Zibro S2035 User manual

2
SERVICE MANUAL
4
S2035 - S2041 - S2053

SPECIFICATION
– 1 –
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –
L/h
phase
Moisture Removal –
Power source
Single
V230
Hz 50
OUTLET
Airflow Method
SIDE VIEW 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/ 1 mm –
mm
Dimensions mm
mm
kg
Net Weight
3
2
; Half Union 1/4''
; Half Union 3/8''
L (liquid side) ; 1/4''
G (gas side) ; 3/8''
; 2-way valve 1/4''
; 3-way valve 3/8''
L (liquid side) ; 1/4''
G (gas side) ; 3/8''
TAN-A28EWI TAG-A28EWI
10,000(2,700-12,000)
13,200(2,400-18,000)
1.6
3.4
9.0
11.0
660
765
2.9
3.4
14
0.6
1.4
295
799
210
9.1
550
780
278
35

SPECIFICATION
– 2 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
30 40
DC brushless(8-pole) DC brushless (8-pole)
W
Heat Exchanger 21.2FPI 18.1 FPI
Expansion Valve
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A )
–1,100(38.8)
–
Thermostat
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
7 Gum Bushing (2 pcs.)
8 Vibration proof rubber (4 pcs.)
Timer –
Real time dual ON/OFF
7-hour OFF
TAN-A28EWI TAG-A28EWI

SPECIFICATION
– 3 –
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –
L/h
phase
Moisture Removal –
Power source
Single
V230
Hz 50
OUTLET
Airflow Method
SIDE VIEW 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/ 1 mm –
mm
Dimensions mm
mm
kg
Net Weight
3
2
; Half Union 1/4''
; Half Union 3/8''
L (liquid side) ; 1/4''
G (gas side) ; 3/8''
; 2-way valve 1/4''
; 3-way valve 3/8''
L (liquid side) ; 1/4''
G (gas side) ; 3/8''
12,500(2,700-14,100)
17,100(2,400-20,700)
1.7
5.0
9.5
12.5
885
1,130
3.9
5.0
14
0.6
1.4
295
799
210
9.1
550
780
278
35
TAN-A32EWI TAG-A32EWI

SPECIFICATION
– 4 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
30 40
DC brushless(8-pole) DC brushless (8-pole)
W
Heat Exchanger 21.2FPI 18.1 FPI
Expansion Valve
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A )
–1,100(38.8)
–
Thermostat
Air Filter
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
7 Gum Bushing (2 pcs.)
8 Vibration proof rubber (4 pcs.)
Timer –
Real time dual ON/OFF
7-hour OFF
Parts Provided
TAN-A32EWI TAG-A32EWI

SPECIFICATION
– 5 –
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –
L/h
phase
Moisture Removal –
Power source
Single
V230
Hz 50
OUTLET
Airflow Method
SIDE VIEW 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 3/8''
L (liquid side) ; 1/4''
G (gas side) ; 3/8''
; 2-way valve 1/4''
; 3-way valve 3/8''
L (liquid side) ; 1/4''
G (gas side) ; 3/8''
17,700(1,700-18,800)
23,800(1,700-33,400)
2.8
8.1
14.0
15.0
1,845
1,800
8.1
7.9
14
0.6
2.3
295
799
210
9.5
550
780
278
35
TAN-A53EWI TAG-A53EWI

SPECIFICATION
– 6 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
30 40
DC brushless(8-pole) DC brushless (8-pole)
W
Heat Exchanger 21.2FPI 18.1 FPI
Expansion Valve
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A )
–1,100(38.8)
–
Thermostat
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
7 Photo-Catalytic Anti-Odor filter (2 pcs.)
8 Static,Catechin filter (2 pcs.)
9 Gum Bushing (2 pcs.)
Timer –
Real time dual ON/OFF
7-hour OFF
TAN-A53EWI TAG-A53EWI

– 7 –
REMOTE-CONTROL TRANSMITTER
ON/OFF
Operation mode selection
COOL
DRY
HEAT
AUTOMATIC
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
AUTOMATIC
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

