48
warning 25, Brake resistor short-circuited:
The brake resistor is monitored during operation. If it short-
circuits, the brake function is disconnected and the warning
appears. The inverter still works, but without the brake function.
Turn o the inverter 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 resistance value of the brake resistor (par. 2–11 Brake Resis-
tor (ohm)) 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 Brake Power Monitoring,
the inverter cuts out and issues this alarm, when the dissipated
braking power is higher than 100%.
warning/alarm 27, Brake chopper fault:
The brake transistor is monitored during operation and if it
short-circuits, the brake function disconnects and the warning
comes up. The inverter 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 o the inverter
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 isip00, ip20/Nema1 or ip21/type 1, the cut-out
tem-perature of the heat-sink is 203°f +9°f (95°c +5°c). The
temperature fault cannot be reset, until the temperature of the
heatsink is below 158°f (70°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 converter and the motor
is missing.Turn o the frequency converter and check motor
phase U.
alarm 31, Motor phase V missing:
Motor phase V between the inverter and the motor is missing.
Turn o the inverter and check motor phase V.
alarm 32, Motor phase W missing:
Motor phase W between the inverter and the motor is missing.
Turn o the frequency converter and check motor phase W.
alarm 33, Inrush fault:
Too many power ups have occured within a short time period.
warning/alarm 34, Fieldbus
communication fault:
The fieldbus on the communication option card is not working.
warning/alarm 36, Mains failure:
This warning/alarm is only active if the supply voltage to the
inverter is lost and par. 14–10 Mains Failure is not set to o.
Possible correction: check the fuses to the frequency converter
warning/alarm 37, Phase Imbalance:
There is a current imbalance between the power units.
alarm 38, Internal fault:
Contact your local Armstrong supplier.
alarm 39, Heatsink Sensor:
No feedback from the heatsink sensor.
warn ing 40, Overload of Digital Output Terminal 27:
Check the load connected to terminal 27 or remove short-circuit
connection. Check par. 5–00 Digital i/o Mode and par. 5–01
Terminal 27 Mode.
warning 41, Overload of Digital Output
Terminal 29:
Check the load connected to terminal 29 or remove short-circuit
connection. Check par. 5–00 Digital i/o Mode and par. 5–02
Terminal 29 Mode.
warning 42, Overload of Digital Output On x30/6 :
Check the load connected to x30/6 or remove short-circuit
connection. Check par. 5–32 Term X30/6 Digi Out (mcb 101).
warning 42, Overload of Digital Output On x30/7 :
Check the load connected to x30/7 or remove short-circuit con-
nection. Check par. 5–33 Term x30/7 Digi Out (mcb 101).
alarm 46, Pwr. card supply:
The supply on the power card is out of range.
warning 47, 24 v supply low:
The external 24 v dc backup power supply may be overloaded,
otherwise contact your Armstrong supplier.
al ar m 48, 1.8 v supply low:
Contact your Armstrong supplier.
warning 49, Speed limit:
The speed has been limited by range in par. 4–11 Motor Speed
Low Limit [rpm] and par. 4–13 Motor Speed High Limit [rpm].
alarm 50, ama calibration failed:
Contact your Armstrong supplier.
al arm 51, ama check Unom and Inom:
The setting of motor voltage, motor current, and motor power is
presumably wrong. Check the settings.
al ar m 52, ama low Inom:
The motor current is too low. Check the settings.
al ar m 53, ama motor too big:
The motor is too big for the ama to be carried out.
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