8 Protective Operations
49
For information on the causes and countermeasures for other faults, refer to the Varispeed
G7/F7 Series Instruction Manual (Manual NO.: TOE-S616-60.1/TOE-S616-55.1).
17H
OL1
Motor overheat
{{
18H
OL2
Inverter overheat
{{
1AH
EF0
External fault detected for communications board other
than SI-K2
{{
1BH
RUNC
Reset during run command input error
{{
1CH
FBL
PID feedback reference lost
{{
1DH
CALL
Communications on standby
{{
1EH
UL3
Undertorque 1
{{
1FH
UL4
Undertorque 2
{{
22H
OH3
Motor overheating 1
{{
23H
EF9
External fault 9
{ ×
24H
EF10
External fault 10
{ ×
25H
EF11
External fault 11
{ ×
26H
EF12
External fault 12
{ ×
Table 11 Inverter Warning Codes (cont’d)
ALARM Operator
Display
Description G7 F7
Table 12 Causes and Countermeasures of Main Faults Displayed on Varispeed G7/F7 Digital Operator
Display Description Cause Countermeasures
BUS Optional communi-
cations error
Communications are not estab-
lished with the host controller.
Check the LED indicators. Check the com-
munications cable wiring.
E5 SI-T WDT error There is no continuity in the WDT
for data sent by the host controller.
Execute DISCONNECT or ALM_CLR, and
then use either the CONNECT or
SYNC_SET command to move to phase 3.
EF0 External fault from
option
An external fault is being input
from the option card.
Turn OFF the faulty input.
CPF06 Optional
Connection fault
The Inverter and communications
option are not properly connected.
Turn OFF the power to the Inverter and
check the connection between the Option
Card and the Inverter. Then turn the power
back ON. If the fault persists, replace the
Option Card.
CPF21 Communications
optional self-diag-
nostic fault
The communications option is
faulty.
Turn OFF and back ON the power to the
Inverter. If the fault persists, replace the
Option Card.
CPF22 Communications
optional model
code fault
CPF23 Communications
optional mutual-
diagnostic fault
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