Mitsubishi Electric CITY MULTI P1016V-E Specifications download pdf (Page 120)

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Checking code Meaning, detecting method Cause Checking method & Countermeasure

Serial

transmission

abnormality

0403

If serial transmission cannot be

established between the MAIN and

INV boards.

1) Wiring is defective.

2) Switches are set wrong on the INV

board.

3) A fuse (F01) on the INV board is

defective.

4) The circuit board is defective.

Check 1, the connections, 2, contact

at the connectors and 3, for broken

wires in the following wiring.

CNRS2 - CNRS3

CNAC2 - TB1B

SW1-4 on the INV board should be

OFF.

If the fuse is melted, (if the resistance

between the both ends of fuse is ∞),

replace the fuse.

If none of the items in 1) to 3) is appli-

cable, and if the trouble reappears even

after the power is switched on again,

replace the circuit board by the follow-

ing procedure (when replacing the cir-

cuit board, be sure to connect all the

connectors, ground wires, etc. se-

curely).

1 If serial transmission is restored af-

ter the INV board only is replaced,

then the INV board is defective.

2 If serial transmission is not restored,

reinstall the INV board and replace

the MAIN board. If serial transmis-

sion is restored, the MAIN board is

defective.

3 If serial transmission is not restored

by 1 and 2 above, replace both

boards.

[3] Self-diagnosis and Countermeasures Depending on the Check Code Displayed

(1) Mechanical

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Mitsubishi Electric CITY MULTI P1016V-E Specifications Page 120

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