Mitsubishi Electric JT-SB216ESH-W-CE User manual

HAND DRYER
HAND BOOK
)
Model: JT-SB216ESH-W-CE
JT-SB216ESH-DG-CE
FOR DEALERS
Nameplate
February 2010 No. U131-B
Repair work should be performed by
the manufacturer, its service agent or
similarly qualified person in order to
avoid hazards.

Contents
1. Safety precautions ································································· 3–4
2. Features·················································································4–5
3. Improved points·········································································· 5
4. Names and functions of components ····································6–7
5. Specifications ·············································································8
6. Outside dimensions····································································8
7. Electrical wiring diagram·····························································9
8. Basic circuit diagram···························································10–16
9. Principles of operation························································17–18
10. Troubleshooting··································································19–23
11. How to call················································································ 24
12. Service inspection list······························································· 24
13. Disassembly and assembly················································25–33
14. Parts catalog·······································································34–58
JT-SB216ESH-W-CE ······················································35–46
JT-SB216ESH-DG-CE ···················································· 47–58

—3—
Items that may cause injury and/or damage to buildings
and/or fixtures if the product is mishandled.
Caution
Items that may cause death or serious injury if the prod-
uct is mishandled.
Warning
Caution for electric shock
If it is absolutely necessary to inspect the circuitry
while turning on electricity, exercise caution not to
touch live parts.
(Touching live parts may cause electric
shock.)
Modification prohibited
Never modify the product.
(Modifying may cause electric shock, fire,
and/or injury.)
Conduct electric work correctly
• Use the designated electric wires, and conduct
electric work according to the Electrical Equipment
Technical Standard, Internal Wiring Regulation, and
Installation Work Guide.
• Be sure to check whether the terminals
and fixed wiring are securely connect-
ed.
(Improper connection or installation may
cause electric shock or fire.)
Scratches and deterioration
Be sure to replace scratched and/or
deteriorated wiring and lead wires.
(They may cause electric shock and/or fire.)
Turn off the power
Be sure to turn off the earth leakage breaker and the
power switch of the product’s main unit prior to start-
ing repair work. (The charge voltage in the circuitry
remains for 90 seconds or so, even after the power is
turned off and the LED is unlit; therefore, wait for at
least 90 seconds before disassembling
the product.)
(Not turning off the power may cause electric
shock.)
Use proper parts and tools
Use the parts listed in the service parts list of the sub-
ject model with appropriate tools when
repairing.
(Using improper parts and tools may cause
electric shock, fire, and/or injury.)
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 cause electric
shock.)
Caution for high temperatures
Wait untill the regenerative heater of heater unit cools
down sufficiently before starting
inspection or repair.
(It may cause burn.)
1. Safety precautions
GPlease read the following items carefully before using this product, and perform the maintenance and repair work
of the product correctly and safely.
GThe types and levels of the dangers from mishandling this product are categorized and indicated by the signs
shown below.
Caution for
electric shock
Implement by always
following instructions
Implement by always
following instructions
Implement by always
following instructions
Prohibited
Implement by always
following instructions
Implement by always
following instructions
Implement by always
following instructions
Wear gloves
Always wear a pair of gloves during inspection or
repair work.
(Not wearing gloves may cause injury.)
Implement by always
following instructions

