Munters HCUw - Page 82

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3G3JV Maintenance Operations Chapter7
7
Fault display Warning name and Meaning Probable cause and remedy
EF
(flashing)
Forward- and reverse-rotation input
(EF)
The forward and reverse commands
are input to the control circuit terminals
simultaneously for 0.5 s or more.
Note The Inverter stops according to
the method set in n04.
• A sequence error has occurred.
-> Check and adjust the local or remote
selection sequence.
Emergency stop (STP)
The Digital Operator stops operating.
The STOP/RESET Key on the Digital
Operator is pressed while the Inverter
is operating according to the forward
or reverse command through the
control circuit terminals.
Note The Inverter stops according to
t
h
e
m
et
h
od
set
in n
0
4
.
• The parameter setting was incorrect.
~ Turn off the forward or reverse command
once, check that the n06 parameter setting for
STOP/RESET Key function selection, and
restart the Inverter.
STP
(flashing)
The emergency stop alarm signal is
input as multi-function input.
A multi-function input 1, 2, 3, or 4 set
to 20 or 22 has been used.
Note The Inverter stops according to
the method set in n04.
• An emergency stop alarm is input to a multi-func-
tion input.
-> Remove the cause of the fault.
• The sequence is incorrect.
~ Check and change the external fault input
sequence including the input timing and NO
or NC contact.
FRn
(flashing)
Cooling fan fault (FAN)
The cooling fan has been locked.
• The cooling fan wiring has a fault.
~ Turn off the Inverter, dismount the fan, and
check and repair the wiring.
• The cooling fan in not in good condition.
~ Check and remove the foreign material or
dust on the fan.
• The cooling fan is beyond repair.
-> Replace the fan.