Mitsubishi Electric JT-SB116EH-W-CA Handbook page 19

Error Mode Display
Power Heater Check Blue LED
(No display. No Operation.)
Power Heater Check Blue LED
or
(Tamper prevention timer)
Power Heater Check Blue LED
(Motor over-revolution, out-of-order errors)
Power Heater Check Blue LED
(Motor start error, motor lock)
Power Heater Check Blue LED
(Over-current error)
Power Heater Check Blue LED
(Detection of over-voltage,
under-voltage)
Cause
When 120 V is supplied, check the following points.
Blown current Check if the current fuses (FUSE1, 2, 3) on the control circuit
board are blown or not.
fuse
If any current fuse is blown, replace the control circuit board.
If any voltage higher than 120V is applied by an error during
the power supply work, FUSE3 (5A) may be blown and ZNR1
may be destroyed.
Blown motor
1Check if the relay connector of motor temperature fuse is
temperature fuse
disconnected. (In the terminal block box)
2Check if TAB5 and TAB6 connectors are disconnected.
3To see if the motor temperature fuse is blown, measure the
resistance between motor lead wires "Blue-Blue".
Disconnected indicator Check if CN6 or CN11 is disconnected.
circuit board lead wire (CN11 is on the indicator circuit board.)
Defective control If no error is found after checking the above, replace the
circuit control circuit board.
Leftover object Check for any object left over and shielding the sensor in the
drying area.
Dirty sensor Dirty window may shield incoming light. Make clean the
window sensor window.
Defective motor Replace the motor.
Defective control If no error is found after checking the above, replace the
circuit control circuit.
Defective motor Check if the motor is locked or does it turn smoothly by hand.
Defective control If no error is found after checking the above, replace the
circuit control circuit.
Connection error Check if TAB5, 6, 7, 8 or 9 is connected incorrectly to the
control circuit.
Motor overload Check for causes of motor overload. (Too much higher power
supply voltage, any object disturbing the motor revolution,
etc.)
Defective control If no error is found after checking the above, replace the
circuit control circuit.
Application of Check if correct power supply voltage is applied.
over-voltage • Error will occur if the power supply voltage is at about AC162V or over.
Application of Check if correct power supply voltage is applied.
under-voltage • Error will occur if the power supply voltage is at about AC60V or under.
Defective control If no error is found after checking the above, replace the
circuit control circuit.
— 20 —
Check Method and Remedy
Blue
Blue
Red
Black
White
Normal value: 0 Ω
Abnormal value:
side
Tester
side
∞
Ω