DAYLIFF SUNVERTER B Installation & Operating Manual page 35

Fault
Fault Type
Code
IGBT Phase U
OUt1
Fault
IGBT Phase V
OUt2
Fault
IGBT Phase W
OUt3
Fault
Pump Overload
OL1
OL2 Inverter Overload
Program
Defined
OL3
Overload Alert
Rectifier
OH1
Module
Overheat
OH2 IGBT Overheat
Input Phase
SP1
Loss
Output Phase
SPO
Loss
Braking Unit
bC
Fault
485
CE
Communication
EEPROM R/W
EEP
Fault
Possible Causes
1. Acceleration is too fast
2. The IGBT of corresponding
phase is damaged internally
3. Misoperation caused by
interference
4. Bad connection of driving
wires
1. Input voltage is too low
2. Improper setting of pump
motor rated current
3. Motor is locked-rotor
4. The power of inverter and
pump do not match
5. Acceleration is too fast
Improper parameter settings of
overload alert
1. Air duct is blocked or cooling
fan is damaged
2. Ambient temperature is too
high
3. Connections or plug-ins in
control board loosen
4. Rectifier module or IGBT is
damaged
Phase loss of input R, S, T
1. Phase loss of output U, V, W
2. Three-phase of pump is
seriously unbalanced
1. Braking circuit is faulty or
braking pipeline is damaged
2. External braking resistance is
too small
1. Improper baud rate setting
2. Communication error in serial
communication
3 . L o n g i n t e r r u p t i o n o f
communication
1 . E r r o r o c c u r s w h e n
reading/writing control
parameters
2. EEPROM is damaged
6 32
Solutions
1. Increase acceleration time
2. Contact Dayliff for help
3. Check whether there are strong
interference sources in the peripheral
devices
4. Check the driving wires
1. Check the input power supply
2. Set proper rated current of pump
motor
3. Check the load and adjust the torque
lifting capacity
4. Choose power matching motor and
inverter
5 . I n c r e a s e a c c e l e r a t i o n t i m e
Check parameter settings of overload
alert function
1. Clear air duct or replace cooling fan
2. Lower the ambient temperature
3. Check and reconnect
4 . C o n t a c t D a y l i f f f o r h e l p
1. Check the input power supply
2. Check the installation wiring
1. Check the output wiring
2. Check the pump motor and cables
1. Check the braking unit and replace
the braking pipeline
2. Increase braking resistance
1. Set proper baud rate
2. Press STOP/RESET to reset or
contact the manufacturer for help
3. Check the wiring of communication
interface
1. Set proper baud rate
2. Press STOP/RESET to reset or
contact the manufacturer for help
3. Check the wiring of communication
interface