8-12
Fault
display
Probable cause and remedyFault name and Meaning
cal
(flashing)
Communications standby
(CAL)
No normal DSR message has
been received during
RS-422/4895 communications.
The Inverter detects this alarm
only when RUN command
selection (n003) is set to 2 or
frequency reference selection
(n004) is set to 6. Until the
alarm is reset, no input other
than communications input will
be ignored.
· A short-circuit, ground fault, or discon-
nection has occurred on the communica-
tions line.
® Check and correct the line.
· The termination resistance setting is
incorrect.
® In the case of RS-422
communications, set pin 1 of SW2 of
all Inverters to ON. In the case of
RS-485 communications, set pin 1 of
SW2 of only the Inverter located at
each end of the network to ON.
· Master’s program error.
® Check the start of communications
and correct the program.
· Communications circuit damage.
® If the same error is detected as a
result of a self-diagnostic test, change
the Inverter.
Maintenance Operations Chapter 8
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