—4—
2. Features
1Quick drying
Equipped with a turbo fan, the hand dryer blows away drops of water on the hands with a high-speed jet
air from a large wind volume, high-speed blower, thus quickly drying hands.
Drying time has been reduced considerably compared with old model (JT-SB216DS).
2Reduction of operating sound by 6dB
Employment of a hyper-nozzle, based on our own blast flow control technology, which eliminates
turbulences as well as interfering sounds of air flows, has reduced the operating sound by 6 dB.
3Wind volume adjust knob
Wind volume can be changed, as you like, with this knob.
4Ergonomic design
The product is finished up in an ergonomic design that fuses sharp lines well matched with the sanitary
space and round lines for convenience of use.
5Hygienic
• The hand dryer is automatically started by a sensor. Thus, there is no need to touch the hand dryer with
your wet hands. It is very hygienic.
• It has a flat bottom at the hand inserting area and also the sides are widely open so that the unit can be
cleaned easily.
• Hand inserting sections can be disinfected with alcohol to keep them hygienic. Use the disinfecting
ethanol (Concentration less than 83%).
6Antibacterial
• The hand dryer uses a silver inorganic substance; thus, maintaining an antibacterial effect for an
extended period of time. (Hand inserting area, drain hose and drain tank)
• The hand dryer meets the antibacterial effect standard defined by the Society of Industrial Technology for
Antimicrobial Articles (SIAA).
7Easy maintenance
The hand dryer does not require a paper or cloth towel, thus eliminating the dumping paper waste and the
exchanging of towels. Also, the hand dryer is easy to clean.
8Highly safe with mischievous use prevention timer
To prevent continuous operations of the hand dryer by mischievous use or malfunction, it has a built-in
timer that automatically stops drying upon reaching a specific period of time.
OUpon completing repair work, verify that the product operates properly. Clean the product's main body and
surrounding area, and notify the customer of the completion of the repair work.
Items to check during repair work
• Inspect the condition of the earth. Correct it if improperly grounded. Also, check to see if an earth leakage
breaker or an overload protection device is being installed. If not, recommend the dealer to install one.
• Check to see whether or not the air filter and the drain tank are installed securely in place.
• Do not leave a towel or other object in the hand-drying area.
• Never place any object on the main body nor cover it.
• Make sure that the product is not being used in any of the following locations:
Locations where the temperature can exceed 0°C to 40°C.
Locations where the humidity can exceed 5%RH to 95%RH.
Locations where the unit may come into direct contact with water.
Locations where the unit is under direct or strong sunlight. (May cause sensor to malfunction.)
Locations where there is a lot of condensation.
Vehicles (incl. vessels, trains.)
Do not use in locations where corrosive, neutral, or reductive gases are present.
Avoid to install the unit any place where foods, tableware, or the likes are handled nearby because water
may splash.
Locations where salt damage may occur.
Places lower than -20m or higher than 2000m above sea level.

—5—
9Economical
The monthly electricity expense is the only expense the hand dryer requires. Thus, it is extremely
economical for use over an extended period of time.
0Hot jet air
A regular heat accumulating type heater is provided in the standard specification. It accumulates heat
while the hand dryer is not used and releases accumulated heat when the hand dryer is operated.
Pleasant hot jet air starts to blow instantaneously anytime when drying hands.
AHot air temperature control function
Hot air temperature is constantly at 35°C, regardless of the room temperature.
(Room temperature: 10~35°C)
BOptional function
The hand dryer may be installed on the floor using the optional special stand (JP-S15FS-H-E).
3. Improved points
Item Old Model
(JT-SB216DS)
Round hole nozzle
65
650
4
11
JP-S26FS-H-E
Nozzle
Noise (dB)
Rated power
consumption (W)
Rated current (A)
Weight (Kg)
Stand
Appearance
New Model
(JT-SB216ESH-W-CE, JT-SB216ESH-DG-CE)
Hyper-nozzle
59
1010~1200 (During heat accumulation by heater)
650 (Heater OFF)
4.6~5 (During heat accumulation by heater)
4.0 (Heater OFF)
14
JP-S15FS-H-E

—6—
Power controll section
Power
switch
Heater
switch
Switch
door
Air
speed
knob
 Shades areas in the figure indicate
antimicrobial material.
Drain tank
Unit
Heater
Drain hose
Hand-drying area
Check lamp
Power lamp
Display
Emblem Heater lamp
Black wall area
Sensor + Illumination lamp
Sensor
Air filter
-
+
OFF
ON
O
I
O
I
OFF
ON
Power
Air speed
Hea
ter
4. Names and functions of components
4-1 Structure and appearance

—7—
4-2 How to use the hand dryer
Open the switch door of the power controll section.
Turn on the power switch.
3.Close the switch door of the power controll section.
Power controll section
Display
Power
switch
Heater
switch
Air
speed
knob
Power lamp
With the heater switch ON
Check lamp
Heater lamp
Power CheckHeater Power CheckHeater
Power lamp
With the heater switch OFF
Check lamp
Heater lamp
In case of trouble or error
Power CheckHeater
Power lamp
With the power switch OFF
Check lamp
Heater lamp
Power lamp Check lamp
Heater lamp
Power CheckHeater
 Check lamp
When a malfunction or error occurs, the check lamp on the right side of the display will
either light up or flash. Turn the power switch off, wait approximately 40 seconds until the
all the lamps in the display go off, and then turn the power back on. If the check lamp is
still on or flashing, turn off the power, shut off the ground-fault circuit interrupter, and
 When not using the unit for long periods of time
(With the heater switch “OFF”)
* When the heater switch is turned “ON”, approx. 1100 W of power is
consumed to accumulate heat by operating the heater.
Turn the power switch off.
The unit consumes approximately 2W of power even if unused when the power is on.
With both hands open, insert them
all the way in
The unit will come on automatically.
Pull them out slowly,
letting the air blow the
water off.
Pull hands all the way
out.
Repeat until dry
1.
2.
Note:
 Power lamp and heater lamp turn on. (Display)
 Emblem lamp turns on.
 Illumination lamp turns on.
 Adjust the Air speed knob to the best point.

