Toshiba RAS-M10YDV-E, RAS-M13YDCV-E, RAS-M16YDCV-E, RAS-M13YDV-E, RAS-M10YDCV-E SERVICE MANUAL
Heat Pump Model Cooling Only Model
RAS-M10YDV-E RAS-M10YDCV-E
RAS-M13YDV-E RAS-M13YDCV-E
RAS-M16YDV-E RAS-M16YDCV-E
R410A
PRINTED IN JAPAN, Jul., 2002 ToMo
CONTENTS
APPLICATION .........................................................................................................................2
1. PRECAUTIONS FOR SAFETY........................................................................................3
2. SPECIFICATIONS ...........................................................................................................5
3. CONSTRUCTION VIEWS ................................................................................................7
4. WIRING DIAGRAM ..........................................................................................................8
5. SPECIFICATIONS OF ELECTRICAL PARTS .................................................................9
6. REFRIGERANT CYCLE DIAGRAM ..............................................................................10
7. CONTROL BLOCK DIAGRAM ......................................................................................11
8. OPERATION DESCRIPTION.........................................................................................12
9. INSTALLATION PROCEDURE......................................................................................22
10. DRAIN-UP KIT...............................................................................................................37
11. WIRED REMO TE CONTROLLER .................................................................................41
12. HO W TO DIA GNOSE THE TROUBLE............................................................................45
13. HOW TO REPLACE THE MAIN PARTS ........................................................................57
14. EXPLODED VIEWS AND PARTS LIST .........................................................................59
APPLICATION
1. Combination List of Indoor/Outdoor Units (¡: Possible ×: Impossible)
Indoor unit
Outdoor unit
Heat Pump
Model 3M26YAV-E
RAS-
Cooling Only
Model 3M23YACV-E
RAS-
2. File No. List of Reference Service Manual (Outdoor Units of Multi Air Conditioner)
Outdoor unit
Heat Pump
Model 3M26YAV-E
RAS-
Cooling Only
Model 3M23YACV-E
RAS-
4M27YAV-E
M18YAV-E
4M27YACV-E
M18YACV-E
4M27YAV-E
M18YAV-E
4M27YACV-E
M18YACV-E
Heat Pump Model RAS- Cooling Only Model RAS-
M10YDV-E M13YDV-E M16YDV-E M10YCDV-E M13YCDV-E M16YCDV-E
¡¡¡×××
¡¡¡×××
¡¡××××
××ס¡¡
××ס¡¡
××ס¡×
Reference Service Manual
File No. A01-0004
File No. A01-0004
File No. A00-9906
File No. A01-0004
File No. A01-0002
File No. A00-9906
3. For the details of the specifications of each
indoor/outdoor unit to be combined, refer to the
next page and after pages with the above service
manuals.
4. Optional Parts List
Product name
Drain-up kit
Wired remote controller
– 2 –
Model name
RB-F81E
RBC-SH-A1LE
1. PRECAUTIONS FOR SAFETY
For general public use
Power supply cord of Outdoor unit shall be more than 2.5mm² (H07RN-F or 245 IEC66) polychloroprene
sheathed flexible cord.
• Read this “Precautions f or Safety” carefully before servicing.
• The precautions described below include the important items regarding safety. Observe them without fail.
• After the servicing work, perform a trial operation to check for any problem.
• Turn off the main power supply switch (or breaker) before the unit maintenance.
CAUTION New Refrigerant Air Conditioner Servicing
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.
The characteristics of R410A refrigerant is easy to absorb water, oxidizing membrane or oil, and its pressure
is approx. 1.6 times of refrigerant R22. Accompanied with adoption of the new refrigerant, refrigerating oil
has been also changed. Therefore, during servicing work, be sure that water, dust, former refrigerant, or
refrigerating oil does not enter into the refrigerating cycle of new refrigerant air conditioner.
To prev ent from mixing of refrigerant and refrigerating oil, the sizes of connecting sections of charging port of
the main unit or installation tools are different from those f or the conventional refrigerant.
Accordingly, the exclusive tools are required for the new refrigerant (R410A).
For connecting pipes, use ne w and clean piping materials with high pressure-tight f orce, which were made for
R410A only, so that water or dust does not enter. Moreover, do not use the existing piping because there are
problems about pressure-tight force and impurity it.
CAUTION To Disconnect the Appliance from the Main Power Supply.
This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a
contact separation of at least 3 mm.
If this is not possible, a power supply plug with grounding must be used. This plug must be easily accessible
after installation. The plug m ust be disconnected from the po w er supply socket in order to disconnect the
appliance completely from the mains.
The installation fuse (25A D type ) must be used for the power supply line of this conditioner.
W ARNINGS
• Ask an authorized dealer or qualified installation professional to install/maintain the air
conditioner.
Inappropriate servicing may result in water leakage, electric shock or fire.
• Turn off the main power supply switch or breaker before attempting any electrical work.
Make sure all power switches are off. Failure to do so may cause electric shock.
• Connect the connecting cable correctly.
If the connecting cable is connected by wrong way, electric parts may be damaged.
• When moving the air-conditioner for installing it in another place again, be very careful not to
get the specified refrigerant with any other gaseous body into the refrigeration cycle.
