Toshiba RAV Heat User manual

FILE NO. A90-9714
AIR-CONDITIONER
RAV HEAT PUMP RANGE
Printed in UK Aug 1997 s
SERVICE MANUAL
INFRARED REMOTE CONTROL

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SUMMARY
• The infrared remote controller within this manual conforms with the protection requirements of European
Directives 89/336/EEC Electromagnetic Compatibility and 73/23/EEC Low Voltage.
CONTENTS
1. OPERATION DESCRIPTION...................................................................................................................................3
2. TROUBLESHOOTING...........................................................................................................................................12
3. CONSTRUCTION VIEWS AND PARTS LIST..........................................................................................................17
4. SPECIFICATIONS OF ELECTRICAL PARTS..........................................................................................................17

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ON/OFF Button
• Push this button to start operation.
(A receiving beep is heard)
• Push the button to stop operation.
(A receiving beep is heard)
Temperature button (TEMP)
The set temperature is
increased to a max 30ºC.
The set temperature is
decreased to a min of 17ºC.
Mode select button (MODE)
Push this button to select modes. Each
time you push the button, a mode is
selected in a sequence that goes from
AUTO, COOL, DRY,HEAT, FAN ONLY,
and back to AUTO. (A receiving beep is
heard).
Economy button (ECONO)
• Push this button to set the
economical operation mode of the
air conditioner.
(A receiving beep is heard)
1. OPERATION DESCRIPTION
1-1. REMOTE CONTROLLER
1-1-1. Remote Functions (Cover closed)

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Temperature button (TEMP)
The set temperature is
increased to a max 30ºC.
The set temperature is
decreased to a min of 17ºC.
Cover closed functions
• Push this button to show functions
as with the cover closed.
Function lock button (LOCK)
• Push this button to lock settings.
• Push this button again to cancel
lock function.
Infrared signal transmitter
Transmits the signal to the indoor unit
ON/OFF Button
• Push this button to start operation.
(A receiving beep is heard)
• Push the button to stop operation.
(A receiving beep is heard)
Fan speed button (FAN)
• Push this button to select fan speed.
• When you select AUTO, the fan
speed is automatically adjusted
according to the room temperature.
You can also manually select the
desired fan speed from the three
settings. Low, Med, High. (A receiving
beep is heard).
Auto louver button (AUTO)
• Push this button to operate the
louver.
(A receiving beep is heard).
• Push this button again to stop louver
operation.
(A receiving beep is heard).
Set louver button (SET)
• This button has no function on RAV
units.
Off timer button (OFF)
• Push this button to set the OFF
timer.
On timer button (ON)
• Push this button to set the ON timer.
Time adjust button
• Rotate this to increase/decrease
time settings.
Cancel button (CNL)
• Push this button to cancel timer
operation.
(A receiving beep is heard).
Reserve button (RSV)
• Push this button to set timer .
(A receiving beep is heard).
Mode select button (MODE)
Push button to select modes. Each time
you push the button, a mode is selected
in a sequence that goes from AUTO,
COOL, DRY, HEAT, FAN ONLY, and
back to AUTO. (A receiving beep is
heard).
1-1-2. Remote Functions (Cover Open)

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1-1-3. Names and Functions of Indicators on Remote Controller
TRANSMITTER display
Shows when the signal is being
transmitted to the undoor unit. ON/OFF display
Shows if unit is enabled.
LOCK display
Shows if the Lock function is enabled.
MODE display
Shows the current mode of the unit,
AUTO, COOL, DRY, HEAT or FAN ONLY.
TEMP display
Shows the temperature setting of the
unit.
ECONOMY display
Shows if the economy mode is in
operation.
FAN display
Shows the units current fan speed
setting. AUTO, LOW, MED or HIGH.
CLOCK display
Shows the current time.
TIMER display
Shows the current timer ON and OFF
settings.

