Danfoss VLT HVAC Design Manual Download Page 192

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ALARM 57, AMA timeout

Try to start the AMA again a number of times, until the AMA is carried
out. Please note that repeated runs may heat the motor to a level where
the resistance Rs and Rr are increased. In most cases, however, this is
not critical.

ALARM 58, AMA internal fault

Contact your Danfoss supplier.

WARNING 59, Current limit

The current is higher than the value in par. 4-18

Current Limit

WARNING 60, External interlock

External interlock has been activated. To resume normal operation, apply
24 V DC to the terminal programmed for external interlock and reset the
frequency converter (via serial communication, digital I/O, or by pressing
reset button on keypad).

WARNING 61, Tracking error

An error has been detected between calculated motor speed and speed
measurement from feedback device. The function for Warning/Alarm/
Disable is set in 4-30,

Motor Feedback Loss Function

, error setting in 4-31,

Motor Feedback Speed Error

, and the allowed error time in 4-32,

Motor

Feedback Loss Timeout

. During a commissioning procedure the function

may be effective.

WARNING 62, Output frequency at maximum limit

The output frequency is higher than the value set in par. 4-19

Max Output

Frequency

WARNING 64, Voltage limit

The load and speed combination demands a motor voltage higher than
the actual DC link voltage.

WARNING/ALARM/TRIP 65, Control card over temperature

Control card over temperature: The cutout temperature of the control
card is 80

WARNING 66, Heatsink temperature low

This warning is based on the temperature sensor in the IGBT module.

Troubleshooting:

The heatsink temperature measured as 0° C could indicate that the tem-
perature sensor is defective causing the fan speed to increase to the
maximum. If the sensor wire between the IGBT and the gate drive card
is disconnected, this warning would result. Also, check the IGBT thermal
sensor.

ALARM 67, Option module configuration has changed

One or more options have either been added or removed since the last
power-down.

ALARM 68, Safe stop activated

Safe stop has been activated. To resume normal operation, apply 24 V
DC to terminal 37, then send a reset signal (via Bus, Digital I/O, or by
pressing the reset key. See par. .

ALARM 69, Power card temperature

The temperature sensor on the power card is either too hot or too cold.

Troubleshooting:

Check the operation of the door fans.

Check that the filters for the door fans are not blocked.

Check that the gland plate is properly installed on IP 21 and IP
54 (NEMA 1 and NEMA 12) drives.

ALARM 70, Illegal FC Configuration

Actual combination of control board and power board is illegal.

WARNING/ALARM 71, PTC 1 safe stop

Safe Stop has been activated from the MCB 112 PTC Thermistor Card
(motor too warm). Normal operation can be resumed when the MCB 112
applies 24 V DC to T-37 again (when the motor temperature reaches an
acceptable level) and when the Digital Input from the MCB 112 is deac-
tivated. When that happens, a reset signal must be is be sent (via serial
communication, digital I/O, or by pressing reset button on keypad). Note
that if automatic restart is enabled, the motor may start when the fault
is cleared.

ALARM 72, Dangerous failure

Safe stop with trip lock. Unexpected signal levels on safe stop and digital
input from the MCB 112 PTC thermistor card.

Warning 76, Power Unit Setup

The required number of power units does not match the detected number
of active power units.

Troubleshooting:

When replacing an F-frame module, this will occur if the power specific
data in the module power card does not match the rest of the drive.
Please confirm the spare part and its power card are the correct part
number.

WARNING 73, Safe stop auto restart

Safe stopped. Note that with automatic restart enabled, the motor may
start when the fault is cleared.

WARNING 77, Reduced power mode:

This warning indicates that the drive is operating in reduced power mode
(i.e. less than the allowed number of inverter sections). This warning will
be generated on power cycle when the drive is set to run with fewer
inverters and will remain on.

ALARM 79, Illegal power section configuration

The scaling card is the incorrect t number or not installed. Also MK102
connector on the power card could not be installed.

ALARM 80, Drive initialized to default value

Parameter settings are initialized to default settings after a manual reset.

ALARM 91, Analog input 54 wrong settings

Switch S202 has to be set in position OFF (voltage input) when a KTY
sensor is connected to analog input terminal 54.

ALARM 92, No flow

A no-load situation has been detected in the system. See parameter
group 22-2.

ALARM 93, Dry pump

A no-flow situation and high speed indicates that the pump has run dry.
See parameter group 22-2.

ALARM 94, End of curve

Feedback stays lower than the set point which may indicate leakage in
the pipe system. See parameter group 22-5.