If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes
abnormally high and it resultingly causes burst of the pipe and injuries on persons.
– 3 –
• Never modify this unit by removing any of the safety guards or by by-passing any of the
safety interlock switches.
• Exposure of unit to water or other moisture before servicing may cause a short circuit.
Do not store it in a wet basement or expose to rain or water.
• After unpacking the unit, examine it carefully for possible damage.
• Do not install in a place that can increase the vibration of the unit.
• To avoid personal injury, be careful when handling parts with sharp edges.
• Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire .
• When installing the air conditioner in a small room, provide appropriate measures to ensure
that the concentration of refrigerant in the room does not exceed the critical level should
leakage occur.
It is not dangerous refrigerant; it has not toxicity or combustibility. However, a concentration above 0.3kg/m³
as criterion still causes suffocation. The volume of refrigerant charged to the Multi System air conditioner is
more than the volume charged to a con ventional individual system.
• Install the air conditioner securely in a location where the weight of the unit can be sustained
adequately.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
• If refrigerant gas has leaked during the servicing work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.
• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas
may generate.
• The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive circuit.
An insufficient circuit capacity or inappropriate installation may cause fire.
• When wiring, use the specified cables and connect the terminals securely to prevent external
forces applied to the cable from affecting the terminals.
• Be sure to provide grounding.
Do not connect ground wires to gas pipes, water pipes , lightning rods or ground wires for telephone cables.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
• Do not install the air conditioner in a location subject to a risk of exposure to combustible
gas.
Otherwise, the combustible gas leaks, stays around the unit and a fire may occur.
– 4 –
2. SPECIFICATIONS
RAS-M10YDV-E, RAS-M13YDV-E, RAS-M16YDV-E (Heat Pump Model)
Indoor unit model name
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply (Ø-V-Hz)
Electric characteristics
2
*
Blower unit
Sound level *4
Dimension Width (mm)
Net weight (kg)
Connecting type
Connecting pipe
Refrigerant
Wiring connection Interconnection
Usable temperature range (°C)
Accessory
Operation current (A)
Power consumption (W)
Power factor (%)
Blower
Blower motor output (W)
Blower speed
Air flow (Cooling High *3) (m³/h)
Air flow (Heating High *3) (m³/h)
External static pressure (Pa)
(Upper limit)
External static pressure (Pa)
(Standard)
Cooling (high) (dB)
Cooling (Medium) (dB)
Cooling (Low) (dB)
Heating (high) (dB)
Heating (Medium) (dB)
Heating (Low) (dB)
Height (mm)
Depth (mm)
Liquid side (mm)
Gas side (mm)
Wireless remote controller
Remote controller holder
Mounting screws
Drain hose
Elbow thermal-insulation cover
Batteries (Manganese)
Black screws
Tapping screws
Owner’s manual
Installation manual
RAS-M10YDV-E RAS-M13YDV-E RAS-M16YDV-E
2.7 3.7 4.5
1
*
4.0 5.0 5.5
1
*
1Ø 220 – 240 V, 50 Hz / 220 V, 60 Hz
Multi-blade blower
5 (Low, Low+, Med, Med+, High)
720 780 780
720 780 780
54.9 63.7 63.7
(5.6 mmAq) (6.5 mmAq) (6.5 mmAq)
35.3 41.2 41.2
(3.6 mmAq) (4.2 mmAq) (4.2 mmAq)
31 32 33
27 28 29
23 24 25
32 33 34
28 29 30
24 25 26
Ø6.35 Ø6.35 Ø6.35
Ø9.52 Ø9.52 Ø12.7
4 wires : includes earth
1
*
1
*
0.59
110
81
60
750
230
440
19
Full Operation
R410A
21 – 32 / 0 – 28
1
1
2 (Ø3.5 x 16 L)
1
1
2
2
16
1
1
1
*
1
*
1 : Refer to the service manual of the outdoor unit to be combined.
*
2 : Electrical characteristics at High fan speed under standard static pressure.
*
3 : Airflow volume at standard static pressure.
*
4 : Sound levels at standard static pressure are measured under the conditions specified by JIS B 8616.
*
Notes :
• For performance when each indoor unit combined with other unit, refer to the service manual of outdoor unit.
• The specification may be subject to change without notice for purpose of improvement.
