Mitsubishi Electric JT-S2AP-W-NE User manual

Warning:
Repair work must be performed by the manufacturer, its service
agent or a similarly qualified person in order to avoid hazards.
HAND DRYER
HANDBOOK
MODELS
JT-S2AP-W-NE
JT-S2AP-S-NE
JT-S2A-W-NE
Nameplate
July 2019 No. U212-C

Contents
1. Safety precautions .................................................................... 3-4
2. Features ....................................................................................... 4
3. Names and functions of components .......................................... 5
4. Specifications .............................................................................. 6
5. Outside dimensions
.................................................................. 6-7
6. Electrical wiring diagrams ............................................................ 7
7. Circuit board diagram ................................................................... 8
8. Principles of operation ................................................................. 9
9. Troubleshooting..................................................................... 10-13
10. Before receiving repair requests ................................................ 14
11. Service inspection list................................................................. 14
12. Overhauling procedures ........................................................ 15-19
13. Parts catalog ......................................................................... 20-44
JT-S2AP-W-NE ............................................................... 21-28
JT-S2AP-S-NE................................................................ 29-36
JT-S2A-W-NE ................................................................. 37-44

─3 ─
Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a
safe manner.
The types and levels of danger that may arise if the product is handled incorrectly are described with the warning
symbols shown below.
Warning
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result
in electric shock, fire and/or injury.)
Electric shock
If you must inspect the circuitry while the power is
on, do not touch the live parts.
(Failure to heed this warning may result
in electric shock.)
Check insulation
Upon completing repair work, always measure the
insulation resistance. Verify that it is at least 10 MΩ
(with a 500-V DC insulation resistance tester), and
then turn on the power.
(Inadequate insulation may result in
electric shock.)
Incorrect handling of the product may
result in serious injury or death.
Caution Incorrect handling of the product may result in minor injury
or damage to properties including buildings and equipment.
Proper electric work
• Use the electric wires designated for electric work,
and conduct electric work in accordance with the
"Electric Installation Engineering Standard", the
"Indoor Wiring Regulations" and the installation
instructions.
• Make sure that the terminals and fixed wiring are
securely connected.
(Improper connection or wiring installation
may result in electric shock and/or fire.)
Use proper parts and tools
For repair, be sure to use the parts listed in the
service parts catalog of the applicable model and
use the proper tools.
(Failure to heed this warning may result in
electric shock, fire and/or injury.)
Caution against
electric shock
Prohibited
Be sure to follow
this instruction.
Turn off the power
Make sure to turn off the circuit breaker prior to
starting repair work. (The charge voltage in the
circuitry remains for another 15 seconds or so,
even after the power is turned off and the LED is
unlit; therefore, wait for at least 15 seconds before
disassembling the product.)
(Failure to heed this warning may result
in electric shock.) Be sure to follow
this instruction.
Wear gloves
Always wear a pair of gloves during inspection or
repair work.
(Failure to heed this caution may result in
injury.)
1. Safety precautions
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Scratches and deterioration
Make sure to replace scratched and/or deteriorated
wiring and lead wires.
(Failure to heed this warning may result
in electric shock and/or fire.)
Be sure to follow
this instruction.

─4 ─
Make sure that the product operates properly upon completion of repair. Clean the product and the surrounding
area, and then notify the customer of the completion of repair.
Notes for servicing
●Before repairs, take the product off the wall.
●Inspect the earth condition, and repair it if it is incomplete. Make sure that a circuit breaker or an overload pro-
tection device is installed, if it is not installed, recommend the customer to install one.
●Check whether the filter is installed securely in place.
●Do not leave a towel or other objects in the hand-drying area.
●Never place any objects on the main body nor cover it.
●Make sure that the product is not being used in any of the following locations:
• Outdoors
• Locations where the temperature could be lower than 0ºC
• Locations where the temperature could be higher than 40ºC
• Locations where there is a lot of dust
• Locations where there is a lot of condensation
• Locations where salt damage could occur
• In vehicles (including ships and airplanes)
• Locations where corrosive, neutral, or reductive gases are present (This may shorten the working life of the
unit and/or cause malfunctions.)
• Near food or tableware
• Kitchens
(Where there is a risk of water splashing)
• Locations where the product may come into direct contact with water
• Locations where the product is in direct sunlight or strong light (It may cause sensor malfunction)
• Rooms that have a sterilization basin, swimming pools, or bathrooms
2. Features
• High speed drying with low energy use and quiet operation
• Robust, tamper-resistant body (JT-S2AP type equipped with the metal cover)
• Quick 0.1 second response time improves user experience.

