Danfoss VLT FC 103 Operating page 136

VLT® Refrigeration Drive FC 103
Operating Guide
9.3.82 ALARM 88, Option Detection
Cause
A change in the option layout is detected. Parameter 14-89 Option Detection is set to [0] Frozen configuration and the option layout
has been changed.
Troubleshooting
•
To apply the change, enable option layout changes in parameter 14-89 Option Detection.
• Alternatively, restore the correct option configuration.
9.3.83 ALARM 90, Feedback Monitor
Troubleshooting
• Check the connection to the encoder/resolver option and, if necessary, replace the VLT
Input MCB 103.
9.3.84 ALARM 91, Analog Input 54 Wrong Settings
Troubleshooting
• Set switch S202 in position OFF (voltage input) when a KTY sensor is connected to analog input terminal 54.
9.3.85 ALARM 99, Locked Rotor
Cause
The rotor is blocked.
Troubleshooting
• Check if the motor shaft is locked.
• Check if the start current triggers the current limit set in parameter 4-18 Current Limit.
• Check if it increases the value in parameter 30-23 Locked Rotor Detection Time [s].
9.3.86 WARNING/ALARM 104, Mixing Fan Fault
Cause
The fan is not operating. The fan monitor checks that the fan is spinning at power-up or whenever the mixing fan is turned on. The
mixing fan fault can be configured as a warning or an alarm in parameter 14-53 Fan Monitor.
Troubleshooting
• Cycle power to the drive to determine if the warning/alarm returns.
9.3.87 WARNING/ALARM 122, Mot. Rotat. Unexp.
Cause
The drive performs a function that requires the motor to be at standstill, for example DC hold for PM motors.
9.3.88 WARNING 163, ATEX ETR Cur.Lim.Warning
Cause
The drive has run above the characteristic curve for more than 50 s. The warning is activated at 83% and deactivated at 85% of the
allowed thermal overload.
9.3.89 ALARM 164, ATEX ETR Cur.Lim.Alarm
Cause
Running above the characteristic curve for more than 60 s within a period of 600 s activates the alarm, and the drive trips.
9.3.90 WARNING 165, ATEX ETR Freq.Lim.Warning
Cause
The drive has run for more than 50 s below the allowed minimum frequency (parameter 1-98 ATEX ETR Interpol. Points Freq.).
9.3.91 ALARM 166, ATEX ETR Freq.Lim.Alarm
The drive has run for more than 60 s (in a period of 600 s) below the allowed minimum frequency (parameter 1-98 ATEX ETR Interpol.
Points. Freq.).
136 | Danfoss A/S © 2020.09
Maintenance, Diagnostics, and
Troubleshooting
Encoder Input MCB 102 or VLT
®
AQ357954340588en-000201 / 130R0881
Resolver
®