Understanding Danfoss VFD Error codes;

   A warning or an alarm will appear in the display as a numerical code Err. xx. A warning will be shown on the display until the fault has been corrected, while an alarm will continue to flash until
the [STOP/RESET] key is activated.The table shows the various warnings and alarms, and whether the fault locks the frequency converter. After a Trip locked the mains supply is cut off and the fault is corrected.

   The mains supply is reconnected and the frequency converter is reset. The frequency converter is now ready. A Trip can be reset manually in three ways:

1. Via the operating key [STOP/RESET].
2. Via a digital input.
3. Via serial communication.

    It is also possible to choose an automatic reset in parameter 405 Reset function. When a cross appears in both warning and alarm, this can mean that a warning comes before an alarm. It can also mean that it is possible for the user to programme whether a warning or an alarm will appear for a given fault.

   For example, this is possible in parameter 128 Motor thermal protection. After a trip the motor will coast, and alarm and warning will blink on the frequency converter, but if the fault disappears only the alarm will blink. After a reset the frequency converter will be ready to start operation again.
W: Warning, A: Alarm, T: Trip locked

Err 2 Live zero error (LIVE ZERO ERROR)
X X X Voltage or current signal on terminals 53 or 60 is below 50% of preset value.
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Err 4 Mains phase loss (MAINS PHASE LOSS)
X X X No phase on mains supply side.
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Err 5 Voltage warning high (DC LINK VOLTAGE HIGH)
X The intermediate circuit voltage exceeds the limit set.
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Err 6 Voltage warning low (DC LINK VOLTAGE LOW)
X The intermediate circuit voltage is lower the limit set.
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Err 7 Overvoltage (DC LINK OVERVOLT)
X X X The intermediate voltage exceeds the limit set.
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Err 8 Undervoltage (DC LINK UNDERVOLT)
X X X The intermediate voltage is lower than the limit set.
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Err 9 Inverter overload (INVERTER TIME)
X X The frequency converter is close to tripping due to overload.
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Err 10 Motor overloaded ( MOTOR,TIME)
X X The motor is too hot due to overload.
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Err 11 Motor thermistor (MOTOR THERMISTOR)
X X Either the motor is too hot or the thermistor has been disconnected.
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Err 12 Current limit (CURRENT LIMIT)
X X Output current is higher than set in par. 221.
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Err 13 Overcurrent (OVERCURRENT)
X X X The peak current limit has been exceeded.
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Err 14 Earth fault (EARTH FAULT) X X Discharge from output phases to earth.
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Err 15 Switch mode fault (SWITCH MODE FAULT)
X X Fault in switch mode power supply.
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Err 16 Short-circuit (CURR. SHORT CIRCUIT)
X X Short-circuit on the motor terminals or in the motor.
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Err 17 Serial communication timeout (STD BUS TIMEOUT)
X X No serial communication to the frequency converter.
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Err 18 HPFB bus timeout (HPFB TIMEOUT)
X X No serial communication to the communication option card.
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Err 33 Out of frequency range (OUT FREQ RNG/ROT LIM)
X Output frequency has reached the limit set in either par. 201 or par. 202.
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Err 34 HPFB communication fault (PROFIBUS OPT. FAULT)
X X Fault only occurs in fieldbus versions. Please see par. 953 in fieldbus literature.
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Err 35 Inrush fault (INRUSH FAULT)
X X Connected to mains too many times within 1 minute.
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Err 36 Overtemperature (OVERTEMPERATURE)
X X The upper temperature limit has been exceeded.
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Err 37-45 Internal fault (INTERNAL FAULT)
X X Please contact our Danfoss personal.
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Err 50 Auto-tunning not possible X Either RS (stator resistance) value is outside permitted limits, or motor current is too low on at least one phase, or the motor is too small for Auto-tunning.
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Err 51 Auto-tunning fault re. nameplate data (AMT TYPE.DATA FAULT)
X Inconsistency between registered motor data.
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Err 54 Auto-tunning wrong motor (AMT WRONG MOTOR)
X AMA has detected a missing motor phase.
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Err 55 Auto-tunning timeout (AMT TIMEOUT)
X Calculations are taking too long, probably caused by noise on motor cables.
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Err 56 Auto-tunning warning during AMT (AMT WARN. DURING AMT)
X Warning is given while AMA is performed.
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Err 99 Locked (LOCKED) X See par. 018.

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