─5 ─
3. Names and functions of components
(1) Names of components
AIR SPEED
HEATER
ON OFF
HIGH STD
Air speed switch
Hand drying
area
Air inlet
Base
Front cover
Main unit
Power light
Settings
switches
Heater switch
ŶFront
ŶRear
Power cord hole Main unit
*Shaded areas in the ¿gure indicate antibacterial material (excluding outlet nozzle areas).
Front cover *1
Notes:
*1 The front cover of JT-S2AP type is not antibacterial.
*2 JT-S2A type does not have the heater switch.
Front cover
mounting screw
*2
Nozzle Sensor
(2) How to open the front cover
1Remove the front cover mounting screw (1 pc.) on
the bottom of the main unit.
2Insert a thin stick or the like into near the tab of
the upper part of the front cover and disengage
the tab.
3Remove the earthZLUH¿[LQJVFUew (1 pc.) from
the base and remove the front cover.
(JT-S2AP type only)
ƔAttach the front cover in the reverse order.
Ta b
Front
cover
Base
Front cover
mounting screw
Front cover
Earth wire
Front cover
Earth wire ¿[LQJVFUew
1
2
NOTE
ƔPrevent scratching on the front cover. Rust may form
on the scratched area.
(JT-S2AP type only)

─6 ─
4. Specifications
5. Outside dimensions
JT-S2AP-W-NE, JT-S2AP-S-NE
TERMINAL
BLOCK
HOLE FOR
POWER CORD
(REAR)
69
91
77
260
160 2
21.5
231
149
290
140
100
250
Unit: mm
Model
Rated
voltage
(V)
Rated
frequency
(Hz)
Heater Air speed
Rated
current
(A)
Power con-
sumption
(W)
Air
speed
(m/s)
Noise
(dB)
Weight
(kg)
JT-S2AP-W-NE
JT-S2AP-S-NE 220-240
Single
phase
50-60
ON HIGH 4.1-4.3 880-980 150-158 60-62
4.5
STANDARD 3.5-3.7 660-740 125-132 58-59
OFF HIGH 2.9-3.2 630-730 150-158 60-62
STANDARD 2.6-2.8 410-490 125-132 58-59
JT-S2A-W-NE
- HIGH 2.9-3.2 630-730 150-158 60-62 4
- STANDARD 2.6-2.8 410-490 125-132 58-59
• Air speed is calculated from the static pressure measured by the pitot tube (at the nozzle).
• Noise is the A range value measured in an anechoic room. (Average of the three points: 2 m from the front and
both sides of the unit.)
• The heater is turned off automatically when ambient temperature is 30ºC or more. (Only for JT-S2AP type)
• Compliance: LVD, EMC Directive, Ecodesign and Energy Labelling, RoHS Directive

─7 ─
6. Electrical wiring diagrams
JT-S2AP-W-NE, JT-S2AP-S-NE JT-S2A-W-NE
Current fuse in control circuit
FUSE1: 250 V - 20 A
FUSE2: 250 V - 5 A
FUSE3: 250 V - 6.3 A
Thermal fuse fusion temperature
Thermal fuse in motor: 94°C
Thermal fuse in heater: 94°C
Current fuse in control circuit
FUSE1: 250 V - 20 A
FUSE2: 250 V - 5 A
FUSE3: 250 V - 6.3 A
Thermal fuse fusion temperature
Thermal fuse in motor: 94°C
JT-S2A-W-NE
TERMINAL
BLOCK
HOLE FOR
POWER CORD
(REAR)
71
91
77
262
162 2
23.5
233
151
292
140
100
250
Unit: mm

