The alarm words, warning words and extended status
words can be read out via a serial bus or optional fieldbus
for diagnostics. See also
parameter 16-94 Ext. Status Word
.
WARNING 1, 10 Volts low
The control card voltage is less than 10 V from terminal 50.
Remove some of the load from terminal 50, as the 10 V
supply is overloaded. Maximum 15 mA or minimum 590
Ω
.
A short circuit in a connected potentiometer or incorrect
wiring of the potentiometer can cause this condition.
Troubleshooting
•
Remove the wiring from terminal 50. If the
warning clears, the problem is with the wiring. If
the warning does not clear, replace the control
card.
WARNING/ALARM 2, Live zero error
This warning or alarm only appears if it is programmed in
parameter 6-01 Live Zero Timeout Function
. The signal on 1
of the analog inputs is less than 50% of the minimum
value programmed for that input. Broken wiring or a faulty
device sending the signal can cause this condition.
Troubleshooting
•
Check the connections on all the analog mains
terminals:
-
Control card terminals 53 and 54 for
signals, terminal 55 common.
-
VLT
®
General Purpose I/O MCB 101
option terminals 11 and 12 for signals,
terminal 10 common.
-
VLT
®
Analog I/O MCB 109 option
terminals 1, 3, and 5 for signals,
terminals 2, 4, and 6 common.
•
Check that the drive system’s programming and
switch settings match the analog signal type.
•
Perform an input terminal signal test.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the drive
system.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the mains
voltage imbalance is too high. This message also appears
for a fault in the input rectifier on the drive system.
Options are programmed in
parameter 14-12 Function at
Mains Imbalance
.
Troubleshooting
•
Check the supply voltage and supply currents to
the drive system.
WARNING 5, DC link voltage high
The DC-link voltage (DC) is higher than the high-voltage
warning limit. The limit depends on the drive system’s
voltage rating. The unit is still active.
WARNING 6, DC link voltage low
The DC-link voltage (DC) is lower than the low-voltage
warning limit. The limit depends on the drive system’s
voltage rating. The unit is still active.
WARNING/ALARM 7, DC overvoltage
If the voltage in the intermediate circuit exceeds the limit,
the drive system trips after a time.
Troubleshooting
•
Extend the ramp time.
•
Change the ramp type.
•
Increase
parameter 14-26 Trip Delay at Inverter
Fault
.
•
Check that the supply voltage matches the
voltage at the drive system.
•
Perform an input voltage test.
WARNING/ALARM 8, DC under voltage
If the voltage in the intermediate circuit (DC-link) drops
below the undervoltage limit, the drive system checks if a
24 V DC back-up power supply is connected. If a 24 V DC
back-up power supply is not connected, the drive system
trips after a fixed time delay. The time delay varies with
the size of the drive system.
Troubleshooting
•
Check that the supply voltage matches the
voltage at the drive system.
•
Perform an input voltage test.
•
Perform a soft charge circuit test.
•
Check if the DC fans are not running. DC fans are
designed to run for only a short time when
powered on into standby mode.
WARNING/ALARM 9, Inverter overload
The drive system has run with more than 100% overload
for too long and is about to cut out. The counter for
electronic thermal inverter protection issues a warning at
98% and trips at 100%, while giving an alarm. The drive
system cannot be reset until the counter is again below
90%.
Troubleshooting
•
Compare the output current shown on the LCP
with the drive system’s rated current.
•
Compare the output current shown on the LCP
with the measured motor current.
•
Show the thermal load of the drive system on the
LCP and monitor the value. When running above
the drive system’s continuous current rating, the
counter increases. When running below the
continuous current rating, the counter decreases.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the frequency converter
issues a warning or an alarm when the counter is >90% if
parameter 1-90 Motor Thermal Protection
is set to warning
Maintenance, Diagnostics, a...
VLT
®
Parallel Drive Modules
40
Danfoss A/S © 08/2017 All rights reserved.
MG37L202
6
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