ALARM 15, Hardware mismatch
A fitted option is not operational with the present control
board hardware or software.
Record the value of the following parameters and contact
the Danfoss supplier:
•
15-40 FC Type
•
15-41 Power Section
•
15-42 Voltage
•
15-43 Software Version
•
15-45 Actual Typecode String
•
15-49 SW ID Control Card
•
15-50 SW ID Power Card
•
15-60 Option Mounted
•
15-61 Option SW Version
(for each option slot)
ALARM 16, Short-circuit
There is short-circuiting in the motor or motor wiring.
Remove power to the adjustable frequency drive and
repair the short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the adjustable frequency
drive.
The warning will only be active when
8-04 Control Word
Timeout Function
is NOT set to OFF.
If
8-04 Control Word Timeout Function
is set to
Stop
and
Trip
, a warning appears and the adjustable frequency drive
ramps down until it trips then displays an alarm.
Troubleshooting:
•
Check connections on the serial communication
cable
•
Increase
8-03 Control Word Timeout Time
•
Check the operation of the communication
equipment
•
Verify a proper installation based on EMC
requirements
WARNING 23, Internal fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in
14-53 Fan Monitor
(
[0] Disabled
).
Troubleshooting
•
Check fan resistance
•
Check soft charge fuses
WARNING 24, External fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in
14-53 Fan Monitor
(
[0] Disabled
).
Troubleshooting
•
Check fan resistance.
•
Check soft charge fuses.
WARNING 25, Brake resistor short-circuit
The brake resistor is monitored during operation. If a short
circuit occurs, the brake function is disabled and the
warning appears. The adjustable frequency drive is still
operational but without the brake function. Remove power
to the adjustable frequency drive and replace the brake
resistor (see
2-15 Brake Check
).
WARNING/ALARM 26, Brake resistor power limit
The power transmitted to the brake resistor is calculated as
a mean value over the last 120 s of run time. The
calculation is based on the intermediate circuit voltage and
the brake resistance value set in
2-16 AC Brake Max.
Current
. The warning is active when the dissipated braking
is higher than 90% of the brake resistance power. If
[2] Trip
is selected in
2-13 Brake Power Monitoring
, the adjustable
frequency drive will trip when the dissipated braking
energy reaches 100%.
WARNING
There is a risk of substantial power being transmitted to
the brake resistor if the brake transistor is short-circuited.
WARNING/ALARM 27, Brake chopper fault
The brake transistor is monitored during operation and if a
short circuit occurs, the brake function is disabled and a
warning is issued. The adjustable frequency drive is still
operational but, since the brake transistor has short-
circuited, substantial power is transmitted to the brake
resistor, even if it is inactive.
Remove power to the adjustable frequency drive and
remove the brake resistor.
This alarm/warning could also occur should the brake
resistor overheat. Terminals 104 and 106 are available as
brake resistors Klixon inputs.
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
Check
2-15 Brake Check
.
ALARM 29, Heatsink temp
The maximum temperature of the heatsink has been
exceeded. The temperature fault will not reset until the
temperature falls below a defined heatsink temperature.
The trip and reset points are different based on the
adjustable frequency drive power size.
Warnings and Alarms
VLT
®
Refrigeration Drive Instruction Manual
8-8
MG16J122 - VLT
®
is a registered Danfoss trademark
8
8
