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Mitsubishi Electric JT-SB216JSH-W-E Handbook page 16

Hand dryer
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Error Mode Display
Power
Heater/Check
(Fuse is blown)
Power
Heater/Check
or
(Tamper-proof timer)
Power
Heater/Check
( Overvoltage or undervolt-
age detection)
Power
Heater/Check
(Motor start error)
(Motor lock)
(Motor over-revolution)
Power
Heater/Check
(Motor overcurrent error)
( Current detection circuit
error)
Checkpoint
Connector discon-
Check if the connector CN2 on the power circuit board (JT-30P3H/
nection between
JT-30P3) or CN5 on the control circuit board (JT-30M3/JT-30M2) is
the circuit boards
disconnected.
Malfunction of
If no error is found after checking the above, replace the control
the control circuit
circuit board (JT-30M3/JT-30M2).
board (JT-30M3/
JT-30M2)
Malfunction of
If the hand dryer does not operate even after replacing the control
the power circuit
circuit board (JT-30M3/JT-30M2), replace the power circuit board
board (JT-30P3H/
(JT-30P3H/JT-30P3).
JT-30P3)
Leftover object
Check for any objects left over and shielding the sensor in the hand
drying area.
Dirty sensor
Dirt may shield the sensors. Wipe the dirt off the sensor window.
window
Connector dis-
Check if the following connectors are disconnected.
connection for the
1 Sensor circuit board (lower) (JT-30S3) connector CN12
sensors
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
If no error is found after checking the above, replace the control
the control circuit
circuit board (JT-30M3/JT-30M2).
board (JT-30M3/
JT-30M2)
Abnormal power
Check if correct power supply voltage is applied.
supply voltage
• 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
Malfunction of
If no error is found after checking the above, replace the power
the power circuit
circuit board (JT-30P3H/JT-30P3).
board (JT-30P3H/
JT-30P3)
Motor malfunction Check if the motor is locked or turns smoothly by hand.
Malfunction of
If no error is found after checking the above, replace the power
the power circuit
circuit board (JT-30P3H/JT-30P3).
board (JT-30P3H/
JT-30P3)
Blower (assem-
If the error display persists after replacing the power circuit board
bly) malfunction
(JT-30P3H/JT-30P3), replace the blower (assembly).
Motor overload
Check for causes of motor overload. (Too much higher power sup-
ply voltage, any object disturbing the motor revolution, etc.)
Connector dis-
Check if the motor lead wire connectors (black, white, and red) are
connection for the
disconnected.
motor
Blown thermal
Measure the resistance between Red - White and Red - Black of
fuse of the motor
the motor lead wires. If it is ∞Ω, replace the blower (assembly).
Malfunction of
If no error is found after checking the above, or if the error display
the power circuit
persists after replacing the blower (assembly), replace the power
board (JT-30P3H/
circuit board (JT-30P3H/JT-30P3).
JT-30P3)
Check Method and Remedy
circuit board (JT-30P3H/JT-30P3) may blow.
─ 16 ─

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