3-56
Check code
Operation cause
[04]
Inverter communication alarm
1. Connection error of communication cable between IPDU
and interface P.C. boards
2. Defective interface P.C. board
3. Defective IPDU P.C. board
4. Noise from outside
Replace communication cable.
Correction of connector connection
NO
NO
YES
YES
YES
YES
NO
NO
Interface P.C. board is defective.
IPDU P.C. board is defective.
Is there no disconnection
of communication cable
between IPDU and
interface P.C. boards?
Is communication connector
between IPDU and interface
P.C. boards connected?
Check noise from outside, etc.
Is there voltage deflection
between 3 and 5 pins of
CN600 on interface P.C. boards?
[Measurement by tester :
DC 0 to 5V, 5 pin GND ]
Is there voltage deflection
between 4 and 5 pins of
CN600 on interface P.C. boards?
[Measurement by tester :
DC 0 to 5V, 5 pin GND ]
On IPDU P.C. board : CN07
On interface P.C. board : CN600
3-6-4. Diagnostic Procedure for Check Code