─8 ─
Circuit thermostat characteristics (JT-37MH/M: IC200 40P and 41P)
Temperature
20°C
40°C
60°C
12 V
(C137)
0 V
(CN201 2P)
Reset input: 5 V
(IC200 18P)
Clock frequency: 12 MHz
(IC200 19P)
Power supply voltage:
220 to 240 V AC
(Between TAB1 and TAB2)
Power circuit board
(JT-S2AP type: JT-37PH
JT-S2A type: JT-37P)
Control circuit board
(JT-S2AP type: JT-37MH
JT-S2A type: JT-37M)
Sensor circuit board (JT-37S)
Resistance
Nȍ
Nȍ
Nȍ
3.44 V
2.38 V
1.47 V
IC200 40P and 41P Voltage
5 V
(CN100 3P)
0 V
(CN100 2P)
7. Circuit board diagram
Circuit board diagrams and check points

─9 ─
8. Principles of operation
Descriptions of circuit operation
(1) Notes for turning the power ON / OFF
1When the power is turned ON, the power light (LED 1) turns on after 1.5 seconds, and the hand dryer be-
comes ready for operation.
•
Before the power light turns on, the hand dryer will not operate even if hands are inserted in the hand drying
area. In the meantime, the microcomputer (IC200) on the control circuit board performs the initial settings.
2When the power is turned OFF, the power light turns off and operation stops.
• The circuitry takes about 15 seconds to discharge the voltage retained in it. Wait until the discharging time
elapses before plugging in or out the connectors, replacing the circuit boards, or doing other maintenance.
• Even when any error is occurred, the error display will go off if the power has been turned off. Only when a
microcomputer error is occurred, the error display persists till the voltage retained in the circuitry has been
discharged (till the microcomputer has been reset).
(2) Hand detection and operation
1A range sensor is used as the hand detection sensor.
2When the sensor detects hands, the blower motor turns on and the hand dryer starts to operate.
3Once operation has started, it continues as long as the sensor detects hands.
4If delay time (*Note 1) elapses without detecting hands by the sensor, the blower motor turns off and opera-
tion stops.
Note 1: The delay time until the blower motor turns off is determined by the following setting.
<Motor delay time setting>
When the power is on, use the switch (SW3-3) on the control circuit board (JT-37MH/M) to set the
delay time to 1 or 2 seconds.
SW3-3 Delay time
OFF 1.0 s
ON 2.0 s
5The hand dryer continuously operates for up to 30 seconds.
• Once 30 seconds have elapsed, the hand dryer stops operating even if hands are detected. (Tamper-
resistant timer)
• Since this is a function to assume the presence of a foreign object, the operation will resume when hands
are pulled out and reinserted.
(3) Control of the blower motor
1The air speed (air volume) is determined by the switch (SW1-1 or SW2-1) setting.
SW1-1 (SW2-1) Air speed
OFF STANDARD
ON HIGH
2The motor does not start in the following occasions:
• When a temperature detected by the thermostat on the control circuit board (JT-37MH/M) is 65°C or high-
er, or lower than -40°C
• When a temperature detected by the thermostat on the power circuit board (JT-37PH/P) is 65°C or higher,
or lower than -40°C
(4) Control of the heater (Applicable models: JT-S2AP type)
1To regulate inrush current at startup, the heater turns on 0.5 seconds later than the blower motor.
2The heater does not turn on in the following occasions:
• When the switch (SW1-2) on the control circuit board (JT-37MH) is in the OFF position
• When a temperature detected by the thermostat on the control circuit board (JT-37MH) is 32°C or higher,
or when a temperature detected by the thermostat on the power circuit board (JT-37PH) is 55°C or higher
JT-S2AP type: SW1-1 (JT-37MH)
JT-S2A type: SW2-1 (JT-37M)

