Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 73

Diagnostics and Troubleshoo...
WARNING 49, Speed limit
When the speed is outside of the specified range in
parameter 4-11 Motor Speed Low Limit [RPM] and
parameter 4-13 Motor Speed High Limit [RPM], the
adjustable frequency drive shows a warning. When the
speed is below the specified limit in parameter 1-86 Trip
Speed Low [RPM] (except when starting or stopping), the
adjustable frequency drive trips.
ALARM 50, AMA calibration failed
Contact the Danfoss supplier or Danfoss Service.
ALARM 51, AMA check U
nom
The settings for motor voltage, motor current and motor
power are wrong. Check the settings in parameters 1-20 to
1-25.
ALARM 52, AMA low I
nom
The motor current is too low. Check the settings in
parameter 4-18 Current Limit.
ALARM 53, AMA motor too big
The motor is too big for the AMA to operate.
ALARM 54, AMA motor too small
The motor is too small for the AMA to operate.
ALARM 55, AMA parameter out of range
The parameter values of the motor are outside of the
acceptable range. AMA cannot run.
ALARM 56, AMA interrupted by user
The user has interrupted AMA.
ALARM 57, AMA internal fault
Try to restart AMA again a number of times until the AMA
is carried out.
NOTICE!
Repeated runs may heat the motor to a level where the
resistance R and R are increased. In most cases,
s r
however, this behavior is not critical.
ALARM 58, AMA Internal fault
Contact the Danfoss supplier.
WARNING 59, Current limit
The current is higher than the value in
parameter 4-18 Current Limit. Ensure that motor data in
parameters 1–20 to 1–25 are set correctly. Increase the
current limit if necessary. Ensure that the system can
operate safely at a higher 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 adjustable frequency drive
(via serial communication, digital I/O, or by pressing
[Reset]).
MG16I322
Operating Instructions
and I
nom
Danfoss A/S © 04/2015 All rights reserved.
WARNING/ALARM 61, Tracking error
An error between calculated motor speed and speed
measurement from feedback device. The function warning/
alarm/disable is set in parameter 4-30 Motor Feedback Loss
Function. Accepted error setting in parameter 4-31 Motor
Feedback Speed Error and the allowed time the error occur
setting in parameter 4-32 Motor Feedback Loss Timeout.
During a commissioning procedure, the function could be
effective.
WARNING 62, Output frequency at maximum limit
The output frequency is higher than the value set in
parameter 4-19 Max Output Frequency.
ALARM 63, Mechanical brake low
The actual motor current has not exceeded the release
brake current within the start delay time window.
ALARM 64, Voltage Limit
The load and speed combination demands a motor
voltage higher than the actual DC link voltage.
WARNING/ALARM 65, Control card overtemperature
The cut-out temperature of the control card is 176°F
[80°C].
Troubleshooting
•
Check that the ambient operating temperature is
within the limits.
•
Check for clogged filters.
•
Check the fan operation.
•
Check the control card.
WARNING 66, Heatsink temperature low
The adjustable frequency drive is too cold to operate. This
warning is based on the temperature sensor in the IGBT
module.
Increase the ambient temperature of the unit. Also, a
trickle amount of current can be supplied to the adjustable
frequency drive whenever the motor is stopped by setting
parameter 2-00 DC Hold/Preheat Current at 5% and
parameter 1-80 Function at Stop
Troubleshooting
The heatsink temperature measured as 32°F [0°C] could
indicate that the temperature 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 discon-
nected, 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. Check that the configuration
change is intentional and reset the unit.
ALARM 68, Safe Stop activated
Safe Torque Off 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 [Reset]).
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