Mitsubishi Electric JT-SB116JH-G-NA Handbook page 14

Error Mode Display
Power Heater
(Fuse is blown)
Power Heater
or
(Tamper-proof timer)
Power Heater
( Overvoltage or undervolt-
age detection)
Power Heater
(Motor start error)
(Motor lock)
(Motor over-revolution)
Power Heater
(Motor overcurrent error)
( Current detection circuit
error)
Power Heater
( Motor signal error)
Power Heater
(Microcomputer error)
Checkpoint
Malfunction of If no error is found after checking the above, replace the control
the control circuit circuit board (JT-30M4/JT-30M4A).
board (JT-30M4/
JT-30M4A)
Malfunction of If the hand dryer does not operate even after replacing the control
the power circuit circuit board (JT-30M4/JT-30M4A), replace the power circuit board
board (JT-34P1H) (JT-34P1H).
Remaining foreign Check for any objects left over and shielding the sensor in the hand
object 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 (JT-30S3) connector CN12
sensors 2 Sensor circuit board (JT-30S2) (2 locations) connectors CN15
3 Light receiving circuit board (JT-30S1) connector CN11
4 Control circuit board (JT-30M4/JT-30M4A) connectors CN7 and CN8
Malfunction of If no error is found after checking the above, replace the control
the control circuit circuit board (JT-30M4/JT-30M4A).
board (JT-30M4/
JT-30M4A)
Abnormal power Check that correct power supply voltage is applied.
supply voltage • 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
Malfunction of If no error is found after checking the above, replace the power
the power circuit circuit board (JT-34P1H).
board (JT-34P1H)
Motor malfunction Check that the motor is not locked, and turns smoothly by hand.
Malfunction of If no error is found after checking the above, replace the power
the power circuit circuit board (JT-34P1H).
board (JT-34P1H)
Blower (assem- If the error display persists after replacing the power circuit board
bly) malfunction (JT-34P1H), 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 and White and between Red
fuse of the motor and Black of 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-34P1H) circuit board (JT-34P1H).
Connector discon- Check if the connector CN5 on the control circuit board (JT-30M4/JT-
nection 30M4A) or CN2 on the power circuit board (JT-34P1H) is disconnected.
Malfunction of If no error is found after checking the above, replace the power
the power circuit circuit board (JT-34P1H).
board (JT-34P1H)
Malfunction of Replace the control circuit board (JT-30M4/JT-30M4A).
the control circuit
board (JT-30M4/
JT-30M4A)
Check Method and Remedy
circuit board (JT-34P1H) may blow.
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