77
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
Section 1Section 1Section 1Section 1Section 1
Section 2Section 2Section 2Section 2Section 2
Section 3Section 3Section 3Section 3Section 3
Section 4Section 4Section 4Section 4Section 4
Reset messages
Reset messages appear in the 2nd line of the display
and alarm messages appear in the 3rd line of the dis-
play - see the example below:
Automatic restart (RESTART):
When "automatic reset" has been selected as the
reset function, the message indicates that VLT 3500
HVAC is trying to restart automatically after having
tripped. The time delay before the restart depends on
parameter 312.
Trip (TRIP):
VLT 3500 HVAC has tripped and manual reseting is
required. Manual resetting can be carried out by
means of the reset key on the keyboard, a digal input
(terminal 16, 17 or 27) or bit 07 of the control word
(RS 485).
Trip locked (TRIP LOCKED):
VLT 3500 HVAC has tripped and resetting is only
possible if the mains supply is cut out. Having cut the
mains supply back in, manual resetting is required.
Overtemperature (OVER TEMP):
Error code 6
An excessive temperature has been measured
internally in VLT 3500 HVAC. A cooling-down period is
required before resetting is possible. (Trip locked).
Inverter overloaded (OVERLOAD):
Error code 7
The electronic thermal inverter protection reports that
VLT 3500 HVAC has tripped because of overload (too
high current for too long). The counter for electronic
thermal inverter protection has reached 100%.
Motor overloaded (MOTOR TRIP):
Error codes 8 and 15
According to the electronic thermal motor protection,
the motor is too hot. The alarm only comes up if "trip"
has been selected in parameter 315. See also para-
meter 400.
Inverter fault (INVERT FAULT):
Error code 1
There is a fault in the power side of VLT 3500 HVAC.
Please contact DANFOSS.
Alarm messages
Undervoltage (UNDER VOLTAGE):
Error code 3
The intermediate circuit voltage is below the under-
voltage limit of the inverter.
Overvoltage (OVER VOLTAGE):
Error code 2
The intermediate circuit voltage is above the overvolt-
age limit of the inverter.
Current limit (CURRENT LIMIT):
Error code 9
The motor current has exceeded the value of para-
meter 209 for a longer time than that permitted in pa-
rameter 310.
Overcurrent (OVER CURRENT):
Error code 4
The peak current limit of the inverter (approx. 250%
of the rated current) has been exceeded for more
than 7-11 secs. (Trip locked).
Ground fault (GROUND FAULT):
Error code 5
There is a discharge from the output phases to
ground, either in the cable between the frequency
converter and the motor, or from inside the motor.
(Trip locked).
■
■
ALARM
TRIP
UNDER VOLTAGE
Voltage limits:
VLT 3500 range
3x200/230 V
3x380/415 V
3x440/500 V
VLT 3575-3800
[VDC]
[VDC]
[VDC]
[VDC]
Undervoltage
210
400
460
470
Voltage warning, low
235
440
510
480
Voltage warning, high
370
665
800
790
Overvoltage
410
730
880
850
The voltage is the intermediate circuit voltage of the frequency converter. The corresponding mains voltage is the
intermediate circuit voltage divided by
√
2.
4.3 Alarm messages
