9-4
Table 9-2(c)
Troubleshooting
Alarm
code
Description Probable
cause
Remedy
E105
E205
No.1 flow switch failure
No.2 flow switch failure
The flow switch is broken or its wiring is
disconnected.
Or, the flow switch is not working properly
because of contamination with foreign
matter or other causes.
It is necessary to check and/or replace the flow
switch. Contact us or the service company.
An overload has occurred because the
unit is running at a flow rate outside the
specified range.
Adjust the load so that it falls within the
specified range.
An overcurrent has occurred because of
damage to the bearings.
It is necessary to replace the bearings. Contact
us or the service company.
An overcurrent has occurred because
foreign matter is caught in the pump.
It is necessary to disassemble and inspect the
pump. Contact us or the service provider.
A drop in power voltage or an imbalance
between phases has led to an increase in
the electric current value.
Check for any insufficient power capacity or
any imbalance between phases, and fix the
problem.
E111
E211
E114
E214
E115
E215
No.1 overcurrent
No.2 overcurrent
No.1 anti-stall
No.2 anti-stall
No.1 inverter overload
No.2 inverter overload
A failure in the motor has led to an
overcurrent flow.
It is necessary to check and/or replace the
motor. Contact us or the service company.
E112
E212
No.1 overvoltage
No.2 overvoltage
The power voltage is too high.
Check the power voltage.
E116
E216
No.1 open-phase
output
No.2 open-phase
output
The motor has burned out.
It is necessary to check and/or replace the
motor. Contact us or the service company.
The ambient temperature is too high.
Improve the installation environment.
E117
E217
No.1 inverter overheat
No.2 inverter overheat
The cooling fan is broken.
It is necessary to replace the cooling fan.
Contact us or the service company.
A cause other than electric leak has turned
“off” the ground fault interrupter.
Turn on the ground fault interrupter.
E118
E218
No.1 communication
failure
No.2 communication
failure
The communication connector is coming
off.
Firmly insert the connector.
E119
E219
E120
E220
No.1 inverter trouble 1
No.2 inverter trouble 1
No.1 inverter trouble 2
No.2 inverter trouble 2
The inverter is broken.
It is necessary to check and/or replace the
inverter. Contact us or the service company.