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1-2-2. Remote Receiver Switch
Remote control The unit will be controlled by the Infrared Remote Control.
Auto The unit will operate in temporary Auto mode with the set temperature at 24°c
Cool The unit will operate in temporary Cooling mode with the set temperature at 17°c
The air conditioner can be controlled using this method in the event of misplacing the Infrared remote
controller or its malfunction.
1-2-3. Audible acknowledgement
The remote receiver acknowledges each transmission from the Infrared remote controller, with an audible
beep.
1-2. REMOTE RECEIVER FUNCTIONS (FITTED TO INDOOR UNIT)
1.2.1. Remote Receiver Features
Audible acknowledgement.
Remote Receiver Switch
Infrared Receiver
Yellow LED lights when the
timer is in operation. Green LED lights when unit is in
defrost mode.
Red LED lights when unit is
operational.

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1-3. HANDLING THE REMOTE CONTROLLER
1-3-1. Location of the Remote Controller
Operate the remote controller where its signals can reach the receiver on the air conditioner (within 7m)
1-3-2. Remote Controller Mounting bracket
A mounting bracket is supplied with the remote controller.
(1) Installing the mounting bracket
Install the bracket for the remote controller where the unit can be operated, with the remote in the bracket.
(2) Fitting and removing the remote controller
To mount, hold the remote controller parallel to the mounting bracket and push it in fully. To remove, slide the
remote controller upwards and out from the mounting bracket.

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1-3-4. Cautions
• The air conditioner will not operate if curtains, doors or other materials block the signal from the remote controller
to the indoor unit.
• Protect the remote controller from moisture.
• Do not expose the remote controller to direct sunlight or heat.
• If the infrared signal receiver on the indoor unit is exposed to direct sunlight, the air conditioner may not function
properly.
• If the room using the air conditioner has fluorescent lighting with electronic starters, signals may not be properly
received. If you are planning to use such fluorescent lamps, consult your local dealer.
• If other electrical appliances react to the remote control, either move these appliances or consult your local dealer.
1-3-3. Replacing Batteries
The remote controller uses two alkaline dry batteries (LR03 AAA size).
(1) Remove the cover of the battery compartment at the back of the remote controller by sliding it out in the direction of
the arrow.
Remove used batteries and dispose of responsibly, then insert new batteries.
(2) Reset the remote controller by pressing the ACL button in the battery compartment, with a pointed object
(3) Replace the cover of the battery compartment.
(4) If remote controller fails to operate properly, repeat reseting by pressing ACC button.
Notes:
• When replacing batteries, use correct type. Incorrect batteries may cause the remote controller to malfunction.
• If you do not use the remote controller over a long period, remove the batteries. Otherwise, battery leakage may
damage the remote controller.
• The average battery life during normal use is approximately one year.
• Replace the batteries when there is no receiving beep from the indoor unit or if the transmission indicator on the
remote control unit fails to show.
Ensure the correct
polarity of
batteries
ACL Button

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1-4-1. AUTO Operation
When you set the air conditioner in AUTO mode, it initially selects cooling mode. Then depending on the room tempera-
ture the mode of operation may change.
Operation Steps
Supply Power On
The OPERATION LED on the remote receiver starts flashing.
(1) MODE button
• Select AUTO.
(2) TEMP. button
• Push the TEMP. button.
• Select the required temperature between 17°C to 30°C.
(3) ON/OFF button
• Push this button to start the air conditioner.
• The OPERATION LED on the remote receiver lights. The operating mode is selected in accordance with the
room temperature and operation starts after approximately 3 minutes.
Stop: ON/OFF button
• Push this button again to stop the air conditioner.
Note:
• If the AUTO mode is uncomfortable, you can select the desired conditions manually.
• When you select the AUTO mode, you do not have to set the fan speed. The FAN speed display will show
AUTO and the fan speed will be automatically controlled.
3
2
1
1-4 OPERATING MODES
Once selected the operating mode is stored in the unit's microcomputer memory. Thereafter, the air conditioner will
operate under the same conditions when you operate the ON/OFF button of the remote controller.