─10 ─
Power light (LED 1)
Description of the error display
9. Troubleshooting
Work precautions
• When servicing, reproduce the malfunction two or three times before starting repairs.
• When servicing, always take care to keep proper footing.
• Before starting the service, always unplug the power cord from the outlet, or turn off the circuit breaker when
no power cord plug is provided. Sufficient care must be taken to avoid electric shock or injury.
• Make sure to connect the power supply wires correctly.
• When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force
to the surface mounted parts.
• When removing the circuit board, be careful of the metal edges on the board.
• When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull
on the lead wires.
• When circuit board failure is considered to be a cause, check closely for any broken section on the copper
foil patterns, burning or discoloration of parts.
• After replacing a circuit board, make sure to restore the same settings as before the replacement.
The part names in the text are standardized with the part names in the parts catalog. (There are some
exceptions.)
Model name of the circuit boards
JT-S2AP-W/S-NE JT-S2A-W-NE
Power circuit board JT-37PH JT-37P
Control circuit board JT-37MH JT-37M
Sensor circuit board JT-37S JT-37S
Ex: “Motor abnormality 1” blinks 3 times
<Blinking cycle>
0.4 sec 2.4 sec
Blinking…(predetermined number of blinks)
Blinks for 0.4 seconds
Light turns off for 0.4 seconds
Light turns off
(Light turns off
for 2.4 seconds)
Malfunction location quick reference chart (The malfunction location is indicated by the LED lighting status.)
: Lit : Unlit : Blinking (ON for 0.4 seconds/ OFF for 0.4 seconds)
Description Power light
(LED1) Main cause of error
Normal
When normal –
Tamper prevention 30-second continuous operation (automatic return)
Abnormal
Ɣ
ż
Power-supply detection abnormality 2 blinks Power-supply noise (automatic return)
Motor abnormality 1 3 blinks Motor: lock/connector detached
Motor abnormality 2 4 blinks Motor: brush life limit/brush abnormality
Power circuit board temperature abnormality 5 blinks Power circuit board: high-temperature/low-temperature
(automatic return)
Control circuit board temperature abnormality 6 blinks Control circuit board: high-temperature/low-temperature
(automatic return)
Microcomputer abnormality 7 blinks Microcomputer abnormality (main board)
Power-supply OFF/fuse melting Power-supply OFF, electric current fuse and temperature fuse melting

─11 ─
Error Display Cause Check Method and Remedy
Power light (LED 1)
(The hand dryer does not
operate, and the light
does not light up.)
Connector discon-
nection
Check if the lead wire connectors between the power circuit board
and the control circuit board are disconnected.
Blowout of the cur-
rent fuse
Measure the resistance across the current fuses (FUSE 1 and 2)
on the power circuit board. If the resistance is not normal, replace
the power circuit board.
Resistance Judgment
0 ΩNormal
Malfunction of the
control circuit board
If the error persists after performing the above, replace the control
circuit board.
Malfunction of the
power circuit board
If the error persists after replacing the control circuit board, re-
place the power circuit board.
Power light (LED 1)
(The hand dryer oper-
ates, but the light does
not light up.)
Malfunction of the
control circuit board
Check if the connector CN201 on the control circuit board or
CN100 on the power circuit board is disconnected.
(If a light-emitting device of the control circuit board is in a state of
short circuit or open fault, the light does not light up.)
Malfunction of the
control circuit board
If the error persists after performing the above, replace the control
circuit board.
Power light (LED 1)
(Tamper-resistant timer)
30 seconds have
elapsed.
If hands are inserted in the hand drying area for 30 seconds, the
error occurs.
It returns to normal if hands are pulled out.
Dirty sensor window Check for dirt sticking to the sensor area.
If the hand dryer operates for 30 seconds because of dirt on the
sensor window, remove the sensor dirt, and then reset the power.
Malfunction of the
control circuit board
If the error persists after performing the above, replace the control
circuit board.
Power light (LED 1)
2 blinks
(Power failure)
Connector discon-
nection
Check if the lead wire connectors between the power circuit board
and the control circuit board are disconnected.
Malfunction of the
control circuit board
Replace the control circuit board.
Malfunction of the
power circuit board
Replace the power circuit board.
Power supply noise If there is power supply noise, use a noise filter for the power line
or take other noise-control measures.
Troubles with error display
Is the connector on the control
circuit board or the one on the
power circuit board securely con-
nected?

