8-7
Fault Display Probable causes and remediesMeaning
BUS
Option Com Err
CompoBus/D communications
error.
Communications error
occurred in the CompoBus/D
Communications Card.
• Communications cable was broken, short-cir-
cuited, or wired incorrectly.
→ Check wiring of communications cables and
correct the fault.
• Hardware on the Master end is faulty.
→ Check the Master and take necessary mea-
sures.
• Data was damaged due to noise.
→ Change to special communications cables or
shielded cables and ground the shields on the
Master end or power supply end.
→ Separate communications cables from other
lines
and install a noise filter on the power sup
-
ply.
• The Optional Card was damaged.
→ If wiring is correct and if the problem persists,
replace the Optional Card.
CPF00
COM-ERR (OP&INV)
Communications with the
Operator were not established
within 5 seconds after the
power was turned on.
• The Digital Operator’s connector isn’t connected
properly.
→ Disconnect the Digital Operator and then con-
nect it again.
• The Inverter CPU’s peripheral element is faulty.
→ Replace the Inverter.
CPF01
COM-ERR (OP&INV)
After communications were
established, there was a
transmission error with the
Digital Operator for more than
2 seconds.
• The Digital Operator isn’t connected properly.
→ Disconnect the Digital Operator and then con-
nect it again.
• The Inverter CPU’s peripheral element is faulty.
→ Replace the Inverter.
CPF02
BB Circuit Err
Baseblock circuit error → Try turning the power supply off and on again.
• The control circuit is damaged.
→ Replace the Inverter.
CPF03
EEPROM Error
EEPROM error → Try turning the power supply off and on again.
• The control circuit is damaged.
→ Replace the Inverter.
CPF04
Internal A/D Err
CPU internal A/D converter
error
→ Try turning the power supply off and on again.
• The control circuit is damaged.
→ Replace the Inverter.
CPF05
External A/D Err
CPU external A/D converter
error
→ Try turning the power supply off and on again.
• The control circuit is damaged.
→ Replace the Inverter.
Maintenance Operations Chapter
8
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