RS−P Solar Water Pump Controller User Manual
24
Appendix I
．
Fault and Fault Information List
Appendix I
．
Fault and Fault Information List
controller is equipped with complete protection functions to provide efficient protection while utilizing its
performance sufficiently. Some failure instructions may be displayed during operation. Compare the
instructions with the following table and analyze, decide the causes and solve failures.
For damages on units or questions that can
’
t be resolved, please contact with local distributors/agents,
service centers or manufacturer for solutions.
No.
Failure
code
Failure
description
Potential causes
Solutions
1
E.oc1
Over current
protection
when
acceleration
operation
Low grid voltage
Check proper input voltage and power
supply
Startup too fast during motor operation
Restart after the motor stops rotating
Rotating inertial of load is very large and
shock load is very heavy
Increase the acceleration time and reduce
the occurrences of sudden change of load
Improper setting of motor parameters
select proper power or controller
Set start-up frequency too high
Decrease start-up frequency
Acceleration time is too short
Prolong acceleration time
Set V/F curve ratio too large
Adjust V/F curve setting and torque boost
Power level of controller is small
Replace with controller with proper model
2
E.oc2
Over current
protection
when
deceleration
operation
Low grid voltage
Check proper input voltage and power
supply
Too big rotating inertial of load
Choose appropriate energy braking
components
Improper setting of motor parameters
select proper power or controller
Deceleration time is too short
Prolong deceleration time
Power level of controller is small
Replace with controller with proper model
3
E.oc3
Over current
protection
when
operation with
constant
Sudden change of load during operation
Decrease load
’
s abrupt frequency change
and amplitude
Improper setting of motor parameters
select proper power or controller
Power level of controller is small
Replace with controller with proper model
4
E.oV1
Over voltage
protection
when
acceleration
operation
Motor short to ground
Check motor wiring
Abnormal input power supply voltage
Check input power supply
Fast start-up again when motor operates
with high speed
Start again after the motor stops rotating
5
E.oV2
Over voltage
protection
when
deceleration
operation
Motor short to ground
Check motor wiring
Too big rotating inertial of load
Choose appropriate energy braking
components
Deceleration time is too short
Prolong deceleration time
6
E.oV3
Over voltage
protection
when
operation with
constant
speed
Motor short to ground
Check motor wiring
Abnormal input power supply
Check input power supply and voltage
Too big rotating inertial of load
Choose appropriate energy braking
components
7
E.PCU
Interference
protection
Severely Interfered by exterior signal
Ask professional technicians to maintain