─12 ─
Error Display Cause Check Method and Remedy
Power light (LED 1)
3 blinks
(Motor error)
Connector discon-
nection for the
motor
Check if the lead wire connectors between the motor and the
power circuit board are disconnected.
Motor brush at the
end of its life
Replace the blower (assembly).
Motor lock Check if the motor vanes are locked.
Blown current fuse
(FUSE 3) or blown
thermal fuse of the
motor
Measure the resistance between the both ends of the motor lead.
If it is ∞Ω, replace the blower (assembly).
Malfunction of the
control circuit board
If no error is found after checking the above, replace the control
circuit board.
Malfunction of the
power circuit board
If the error persists after replacing the control circuit board, re-
place the power circuit board.
Power light (LED 1)
4 blinks
(Motor brush error)
Unusually worn-out
motor brush
Replace the blower (assembly).
Motor brush at the
end of its life
Replace the blower (assembly).
Malfunction of the
control circuit board
If the error persists after performing the above, replace the control
circuit board.
Malfunction of the
power circuit board
If the error persists after replacing the control circuit board, re-
place the power circuit board.
Power light (LED 1)
5 blinks
(Temperature detec-
tion error (Power circuit
board))
An abnormal tem-
perature has been
detected.
If the temperature on the power circuit board rises because of the
overuse, the hand dryer stops the operation.
Leave it until the temperature falls, and then check if the error oc-
curs again.
Malfunction of the
power circuit board
If the error persists after performing the above, replace the power
circuit board.
Power light (LED 1)
6 blinks
(Temperature detection
error (Control circuit
board))
An abnormal tem-
perature has been
detected.
If the temperature on the control circuit board rises because of the
overuse, the hand dryer stops the operation.
Leave it until the temperature falls, and then check if the error oc-
curs again.
Malfunction of the
control circuit board
If the error persists after performing the above, replace the control
circuit board.
Power light (LED 1)
7 blinks
(Microcomputer error)
Malfunction of the
control circuit board
Replace the control circuit board.

─13 ─
Symptom Cause Check Method and Remedy
The hand dryer does not
blow warm air.
(For JT-S2AP type)
Malfunction of the
heater switch
After checking that the connector is securely connected, meas-
ure the resistance across the heater switch on the control circuit
board. If the resistance is not normal, replace the control circuit
board.
Switch (SW1-2) Resistance Judgment
ON state 0 ΩNormal
OFF state ∞ΩNormal
Blown thermal
fuse of the heater
Measure the resistance between the heater lead connectors (red
and white).
If it is ∞Ω, replace the heater (PTC).
Ambient tempera-
ture is low.
When the ambient temperature is 18°C or lower, the hand dryer,
which is equipped with the simple heater, does not blow suffi-
ciently warm air.
Malfunction of
the power circuit
board
If the error persists after performing the above, replace the power
circuit board.
The hand dryer does not
stop blowing air.
Dirt on the sensor
area
Check if the sensor window gets dirty.
Influence of light Check if the sensor area is exposed to sunlight or strong light.
Malfunction of
the power circuit
board
If the error persists after performing the above, replace the power
circuit board.
Malfunction of
the control circuit
board
If the error persists after replacing the power circuit board, re-
place the control circuit board.
The air speed cannot be
changed.
Malfunction of
the control circuit
board
Replace the control circuit board.
The hand dryer does not
blow air even though hands
are inserted.
Hands are too
far away from the
sensor.
Sensitivity range of the sensor is 9 cm directly below the sensor.
When inserting hands, place hands close to the sensor.
Troubles without error display

