TECO F510 series - Page 473

10-4
LED display Description Cause Possible solutions
EF1
External fault
(S1)
External fault (Terminal S1)
Active when 03-00= 25 or 68,
and Inverter external fault
selection 08-24=0 or 1.
 Multifunction digital input external
fault active.
 Multi-function input function
set incorrectly.
 Check wiring
EF2
External fault
(S2)
External fault (Terminal S2)
Active when 03-01= 25 or 68,
and Inverter external fault
selection 08-24=0 or 1.
EF3
External fault
(S3)
External fault (Terminal S3)
Active when 03-02= 25 or 68,
and Inverter external fault
selection 08-24=0 or 1.
EF4
External fault
(S4)
External fault (Terminal S4)
Active when 03-03= 25 or 68,
and Inverter external fault
selection 08-24=0 or 1.
EF5
External fault
(S5)
External fault (Terminal S5)
Active when 03-04= 25 or 68,
and Inverter external fault
selection 08-24=0 or 1.
EF6
External fault
(S6)
External fault (Terminal S6)
Active when 03-05= 25 or 68,
and Inverter external fault
selection 08-24=0 or 1.
CF07
Motor control
fault
Motor control fault
 SLV mode is unable to run motor.
 Perform rotational or
stationary auto-tune
 Increase minimum output
frequency (01-08)
CF08
Motor control
fault
Motor control fault
 Start or Run fault in PMSLV mode.
 Increase the value of 22-10
properly.
 Re auto-tune (22-21)
 Check if the load is too heavy
to raise torque output limit.
FU
fuse open
DC bus fuse blown
DC fuse (Models 230V
50HP and above, 460V
75HP and above) open
circuit.
 IGBT damaged.
 Short circuit output terminals.
 Check IGBTs
 Check for short circuit at
inverter output.
 Replace inverter.
LOPBT
Low flow fault
Low flow fault
 The feedback signal is not
connected.
 Due to HVAC feedback value is
lower than the limit of minimum
flow.

Check feedback signal is
correct and with right
connection.
 Ensure that the feedback
value is higher than the limit
of minimum flow
(
23-51
)
.
HIPBT
High flow fault
High flow fault
 Since HVAC feedback value is
higher than the limit of maximum
flow.

Check feedback signal is
correct.
 Ensure that the feedback
value is lower than the limit
of maximum flow
(
23-48
)
.
LPBFT
Low pressure
fault
Low pressure fault
 The feedback signal is not
connected.
 Since feedback value of pump
pressure is lower than limit of
minimum flow.
 Check feedback signal is
correct and with connection.
 Check if feedback value of
pressure is lower than limit of
minimum pressure (23-15).