Maintenance, Diagnostics And Troubleshooting; Maintenance; List Of Warnings And Alarms - Danfoss VLT DriveMotor FCP 106 Operating Instructions Manual

Maintenance, Diagnostics an...

6 Maintenance, Diagnostics and Troubleshooting

6.1 Maintenance

Under normal operating conditions and load profiles, the
frequency converter is maintenance-free throughout its
designed lifetime. To prevent breakdown, danger, and
damage, examine the frequency converter at regular
intervals depending on the operating conditions. Replace
worn or damaged parts with original spare parts or
standard parts. For service and support, contact the local
Danfoss supplier.
1. Read the safety warnings in chapter 2 Safety.
2. Disconnect the frequency converter from mains.

6.2 List of Warnings and Alarms

Alarm/
warning Fault text
number
2 Live zero error
3 No motor
4 Mains ph. loss
7 DC over volt
8 DC under volt
Inverter
9
overload
10 Motor ETR over
11 Motor th over
13 Over Current
14 Earth Fault
16 Short Circuit
Control word
17
timeout
24 Fan fault
25 Brake resistor
short
27 Short circuited
28 Brake check
MG03L302
Operating Instructions
Warning Alarm Trip lock Cause of problem
X X
X
X X X
X X
X X
X X
X X
X X
X X X
X X X
X X
X X
X X
X X
X X
X X
Danfoss A/S © 11/2015 All rights reserved.
3. Disconnect the frequency converter from external
DC supply, if present.
4. Disconnect the frequency converter from the
motor as it can generate voltage when turned, for
example by windmilling.
5. Wait for discharge of the DC link. For discharge
time, see Table 2.1.
6. Remove the frequency converter from the motor
adapter plate or wall mount plate.
Signal on terminal 53 or 54 is less than 50% of value set in:
•
Parameter 6-10 Terminal 53 Low Voltage.
•
Parameter 6-12 Terminal 53 Low Current.
•
Parameter 6-20 Terminal 54 Low Voltage.
•
Parameter 6-22 Terminal 54 Low Current.
See also parameter group 6-0* Analog In/Out.
A motor has not been connected to the frequency converter.
Missing phase on supply side or excess voltage imbalance. Check
supply voltage. See parameter 14-12 Function at Mains Imbalance.
DC-link voltage exceeds limit.
DC-link voltage is lower than voltage warning low-limit.
More than 100% load for too long.
Motor is overheated due to more than 100% load for too long. See
parameter 1-90 Motor Thermal Protection.
Thermistor or thermistor connection is disconnected. See
parameter 1-90 Motor Thermal Protection.
Inverter peak current limit is exceeded.
Discharge from output phases to ground.
Short circuit in motor or on motor terminals.
No communication to frequency converter. See parameter group 8-0*
Comm. and Options.
External fans have failed either due to defect hardware, or due to
missing fans.
Brake resistor short-circuited: The brake resistor is monitored during
operation. If it short-circuits, the brake function is disconnected, and
the warning appears. Turn off the frequency converter and replace the
brake resistor.
Brake chopper fault: The brake transistor is short-circuited, or the brake
function is disconnected. If short-circuited, substantial energy is
dissipated in the brake resistor. Turn off the frequency converter as a
fire precaution.
Brake checked and failure detected.
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