VD520 Series Inverter User Manual Fault Shooting and Solutions
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Err.20
Motor
self-learning
abnormal
1. The motor parameters not
set according to the
nameplate
2. The parameter
identification process
timeout
1. Correctly set motor parameters
according to the nameplate
2. Check the inverter to motor lead
Err.21
EEPROM
write-read
abnormal
1. EEPROM chip damage
1. Replace main control board
Err.22
Disconnection
detection fault
1. Output disconnection
2. The upper limit frequency
setting is too small of A0-21
setting time is too short
3. When do not need to
disconnection detection,
A0-21 set nonzero value,
and the actural output
frequency reaches the upper
limit frequency
1. Rewing
2. The upper limit frequency
applification or A0-21 set reasonable
value
3. Set A0-21 to zero
Err.23
PID feedback
loss when
running
1. PID feedback less than
FA-26 set value
1. Check the PID feedback signal or
set the FA-26 to an appropriate value
Err.24
Motor short
circuit to
ground
1. Motor short circuit to
ground
1. Replace the cable or motor
Err.27
Running time
reached
1. Accumulative running
time reach to set value
1. Using parameter initialization
function to clear the record
information
Err.28
Power on time
reached
1. Accumulative power on
time reach to set value
1. Using parameter initialization
function to clear the record
information
Err.29
Buffer
contactor
overheating
1. Power grid voltage
fluction range is too large,
cause the inverter
repeatedly up and down,
buffer contactor overheating
1. Adding input reactor and other
measures to ensure the stability of
input voltage
Err.35
User
self-define fault
1
1. Through the multi-function
terminal DI input the signal
of user-defined fault 1
2. Through the virtual IO
function input the signal of
user-defined fault 1
1. Reset running
2. Reset running
Err.36
User
self-define fault
2
1. Through the multi-function
terminal DI input the signal
of user-defined fault 2
2. Through the virtual IO
function input the signal of
user-defined fault 2
1. Reset running
2. Reset running