– 8 –
OUTDOOR UNIT
Inverter control
Inverter control reduce the ON/OF times
of compressor,so can keep the room
temperature changeless during
operation.
Electricity consumption
Inverter control can operate with less
electricity consumption than normal air
conditioner.
Deice(Defrost) control
(for outdoor unit panel)
Deice operation automatically starts
when the outdoor temperature is lower
than 2℃and the ice is formed on the
bottom of outdoor unit.
Hot-start control (heating)
The indoor fan stops until the evaporator
piping temperature will be reached.
Anti-freezing control for the
evaporator
Compressor will be stopped when the
evapolator’s piping temperature is below
2℃for one minute.
Compressor will be restarted when the
evaporator’s piping temperature is above
2℃.
Airflow direction control
Automatic airflow direction control
The louver automatically swings up and
down (cooling, dry)...horizontal and 35°
downward.
The louver is set at 70°downward
during heating operation.
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.
FUNCTIONS

– 9 –
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, beep 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 twice beep, 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
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 EMERGENCYAND 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 modeA)
•Remote controller side : Have “J1” on the PC board short-circuited by soldering.
•Indoor unit side : Cut “R13” on the PC board.
Twice beep
Beep

– 10 –
TIMER OPERATION
ON Timer operation
•Press the ON/OFF switch. Right after replacing new batteries, set the present time in advance.
•Set the “ON Time” : Press the “TIMEADJ” button twice.
Adjust the time with the “ , ” button.
Press the “TIME ADJ” button twice.The setting of “ON Time” is completed 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. Right after replacing new batteries, set the present time in advance.
•Set the “OFF Time” : Press the “TIME ADJ” button 3 times.
Adjust the time with the “ , ” button.
Press the “TIME ADJ” button once.The setting of “OFF Time” is completed 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 designated 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.
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.
OPERATION DETAILS
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

– 11 –
AIRFLOW DIRECTION CONTROL
Horizontal Adjustment
Swing of Air Flow
The horizontal louver will keep moving steadly right and left if the horizontal louver button is pressed once.
Fixing the Flow Direction
The horizontal louver will come to a halt if the horizontal louver button is pressed once again.
NOTICE :
•Dew drops may appear at the outlet under high humidity(e.g.during rainy season) if the system is operated
with the horizontal louver faced to the extreme right or left.
•Use the wireless remote control unit without fail to change the angle of the horizontal louver. The horizontal
louver may move out of the normal range if forced by hands.
OPERATION DETAILS
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 6 minutes of its operation even if the room temperature reaches to
the designated temperature, except changing setting temperature.
-1˚C
MAX
★2
MAX
★2
MIN★3MIN★3
0˚C
0Hz
Frequency of
compressor
Designated
temperature
Room temperature
TAN/TAG-A28EWI, TAN/TAG-A32EWI
TAN/TAG-A53EWI
★1
40
120
★2
90Hz
100Hz
★3
24Hz
10Hz
COOLING MODE OPERATION
•The compressor will stop when operational frequency reached the minimum frequency and that condition has
been kept for 6 minutes and the room temperature becomes 1℃lower than it was set.
•The compressor will re-start when room temperature becomes 0℃higher than it was set.
•The operational frequency will be set every ★1 seconds of operation.
The operational frequency setting will be calculated based on the deviation of the room temperature and the
set temperature on one end and the deviation factor at the time of previous setting on another.
TAN/TAG-A53EWI

– 12 –
OPERATION DETAILS
DRY MODE OPERATION
•Compressor stops when the room temperature fall to 0.3°C lower than the designated temperature
continuously for 2 minutes.
•Compressor restarts when room temperature rises to the designated temperature.
•The operating frequency of the compressor is determined according to the room temperature
(see the diagram below).
98Hz 90Hz
70
66
62
58
5252 4848
Operating 
frequency of 
compressor
Indoor fan
Indoor fan
Selected
speed Selected speed
Super
low Super low
OFF
(3min.)
Designated
Fan blow Designated Fan blow
Super
low Super low
Stop
-0.7
+1.0
+1.7
+2.7
+3.3
+4.0
+4.7
+5.3
+6.0

