURE
INDOOR HEAT
EXCHANGER
ON ON ON
OFF
COMPRESSOR
2℃
OFF
3min1min
OPERATION DETAILS

– 11 –
0.7℃
5℃
Designated 
Temperature
Room 
Temperature
Max.
4 min.
★
Indoor fan 
Stop Super
low Low Designated by remote controller
★: In maximum 4 minutes,the operation proceed to the next steps when the heat 
exchanger is not warmed up to the reference temperature shown above.
Max.
4 min.
★
ON
ON ON OFF OFF OFF ON
OFF
Compressor
HEATING MODE OPERATION
•When room temperature is raised to +4°C higher than the designated temperature, compressor stops.
•When room temperature gets less than +3.3°C higher than the designated temperature, compressor turns on.
•At the start of heating operation, if the room temperature is less than +10°C, additional +1°C is set to the
temperature designated by the remote controller. (Canceled when the compressor first stops.)
•Hot Start Function
To prevent the unpleasant cold air to flow, the air flow speed is determined as shown below according to the
temperature of the indoor heat exchanger.
Temperature,
indoor heat
exchanger
TAN/TAG-A53EW
TAN/TAG-A70EW
T1※ 22℃
23℃
T3
38℃
40℃
T2※
T1※
T3※
T2
33℃
35℃
INDOOR FAN Stop Super
low Low Designated by remote controller
OPERATION DETAILS

– 12 –
• Method of overload control by checking the temperature of heat-exchanger(indoor)
ON ON ON
OFF
OUTDOOR FAN
T1※ 54℃
54℃
T2
52℃
52℃
T2※
OFF
T1※
10sec
TAN/TAG-A53EW
TAN/TAG-A70EW
OPERATION DETAILS
•Fan speed control when “Auto” is selected in fan mode
When “Auto” is selected,the fan speed is automatically controlled according to the difference between the room
and designated temp.+4°C.
ROOM TEMP.
DESIGNATED TEMP.+5℃
Hi Me
Lo Super low Lo Hi
INDOOR FAN
−1℃(−1.3℃)
−3℃(−2.0℃)
−0.7℃
−1.7℃(−2.0℃
)
−3.7℃(−2.7℃
)
Me

– 13 –
OPERATION DETAILS
• Method of overload control by checking the operating current
ON ON ON
OFF
OUTDOOR FAN
CURRENT
I1
7.6A
11.1A
I2
8.0A
10.8A
I2※
OFF
I1※
※ TAN/TAG-A53EW
TAN/TAG-A70EW

– 14 –
DEFROSTING OPERATION
•Defrosting operation is controlled by room temperature, temperature of indoor heat exchanger and timer switch.
•Defrosting operation start when
(a) 50 minutes pass after the start of heating operation or after the completion of previous defrosting
operation, and while compressor is running, the temperature of indoor heat exchanger falls below “room
temperature +14°C”. Condition(a)
or
(b) accumulated time for the stop of outdoor fan, which is for the protection of compressor from excess current
or for the prevention of overheating of indoor heat exchanger, exceeds 90 minutes after the start of heating
operation or after the completion of previous defrosting operation. Condition(b)
Compressor
Defrosting starts
No judge
current
Current
5.5A
★ 1
4min.
55sec.
1min. Max. 9min.
★ 2
Defrosting stops
Indoor fan
OFF OFFON
OFF Hot start Operation
OFF
OFF
super low
Outdoor fan
4way valve
55sec.
1min.
★: 1. Condition(b)
5.6A
6.5A
OPERATION DETAILS
★: 2.
Condition(a)
6.7A
7.5A
TAN/TAG-A53EW
TAN/TAG-A70EW
Defrosting operation is called off after 9 minutes at maximum,even if the current value does not reach
to the above.

– 15 –
INDOOR UNIT
REFRIGERANT
PIPING
REFRIGERANT
PIPING
2-WAY VALVE
3-WAY VALVE
COOLING MODE
HEATING MODE
4-WAY VALVE
ACCUMULATOR
COMPRESSOR
REFRIGERANT FLOW
OUTDOOR UNIT
HEAT EXCHANGER HEAT EXCHANGER
STRAINER
MUFFLER
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE
TAN/TAG-A53EW
REFRIGERATION CYCLE DIAGRAM
OPERATION DETAILS

– 16 –
INDOOR UNIT
REFRIGERANT
PIPING
REFRIGERANT
PIPING
2-WAY VALVE
3-WAY VALVE
COOLING MODE
HEATING MODE
4-WAY VALVE
STRAINER
MUFFLER
ACCUMULATOR
COMPRESSOR
REFRIGERANT FLOW
OUTDOOR UNIT
HEAT EXCHANGER HEAT EXCHANGER
CAPILLARY TUBE
TAN/TAG-A70EW
REFRIGERATION CYCLE DIAGRAM
OPERATION DETAILS