– 5 –
RAS-M10YDCV-E, RAS-M13YDCV-E, RAS-M16YDCV-E (Cooling Only Model)
Indoor unit model name
Cooling capacity (kW)
Cooling capacity range (kW)
Power supply (Ø-V-Hz)
Electric characteristics
2
*
Blower unit Air flow (Cooling High *3) (m³/h)
Sound level *4 Cooling (Medium) (dB)
Dimension Width (mm)
Net weight (kg)
Connecting type
Connecting pipe
Refrigerant
Wiring connection Interconnection
Usable temperature range (°C)
Accessory
Operation current (A)
Power consumption (W)
Power factor (%)
Blower
Blower motor output (W)
Blower speed
External static pressure (Pa)
(Upper limit)
External static pressure (Pa)
(Standard)
Cooling (high) (dB)
Cooling (Low) (dB)
Height (mm)
Depth (mm)
Liquid side (mm)
Gas side (mm)
Wireless remote controller
Remote controller holder
Mounting screws
Drain hose
Elbow thermal-insulation cover
Batteries (Manganese)
Black screws
Tapping screws
Owner’s manual
Installation manual
RAS-M10YDCV-E RAS-M13YDCV-E RAS-M16YDCV-E
2.7 3.7 4.5
1
*
1Ø 220 – 240 V, 50 Hz / 220 V, 60 Hz
Multi-blade blower
5 (Low, Low+, Med, Med+, High)
720 780 780
54.9 63.7 63.7
(5.6 mmAq) (6.5 mmAq) (6.5 mmAq)
35.3 41.2 41.2
(3.6 mmAq) (4.2 mmAq) (4.2 mmAq)
31 32 33
27 28 29
23 24 25
Ø6.35 Ø6.35 Ø6.35
Ø9.52 Ø9.52 Ø12.7
4 wires : includes earth
1
*
0.59
110
81
60
750
230
440
19
Full Operation
R410A
21 – 32
1
1
2 (Ø3.5 x 16 L)
1
1
2
2
16
1
1
1
*
1 : Refer to the service manual of the outdoor unit to be combined.
*
2 : Electrical characteristics at High fan speed under standard static pressure.
*
3 : Airflow volume at standard static pressure.
*
4 : Sound levels at standard static pressure are measured under the conditions specified by JIS B 8616.
*
Notes :
• For performance when each indoor unit combined with other unit, refer to the service manual of outdoor unit.
• The specification may be subject to change without notice for purpose of improvement.
– 6 –
230
156.5
228
(Inside flange)
Duct connecting flange
(Require at site)
3. CONSTRUCTION VIEWS
650 (Inside flange)
Drain piping connecting port
(Nominal Ø20 Vinyl chloride pipe)
31
730 (Hanging bolt pitch)
Drain-up kit
RB-F81E
(Accessory sold separately)
200
142
440
Duct connecting flange
(Require at site)
216.2
(Inside flange)
750
640 (Inside flange)
29.7
350
(Hanging bolt pitch)
Gas side D
Model
M10
M13
19.7
M16
24.5
612
40
118 211
Refrigerant pipe
connecting port
(Liquid side Ø6.35)
D
Ø9.52
Ø12.7
– 7 –
13
4. WIRING DIAGRAM
INFRARED RAYS
RECEIVING AND
INDICATING PARTS
1
BLK
9
9
WHI
8
8
GRY
7
7
GRN
6
6
BLU
5
5
YEL
4
4
3
2
1
(TC)
(TA)
212
ORN
3
RED
2
BRW
1
BLK
BLK
BLK
BLK
BLK
1
BLK
MCC-605
SWITCH P.C. BOARD
HEAT
EXCHANGER
SENSOR
THERMO
SENSOR
FLOAT
SWITCH
1
2
3
4
5
9
8
7
6
5
4
3
2
1
212
212
4
WHI
1
BLK
2
RED
3
BLU
4
BLU
5
1 2
3 4 5
1 2 3 4 5
CN11
9
8
7
6
5
CN05
4
3
2
1
1
CN12
1
CN13
MAIN P.C. BOARD
1
CN07
2
MCC-875
CN09
TRANSFORMER
YEL
BLK
BLU
ORN
1 2
1 2
CN17 CN04 CN03
1 2
1 2 1 2 3
CN20
3
FUSE
T6, 3A, AC 250V
CN01
R01
RY01
R02
R03
4321
MF-CAPA
CN19
CN06
CN30
SG01
CN15
CN14
P02P03
1
3
1
3
5
3
1
3
2
1
5
RED
WHI
1
3
1
3
WHI
BLK
RED
BLU
PUR
GRY
RED
BLK
WHI
GRY
GRY
BLK
4
4
RED
2
2
WHI
1
1 2
BLU
3
3
PUP
2
2
GRY
1
1
1Ø
AC220 –240V / 50Hz
AC220V / 60Hz
EARTH
CONNECTION
CABLE
2
EARTH
INDOOR
TERMINAL
BLOCK
1
313
DRAIN-PUMP
MOTOR
DRAIN-UP KIT
(OPTION)
BLK
3
3
WHI
2
RED
1
1
BLU
3
3
PUR
2
2
GRY
1
1
FAN MOTOR
Table 4-1-1 Quick check for failure diagnosis
Check items
OPERATION
1
indicator
Terminal
2
block
Fuse
3
6.3A
DC 5V
4
DC 12V
5
Check to see if the OPERATION indicator goes on and off when the main
switch or breaker is turned on. (Check the transformer and receiver unit.)
Check the power supply voltage between and . (Refer to the name
plate.) (Check the primary and secondary voltage of the transformer.)
Check for fluctuate voltage between
Check to see if the fuse blows out.
(Check the R01 of the Varistor.)
Check the voltage between and on CN11 connector.
(Check the transformer and the power supply circuit of the rated voltage.)
Check the voltage between and on CN14 connector.
(Check the transformer and the power supply circuit of the rated voltage.)
