ALARM 15
In-complete hardware:
A fitted option is not handled by the present
control board (hardware or software).
ALARM 16
Short-circuit:
There is short-circuiting in the motor or on the
motor terminals.
Turn off the frequency converter and remove
the short-circuit.
WARNING/ALARM 17
Control word timeout:
There is no communication to the frequency
converter.
The warning will only be active when par. 8-04
is NOT set to
OFF
.
If par. 8-04 is set to
Stop
and
Trip
, a warning
appears and the frequency converter ramps
down to zero speed, while giving an alarm.
Par. 8-03
Control Word Timeout Time
could
possibly be increased.
WARNING 25
Brake resistor short-circuited:
The brake resistor is monitored during opera-
tion. If it short-circuits, the brake function is
disconnected and the warning appears. The
frequency converter still works, but without
the brake function. Turn off the frequency
converter and replace the brake resistor (see
par. 2-15
Brake Check
).
ALARM/WARNING 26
Brake resistor power limit:
The power transmitted to the brake resistor is
calculated as a percentage, as a mean value
over the last 120 s, on the basis of the resist-
ance value of the brake resistor (par. 2-11)
and the intermediate circuit voltage. The
warning is active when the dissipated braking
power is higher than 90%. If
Trip
[2] has been
selected in par. 2-13, the frequency converter
cuts out and issues this alarm, when the dis-
sipated braking power is higher than 100%.
WARNING/ALARM 27
Brake chopper fault:
The brake transistor is monitored during op-
eration and if it short-circuits, the brake func-
tion disconnects and the warning comes up.
The frequency converter is still able to run, but
since the brake transistor has short-circuited,
substantial power is transmitted to the brake
resistor, even if it is inactive.
Turn off the frequency converter and remove
the brake resistor.
Warning: There is a risk of substantial power being transmitted to the brake resistor
if the brake transistor is short-circuited.
ALARM/WARNING 28
Brake check failed:
Brake resistor fault: the brake resistor is not
connected/working.
WARNING/ALARM 29
Drive over temperature:
If the enclosure is IP 20 or IP 21/TYPE 1, the
cut-out temperature of the heat-sink is 95
o
C +5
o
C. The temperature fault cannot be re-
set, until the temperature of the heatsink is
below 70
o
C.
The fault could be:
-
Ambient temperature too high
-
Too long motor cable
ALARM 30
Motor phase U missing:
Motor phase U between the frequency con-
verter and the motor is missing.
Turn off the frequency converter and check
motor phase U.
ALARM 31
Motor phase V missing:
Motor phase V between the frequency con-
verter and the motor is missing.
Turn off the frequency converter and check
motor phase V.
ALARM 32
Motor phase W missing:
Motor phase W between the frequency con-
verter and the motor is missing.
Turn off the frequency converter and check
motor phase W.
VLT
®
HVAC Drive Design Guide
8. Troubleshooting
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
157
8
Содержание VLT series
Страница 78: ...4 How to Order VLT HVAC Drive Design Guide 78 MG 11 B2 02 VLT is a registered Danfoss trademark 4...
Страница 120: ...7 RS 485 Installation and Set up VLT HVAC Drive Design Guide 120 MG 11 B2 02 VLT is a registered Danfoss trademark 7...
Страница 152: ...8 Troubleshooting VLT HVAC Drive Design Guide 152 MG 11 B2 02 VLT is a registered Danfoss trademark 8...