– 17 –
TROUBLESHOOTING GUIDE
FOR YOUR SAFETY USE
TAN : indoor unit TAG : outdoor unit
●For the safety and proper use and handling of the product, please read and follow the instructions carefully.
●The meaning of the marks below are as follows.
●Neverremodelappliance.
Use designated parts or accessories to avoid accidents.
●In case of gas leakage, not only refill the required amount of the refrigerant gas but
also find out the gas leakage point and mend it. If the service work has to be
suspended before mending the leakage points, be sure to collect the refrigerant
gas in the outdoor unit by using pump then fasten the service ports to avoid any
further leakage. Poisonous gas may be generated when the leaked refrigerant is
exposed to fire.
●Clean the pins of the plug and insert the plug completely into the outlet.
●Be sure to change the cable if it is damaged.
Do not use damaged cable.
●Do not use power supply cord extended or connected in halfway.
●Be sure to put the units to earthing works.
●Be sure to check the insulated resistance, more than 1MΩ.
Warning
※The combinations of three LED indicators (ON/Flashing/OFF) provide the self-diagnosis information as most of them shown in
the trouble shooting guide.
[Note1]
Check
Point
Check
Point
●Be sure to off the plug when servicing.
It may cause the risk of electric shock.
●If leakage of refrigerant occur in the installation, ventilate a room.
If the leaked refrigerant is exposed fire, poisonous gas may be generated.
Danger
●Boosting capacitor make the control box assembly (TAG unit) high voltage.
Make the capacitor discharge enough when servicing. Otherwise will be struck
by electricity.
Improper use will cause the significant risk of death or serious injury of the user.
Danger
Warning Improper use may cause the risk of death or serious injury of the user.
Caution ProhibitedHigh Voltage
Strict enforcement Connect the earthing cable
Off the Plug
●Please refer the marks below.
High Temperatare
Discharge electricity of the capacitor by making short circuit firstly. Then check the capacitor by tester.
Be sure to set up the tester for the measurement of bigger resistance.

