Fault Shooting and Solutions VD120 Series Inverter User Manual
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156
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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
Disconnectio
n 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. One phase (U, V, W) 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
Summary of Contents for VD120 Series
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