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1-4-2. HEAT Operation
Operation Steps
Supply Power On
The OPERATION LED on the display panel of the indoor unit starts flashing.
(1) MODE button
• Select HEAT mode.
(2) TEMP button
• Set the required temperature.
(3) FAN button
• Select any of the “AUTO”, “LOW”, “MED” and “HIGH”.
(4) ON/OFF button
• Push this button again to start the air conditioner.
• The OPERATION and DEFROST LEDs light on the remote receiver. After a period of preheating the
DEFROST LED extinguishes and heating operation starts.
Stop: ON/OFF button
• Push this button again to stop the air conditioner.
(B) 1-4-4. FAN ONLY Operation
• The FAN ONLY mode does not control temperature. Therefore, perform only steps (1), (3) and (4) to
select this mode.
3
2
1
4
(A) 1-4-3. COOL Operation
Operation Steps
Supply Power On
The OPERATION LED on the remote receiver starts flashing.
(1) MODE button
• Select COOL mode.
(2) TEMP button
• Push the TEMP. button.
• Cooling 17°C or higher
(3) FAN button
• Select any of the “AUTO”, “LOW”, “MED” and “HIGH”.
(4) ON/OFF button
• Push this button again to start the air conditioner.
• The OPERATION LED on the display panel of the lndoor unit lights. Operation starts after approximately 3
minutes.
Stop: ON/OFF button
• Push this button again to stop the air conditioner.

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1-4-5. DRY Operation
Operation Steps
Supply Power On
The OPERATION LED on the display panel of the indoor unit starts flashing.
(1) MODE button
• Select DRY.
(2) TEMP button
• Push the TEMP. button.
• Select the required temperature between 17°c to 30°c.
• The fan speed indicator displays AUTO.
• Low indoor fan speed will be selected automatically.
(3) ON/OFF button
• Push this button again to start the air conditioner.
• The OPERATION LED on the remote receiver unit lights. Operation starts after approximately 3 minutes.
(If you select FAN ONLY mode, the unit will start immediately.)
Stop: ON/OFF button
• Push this button again to stop the air conditioner.
2
1
3
1-4-6. ECONO. Operation
Econo can be selected in the AUTO, COOL and HEAT modes of operation. The fan speed selector
changes to AUTO. The air conditioner now operates in the economy mode.
1-4-7. Louver Operation
(4) AUTO Button
• When this button is first pressed the louver will oscilate, its position can be fixed in a desired direction by
pressing the button again.
4

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1-5. TIMER OPERATION
1-5-1. Setting the Clock
• (1) Push the clock set button in the battery compartment. The clock " : " starts flashing.
• (2) Rotate the TIME ADJUST dial to set the time
• (3) Press the RSV button when complete. The clock " : " remains constant.
1-5-2. Setting the On time
• (4) Press the on button. The ON TIME " : " starts flashing.
• (2) Rotate the TIME ADJUST dial to set the time.
• (3) Press the RSV button when complete. The ON TIME " : " remains constant.
• The yellow timer LED will Iluminate on the remote receiver and the air conditioner will begin to operate in
the previous set mode at the set on time.
1-5-3 Setting the Off time
• (5) Press the off Button. The OFF TIME " : " starts flashing.
• (2) Rotate the TIME ADJUST dial to set the time.
• (3) Press the RSV button when complete. The OFF TIME " : " remains constant.
• The yellow timer LED will Iluminate on remote receiver and the Air conditioner will turn off at the set time.
1.5.4 Cancel Button
• Push the CNL button to cancel the timer setting.
The yellow LED will extinguish.
1
4
5
2
6
3