Diagnosis result
Refer to the service data for the detailed failure diagnosis.
– 8 –
and .
Color
Identification
BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
PNK : PINK
ORN : ORANGE
GRN : GREEN
PUR : PURPLE
GRN : GREEN &
&YEL YELLOW
5-1. Indoor Unit
5. SPECIFICATIONS OF ELECTRICAL PARTS
No.
1
Fan motor (for indoor)
2
Thermo. sensor (TA-sensor)
3
Transformer
4
Microcomputer
5
Heat exchanger sensor
(TC-sensor)
6
Line filter (L02)
Running capacitor
7
(for indoor fan motor)
8
Fuse (F01)
9
Varistor (R01, R02, R03)
10
Drain pump control relay
Parts name
Type
MF-200-60-4B
( – )
TT-03-3
TMP87PM40AN
( – )
HF-2430-253Y0R8
CMPS45B155UYF
CMPS45B305UYF
TSCR6.3A
15G561K
G2R-1-H
Specifications
Output (Rated ) 60W, 4 pole, 1 phase,
220 – 240, 50Hz/220, 60Hz
Winding resistance (Ω)
at 20°C
10kΩ at 25°C
AC 240V, Secondary DC 15V/DC 500mA
10kΩ at 25°C
25mH, AC 0.8A
1.5µF, AC 450V (M10, M13)
3.0µF, AC 450V (M16)
T6.3A, AC 250V
560V
10A, AC 250V
M coil A coil
73.8 100
– 9 –
6. REFRIGERANT CYCLE DIAGRAM
RAS-M10YDV-E, RAS-M10YDCV-E
RAS-M13YDV-E, RAS-M13YDCV-E
Connecting pipe
Thickness : 0.8mm
Ø9.52
RAS-M16YDV-E, RAS-M16YDCV-E
INDOOR UNIT
Evaporator
TA
•
Multi-blade fan
Connecting pipe
Thickness : 0.8mm
Ø6.35
Sectional shape
of heat insulator
OUTDOOR UNIT
TC
Allowable pipe length
Allowable height difference
Connecting pipe
Thickness : 0.8mm
Ø12.7
INDOOR UNIT
Evaporator
TA
•
Multi-blade fan
Connecting pipe
Thickness : 0.8mm
Ø6.35
Sectional shape
of heat insulator
OUTDOOR UNIT
TC
Allowable pipe length
Allowable height difference
NOTE : Gas leak check position
Refrigerant flow (Cooling)
Refrigerant flow (Heating
1 : Heat pump model only
*
1)
*
• The allowable pipe length, charge amount of refrigerant, and allow a b le height difference differ according to the
outdoor unit to be combined.
For details, refer to the service manual of the outdoor unit to be combined.
– 10 –
7-1. Indoor Unit
Heat Exchanger Sensor
7. CONTROL BLOCK DIAGRAM
Indoor Unit P.C. Board (MMC-875)
M.C.U
Functions
Operation Display
Temperature Sensor
Infrared Rays Signal Receiver
Infrared
Initializing Circuit
Rays
Clock Frequency
Oscillator Circuit
Remote
Power Supply
Controller
Noise Filter
From Outdoor Unit
Circuit
• Drain Pump Control
• 3-minutes Delay at Restart for Compressor
• Motor Revolution Control
• Processing
(Temperature Processing)
• Timer
• Serial Signal Communication
Drain Pump ON/OFF Signal
Drain Pump Relay
Serial Signal Transmitter/Receiver
Serial Signal Communication
Timer Display
Check Display
Indoor Fan Motor
Voltage setup &
TEMPORARY Switch
Float Switch
Drain Pump
Option
Remote controller
RAS-M10YDV-E, M13YDV-E, M16YDV-E
(Heat Pump Model)
Wireless Remote Controller
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, HEAT
Thermo. Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
ECO (SLEEP)
Infrared
Rays
RAS-M10YDCV-E, M13YDCV-E, M16YDCV-E
(Cooling Only Mpdel)
Infrared
Rays
Wireless Remote Controller
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, FAM ONLY
Thermo. Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
ECO (SLEEP)
Hi-POWER
Hi-POWER
– 11 –
8. OPERATION DESCRIPTION
8-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air
conditioner, which uses AC motors for the indoor fan
motors and the outdoor fan motor. And the capacityproportional control compressor which can change
the motor speed in the range around from 20 to 100
rps is mounted. The AC motor drive circuit is
mounted to the indoor unit. The compressor and the
inverter to control outdoor fan motor are mounted to
the outdoor unit. The entire air conditioner is mainly
controlled by the indoor unit controller.
The indoor unit controller drives the indoor fan motor
based upon command sent from the remote controller, and transfers the operation command to the
outdoor unit controller.
The outdoor unit controller receives operation
command from the indoor unit side, and controls the
outdoor fan and the pulse modulating valve. (PMV)
Besides, detecting revolution position of the compressor motor, the outdoor unit controller controls
speed of the compressor motor by controlling output
voltage of the inverter and switching timing of the
supply power (current transf er timing) so that motors
drive according to the operation command.
And then, the outdoor unit controller transfers
reversely the operating status information of the
outdoor unit to control the indoor unit controller.
