Mitsubishi Electric JT-SB216JSH2-H-NE, Handbook

Page: 14 / 57

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Error Mode Display Checkpoint Check Method and Remedy
Power Heater/Check
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 (JT-30S1R) connector CN11
4 Control circuit board (JT-30M8A/JT-30M8/JT-30M9A) connec-
tors CN7 and CN8
Malfunction of the
control circuit board
(JT-30M8A/JT-
30M8/JT-30M9A) If no error is found after checking the above, replace the control
circuit board (JT-30M8A/JT-30M8/JT-30M9A).
Power Heater/Check
(Motor start error)
(Motor lock)
(Motor over-revolution)
Motor malfunction Check that the motor is not locked and turns smoothly by hand.
Malfunction of
the power circuit
board (JT-30P8H)
If no error is found after checking the above, replace the power
circuit board (JT-30P8H).
Blower (assem-
bly) malfunction If the error display persists after replacing the power circuit board
(JT-30P8H), 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 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 (JT-30P8H) 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-30P8H).
Power Heater/Check
( Motor power error)
Abnormal power
supply voltage Check that 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-30P8H) may blow.
Malfunction of
the power circuit
board (JT-30P8H) If no error is found after checking the above, replace the power
circuit board (JT-30P8H).
Power Heater/Check
( Motor signal error)
Connector discon-
nection Check if the connector CN5 on the control circuit board (JT-30M8A/
JT-30M8/JT-30M9A) or CN2 on the power circuit board (JT-30P8H)
is disconnected.
Malfunction of the
control circuit board
(JT-30M8A/JT-
30M8/JT-30M9A) If no error is found after checking the above, replace the control
circuit board (JT-30M8A/JT-30M8/JT-30M9A).
Power Heater/Check
(Microcomputer error)
Malfunction of the
control circuit board
(JT-30M8A/JT-
30M8/JT-30M9A) Replace the control circuit board (JT-30M8A/JT-30M8/JT-30M9A).