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Primary judgement
The indoor part (including the
remote control) is defective.
(Check batteries.)
O.K.
Remote control is not
possible.
Remote control is
possible.
2-1-2. Remote Receiver Fault Functions
RED YELLOW GREEN RED
2. TROUBLESHOOTING
2-1-1. Role of Indoor Unit.
The indoor unit receives operation commands from the remote and monitors or controls the following factors.
• Measurement of the return air temperature using the sensor (TA)
• Louver motor control
• Control of the indoor fan motor operation
• Control of the LED display
• Control of the outdoor unit compressor and the outdoor fan motor.
2-1. FAULT FINDING
The L.E.D's on the receiver can display check code information.
Power Failure (When power on)
Service Mode (Selected)
Service Mode (Check code)
High pressure Switch Fault
Operation LED
Flash (1Hz) Timer LED Flash (5Hz) Defrost LED Flash (5Hz) Operation LED Flash (5Hz)
2-1-3 Possible Causes of abnormal operation.
Check
Isolate power supply
and then reconnect
before attempting to
operate the remote
control.
Indoor unit will not operate from
infrared Remote Controller.
System

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ACL
ACL CLOCK
(Rear bottom of remote controller)
Rear bottom cover
All clear button
Switch for selecting
service mode
CLOCK
Switch for selecting
service mode
2-2-2. Reverting to Normal Mode
Push the all clear button (ACL) on the rear bottom of the wireless remote control with a tip of pencil for
more than 3 seconds. Make sure the operation mode display, fan speed display, clock display and setting
temperature display are turned on and “
: ” of the clock display is flashing.
2-2-3. Cautions when carrying out servicing
1) After completion of servicing, always push the all clear (ACL) button to return the operation mode to the
normal mode.
2) After completion of servicing by the check code, isolate the power supply and then reconnect to
reset memorized contents of the microcomputer to the initial status.
2-2. CHECK CODES
The fault codes can be checked by putting the remote controller into service mode, and then checking the LED's
on the receiver according to the table in 2-1-2.
2-2-1. Selecting service mode
Push the button provided under the battery cover of the wireless remote control with a tip of pencil for more than
3 seconds. make sure “” is showing on the display.
All clear button
Battery cover

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2-2-4. Check Code Diagnosis
The system can store and recall any of a predetermined selection of codes which can indicate associated electrical
or refrigeration faults.
Diagnosis by the check codes is conducted with procedures shown below.
a) Enter the service mode and make sure the off timer display of the remote control shows
“”.
b) Operate the “ON/OFF” key and make sure the timer lamp on the display section is flashing (5 Hz).
c) Next press the Temp key and the displayed HEX code will increase by one. The receiver will then beep. When
the displayed check code matches the code on the indoor unit. The operation L.E.D will light and the HEX code
shown should be looked up in the following tables.
d) If other buttons on the remote are pressed in the service mode, the display will change as shown in the table below.
This option enables check code numbers to be quickly reached.
e) Fault codes can only be retrieved for the first unit if multiple units are wired in a group, therefore group operation is
not recommended.
Operating key
ON/OFF
TEMP. (Up)
TEMP. (Down)
“AUTO” LOUVER
“SET” LOUVER
,,
,,
,,
,,
,,
,,
,,
,,
,,
,,
,,
,,
2-2-5. List of Check Codes
RETURN SIGNAL
NOT COMING TO
INDOOR
ROOM TEMP.
SENSOR (TA).
INDOOR
HEAT-EXCHANGER
SENSOR (TC).
Out of place, break,
short-circuit.
1) Wrong wiring in connecting
cable (serial signal).
4-WAY VALVE
SYSTEM
1) Indoor heat-exchanger
temperature rises, after
starting cooling operation.
2) Indoor heat-exchanger
temperature drops after
starting heating operation.
SYMPTON
1. Check the indoor temp. sensor.
2. Check the indoor PC board.
1. Check the indoor heat-exchanger sensor.
2. Check the indoor PC board.
1. If outdoor unit does not work at all.
(1) Check the connecting cable correct wrong wiring.
(2) Check the outdoor PC board.
2. If operates normally.Between indoor terminal
plates 2 and 3, return signal is:
Available: Check the indoor PC board.
Not available: Check the outdoor PC board.
Operation
continuing
Operation
continuing
Operation
continuing
Operation
continuing
Out of place, break,
short-circuit.
STATUS OF AIR
CONDITIONER JUDGEMENT AND ACTION
CHECK CODE
DIAGNOSTIC FUNCTIONS
1. Check the 4-way valve.
2. Check the 2-way valve and check valve.
3. Fault with indoor heat exchanger sensor.
4. Check the indoor PC board.
5. Two systems may be cross wired.
The display code is increased by
"1".e.g.
The display code is decreased by
"1".e.g.
The display code is increased by
16 e.g.
The display code is repeated
e.g.
,,
,,
,,
,,
Indication after operation
,,
,,

