Protective and Diagnostic Functions
7-7
Self-Diagnosis Fault of Option
Board
Noise or spikes was on the con-
trol circuit input terminals or the
control board is damaged.
• Turn off the power and re-
install the option board.
• Remove all inputs from the
option board.
• Try to initialize the Inverter.
• Cycle the power to the
Inverter.
• Replace the Option Board.
• Replace the Inverter.
CPF21
Option CPU Down
Option Board Code Number
Fault
Unrecognizable option board is
connected to the control board.
CPF22
Option Type Err
Option Board Interconnection
Fault
An option board was not cor-
rectly connected to the control
board or an option board that was
not made for the Inverter is
attached to the control board.
CPF23
Option DPRAM Err
Table 7.1 Fault Detection
Display Meaning Probable Causes Corrective Actions
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