Unitronics UMI-B1 UL Series Operation Manual page 109

UMI-B1 UL Series Inverter
Fault
Fault type
code
Keypad
PCE communication
Parameter upload
UPE
Parameter
DNE
download error
Grounding
ETH1
shortcut fault 1
Grounding
ETH2
shortcut fault 2
Electronic
LL
underload fault
Possible cause
The keypad is not in good
connection or offline;
The keypad cable is too
long and there is strong
interference;
error Part of the
communication circuits of
the keypad or main board
have fault.
The keypad is not in good
connection or offline;
The keypad cable is too
long and there is strong
interference;
error
Part of the
communication circuits of
the keypad or main board
have fault.
The keypad is not in good
connection or offline;
The keypad cable is too
long and there is strong
interference;
Data storage error in
keypad
1. The output of the
inverter is short circuited
with the ground
2. There is fault in the
current detection circuit
3. There is a great
difference between the
actual motorpower
setting and the inverter
power
The inverter will report
the underload pre-alarm
according to the set
value.
107
Fault tracking
Solutions
Check the keypad cable
and and ensure it is
normal;
Check the environment
and eliminate the
interference source;
Change hardware and
ask for maintenance
service.
Check the environment
and eliminate
interference source;
Change hardware
ask for maintenance
service;
Change hardware
ask for maintenance
service.
Check the environment
and eliminate
interference source;
Change hardware
ask for maintenance
service;
Backup data in
keypad again
1. Check if the connection
of the motor is normal or
not
2. Change the hoare
3. Change the main
control panel
4. Reset the correctmotor
parameter
Check the load and the
underload pre-alarm
point.
the
and
and
the
and
the