Danfoss FC 301 Operating Guide

Troubleshooting
Check for the following conditions:
•
The ambient temperature is too high.
•
The motor cables are too long.
•
Incorrect airow clearance above and below the
frequency converter.
•
Blocked airow around the frequency converter.
•
Damaged heat sink fan.
•
Dirty heat sink.
ALARM 30, Motor phase U missing
Motor phase U between the frequency converter and the
motor is missing.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualied personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Disconnect power before proceeding.
Troubleshooting
•
Remove the power from the frequency converter
and check motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the frequency converter and the
motor is missing.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualied personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Disconnect power before proceeding.
Troubleshooting
•
Remove the power from the frequency converter
and check motor phase V.
ALARM 32, Motor phase W missing
Motor phase W between the frequency converter and the
motor is missing.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualied personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Disconnect power before proceeding.
Troubleshooting
•
Remove the power from the frequency converter
and check motor phase W.
ALARM 33, Inrush fault
Too many power-ups have occurred within a short time
period.
Troubleshooting
•
Let the unit cool to operating temperature.
WARNING/ALARM 34, Fieldbus communication fault
The
eldbus on the communication option card is not
working.
WARNING/ALARM 35, Option fault
An option alarm is received. The alarm is option-specic.
The most likely cause is a power-up or a communication
fault.
WARNING/ALARM 36, Mains failure
This warning/alarm is only active if the supply voltage to
the frequency converter is lost and parameter 14-10 Mains
Failure is NOT set to [0] No Function. Check the fuses to the
frequency converter and mains power supply to the unit.
ALARM 37, Phase imbalance
There is a current imbalance between the power units.
ALARM 38, Internal fault
When an internal fault occurs, a code number dened in
Table 7.1 is shown.
Troubleshooting
•
Cycle power.
•
Check that the option is properly installed.
•
Check for loose or missing wiring.
.
Maintenance, Diagnostics, a... Operating Guide
MG33AT02 Danfoss A/S © 05/2018 All rights reserved. 27
7 7

Danfoss FC 301 Specifications

General

Type	AC Drive
Output frequency	0-1000 Hz
Enclosure rating	IP20, IP21, IP55
Control method	Sensorless vector control
Communication options	RS-485, CANopen, Profibus DP
Ambient temperature	-10°C to +50°C
Supply voltage	200-240 V, 380-500 V, 525-690 V
Protection class	IP20, IP21, IP55
Cooling method	Forced air
Relative humidity	5% to 95% (non-condensing)
Storage temperature range	-25 to 70 °C (-13 to 158 °F)