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DEFROST SENSOR
(TE)
OTHER CYCLE
SYSTEM 1. Compressor case thermostat, IOL, OL operation.
(contactor OFF, compressor stops: AH8 Models)
(contactor ON, compressor stops: AH Models)
2. Indoor heat-exchange sensor out of place.
3. Check the indoor PC board.
4. Check that service valves are OPEN.
5. Two systems may be cross wired.
1. Check the charged amount of refrigerant gas.
(Gas shortage →gas supplement, check for gas leaks)
2. Indoor fan locked.
1. Check the defrosting sensor.
2. Check the outdoor PC board.
Out of place, break, short-
circuit.
1) Indoor heat exchange
temperature does not
change after starting
cooling/heating operation.
2) When transmitting
instruction for stopping
compressor by freeze
preventing control.
1. Check the high pressure switch.
2. Check the outdoor PC board.
1. Check the outdoor heat-exchanger sensor.
2. Check the outdoor PC board.
Full stop
Full stop
High pressure switch does
not reset.
5 sec in cooling
30 sec in heating
WRONG WIRING OF
REMOTE CONTROL
UNIT
Indoor unit does not
operate at all.
Out of place, break,
short-circuit.
OUTDOOR
HEAT-EXCHANGER
SENSOR (TL)
HIGH PRESSURE
SWITCH
Full Stop 1. Check the wiring between remote control unit and
indoor unit.
2. Check the indoor unit PC board.
Full stop
TD SENSOR 1. Check the TD sensor
2. Check the outdoor PCB
3. Possible refrigerant gas leak
4. Refrigerant cycle failure
5. Overload relay
Full stop
Outdoor unit
stops
(indoor fan L)
Operation
continuing

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Location holes
2-(4.5 x 9)
101
72 30
160
100
3. CONSTRUCTION VIEWS AND PARTS LIST
4. SPECIFICATIONS OF ELECTRICAL PARTS
No
1
2
3
TYPE
WH-C2YE
XWS-DS5
2 x LR03 (AAA)
SPECIFICATIONS
Infrared remote control transmitter
Infrared remote control receiver
1.5v
PARTS NAME
Remote Control
Remote Receiver
Battery
Remote Holder
Remote controller
62
Part Number
43069666
43063253
43A69009
Description
Remote controller
Holder, Remote
Remote Receiver
Remote Receiver
30
60

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Location holes
2-(4.5 x 9)
30
3. CONSTRUCTION VIEWS AND PARTS LIST
4. SPECIFICATIONS OF ELECTRICAL PARTS
TYPE
WH-C2YE
XWS-DS5
2 x LR03 (AAA)
SPECIFICATIONS
Infra-red remote control transmitter
Infra-red remote control receiver
PARTS NAME
Remote Control
Remote Receiver
Battery

PORSHAM CLOSE, BELLIVER INDUSTRIAL ESTATE, PLYMOUTH, PL6 7DB, UK