Toyotomi TAN-A20EW User manual

CONTENTS
SPECIFICATION....................................................................1
FUNCTIONS ..........................................................................7
SERVICE FUNCTION EXPLANATION ..................................9
OPERATION DETAILS.........................................................10
TROUBLESHOOTING GUIDE.............................................19
PERFORMANCE CURVE DIAGRAM ..................................27
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)..........................................
SERVICE MANUAL
ROOM AIR CONDITIONER
TAN/TAG-A20EW
TAN/TAG-A28EW
TAN/TAG-A32EW

SPECIFICATION
– 1 –
TAN/TAG-A20EW
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-A20EW TAG-A20EW
7,700
8,800
1.4
18
6.5
7.0
750
710
3.5
3.4
14
0.7
1.5
265
795
175
7.2
490
640
210
24

SPECIFICATION
– 2 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
18 15
Induction (4-pole) Induction (6-pole)
W
Heat Exchanger 18.1FPI 19.5 FPI
Capillary Tube
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A)
–700(24.7)
–
OHR
–
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
TAN-A20EW TAG-A20EW

SPECIFICATION
– 3 –
TAN/TAG-A28EW
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –10,500
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 ; –
–
8.0
820
840
3.6
3.7
7.0
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''
9,000
1.6
22
14
0.7
1.5
265
795
175
7.2
545
710
255
29
SIDE VIEW
TAN-A28EW TAG-A28EW

SPECIFICATION
– 4 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
18 20
Induction (4-pole) Induction (6-pole)
W
Heat Exchanger 18.1FPI 19.5FPI
Capillary Tube
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A)
–830(29.3)
–
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
TAN-A28EW TAG-A28EW

SPECIFICATION
– 5 –
TAN/TAG-A32EW
Unit
BTU/hCooling Capacity
INDOOR OUTDOOR
–
BTU/hHeating Capacity –13,500
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/ 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''
11,500
2.1
27
8.0
9.7
1,050
1,010
4.7
4.5
14
0.7
1.5
265
795
182
8.3
545
710
255
33
SIDE VIEW
TAN-A32EW TAG-A32EW

SPECIFICATION
– 6 –
Unit
Air Circulation
INDOOR OUTDOOR
Cross-flow Fan Propeller Fan
22 20
Induction (4-pole) Induction (6-pole)
W
Heat Exchanger 19.5FPI 19.5 FPI
Capillary Tube
Plate fin configuration,forced draft
Refrigerant Control Device g (oz)
Refrigerant (R410A)
–1,100(38.8)
–
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
TAN-A32EW TAG-A32EW

– 7 –
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

– 8 –
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
When ON/OFF BUTTON is pressed, the
vertical louver will move to the adequate
positions for each operation automatically.
Manual operation.
The louver starts vertical swing with a
push of the LOUVER BUTTON. Push the
LOUVER BUTTON once again to stop
the louver at the desired position while
swinging.
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,protector ★1 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
★1OHR(Over Heat Relay) ••••
INNER PROTECTOR •••••
TAN/TAG-A20EW
TAN/TAG-A28EW, TAN/TAG-A32EW

– 9 –
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.
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 “R7” on the PC board.(7K, 9K, 12Kmodel)
(Each Operations Details)
EMERGENCY AND TEST OPERATION
SERVICE FUNCTION EXPLANATION
Beep
Twice beep
<Remote control unit> <Indoor unit>
Receive
Ex-factory setting (Mode A) Ex-factory setting (Mode A)
Cut R7 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
INTERFERENCE PREVENTION OF SIGNALS FROM THE REMOTE CONTROLLERS
•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.