When the power switch is turned on, make sure to remove
hands from the hand-drying area. Take sufficient care to
avoid this because it may deteriorate the sensitivity of sensor.
-
+
O
FF
O
N
O
I
O
FF
O
N
Po
wer
Air speed
Hea
ter
123
Check lamp
Power lamp
Display
Emblem Heater lamp
Introduction
Swicth
door
O
I
refer to "10.Troubleshooting (page19)".

—8—
Model
0.859
JT-SB216ESH-W-CE
JT-SB216ESH-DG-CE
Rated
Voltage
(V)
220~240
Rated
Frequency
(Hz)
50-60
Power Consumption
(W)
1010~1200 (During heat
accumulation)
(During hand drying: 650)
Rated Current
(A)
4.6~5 (During heat
accumulation)
(During hand drying: 4.0)
Weight
(kg)
14
Drain Tank
(R)
Noise
(dB)
Terminal block location
Terminal block
location
Heater switch
Switch door
Wind volume knob
Power switch
Drain tank
Air filter
Power cord hole
(On the back)
 Mounting plate dimensions
Unit (mm)
5. Specifications
6. Outside dimensions
JT-SB216ESH-W-CE, JT-SB216ESH-DG-CE

—9—
JT-SB216ESH-W-CE, JT-SB216ESH-DG-CE
7. Electrical wiring diagram

—11——10—
Bus voltage (Being stopped): DC310V, DC324V, DC338V
(JT-24M: TAB5) Power supply voltage: AC220
V , AC230V, AC240V
(JT-24M: Between TAB1-TAB2)
Heater power supply (With heater ON): AC220V, AC230V, AC240V
(JT-24M: Between TAB3-TAB4)
0V (JT-24M: CN7 5P)
15V (JT-24M: CN7 1P)
5V (JT-24M: CN6 1P)
Clock frequency 8MHz (JT-24M: IC2 14P) Reset input 5V (JT-24M: IC2 11P)
Reset input 5V (JT-24M: IC1 11P)
Clock frequency 8MHz (JT-24M: IC1 14P)
Carrier frequency 13.9kHz (JT-24M: IC1 3P)
8. Basic circuit diagram
8-1 Circuit diagram and check points
(1) Main circuit (JT-24M)

—12—
(2) Sub circuit (JT-24S)

—13—
10°C 9.01kΩ2.37V
20°C 6.13kΩ1.90V
30°C 4.27kΩ1.50V
150°C 29.84kΩ3.74V
200°C 8.00kΩ2.22V
250°C 2.72kΩ1.07V
25°C 330 or less 0.16V or less
70°C 1.5k or less 0.65V or less
80°C 2.2k or more 0.90V or more
Upper sensor's light receiving signal waveform (JT-24M: CN7 3P)
(JT-24S-B: CN14 3P)
Lower sensor’s light receiving signal waveform (JT-24M: CN7 2P)
(JT-24S-B: CN14 2P)
Lower sensor’s light emitting signal waveform (JT-24M: CN5 2P)
(JT-24S-C: CN15 2P)
100msec
(Rises when hands are inserted)
(Does not appear when hands are inserted)
(Influence of light emission by the lower sensor)
100msec
100msec
Room thermostat characteristics (JT-24M: CN4 2P)
Heater thermostat characteristics (JT-24M: CN9 2P)
FIN overheat detector characteristics (JT-24M: IC1 8P)
Resistance CN4 2P Voltage
Temperature
Resistance
PTC Resistance
CN9 2P Voltage
Input Voltage
Temperature
Temperature

