Chapter V Basic Operation Instructions
149
Fault
code
Fault type
Possible cause of
failure
Countermeasures
detection time
E022
Reserved
-
-
E023
Water
shortage
alarm
Abnormal water
pressure/water level
Check whether the water pressure at the
pump inlet is abnormal.
Broken line or poor
contact of the sensor,
system has no feedback
signal
Check the sensor installation and wiring.
Too high water shortage
alarm value.
Modify the F8.32 setting.
Too short water shortage
detection time
Modify the F8.33 setting.
E024
Reserved
-
-
E025
Reserved
-
-
E026
Abnormal
buffer
circuit
Extremely low power
grid voltage
Check the power grid voltage
Damaged thyristor
Replace the main circuit contactor and
seek for service
Damaged
power-on
buffer resistance
Replace buffer resistance and seek for
service
Damaged control circuit Seek for service.
Input phase loss
Check the input R, S, T wiring