Mitsubishi Electric JT-SB116JH2-S-NA Handbook page 13

Error Mode Display
Power Heater
or
(Tamper-proof timer)
Power Heater
(Motor step-out)
(Motor lock)
(Motor overspeed)
Power Heater
( Motor current detection
error)
Power Heater
( Overvoltage/Undervoltage
detection)
Power Heater
( Motor signal error)
Power Heater
(Microcomputer error)
Checkpoint
Dirty sensor Dirt may shield the sensors. Wipe the dirt off the sensor window.
window
Remaining foreign Check for any objects left over and shielding the sensor in the hand
object drying area.
Connector dis- Check if the following connectors are disconnected.
connection for the 1 Sensor circuit board (JT-30S3R) connector CN12
sensors 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 If no error is found after checking the above, replace the control
the control circuit circuit board.
board
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.
board
Blower (assem- If the error display persists after replacing the power circuit board,
bly) malfunction 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 circuit board.
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.
board
Connector discon- Check if the connector CN5 on the control circuit board, CN2 on
nection the power circuit board, or CN30 or CN31 on the filter circuit board
is disconnected.
Malfunction of If no error is found after checking the above, replace the control
the control circuit circuit board.
board
Malfunction of Replace the control circuit board.
the control circuit
board
Check Method and Remedy
circuit board may blow.
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