—14—
Bus voltage (Being stopped): DC310V, DC324V, DC338V
(JT-24M: TAB5)
Power supply voltage: AC220V, AC230V, AC240V
(JT-24M: Between TAB1-TAB2)
Heater power supply (With heater ON): AC220V, AC230V, AC240V
(JT-24M: Between TAB3-TAB4)
5V (JT-24M: CN6 1P) 0V (JT-24M: CN7 5P)
15V (JT-24M: CN7 1P)
8-2 Circuit board diagram and check points
(1) Main circuit board (Control circuit board)

—15—
If the jumper wire (JA) is cut off, the illumination lamp turns off.
(3) Wind volume circuit board
(4) Light receiving circuit board
(5) Light emitting circuit board
(6) Illumination circuit board (Blue LED)
(2) Indicator circuit board

—16—
10°C 9.01kΩ2.37V
20°C 6.13kΩ1.90V
30°C 4.27kΩ1.50V
Upper sensor's light receiving signal waveform (JT-24M: CN7 3P)
(JT-24S-B: CN14 3P)
Lower sensor’s light emitting signal waveform (JT-24M: CN5 2P)
(JT-24S-C: CN15 2P)
100msec
(Rises when hands are inserted)
Lower sensor’s light receiving signal waveform (JT-24M: CN7 2P)
(JT-24S-B: CN14 2P)
(Does not appear when hands are inserted)
(Influence of light emission by the lower sensor)
100msec
100msec
Room thermostat characteristics (JT-24M: CN4 2P)
Heater thermostat characteristics (JT-24M: CN9 2P)
FIN overheat detector characteristics (JT-24M: IC1 8P)
Resistance CN4 2P Voltage
Temperature
150°C 29.84kΩ3.74V
200°C 8.00kΩ2.22V
250°C 2.72kΩ1.07V
Resistance CN9 2P Voltage
Temperature
25°C 330 or less 0.16V or less
70°C 1.5k or less 0.65V or less
80°C 2.2k or more 0.90V or more
PTC Resistance Input Voltage
Temperature

—17—
9. Principles of operation
ODescription of circuit operation
(1) Cautions for turning “ON / OFF” the power switch
1When the power switch is turned “ON”, the power lamp (LED1), blue emblem lamp (LED4) and illumination
lamps (LED10, 11) turn on after 1.5 seconds, and the hand dryer becomes ready for operation.
• Before the power lamp turns on, the hand dryer does not operate even if hands are inserted in the hand
drying area. In the meantime, the microcomputer of the main unit (IC2) performs the initial setting for the
power supply frequency judgment, setting of the hand detection sensor sensitivity, and others.
• In order to set correctly the sensitivity of hand detection sensor, don’t insert hands in the hand drying area
till the power lamp is turned on. (If the sensitivity is set abnormally, by neglecting this caution, for
example, an error is displayed and the operation stops. In such occasion, cancel the setting by turning off
the power switch.)
• Even if the hand dryer has started immediately after turning the power switch “ON” (less than 15
seconds), it is normal though the motor input may become slightly lower owing to the initial setting.
2When the power switch is turned “OFF”, the power lamp, blue emblem lamp and illumination lamps turn off
and the operation is inhibited.
• Circuitry takes about 40 seconds to discharge the voltage retained in them. Wait till the discharging time
elapses before plugging in or out connectors, replacing circuits, or others.
• When any error has occurred, the error display persists till the voltage retained in the circuitry is
discharged (till the microcomputer is reset).
(2) Hand detection and operation
1Hand detection sensor is an infrared sensor assembled with the light emitting sensor (infrared-emitting
diode), light receiving sensor (photo-diode), etc. and consists of the upper (this side) sensor and the lower
(inner) sensor.
2Reflection type upper sensor … The sensor detects the change in the reflected amount of infrared when
hands are inserted. Transmission type lower sensor … The sensor detects that the infrared is shielded
when hands are inserted.
3As the lower sensor detects hands, the blower motor turns on and the hand dryer starts to operate.
4Once the operation has started, it continues as long as either of upper and lower sensors detects hands.
5If then it elapses for 1.5 to 3 seconds without detecting hands by both upper and lower sensors, the blower
motor turns off and the operation stops.
6The hand dryer continuously operates up to 30 seconds.
• Once 30 seconds have elapsed, the hand dryer stops operating even if hands are detected.
• Since this is a function to override the presence of foreign object, the operation starts if hands are pulled
out and inserted again.
(3) Control of the blower motor
1DC brushless motor is used for the blower. This motor has no hole sensor to detect the rotor position, but
utilizes instead the counter electromotive voltage by the motor coil to judge the rotor position and the
revolving direction so as to drive the motor.
2Outputs from the motor control microcomputer (IC1) are transmitted via the drive IC (IC3) to control the
power step MOSFET (driving transistor) that drives the motor.