(2) Role of outdoor unit controller
Receiving the operation command signal (Serial
signal) from the indoor controller, the outdoor unit
performs its role.
• Compressor operation
control
• Operation control of
outdoor fan motor
• PMV control
• Detection of inverter input current and current
release operation
• Over-current detection and pre vention operation to transistor module (Compressor stop
function)
• Compressor and outdoor fan stop function
when serial signal is off (when the serial signal
does not reach the board assembly of outdoor
control by trouble of the signal system)
• Transferring of operation information (Serial
signal) from outdoor unit to indoor unit
• Detection of outdoor temperature and operation revolution control
• Defrost control in heating operation ((Heat
pump model only) Temp. measurement by
outdoor heat exchanger and control for 4-way
valve and outdoor fan)
Operations fol-
lowed to judgment
of serial signal
from indoor side.
As the compressor adopts four-pole
brushless DC motor, the frequency of the
supply power from inverter to compressor
is two-times cycles of the actual number of
revolution.
(1) Role of indoor unit controller
The indoor unit controller judges the operation
commands from the remote controller and
assumes the following functions .
• Judgment of suction air temperature of the
indoor heat exchanger by using the indoor
temp. sensor.
• Temperature setting of the indoor heat exchanger by using heat e xchanger sensor
(Prevent-freezing control)
• Indoor fan motor operation control
• LED display control
• Transferring of operation command signal
(Serial signal) to the outdoor unit
• Reception of information of operation status
(Serial signal including outside temp. data) from
the outdoor unit and judgment/display of fail.
(3) Contents of operation command signal (Serial
signal) from indoor unit controller to outdoor unit
controller
The following three types of signals are sent from
the indoor unit controller.
• Operation mode set on the remote controller
• Compressor revolution command signal
defined by indoor temperature and set temperature
(Correction along with variation of room temperature and correction of indoor heat exchanger temperature are added.)
• For these two types of signals ( [Operation
mode] and [Compressor rev olution] ), the
outdoor unit controller monitors the input
current to the inverter, and performs the followed operation within the range that current
does not exceed the allowa ble value.
• Temperature of indoor heat exchanger b y
indoor heat exchanger sensor
(Minimum revolution control)
– 12 –
(4) Contents of operation command signal (Serial
signal) from outdoor unit controller to indoor unit
controller
The following signals are sent from the outdoor
unit controller.
• The current operation mode
• The current compressor revolution
• Outdoor temperature
• Existence of protective circuit operation
For transf erring of these signals , the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.
Contents of judgment are described below.
• Whether distinction of the current operation
status coincide with the operation command
signal
• Whether protective circuit operates
When no signal is received from the outdoor
unit controller, it is assumed as a troub le .
8-1-1. Capacity Control
The cooling capacity is varied by changing compressor motor speed. The inverter changes compressor
motor speed by changing AC 220 – 240V power to
DC once, and controls capacity by changing supply
power status to the compressor with transistor
module (includes 6 transistors). The outline of the
control is as follo ws : The revolution position and
revolution speed of the motor are detected by detecting winding electromotive force of the compressor
motor under operation, and the revolution speed is
changed so that the motor drives based upon revolution speed of the operation command by changing
timing (current transfer timing) to exchange inverter
output voltage and supply power winding.
Detection of the revolution position for controlling is
performed 12 times per 1 rev olution of compressor.
The range of supply power frequency to the compressor differs according to the operation status.
8-1-2. Current Release Control
The outdoor main circuit control section (Inverter
assembly) detects the input current to the outdoor
unit. If the current value with compressor motor
speed instructed from indoor side exceeds the
specified value, the outdoor main circuit control
section controls compressor motor speed by reducing motor speed so that value becomes closest to
the command within the limited value.
8-1-3. Indoor Fan Control (AC Fan Motor)
The indoor fan is operated by motor speed non-step
variable A C phase control driv e system. For airflow
rate, motor speed is controlled manually in five steps
(LOW, LOW+, MED, MED+, HIGH), or automatically in
AUTO mode adjusted according to the room temperature. It is not selected by relay, so selecting
sound does not generate.
Table 8-1-1 shows the motor speed.
This function performs the phase output constant
control of the fan motor.
(Does not control the revolution speed.)
Since the motor speed varies according to the
external static pressure, the values described in the
table are criteria to confirm the motors, etc. However,
the maximum rev olution speed is limited to 1300rpm
for protection of the terminal voltage of the running
capacitor.
Operation mode
COOL
HEAT
Fan mode
H
L
H
L
Table 8-1-1 Reference fan speed
Motor speed (rpm)
M10 M13 M16
900 to 1150 950 to 1200 1000 to 1250
600 to 800 650 to 850 700 to 900
900 to 1150 950 to 1200 1000 to 1250
650 to 850 700 to 900 750 to 950
– 13 –
Set
temp.
+3
M+
*1
*1
*1
L–
+2.5
+2
+1.5
+1
+0.5
0
–0,5
˚C
(Room temp.) – (Set temp.)
In normal
operation
8-2. Description of Operation Circuit
• Turning [ON] the breaker flashes the operation
lamp.