– 18 –
TROUBLESHOOTING GUIDE
REMOTE CONTROLLER
「ON
」 
POWER TIMER OPERATION
(green) (yellow) (green)
NO
NO
NO
NO
NO
NO
OFF OFF OFF
ON OFF ON
ON
OR
OFF OFF
FLASHING FLASHING OFF
FLASHING
NO ROTATION
SLOW ROTATION
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
YES
NO
NO
NOT COOL ENOUGH
NOT COOL ENOUGH
NOT DRAIN ENOUGH
COOLAIR DOESN'T
COME OUT
(OPERATING IN
HEATING MODE)
TAN FAN REPEATED
"OPERATION STOP"
NOISE
outdoor unit stops before
reaching set up temp.
POWER SUPPLY check the plug inserted into the outlet and the power supply
REMOTE CONTROL
FUSE (3.15A)
FUSE (3.15A)
PCB (RECEIVER & DISPLAY)
if the battery is dead or failure in remote controller
change to new one
check the fuse by eyes or cheak the electric continuity by tester
other than described above [how to operate emergency operation test
operation]
OFF OFF OFF
FLASHING OFF OFF
FLASHING ON ON
"POWER LAMP" GREEN ON
LOUVER
「 OPEN 」
SENSOR, TEMP. ROOM
"OPERATION LAMP" GREEN ON
TAG FAN ROTATING
COMPRESSOR IS WORKING
OPERATING IN DRY MODE
OPERATING IN COOLING MODE
REMOTE CONTROLLER
「 OFF 」 
COMPRESSOR
TAN FAN STOP
TAG FAN
"OPERATION LAMP" OFF
"POWER LAMP" OFF
LOUVER
「 CLOSE 」 
STOP
SENSOR, TEMP. HEAT EXCHANGER
SENSOR, TEMP. ROOM
MOTOR, LOUVER
SENSOR, TEMP. ROOM
SETTING TEMPERATURE
SENSOR, TEMP. ROOM
COMPRESSOR
PREVENTION FOR FREEZING
MIS-WIRING
PCB (MAIN CONTROLLER)
CAPACITOR, TAG FAN MOTOR
TAG FAN MOTOR
PCB (MAIN CONTROLLER)
CAPACITOR, TAG FAN MOTOR
TAG FAN MOTOR
DROP VOLTAGE
BY DROP VOLTAGE
DEFECTIVE WIRING CONTACTS
EXCESS GAS
CAPACITOR, COMPRESSOR
COMPRESSOR LOCKING
PREVENTION FOR OVERHEATING RELAY
MIS-WIRING
CUTTING OFF CT
COMPRESSOR BREAKDOWN
MIS-WIRING
SHORT CIRCUIT OF WIRINGS
SENSOR, TEMP. HEAT EXCHANGER
4-WAY VALVE
FILTER IS CHOKED
SENSOR, TEMP. ROOM
SENSOR, TEMP. HEAT EXCHANGER
PLACE OF INSTALLATION
PLACE OF INSTALLATION
EXCESS GAS
COMPRESSOR BREAKDOWN
SHORTAGE OF GAS
PLACE OF INSTALLATION
TANGENTIAL FAN
PIPE
LOUVER POSITION
SHORTAGE OF GAS
MIS-INSTALLATION
DRAINAGE
TAN FAN MOTOR
MIS-WIRING
SHORT CIRCUIT OF WIRINGS
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance between two terminals [see fig.2,table 3]
check the resistance by tester [see table 2]
adjust proper temperature in remote controller
check the resistance by tester [see table 2]
check the restarting operation of compressor, after passing 3 minute
check the resistance of sensor (temp. heat exchanger)
[see table 1]
check the wiring order
if the scale of the tester swings instantly to "zero
Ω " and does
not move back to "infinity", capacitor for TAG fan motor should
be replaced [NOTE.1]
other than described above
if the scale of the tester swings instantly to "zero
Ω " and does not
move back to "infinity" TAG fan motor should be replaced [NOTE.1]
other than descrived above
check proper voltage of power supply and use an exclusive power supply
check proper voltage of power supply and use an exclusive power supply
check by eyes
check the pressure of gas [check
「 performance curve diagram 」 ]
if the scale of the tester swings instantly to "zero Ω " and does not
move back to "infinity", capacitor for compressor should be replaced
[NOTE.1]
other than described above
leak of gas, or cut off prevention for overheating relay
check the wiring order
change PCB(main controller)
other than described above
other than described above
check by eyes and clean it
check the resistance by tester [see table 2]
check the resistance by tester [see table 1]
check the blockage of air outlet of TAN
check the blockage of air inlet & air outlet of TAG
check the pressure of gas [check
「 performance curve diagram 」 ]
other than described above
check the pressure of gas [check
「 performance curve diagram 」 ]
check the blockage of air inlet & air outlet of TAG
check by eyes after power off. turn by hands and check noise
check by eyes around the pipes with any obstacles
level louver position
check the pressure of gas [checkk
「 performance curve diagram 」 ]
check the level of TAN
check the drain pipe is stopped up
if DC5V is achieved between black and brown lead wiring of fan
motor, while no voltage of pulse between white and black wiring,
then TAN fan motor should be replaced
check the voltage between 2 and 3 in terminal [see fig. 6]
check the voltage between 2 and 4 in terminals [see fig.5]
check the voltage between 2 and 4 in terminals [see fig.5]
check the wiring between 2 and 3 in terminal (not turning TAG fan)
MOTOR, TAN FAN check the voltage by tester [see fig 3]
check the fuse by eyes or cheak the electric continuity by tester
FLASHING
[NOTE.1] Measure the resistance by changing the pole of the tester by turns.
OFF
FLASHING
1 〜4 Terminal Number on Terminal Block of TAG. (outdoor unit)★
ON FLASHING OFF
FLASHING FLASHING
check the voltage between 2 and 3 in terminal [see fig. 6]
check the wiring between 2 and 3 in terminal (not turning TAG fan)
check the resistance by tester [see table 1]
TAN FAN ROTATING
DRY & COOLING OPERATION

