76
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
4.2 W
a
rnings
Warnings
Warnings appear in line 3 of the display - see example
below:
Voltage warning, low (VOLTAGE LOW):
The intermediate circuit voltage (DC) is below the
warning limit of the control card, see table page 77.
The inverter is still active.
Voltage warning, high (VOLTAGE HIGH):
The intermediate circuit voltage (DC) is above the
warning limit of the control card, see table page 77.
The inverter is still active.
Undervoltage (UNDER VOLTAGE):
The intermediate circuit voltage is below the under-
voltage limit of the inverter, see table page 77. The
inverter has stopped and a trip will occur when the
delay time selected in parameter 311 has passed.
Overvoltage (OVER VOLTAGE):
The intermediate circuit voltage is above the overvolt-
age limit of the inverter, see table page 77. The
inverter has stopped and a trip will occur when the
delay time selected in parameter 311 has passed.
Current limit (CURRENT LIMIT):
The motor current is higher than the value stated in
parameter 209.
Overcurrent (OVER CURRENT):
The peak current limit of the inverter (approx. 250%
of the rated current) has been exceeded; after 7-11
secs. a trip will occur.
Reference fault (REF FAULT):
There is a fault on an analogue input signal (terminal
53 or 60), when a signal type with "live zero" has
been chosen (4-20 mA, 1-5 V or 2-10 V). The
warning is activated when the signal level is less than
half the zero level (4 mA, 1 V or 2 V).
FREQUENCY
VOLTAGE LOW
50.0Hz
■
Motor overloaded (MOTOR TIME):
According to the electronic thermal motor protection,
the motor is too hot. This warning only comes up if
"warning" has been selected in parameter 315.
Inverter overloaded (INVERT TIME):
According to the electronic inverter protection, the
frequency converter is close to tripping because of
overload (too high current for too long a time). The
counter for electronic inverter protection has
readed98% (100% results in a trip).
24 V fault (NO 24 VOLT):
The 24 V voltage supply from the power unit to the
control card is not present.
EEPROM fault (EEPROM ERROR):
EEPROM fault. Data changes are not saved when the
mains supply is cut out.
Lost motor (STALLING):
No motor (NO MOTOR):
The motor check function (par. 313) detects that a
motor has not been connected to the frequency con-
verter output.
Frequency warning, low (LO FREQ WARN):
The output frequency is lower than the value selected
in parameter 210.
Frequency warning, high (HI FREQ WARN):
The output frequency is higher than the value
selected in parameter 211.
Current warning, low (LO CURR WARN):
The output current is lower than the value selected in
parameter 212.
Current warning, high (HI CURR WARN):
The output current is higher than the value selected in
parameter 213.