This is the display of pow er-ON (or notification of
power f ailure).
• When pushing [START/STOP] button of the remote
controller, receive sound is issued from the main
unit.
8-2-1. Fan Only Operation
(The Remote controller MODE Button
is Set to the FAN ONLY Operation)
• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply b y
pushing [START/STOP] button.
• When the FAN button is set to the AUTO position,
the indoor fan motor operates as shown in Fig.
8-2-1. When the FAN SPEED button is set
manually, the motor operates with a constant air
flow.
• ECO mode cannot be set.
8-2-2. Cooling Operation
(The Remote controller MODE Button
is Set to the COOL Position)
• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply b y
pushing [START/ST OP] b utton.
• A cooling operation signal is transmitted to outdoor
unit.
• The indoor fan motor operates as shown in Fig.8-22 when FAN button is set to AUTO.
• The motor operates with a constant air flow when
the FAN button is set manually.
• The outdoor unit controls the outdoor fan and the
compressor motor speed according to the operation command signal sent from the indoor unit.
˚C
+3
+2.5
+2
+1.5
+1
+0.5
(Room temp.) – (Set temp.)
Set
temp.
0
(Set temp.) 25˚C
NOTE :
1: Calculated from difference in motor speed of M+
*
and L–, and controlled.
Fig. 8-2-1 Auto setting of air flow
M+
*1
*1
*1
L–
NOTE :
1: Calculated from difference in motor speed of M+
*
and L–, and controlled.
Fig. 8-2-2 Setting of air flow [Air Flow AUTO]
(1) Cooling capacity control
• The cooling capacity and room temperature
are controlled by changing the compressor
motor speed according to both the difference
between the temperature detected by the room
temperature sensor and the temperature set by
TEMP button and also any change in room
temperature.
• When compressor has been activated or
reactivated, compressor motor speed goes up
with restricting the maximum speed gradually
from operation start.
• When room temperature is lower than set
temperature, indoor fan motor is operated at
fan speed L– as shown in Fig. 8-2-2 while the
outdoor unit stops.
– 14 –
(2) Prevent-freezing contr ol
If temperature of indoor heat exchanger detected
by the indoor heat e xchanger sensor is 4°C or
lower, compressor motor speed is gradually
lowered to pre vent freezing of the indoor heat
exchanger. If temperature is 6°C or higher, return
the operation to the above item (1).
(3) Limit for maximum compressor motor speed
by indoor fan speed
When outdoor temperature sensor detected 32°C
or lower, and indoor heat exchanger sensor
detected 15°C or lower, the maximum compressor motor speed is limited by the indoor f an
speed.
8-2-3. DRY Operation
(The Remote controller MODE Button
is Set to the DRY Position)
• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply b y
pushing [START/STOP] button.
• Dry operation signal is transmitted to outdoor unit.
• The Cooling operation giving priority to dehumidify-
ing, which restrains the indoor fan speed and
compressor motor speed, is performed.
• The indoor fan motor operates as sho wn in Fig. 82-3. (Fan speed is AUT O only.)
• The outdoor unit controls the outdoor fan rela y and
the compressor motor speed according to the
operation command signal sent from the indoor
unit.
(1) Dehumidifying-preferential Cooling capacity
control
• The cooling capacity and room temperature are
controlled by changing the compressor motor
speed according to both the difference between the
temperature detected by the room temperature
sensor and the temperature set by TEMP button
and also any change in room temperature.
• When the air conditioner operates in Dry mode, the
maximum compressor motor speed is restricted.
While multiple indoor units operate, compressor
motor speed is calculated in the outdoor unit to
operate.
• When room temperature is lower than set temperature, indoor fan motor is operated at fan speed UL
as shown in Fig. 8-2-3 while the outdoor unit stops.
• Other controls than the above-mentioned controls
are common to those of Cooling operation.
8-2-4. Heating Operation
(Heat pump model only)
Transferring of heating operation signal from indoor
unit to outdoor unit starts.
The indoor fan motor operates by the room temperature when selecting “AUTO” of “FAN” as shown in Fig.
8-2-4, and operates with a set air flow when selecting
“Low” to “High”.
However, to prev ent cold draft, revolution speed of
the fan is restricted by indoor heat exchanger temperature when air flow is AUTO (Fig. 8-2-5) and
starting of FAN Manual.
[Basic control]
+2.5
+2.0
+1.5
+1.0
+0.5
(Room temp.) – (Set temp.)
Set
temp.
0
–0.5
NOTE :
1 : Middle motor speed between L– and UL
*
Fig. 8-2-3 Setting of air flow
L–
*1
UL
– 15 –
Set
temp.
(Room temp.) –
–0.5
–1
–1.5
–2
(Set temp.)
–5.0
–5.5
[FAN AUTO]
0
LOW
1
*
2
*
M+
HIGH
NOTE :
1, *2 : Approximate revolution speed of M+ and L to
*
linear according to temperature.
Fig. 8-2-4 Setting of air flo w
[Cold draft preventing control]
The upper limit of fan revolution speed is shown
below.