+0.0
2min.
Designated
temperature
Room temperature
TAN/TAG-A28EWI, TAN/TAG-A32EWI

– 13 –
OPERATION DETAILS
Operating 
frequency of 
compressor
MAX 30Hz MAX 30Hz
MIN15Hz
DRY MODE OPERATION
•During dry mode operation, both motors (TAN,TAG) run proportionally according to the temperatures (indoor,
outdoor).
•The compressor runs continuously while unit is operating. (see the diagram below)
TAN/TAG-A53EWI

– 14 –
OPERATION DETAILS
+3.7
30˚C
35˚C
15˚C
MAX
★1
MAX
★1
MIN★2MIN★2
+4.7
0Hz
Super
Low
Frequency of
compressor
Designate Fan blowLow Low or Super low Designated Fan blow
Designated
temperature Room temperature
Stop
Temperature,
indoor heat
exchanger
Indoor fan
★1
110Hz
112Hz
★2
24Hz
10Hz
TAN/TAG-A28EWI, TAN/TAG-A32EWI
TAN/TAG-A53EWI
HEATING MODE OPERATION
•The compressor will stop when operational frequency reached the minimum frequency and that condition has
been kept for 6 minutes and the room temperature becomes 4.7℃higher than it was set.
•The compressor will re-start when room temperature becomes 3.7℃higher than it was set.
•The operational frequency will be set every 80 seconds of operation.
The operational frequency setting will be calculated based on the deviation of the room temperature and the
set temperature on one end and the deviation factor at the time of previous setting on another.

– 15 –
Compressor
Outdoor fan
4way valve
ON OFF OFF
ON
ON
ON
ON
50Hz 67Hz
MAX
★
2min.
3min. 2min.
50sec.
50sec.
53sec. Max 12min. 53sec.
10
sec.
2min.
-2˚C
8˚C
Defrosting starts Defrosting stop
Temperature of
outdoor heat exchanger
★
90Hz
86Hz
TAN/TAG-A28EWI, TAN/TAG-A32EWI
TAN/TAG-A53EWI
DEFROSTING OPERATION(FOR OUTDOOR UNIT HEAT EXCHANGER)
•Defrosting operation is controlled by the temperature of outdoor heat exchanger sensed by the thermistor and
the timer switch.
•Defrosting operation starts when the both of the following conditions are met at the same time.
a) 40 minutes’ of continuous run of the compressor after the start of heating operation or after the completion
of previous defrosting operation.
b) the temperature of the outdoor heat exchanger stays lower than -2°C continuously for two minutes.
•Defrosting operating is called off if either of the following conditions is met.
a) The temperature of outdoor heat exchanger rises to 8°C while 4-way-valve is ON.
b) 12 minutes has passed since compressor turned ON.
OPERATION DETAILS

– 16 –
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 take 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.