─14 ─
10. Before receiving repair requests
Frequently asked question Response
1 The hand dryer does
not blow air even
though hands are
inserted. (It may not
stop blowing air in
the case of 3.)
The power light is not
turned on.
1If the power wires are disconnected, securely connect
them to the terminal block.
2If the circuit breaker is OFF, turn it ON.
Cases other than the
above
3The sensor area may get dirt, clean up the sensor area.
2 The hand dryer does
not blow warm air.
(For JT-S2AP type)
The heater switch is
not turned on.
1If the heater switch (SW1-2) is OFF, turn it ON.
Ambient temperature
is low.
2When the room temperature is 18°C or lower, the hand
dryer, which is equipped with the simple heater, does not
blow sufficiently warm air.
3 Air blow is too weak to dry hands quickly. 1If the air speed is set at STANDARD, switch it to HIGH.
2If the filter is clogged, clean it up.
11. Service inspection list
Location Inspection Item Check Result
Electric wiring Are lead wire connectors connected securely?
Is the wiring correct?
Operation Does the hand dryer operate properly?
Isn’t there any abnormal noise, vibration, etc.?
Power light Does the light (LED) come on?
Filter Is the filter inserted into the proper position?
Wall installation Isn’t there any gaps between the product and the back wall?

─15 ─
Front panel
2Unhook the inside claws (Indicated by ) of the front panel from the
base, and remove the front panel. →See page 5.
(2) Control circuit board (JT-37MH/JT-37M)
12. Overhauling procedures
Work precautions
• Before replacing parts, follow the instructions described in the troubleshooting.
• When servicing, always take care to keep proper footing.
• Before starting the service, always unplug the power cord from the outlet, or turn off the circuit breaker when
no power cord plug is provided. Sufficient care must be taken to avoid electric shock or injury.
• Make sure to connect the power supply wires correctly.
• After completing repairs, check that the unit operates properly.
Always wear gloves when servicing.
The part names in the text are standardized with the part names in the parts catalog. (There are some exceptions.)
(1)Turn off the power supply.
• Turn off the circuit breaker on the distribution board.
1Remove the front panel clamping screw.
(One PT screw 4 x 14, indicated by )
3Unscrew the screw to remove the control circuit board.
(One PTT screw 4 x 14, indicated by )
Precaution for the models equipped with the heater
Be aware that the earth lead wire is connected between the front
panel and blower parts.
Blower parts
Earth lead wire
Control circuit board (JT-37MH/JT-37M)
For JT-S2AP type
CN 202CN 201
Front panel
<A bottom view of the product>
Tightening torque:
1.0 ± 0.1 N.m
4Disconnect the connectors (CN201 and CN202) from the control
circuit board.
Tightening torque:
1.0 ± 0.1 N.m

─16 ─
3Disconnect the connector from the sensor circuit board.
(Indicated by )
4Remove the sensor circuit board.
Sensor circuit board (JT-37S)
Assembly precautions
• Run the lead wires through the grooves of the blower cover.
(Indicated by )
• Take care not to pinch the lead wires.
(3) Sensor circuit board (JT-37S)
1Remove the front panel. →See (2) 1and 2.
2Unhook the claw (indicated by ) of the sensor fix plate from the
nozzle, and then remove the sensor fix plate.
Sensor fix plate
Nozzle
Assembly precautions
• Run the lead wires through the groove of the nozzle. (Indicated by
)
• Take care not to pinch the lead wires.
(4) Power circuit board (JT-37PH/JT-37P)
1Remove the front panel. →See (2) 1and 2.
2Unscrew the screw to remove the circuit board cover.
(One PTT screw 4 x 6, indicated by )
Circuit board cover
3Disconnect the connectors from the power circuit board.
Power circuit board
(JT-37PH/JT-37P)
*The picture shows JT-37PH.
Blower cover
Blower lead
TAB4 TAB3
Heater lead
CN 101
Tightening torque:
1.0 ± 0.1 N.m