—18—
(4) Control of the heater temperature
1Room thermostat detects the room temperature while the heater thermostat monitors the heater
temperature.
2The room thermostat temperature determines the heater control temperature. (The colder the room
temperature, the heater control temperature becomes higher, and the hot air temperature is maintained at
about 35°C.)
3Heater turns ON/OFF depending on the heater control temperature, but it does not turn ON in the following
occasions.
• When the heater switch is turned “OFF” (Heater lamp is extinguished.)
• When the jet towel is operating
• When the room thermostat detection temperature is 35°C or higher
(5) Extinguishing of the illumination lamp
1If the jumper wire (JA) on the indicator circuit board (JT-24S-A) is cut off, the illumination lamp extinguishes.
2Before cutting off the jumper wire, make sure to turn the power switch “OFF” and wait for 40 seconds
minimum.
(6) Test mode (Error display mode)
1Content .….….….….Display the latest error occurred.
When no error is retained in the memory, the power lamp flickers quickly.
There is no other indication than the above. (Operation is inhibited.)
2Setting method ….…In the condition that a resistor of 4.7kΩis connected between pins 1 and 2 of CN8 on
the main circuit board, turn “ON” the power switch.
3Resetting method …Turn “OFF” the power switch. After waiting for more than 40 seconds, remove the
above resistor.

OWhen 220~240V is not supplied, check the following points.
Error Mode Display
—19—
Confirm that 220~240V is supplied between TAB1 and TAB2
of control circuit.
Confirm that the relay connector of power switch lead wire is
not disconnected. (In the power switch case)
Disconnected
relay connector
Description of the error mode display
Cause Check Method and Remedy
(No display. No Operation.)
Confirmation of
power supply
voltage
Confirm that the power switch is turned ON and that
220~240V is supplied at both ends of power cord connection
on the terminal block.
QWhen 220~240V is not supplied, check the following points.
1Check if the earth leakage breaker is turned ON.
2Check if the power cord is connected securely to the
terminal block.
Confirmation of
power supply voltage
on the control circuit
Measure the resistance between Blue-Orange wires and Brown-
Orange wires on the relay connector of power switch lead wire.
Defective power
switch
Switch (Power)
Relay connector
Orange Blue Blue
Brown Tester
Brown
Orange
Orange
Orange
side
side
Power
O
Heater
O
Check
O
Blue LED
O
O: ON : Slow flicker (ON for 0.4 seconds/OFF for 0.4 seconds)
O: OFF : Quick flicker (ON for 0.1 second/OFF for 0.1 second)
Troubles with error display
Power Heater Check Blue LED
Switch (Power) “ON” : 0Ω
Switch (Power) “OFF” :
∞
Ω
10. Troubleshooting
QWork precautions
• Before starting the service, try to reproduce the malfunction two or three times.
• 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 earth leakage 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 a circuit board, hold the side of the board to avoid exerting any undue stress on parts on the board.
• When removing a circuit board, take care not to injure any body parts with the sharp edges of the metal sheet.
• When disconnecting connectors, don’t hold the lead wire to pull. Instead, hold the whole housing section.
• When circuit board failure is considered to be 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 used in the following text correspond to those listed in the parts catalog.