– 17 –
TROUBLESHOOTING GUIDE
INDICATION LAMP
Micro computer self-diagnose the points of the troubles and inform it by the combination of the status (On, Flush, or
Off) of three lamp indicators on the front panel of the indoor unit.
ALARM
INDICATION TIME APPEARANCE, PORTION, PARTS
SEEMED WRONG
MOMENTARY STOP OF POWER
(IN CASE OF LIGHTNING)
DROP OF POWER VOLTAGE
check the plug inserted into the outlet and the power supply
emergency operation (display of remote controller is faint or not)
check the electric continuity by tester
check the electric continuity by tester
emergency operation
other than described above
15 sec. later after main power on, if alarm indication appears, PCB
(TAN main) should be replaced
check the current fuse (1A) on the wiring (red) for fan motor (TAN)
by tester
if the current fuse is cut, fan motor(TAN) is defective
if not, fan motor(TAN) or PCB (TAN main) is defective
check the power voltage (230V)
check the voltage of fan motor [see fig.2]
METHOD OF CHECK
(press the ON/OFF button of remote controller in case of reset)
POWER
(green) TIMER (yellow)
OPERATION
(green)
INDICATION LAMP
OFF OFF OFF
TAN, TAG do not work at all
FLASHING OFF OFF
FLASHING ON ON
ON ON FLASHING
FLASHING ON OFF
alarm indication appears
immediately when press
operation switch
OFF OFF FLASHING
FLASHING
OFF FLASHING
TAN, TAG don’t work at all,
and after 20 sec., operation
lamp is flashing (2 min. in
case of power on)
normal lamp indication
turn alarm when
something is wrong with
TAN, TAG
error of transmission
CT disconnection
OFF FLASHING OFF
FLASHING FLASHING OFF
OFF
or
30 〜40 min. later after
compressor start, the yellow
lamp is flashing and TAN,
TAG stop running
sensor discharge operate
because temperature of
discharge tube beyond
120°C, or sensor
discharge is bad quality
protective action against
excessive AC current
detection
FLASHING FLASHING ON
FLASHING ON
FLASHING
once stop running with
power lamp lighting when
something is wrong with
TAN, TAG, and start
running again after 3 〜
20 min.
later after that in case of
reoccurrence, alarm
indication appears
protective action against
excessive DC current
detection
or
abnormal revolution of
compressor
in case of heating
operation, a rise of
temperature (above 58°C)
of RC heat exchanger or
less quantity of RC blow
FLASHING FLASHING
OFF
FLASHING ON
ON
FLASHING
FLASHING
in case of heating operation,
after a few minutes operation,
all lamps are flashing and
TAN, TAG stop running
15 sec. later after main
power on, or 60 sec.
later after start running
through remote controller,
alarm indication appears
40 〜70 sec. later after
start running, alarm
indication appears
90 sec. later after
start running, alarm
indication appears

accident of controller
accident of fan motor
short or open of sensor,
temperature or incomplete
insertion of connector
PCB (TAN MAIN)
PCB (TAG MAIN)
FAN MOTOR (TAG)
FAN MOTOR (TAN)
SENSOR, TEMP. ROOM
SENSOR, TEMP. HEAT EXCHANGER
SENSOR, TEMP. DEFROST
SENSOR, TEMP. DISCHARGE
FILTER IS CHOKED
SENSOR, TEMP. HEAT EXCHANGER
PCB (TAN MAIN)
UNREASONABLE OPERATION
UNDER OVERLOAD
MOMENTARY STOP OF POWER
(IN CASE OF LIGHTNING)
DROP OF POWER VOLTAGE
PCB (TAG MAIN)
ACCIDENT OF POWER MODULE
COMPRESSOR LOCKING
POWER SUPPLY
REMOTE CONTROL
FUSE(3.15A)
TAN TERMINAL BLOCK
PCB (RECEIVER & DISPLAY)
PCB (TAN MAIN)
MIS-WIRING (TAG-TAN CONNECTING
CABLE) OR RARE CONTACT
CUTTING OFF CT
CURRENT FUSE . (25A) FUSING
(ON THE PCB (TAG MAIN))
GAS LEAKAGE
VALVE, SERVICE IS CLOSED
PIPE
SENSOR, TEMP. DISCHARGE
check the place of installation (blockage of air inlet & outlet of TAN,
TAG) check the excessive gas
check the movement by reoperation
check the power voltage (230V)
UNREASONABLE OPERATION
UNDER OVERLOAD
check the place of installation (blockage of air inlet & outlet of TAN,
TAG) check the excessive gas
check by eyes and clean it
check the resistance by tester [see table 2]
other than described above
check the movement by reoperation
check the power voltage (230V)
See Flow Chart (P19)
change the PCB (TAG main)
check the wiring connection and rare contact
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance by tester [see table 2]
check the resistance by tester [see table 3]
check the point of leakage (discharge temperature rise in case of
small leakage), measure the pressure of compressor during fixed
operation (operation frequency 58 Hz)
check the valve by eyes
check by eyes
check the resistance by tester [see table 3]
check the electric continuity between 1 and 5 in connector by
tester.[see fig. 1]
(if it is no continuity, both PCB (TAG main) and power module
should be replaced.)
check the current fuse 250V3.15A on the PCB (TAG main) by tester
if it is burnt down fan motor (TAG) is defective
if not, fan motor(TAG) or PCB (TAG main) is defective
60 sec. later after start running through remote controller, if alarm
indication appears, PCB (TAG main) should be replaced
--
check the drain hose by eyes (it might be folded or choked)
check the TAN whether lean or not
not cool down
not warm up
water leakage
louver doesn' t work
※ In this table TAN means indoor unit and TAG means outdoor unit.
check the resistance by tester [see fig.4]
check the point of leakage measure the pressure of compressor
during fixed operation (operation frequency 58 Hz)
nasty smell
FILTER IS CHOKED
NO USE FOR A LONG TIME
NASTY SMELL
(CIGARETTE, FURNITURE, ETC.)
DRAINAGE
MIS-INSTALLATION
LOUVER MOTOR
GAS LEAKAGE
SENSOR, TEMP. ROOM
SENSOR, TEMP. HEAT EXCHANGER
4-WAY VALVE
SHORT CYCLE
(INSUFFICIENT AIR CIRCULATION)
check by eyes and clean it
use deodorizer
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance by tester [see fig.3]
check the blockage of air inlet & outlet of TAN, TAG
--- -
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--- -
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TAN/TAG-A28EWI, TAN/TAG-A32EWI