TC
(˚C)
44
43
31
30
A + 4
A – 8
FAN
AUTO
33
32
20
19
*
A
A – 8
Starting
of FAN
Manual
2
HIGH
Approximate
revolution speed
of HIGH and SUL
linear by Tc.
3
*
SUL
( NOTE : *1)
SUL
Stop
NOTES :
1 Stops for 2 minutes after thermostat-OFF.
*
224°C when the set temp. is 24°C or more
*
Set temp. when the set temp. is below 24°C
3 SUL : Super ultra low
*
Fig. 8-2-5 Cold draft pre venting control
The outdoor unit controls the outdoor fan based upon
the operation signal sent from the indoor unit, and
also controls revolution speed of the compressor
motor.
The power coupler f or 4-w ay valve is turned on, and
turned off in defrost operation.
(1) Heating capacity control
Calculate the difference between temperature
detected by room temp . sensor every minute and
the set temp. set on “Temp. indicator” and varia-
tion amount of room temp.
Then, obtain the correction amount of the command signal, and correct the current frequency
command signal.
(2) High-temp. release control
If temperature of the indoor heat exchanger
detected by the indoor heat e xchanger sensor is
58°C or higher , compressor motor speed is
gradually lowered to prevent over-temp . rising of
compressed pressure.
If temperature becomes below 51°C, return to
above item (1).
(3) Defrost control
1) Detection of frost
In heating operation, time duration while the
compressor operates is counted, and defrost
operation starts by any condition described
below.
a. The counted time is 28 min utes or more ,
and status that temperature of the outdoor
heat exchanger detected b y the outdoor
heat exchanger is –20°C or low er continued for 3 min utes or more .
b. The counted time is 28 min utes or more ,
and status that temperature of the outdoor
heat exchanger detected b y the outdoor
heat exchanger is –8°C or low er and
temperature lowered by 2.5 °C than the
minimum value of the outdoor heat e x changer during 10 to 15 minutes count
time continued for 3 minutes or more.
c. The counted time is 34 minutes or more,
and status that temperature of the outdoor
heat exchanger detected b y the outdoor
heat exchanger is –5°C or low er and
temperature lowered by 3.0 °C than the
minimum value of the outdoor heat e x changer during 10 to 15 minutes count
time continued for 3 minutes or more.
d. The counted time is 4 hours or more , and
status that temperature of the outdoor heat
exchanger detected b y the outdoor heat
exchanger is 0°C or lower and temper ature
lowered b y 1.0 °C than the minimum value
of the outdoor heat exchanger during 10 to
15 minutes count time continued for 3
minutes or more.
e. If the following three conditions are satis-
fied, defrost operation (Timer defrost)
starts after heating operation for 48 minutes.
Setting on remote controller, HEAT
(mode), HIGH (Fan), 30°C (temp.).
Room temp. is 19°C to 24°C, and
outside air temp. is 5°C or lower.
Defrost operation has been already
performed once.
2) Defrost operation
Operation of the compressor is stopped once,
turn off power coupler for 4-way valve after 10
seconds, and then exchange the
4-way valv e .
After 20 seconds, restart operation of the
compressor. Turn off the outdoor fan just when
the compressor stopped.
If temperature of the indoor heat exchanger is
lower than settimg temperature, stop the
indoor fan.
– 16 –
3) Defrost reset
Resetting operation from defrost to heating is
performed when any one of the following
conditions is satisfied.
a. Temperature of the outdoor heat ex-
changer rose to +8°C or higher.
b. A status that temper ature of the outdoor
heat exchanger is +5°C or higher contin-
ued for 80 seconds.
c. Defrost operation continued for 10 min utes .
In resetting defrost operation, the compressor
stops for 50 seconds if defrost has started
under condition a. to d. in item 1, but the
compressor is reset to heating operation
keeping operated if defrost has started under
condition e. in item 1.
8-2-6. ECO Timer Operation
When you push the ECO button during cooling, Dry,
heating, or A operation, the air conditioner will start
the following operation.
The fan speed will be automatically controlled.
• Cooling operation / Dry operation
In the operation suppression zone, where capacity
is kept to the minimum, overcooling is prevented by
raising the temperature setting by 1°C after 1 hour
and by 2°C after 2 hours of operation.
The room temperature is thus regulated between
the operation suppression zone and the set temperature.
Operation suppression zone
1˚C
2˚C
8-2-5. Auto Operation
(1) As shown in Fig. 8-2-6, the operation mode
(COOL, FAN ONLY, HEAT) is selected according
to the outside temperature when the operation
has started.
The operation in F an mode contin ues until an
operation mode is selected.
If the room temperature is 20°C or higher when
“AUTO” operation started within 2 hours after
“HEAT” operation had stopped, select an opera-
tion mode after F an operation of ultra low fan.
In A U TO operation, the set temperature of each
operation can be corrected by the remote controller in the range of 17 to 30°C.
Outdoor temp.
(˚C)
Cool mode
22
Fan only mode
20
Fan only mode (Cooling only model)
Heat mode (Heat pump model)
Operation start
1 hour
2 hours
Set
temperature
Fig. 8-2-7
• Heating operation
(Heat pump model only)
In the operation suppression zone, where capacity
is kept to the minimum, ov erheating is prevented by
lowering the temperature setting by 1°C after 1
hour and by 2°C after 2 hours of operation.