OWhen 220~240V is supplied, check the following points.
—20—
Error Mode Display
O
O
Defective control
circuit
Defective control
circuit If no error is found after checking the above, replace the control circuit board.
Check if correct power supply voltage is applied.
• Error will occur if the power supply voltage is at about AC341V or over.
Application of
over-voltage
Check if correct power supply voltage is applied.
• Error will occur if the power supply voltage is at about AC128V or under.
Application of
under-voltage
If no error is found after checking the above, replace the
control circuit board.
Cause Check Method and Remedy
Check for causes of motor overload. (Too much higher power
supply voltage, any object disturbing the motor revolution,
etc.)
Check if CN6 or CN11 is disconnected.
(CN11 is on the indicator circuit board.)
Disconnected indicator
circuit board lead wire
If no error is found after checking the above, replace the
control circuit board.
Defective control
circuit
Blown current
fuse Check if the current fuses (FUSE1, 2, 3) on the control circuit
board are blown or not.
If any current fuse is blown, replace the control circuit board.
If any voltage higher than 220~240V is applied by an error
during the power supply work, FUSE3 (5A) may be blown and
ZNR1 may be destroyed.
(No display. No Operation.)
Power
O
Heater
O
Check
O
Blue LED
O
Normal value: 0Ω
Abnormal value:
∞
Ω
side
Tester
side
Blue
Blue
Red
Black
White
1Check if the relay connector of motor thermal fuse is
disconnected. (In the terminal block box)
2Check if TAB5 and TAB6 connectors are disconnected.
3To see if the motor thermal fuse is blown, measure the
resistance between motor lead wires “Blue-Blue”.
Blown motor
thermal fuse
Power
,
Power
O
Power
,
Power
O
Check for any object left over and shielding the sensor in the
drying area.
Leftover object
Dirty window may shield incoming light. Make clean the
sensor window.
Dirty sensor
window
Replace the blower (assembly).Defective blower
(assembly) If no error is found after checking the above, replace the
control circuit board.
Defective control
circuit
(Tamper prevention timer)
Heater
OorO
Check
O
Blue LED
O
(Motor over-revolution, out-of-order errors)
Heater Check
O
Blue LED
O
Check if the motor of the blower (assembly) is locked or does
it turn smoothly by hand.
Defective blower
(assembly)
If no error is found after checking the above, replace the
control circuit board.
Defective control
circuit
(Motor start error, motor lock)
Heater
O
Check
O
Blue LED
O
Check if TAB5, 6, 7, 8 or 9 is connected incorrectly to the
control circuit.
Connection error
Motor overload
(Over-current error)
Heater Check
O
Blue LED
O
(Detection of over-voltage,
under-voltage)
Power
O
Heater
O
Check
,
Blue LED
O

—21—
Power
If the power switch is turned ON while the sensor is shielded,
an error occurs.
Turn OFF the power switch, in the state that the sensor is not
shielded, and then turn ON again the power switch.
Check if TAB7, 8 or 9 is disconnected.
Visually check for cracks on the circuit board, corroded
electronic parts, defective soldering, etc.
Defective light
emitting circuit board
(Panel (front) side)
Disconnected light
emitting circuit board
Dirty sensor
window
Leftover object
Disconnected lead
wires of light
emitting circuit board
Sensor is
shielded at the
power ON.
Leftover object
Disconnected lead
wires of light
receiving circuit board
Disconnected light
receiving circuit board
Defective light
receiving circuit board
(Panel (back) side)
Defective control
circuit
Error Mode Display Cause Check Method and Remedy
Check screws clamping the heat sink for missing or
looseness.
Missing or loose
heat sink screws
If no error is found after checking the above, replace the
control circuit board.
Defective control
circuit
(Heat sink overheat error)
,
Heater
O
Check
,
Blue LED
O
Disconnected
motor lead wire
Power
O
Power
@
Power
,
Check if the lead wire of the light receiving circuit board (CN7 or
CN14) is disconnected. (CN14 is on the light receiving circuit board.)
Check the light receiving circuit board for disconnection or
displaced mounting position.
Visually check for cracks on the circuit board, corroded
electronic parts, defective soldering, etc.
Dirty window may shield incoming light. Make clean the
sensor window.
Check if the lead wire of the light emitting circuit board (CN5 or
CN15) is disconnected. (CN15 is on the light emitting circuit board.)
Check the light emitting circuit board for disconnection or
displaced mounting position.
If no error is found after checking the above, replace the
control circuit board.
Defective control
circuit
(Current detection circuit error)
Heater
O
Check
,
Blue LED
OIf no error is found after checking the above, replace the
control circuit board.
Check the inside of drying area for any object left over and
shielding the sensor.
Sensor is
shielded when
turning the power
switch ON.
Dirty window may shield incoming light. Make clean the
sensor window.
Dirty sensor
window
(Light receiving circuit board
error)
@Occurring at the power ON
Heater
O
Check
,
Blue LED
O
Check the inside of drying area for any object left over and
shielding the sensor.
(Light emitting circuit board
error)
@Occurring at the power ON
Heater
O
Check
@
Blue LED
O
If no error is found after checking the above, replace the
control circuit board.
Defective control
circuit
If the power switch is turned ON while the sensor is shielded,
an error occurs.
Turn OFF the power switch, in the state that the sensor is not
shielded, and then turn ON again the power switch.