Mitsubishi Electric JT-SB116EH-W-CA, Handbook

Page: 22 / 46

Incorrect wiring
—23—
Phenomenon
Check CN7, 8 and 9 for incorrect connection to the control
circuit.
(If they are connected incorrectly, the motor turns in the
reverse direction.)
Check Method and Remedy
Clogged filter
Abnormal noise
Defective control
circuit
Defective wind
volume knob
1 Turn OFF the power switch once and then back ON again.
2
Error occurs at the power ON.
3 Take action for the error occurred according to the
instruction of troubleshooting.
–
Cause
Check if CN3, CN16 or CN17 is disconnected. (CN16 is on the
indicator circuit board and CN17 on the volume circuit board.) Disconnected wind
volume lead wire
Disconnecting CN3 from the control circuit, check if the
resistance between pins 1 and 2 at the lead wire side changes
within the following range when the wind volume knob is turned.
Unless the normal value is detected, replace the wind volume knob.
Operation continues after
pulling hands out.
Normal Value
0~10 k
Ω
Troubles without error display
Wind volume knob does not
change the wind volume.
Check for any foreign matters sticking to the motor vanes.
Sucking of foreign
matters
If no error is found after checking the above, replace the
control circuit.
Check the filter for clogging with dust, etc.