– 18 –
TROUBLESHOOTING GUIDE
CHECK A FOLLOWING STEPS
〔fig. 2〕Voltage of TAN fan motor on the PCB(TAN main)
〔fig. 1〕Continuity of current fuse on the PCB (TAG main)
0Ω
0Ω
FUSE
FUSE
＋ −
BL
PCB(TAG main)
TAN fan motor connector
RYBW
4-way valve coil
1.5kΩ
common terminal
360〜390Ω
power module
PCB(TAN main)
is Normal
Measure the voltage between
the connector pins in the back
of PCB (TAN main) during
cooling operation.
〔fig. 3〕Resistance of 4-way valve coil
〔fig. 4〕Resistance of louver motor 〔fig. 5〕Resistance of Power module
Normal:1.5kΩ
※Take off the connector and check the Resistance
of 4-way valve coil
Normal:360〜390Ω
Take off the connector and check the resistance between
the teminals
Measure the resistance, six times between U-V, V-W, W-U respec-
tively by changing the polarity,and if all the figures show infinite (more
than hundreds of kΩ) then it is normal condition.
if not, it is defective.
Take off the connectors 1 & 5 on the PCB (TAG main), and
check the continuity.
between red ＋and black −approx.DC325V
between yellow ＋and black −approx.DC3〜5V
between white ＋and black −approx.DC15V
PCB(TAG main)
15
16
DC12V±2V
＋
＋ −
DC22V±3V
7
−
(1)
(1)
(7)
(8)
PCB(TAG main)
15
7
16
−
＋ ＋
−
(1)
(1)
(7)
(8)
over1kΩ
over1kΩ
〔fig. 6〕Voltage of Power module 〔fig. 7〕Resistance of PCB(TAG main)
Measure both voltages as follows
without taking off the connectors.
between 7 in the 16 and 1
in the 15 approx. DC 12V±2V
between 6 in the 15 and 7
approx. DC 22V±3V
Measure both resistances as follows
after taking off the connectors.
between 7 in the 16 and 1 in the
15 approx. over 1kΩbetween 6
in the 15 and 7 approx. over 1kΩ
PCB(TAG main) is normal.
Both power module
and PCB (TAG main)
are normal
TAN/TAG-A28EWI, TAN/TAG-A32EWI

– 19 –
TROUBLESHOOTING GUIDE
METHOD OF CHECK
DC current detection and in case of irregular work of compressor
check the damage of piping, excess gas
check the resistance of power module [see fig.5]
[see fig.6]
[see fig.7]
normal
accident of compressor
accident of PCB(TAG main)
accident of power module
take off the connectors 15 & 16
normal
normal
NO
NO
YES
YES
accident of power module
check the voltage (230V) between
1 and 2 in terminal of TAG, and check
the voltage of power module
check the voltage (230V) between
1 and 2 in terminal of TAG, and check
the voltage of power module
NO
YES
Flow Chart
TAN/TAG-A28EWI, TAN/TAG-A32EWI