The room temperature is thus regulated between
the set temperature and the operation suppression
zone.
Set temperature
2˚C
Operation
suppression zone
Operation start
1˚C
1 hour
2 hours
Fig. 8-2-8
8-2-7. High POWER Operation
When you push the Hi-POWER b utton during cooling, heating, or A operation, the air conditioner will
start the following operation. (A operation : Auto
change over)
Fig. 8-2-6
(2) After selecting the operation mode (COOL, FAN
ONLY, HEAT), select an operation mode again
when a status that the compressor was turned
off by the room temperature or outside air temperature continues for 15 minutes.
• Cooling operation
Performs the cooling operation lower than the
setting temperature.
When the room temperature is above the setting
temperature. In addition, fan speed is high*.
Once room temperature is within 1°C of the setting
temperature.
* Noise level raises in accordance with fan speed.
• Heating operation (Heat pump model only)
Performs the heating operation at 2°C higher than
the setting temperature.
– 17 –
8-3. TEMPORARY Operation
• Setting the TEMPORARY switch to “AUTO” starts
the automatic operation, to “COOL” starts the
cooling operation (LOW), respectiv ely.
• Setting the TEMPORARY switch to “AUTO” or
“COOL”, the operation can’t be performed from the
remote controller. (without “STOP”)
• Temporary Auto Operation is operated with the set
temperature fixed at 24°C.
• Temporary Cooling Operation is operated with
Indoor fan speed fixed to Low and with compressor
motor speed fixed to 28.0Hz.
To stop the temporary operation,
set the switch to “AUTO RESTART OFF”.
TEMPORARY
COOL AUT O
VOL TAGE1
220V/230V 240V
VOL TAGE2 REMOCON
220V 230V
AUT O REST AR T
OFF ON
Fig. 8-3-1
AB
8-4. Control of Drain-up Kit (Option)
Drain pump
ON
ON
Thermo OFF Thermo ON
8-4-1. Dain Control
• In cooling, and dry operation, drain pump is
actuated to drain up.
Float switch
CLOSE
[OPERATION CONTROL]
During cooling, and drying operation :
Drain pump ON.
Compressor
Indoor fan
ON OFF ON
ON
Fig. 8-4-1
8-4-2. Over Flow Check Control
• Drain level is checked by float switch. If the float switch is actuated (OPEN), micro-computer cut the signal to
the outdoor unit and power supply to stop the outdoor unit, operate the drain pump exert to drain out.
• In fan only, heating operation (Heat pump model only), and even in stoppage but while float s witch is actuated,
drain pump is ON (Operation).
[OVERFLOW CHECK AND CONTROL]
Operation starts at overflowing Overflow detection durling operation
Operation starts
Overflow detection
Overflow stops
Drain pump
Float switch
Compressor
Indoor fan
1 If the float switch is not reset (closed) within 2 min utes 30 seconds , the operation lamp flashes. (5Hz)
*
2 When the float switch has been reset, the system recognizes the flashing operation lamp and the operation of
*
ON
OPEN
OFF
ON
Compressor stops.
Drain pump continues operation.
CLOSE OPEN CLOSE
ON ON
1 2'30"
*
ON ONOFF
ON
2 2'30"
*
the outdoor unit resumes after 2 minutes 30 seconds.
Fig. 8-4-2
– 18 –
8-5. Auto Restart Function
This unit is equipped with an Automatic restarting function which allows the unit to restart and resume the set
operating conditions in the ev ent of a supply power shutdown without the use of the remote controller.
The operation will resume without warning three minutes after the power is restored.
INFORMATION
The AUTO RESTART FUNCTION is not set to work on shipment from the factory, and so it is necessary to
set it to function as required.
CAUTION
When wired remote controller is connected and in case of its
batteries are exhausted or not used, the unit restart FAN ONLY
operation.
HOW T O SET THE AUTO REST ART
To set the auto restart function, proceed as follows:
OPERATION
Slide the slide switch to AUTO RESTART ON side.
TEMPORARY
COOL AUT O
AUT O RESTART
OFF ON
When you set to “ON” position of Auto restart, Pi Pi Pi
sound (3 times) are appear.
(During power supply to the unit)
When power supplying return, system will be restart
automatically.
TEMPORARY
COOL AUT O
AUT O RESTART
OFF ON
VOLTA GE1
220V/230V 240V
VOLTA GE2 REMOCON
220V 230V
MOTION
AB
• The Auto Restart function will not accept an instruction if timer operation with the remote controller is selected.
(Please refer to the section of setting the timer operation.)
HOW T O CANCEL THE AUTO REST ART
To cancel the AU TO RESTART function, proceed as follo ws:
The system will now be required to manually restart with the remote controller after the main supply is returned.
OPERATION
Slide the slide switch to AUTO RESTART OFF side.
TEMPORARY
COOL AUT O
AUT O RESTART
OFF ON
When you set to “OFF” position of Auto restart, Pi Pi Pi
sound (3 times) are appear.
(During power supply to the unit)
When power supplying return, system will not be
restart automatically.
MOTION
– 19 –
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