Mitsubishi Electric JT-SB116EH-W-CA, Handbook

Page: 19 / 46

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