TECO E510s Series - Page 325

5-6
LED display Description Cause Possible solutions
FBLSS
PID Feedback Signal Loss
 Since proportion of loss pressure
(23-19) is enabled and over high,
the inverter trips to fault. Thus,
feedback sensor cannot operate
properly or is not installed
correctly.
 Check if the proportion of
loss pressure (23-19) is set
correctly.
 Make sure the feedback
sensor is installed correctly
and PID feedback signal
operates normally.
Short Circuit
Inverter output short
circuit or ground fault.
 Short circuit or ground fault
(08-23 = 1).
 Motor damaged (insulation).
 Wire damage or deterioration.
 Check the motor wiring.
 Disconnect motor and try
running inverter.
run
Motor1/Motor2
Switch
Motor1/Motor2 switch
during operation
Input motor 2 switch command
during operation.
Improve the control
sequence, motor can be
switched in stop.
PF
Protection Error
1. OH1/OL2 error occurs
three times in 5
minutes.
2. Digital input or
communication run
command not
removed
Digital input or communication
runcommand not removed.
Remove the digital input or
communication run
command.
LPBFT
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).
OPBFT
High pressure fault
 Since feedback value of pump
pressure is lower than limit of
maximum flow.
 Check feedback signal is
correct.
 Check if feedback value of
pressure is lower than limit
of maximum pressure
(23-12).
TOL
External Overload
(For fire mode only)
 External Overload signal receied
by digital input terminal
 Check the reason for
external overload
 Reset digital input terminal
of external overload
FB(Flash)
PID feedback breaking
 Feedback signal wire broken
 Feedback sensor broken.
 Check feedback wiring
 Replace feedback sensor.