─17 ─
4Unscrew the screws.
(Two SW-PW · PP screws 4 x 8, indicated by )
5Unscrew the clamping screw for the power circuit board.
(One PTT screw 4 x 14, indicated by )
Power circuit board
(JT-37PH/JT-37P)
Precaution
When removing the screw, pay attention not to drop the power
circuit board.
6Remove the power circuit board from the PCB fix plate.
Power circuit board
(JT-37PH/JT-37P)
Assembly precaution
Fit the power circuit board into the claws of the PCB fix plate.
(Indicated by )
PCB fix plate
For JT-S2AP type
(5) Heater (PTC) (with the thermal fuse)
1Remove the front panel .→See (2) 1and 2.
2Disconnect the white lead connector (CN202) from the control circuit
board. →See (2) 4.
3Disconnect the heater lead connector (CN101) from the power circuit
board. →See (4) 1to 3.
4Unscrew the nozzle clamping screws.
(Four PTT screws 4 x 14, indicated by )
Precaution
When removing the screws, pay attention not to drop the sensor fix
plate.
Assembly precaution
Tighten the screws in a crisscross pattern. Sensor fix plate
Nozzle
Tightening torque:
1.0 ± 0.1 N.m
Tightening torque:
1.0 ± 0.1 N.m
Tightening torque:
1.0 ± 0.1 N.m

─18 ─
Heater (PTC)
5Remove the heater (PTC) with the heater fittings.
Assembly precautions
• Run the lead wires through the grooves of the blower cover.
(Indicated by )
• Take care not to pinch the lead wires.
Heater fitting
Assembly precautions
• Run the heater lead wires as shown in the picture at right.
• Fit the thermal fuse parts into the grooves of the heater fittings.
(Indicated by )
• Align the cable ties with the edge of the grooves. (Indicated by )
Blower cover
(6) Blower assembly (Thermal fuse of the motor)
1Remove the front panel. →See (2) 1and 2.
2Disconnect the connectors (CN201 and CN202) from the control
circuit board. →See (2) 4.
3Disconnect the blower lead connectors (TAB3 and TAB4) from the
power circuit board. →See (4) 1to 3.
4Push the cord bush into the blower cover. (Indicated by )
Assembly precautions
• Attach the cord bush as shown in the picture at right.
• Make sure that there is no slack in the lead wires inside the blower
cover.
Cord bush

─19 ─
5Unscrew the screw to remove the intake air duct.
(One PTT screw 4 x 14, indicated by )
Intake air duct
Assembly precaution
Set the intake air duct in the groove of the blower cover. (Indicated
by )
Blower assembly
8Remove the blower stopper.
9Remove the blower assembly.
Assembly precautions
• Set the blower assembly horizontally.
•
When installing the blower stopper, make sure that it is not loose.
Blower stopper
When reassembling
Reassemble the unit in the reverse order of disassembly.
After reassembly, always make a test run to make sure that the unit
operates properly.
6Unscrew the blower cover clamping screws.
(Four PTT screws 4 x 14, indicated by )
Blower cover
Tightening torque:
1.0 ± 0.1 N.m
Tightening torque:
1.0 ± 0.1 N.m
7Remove the cord bush from the lead wires.
→See the picture of (6) 4.

─20 ─
13. Parts catalog
Please note the following when using the parts catalog.
1. When ordering parts, always indicate the part number, part name, and the number of
parts required.
2. It may take time for you to receive the parts. Make an inquiry about a rush order.
3. Specifications may be subject to change without notice.
4. Parts marked with are critical for safety.
5. To maintain safety and performance, always replace the parts with the parts prescribed.
6. When replacing the parts to which the nameplate is attached, remove the nameplate
and attach it to the new parts.
Abbreviation Description
PC screw Cross recess flat head machine screw
PRC screw Cross recess oval head machine screw
PP screw Cross recess pan head machine screw
SW · PP screw Cross recess pan head screw with spring washer
PPT screw Cross recess tapping screw
PCT screw Cross recess flat head tapping screw
PTT screw Cross recess truss head tapping screw
PT screw Cross recess truss head machine screw
SET screw Slotted head stop screw
SQ · SET screw Square head stop screw
P · SET screw Pan head stop screw
PMT screw Primer truss head screw
HS · SET screw Hexagon head stop screw
P · R · W screw Cross recess round wood screw
P · C · W screw Cross recess flat head wood screw
P · R · C · W screw Cross recess round and flat wood screw
R · W screw Slotted round wood screw
PW · PP screw Cross recess pan head screw with small washer
SW-PW · PP screw Cross recess pan head machine screw with spring washer and flat washer
Description of screw abbreviations
Screw 4×
16
Screw diameter Length