Mitsubishi Electric Jet Towel JT-SB216JSH-H-E, Handbook

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Error Mode Display Checkpoint Check Method and Remedy
Power Heater/Check
(Fuse is blown)
Connector discon-
nection between
the circuit boards Check if the connector CN2 on the power circuit board (JT-30P3H/
JT-30P3) or CN5 on the control circuit board (JT-30M3/JT-30M2) is
disconnected.
Malfunction of
the control circuit
board (JT-30M3/
JT-30M2) If no error is found after checking the above, replace the control
circuit board (JT-30M3/JT-30M2).
Malfunction of
the power circuit
board (JT-30P3H/
JT-30P3) If the hand dryer does not operate even after replacing the control
circuit board (JT-30M3/JT-30M2), replace the power circuit board
(JT-30P3H/JT-30P3).
Power Heater/Check
or
(Tamper-proof timer)
Leftover object Check for any objects left over and shielding the sensor in the hand
drying area.
Dirty sensor
window Dirt may shield the sensors. Wipe the dirt off the sensor window.
Connector dis-
connection for the
sensors Check if the following connectors are disconnected.
1 Sensor circuit board (lower) (JT-30S3) connector CN12
2
Sensor circuit board (middle) (JT-30S2) (2 locations) connectors
CN15
3 Light receiving circuit board (JT-30S1) connector CN11
4 Control circuit board (JT-30M3/JT-30M2) connectors CN7 and
CN8
Malfunction of
the control circuit
board (JT-30M3/
JT-30M2) If no error is found after checking the above, replace the control
circuit board (JT-30M3/JT-30M2).
Power Heater/Check
( Overvoltage or undervolt-
age detection)
Abnormal power
supply voltage Check if correct power supply voltage is applied.
• The error will occur if the power supply voltage is approx. 359 V
AC or over, or approx. 127 V AC or under.
*Note: If 359 V AC or over is applied, a current fuse on the power
circuit board (JT-30P3H/JT-30P3) may blow.
Malfunction of
the power circuit
board (JT-30P3H/
JT-30P3) If no error is found after checking the above, replace the power
circuit board (JT-30P3H/JT-30P3).
Power Heater/Check
(Motor start error)
(Motor lock)
(Motor over-revolution)
Motor malfunction Check if the motor is locked or turns smoothly by hand.
Malfunction of
the power circuit
board (JT-30P3H/
JT-30P3)
If no error is found after checking the above, replace the power
circuit board (JT-30P3H/JT-30P3).
Blower (assem-
bly) malfunction If the error display persists after replacing the power circuit board
(JT-30P3H/JT-30P3), replace the blower (assembly).
Power Heater/Check
(Motor overcurrent error)
( Current detection circuit
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 - White and Red - Black of
the motor lead wires. If it is
∞Ω , replace the blower (assembly).
Malfunction of
the power circuit
board (JT-30P3H/
JT-30P3) 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 (JT-30P3H/JT-30P3).