Maintenance, Diagnostics And Troubleshooting; Maintenance; Before Starting Repair Work; 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, refer to
www.danfoss.com/contact/sales_and_services/.

6.2 List of Warnings and Alarms

Alarm/
warning Fault text
number
2 Live zero error
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
25 Brake resistor
short
27 Short circuited
28 Brake check
30 U phase loss
31 V phase loss
32 W phase loss
38 Internal fault
MG03L202
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
X X
X X
Danfoss A/S © Rev. 06/2014 All rights reserved.

6.1.1 Before Starting Repair Work

Before starting repair work:
1. Read the safety warnings in
2. Disconnect the frequency converter from mains.
3. Disconnect the frequency converter from external
DC supply, if present.
4. Disconnect the frequency converter from 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 mounting plate.
Signal on terminal 53 or 54 is less than 50% of value set in
6-10 Terminal 53 Low Voltage, 6-12 Terminal 53 Low Current,
6-20 Terminal 54 Low Voltageor 6-22 Terminal 54 Low Current. See
also parameter group 6–0* Analog In/Out
Missing phase on supply side or excess voltage imbalance. Check
supply voltage. See 14-12 Function at Mains Imbalance
Intermediate circuit voltage exceeds limit.
Intermediate circuit 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
1-90 Motor Thermal Protection.
Thermistor or thermistor connection is disconnected. See 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.
Motor phase U is missing. Check the phase. See 4-58 Missing Motor
Phase Function.
Motor phase V is missing. Check the phase. See 4-58 Missing Motor
Phase Function.
Motor phase W is missing. Check the phase. See 4-58 Missing Motor
Phase Function.
Contact the local Danfoss supplier.
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