– 19 –
TROUBLESHOOTING GUIDE
REMOTE CONTROLLER
「 ON 」 
POWER TIMER OPERATION
(green) (yellow) (green)
NO
NO
NO
NO
NO
OFF OFF OFF
ON OFF ON
ON
OR
OFF OFF
FLASHING FLASHING OFF
FLASHING FLASHING
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO NO ROTATION
SLOW ROTATION
SLIGHTLY TURN AND
STOP
NO
NO
NO
NOT WARM ENOUGH
NOT WARM ENOUGH
NOISE
REPEATED "HEATING" AND "COOLING"
TAG FAN REPEATED
"OPERATION" AND "STOP"
TAN FAN REPEATED
"OPERATION STOP"
outdoor unit stops before
reaching set up temp.
POWER SUPPLY check the plug inserted into the outlet and the power supply
REMOTE CONTROLLER
FUSE (3.15A)
TRANSFORMER
PCB (RECEIVER & DISPLAY)
if the battery is dead or failure in remote controller
change to new one
check the fuse by eyes or cheak the electric continuity by tester
check the resistance by tester [see fig.1]
other than described above [See
「 how to operate emergency
operation test operation
」 ]
OFF OFF OFF
FLASHING OFF OFF
FLASHING ON ON
"POWER LAMP" GREEN ON
LOUVER
「 OPEN 」
SENSOR, TEMP. ROOM
"OPERATION LAMP" GREEN ON
4-WAY VALVE ON
TAG FAN ROTATING
COMPRESSOR IS WORKING
SENSOR, TEMP. HEAT EXCHANGER
OPERATING IN HEATING MODE
REMOTE CONTROLLER
「 OFF 」 
TAN FAN STARTING
(HOT START MODE)
COMPRESSOR
TAN FAN STOP
TAG FAN
"OPERATION LAMP" OFF
"POWER LAMP" OFF
LOUVER
「 CLOSE 」 
STOP
4-WAY VALVE (WITH COIL) OFF
SENSOR, TEMP. HEAT EXCHANGER
SENSOR, TEMP. ROOM
MOTOR, LOUVER
SENSOR, TEMP. ROOM
SETTING TEMPERATURE
SENSOR, TEMP. ROOM
COMPRESSOR
DROP VOLTAGE
BY DROP VOLTAGE
DEFECTIVE WIRING CONTACTS
EXCESS GAS
CAPACITOR, COMPRESSOR
COMPRESSOR LOCKING
OVERHEAT PREVENTION RELAY
WRONG WIRING CONNECTION
CUTTING OFF CT
COMPRESSOR BREAKDOWN
WRONG WIRING CONNECTION
PCB (MAIN CONTROLLER)
CAPACITOR,TAG FAN MOTOR
TAG FAN MOTOR
PCB (MAIN CONTROLLER)
CAPACITOR,TAG FAN MOTOR
TAG FAN MOTOR
COMPRESSOR BREAKDOWN
PCB (MAIN CONTROLLER)
SENSOR, TEMP. HEAT EXCHANGER
FILTER IS CHOKED
SENSOR, TEMP. ROOM
SHORT CIRCUIT OF WIRINGS
SENSOR, TEMP. HEAT EXHANGER
PLACE OF INSTALLATION
PLACE OF INSTALLATION
EXCESS GAS
COMPRESSOR BREAKDOWN
SHORTAGE OF GAS
PLACE OF INSTALLATION
CROSSFLOW FAN
PIPE
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance between two terminals [see fig.2,table 3]
check the resistance by tester [see table 2]
adjust proper temperature in remote controller
check the resistance by tester [see table 2]
check by eyes
check proper voltage of power supply and use an exclusive power supply
check proper voltage of power supply and use an exclusive power supply
check the restarting operation of compressor, after passing 3 minutes
if the scale of the tester swings instantly to "zero
Ω " and does
not move back to "infinity" , capacitor for compressor should
be replaced [NOTE.1]
other than described above
other than descrived above
check the pressure of refrigerant gas[see
「 performance curve diagram 」 ]
if the scale of the tester swings instantly to "zero
Ω " and does not
move back to "infinity" , capacitor for TAG fan motor should
be replaced [NOTE.1]
if the scale of the tester swings instantly to "zero
Ω " and does not
move back to "infinity" , capacitor for TAG fan motor should
be replaced [NOTE.1]
other than described above
leak of gas, or cut off of overheat prevention relay
check the wiring order
check the wiring order
change PCB (main controller)
other than described above
check by eyes and clean it
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance by tester [see table 1]
check the blockage of air outlet of TAN
check the blockage of air inlet & air outlet of TAG
check the pressure of refrigerant gas [check
「 performance curve diagram
」
]
other than described above
check the pressure of refrigerant gas [check
「 performance curve diagram 」 ]
check the blockage of air inlet & air outlet of TAG
check by eyes after power off. turn by hands and check noise
check by eyes around the pipes with any obstacles
if DC5V is achieved between black and brown portion of lead wiring of fan
motor, while no voltage of pulse between white and black wiring, then TAN
fan motor should be replaced
UNDER "POWER SAVE" MODE (NOTHING ABNORMAL)
check the voltage between 2 and 4 in terminals [see fig.5]
check the resistance between 1 - 4 and 3 - 4 in terminal
check the voltage between 2 and 4 in terminal [see fig.5]
check the voltage between 2 and 4 in terminal [see fig.5]
check the current at wiring 1 by clamp meter [see fig.4]
check the wiring 3 , 4
OFF
1 〜4 Terminal Number on Terminal Block of TAG. (outdoor unit)★
FUSE (3.15A)
MOTOR, TAN FAN check the voltage by tester [see fig 3]
check the fuse by eyes or cheak the electric continuity by tester
ON FLASHING OFF
WRONG WIRING CONNECTION
TAN FAN MOTOR
HEATING OPERATION