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13
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Error Mode Display
Checkpoint
Check Method and Remedy
Power
Heater
or
(Tamper-proof timer)
Dirty sensor
window
Dirt may shield the sensors. Wipe the dirt off the sensor window.
Remaining foreign
object
Check for any objects left over and shielding the sensor in the hand
drying area.
Connector dis-
connection for the
sensors
Check if the following connectors are disconnected.
1
Sensor circuit board (JT-30S3R) connector CN12
2
Sensor circuit board (JT-30S2R) (2 locations) connectors CN15
3
Light receiving circuit board connector CN11
4
Control circuit board connectors CN7 and CN8
Malfunction of
the control circuit
board
If no error is found after checking the above, replace the control
circuit board.
Power
Heater
(Motor step-out)
(Motor lock)
(Motor overspeed)
Motor malfunction Check that the motor is not locked and turns smoothly by hand.
Malfunction of
the power circuit
board
If no error is found after checking the above, replace the power
circuit board.
Blower (assem-
bly) malfunction
If the error display persists after replacing the power circuit board,
replace the blower (assembly).
Power
Heater
( Motor current detection
error)
Motor overload
Check for causes of motor overload. (Too much higher power sup-
ply voltage, any object disturbing the motor revolution, etc.)
Connector dis-
connection for the
motor
Check if the motor lead wire connectors (black, white, and red) are
disconnected.
Blown thermal
fuse of the motor
Measure the resistance between Red and White and between Red
and Black of the motor lead wires. If it is
∞
Ω
, replace the blower
(assembly).
Malfunction of
the power circuit
board
If no error is found after checking the above, or if the error display
persists after replacing the blower (assembly), replace the power
circuit board.
Power
Heater
( Overvoltage/Undervoltage
detection)
Abnormal power
supply voltage
Check that correct power supply voltage is applied.
• The error will occur if the power supply voltage is approx. 170 V
AC or over, or approx. 60 V AC or under.
*Note: If 170 V AC or over is applied, a current fuse on the power
circuit board may blow.
Malfunction of
the power circuit
board
If no error is found after checking the above, replace the power
circuit board.
Power
Heater
( Motor signal error)
Connector discon-
nection
Check if the connector CN5 on the control circuit board, CN2 on
the power circuit board, or CN30 or CN31 on the filter circuit board
is disconnected.
Malfunction of
the control circuit
board
If no error is found after checking the above, replace the control
circuit board.
Power
Heater
(Microcomputer error)
Malfunction of
the control circuit
board
Replace the control circuit board.
