Munters HCUw, Эксплуатация и техническое обслуживание

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51
3G3JV Maintenance Operations
Chapter7
7
7-1-2 Warning Detection (Nonfatal Error)
The warning detection is a type of Inverter protective function that does not operate
the fault contact output and returns the Inverter to its original status once the
cause of the error has been removed. The Digital Operator flashes and display the
detail of the error. If a warning occurs, take appropriate countermeasures
according to the table below.
Note Some warnings or some cases stop the operation of the Inverter as described in
the table.
„
W a r n i n g D i s p l a y s a n d P r o c e s s i n g
Fault display Warning name and Meaning Probable cause and remedy
Uu
(flashing) Main Circuit Undervoltage (UV)
The main circuit DC voltage has
reached the undervoltage detection
level (200 V DC for the
3G3JV-A2
X
-A,
160 V DC for the
3G3JV-AB
X
-A,
and
400 V DC for the
3G3JV-A4
X
-A).
•
Power supply to the Inverter has phase loss,
power input terminal screws are loose, or the
power line is disconnected.
~
Check the above and take necessary
countermeasures.
•
Incorrect power supply voltage
~
Make sure that the power supply voltage is
within specifications.
ou
(flashing)
Main Circuit Overvoltage
The main circuit DC voltage has
reached the
overvoltage
detection
level (200-V models: 410 V DC min.;
400-V models: 820 V DC min.).
•
The power supply voltage is too high.
~
Decrease the voltage so it will be within
specifications.
oH
(flashing)
Radiation fin overheated (OH)
The temperature of the radiation fins
of the Inverter has reached
110
°
C ±
10
°
C.
•
The ambient temperature is too high.
~
Ventilate the Inverter or install a cooling unit.
oL3
(flashing) Overtorque detection
(OL3)
There has been a current or torque the
same as or greater than the setting in
n60 for overtorque detection level and
that in n61 for overtorque detection
time. A fault has been detected with
n59 for overtorque detection function
selection set to 1 or 3
•
The mechanical system is locked or has a failure.
~
Check the mechanical system and correct the
cause of overtorque.
•
The parameter settings were incorrect.
->
Adjust the n60 and n61 parameters according
to the mechanical system.
Increase the set values in n60 and n61.
SEr
(flashing) Sequence error (SER)
A sequence change has been input
while the Inverter is in operation.
Local or remote selection is input while
the Inverter is in operation.
Note The Inverter coasts to a stop.
•
A sequence error has occurred.
~
Check and adjust the local or remote
selection sequence as multi-function input.
bb
(flashing)
External base block (bb)
The external base block command has
been input.
Note The Inverter coasts to a stop.
•
The external base block command has been in-
put as multi-function input.
->
Remove the cause of external base block
input.
•
The sequence is incorrect.
~
Check and change the external fault input
sequence including the input timing and NO
or NC contact.