Honeywell 3G SmartVFD HVFD3D3A0015 Installation And User Manual page 68

WARNING/ALARM 8, DC undervoltage
If the DC link voltage drops below the undervoltage limit, the adjustable frequency
drive checks if a 24 V DC backup supply is connected. If no 24 V DC backup supply
is connected, the adjustable frequency drive trips after a fixed time delay. The time
delay varies with unit size.
Troubleshooting
WARNING/ALARM 9, Inverter overload
The adjustable frequency drive is about to cut out because of an overload (current
too high for too long). The counter for electronic, thermal inverter protection issues
a warning at 98% and trips at 100%, while giving an alarm. The adjustable fre-
quency drive cannot be reset until the counter is below 90%.
The fault is that the adjustable frequency drive has run with more than 100% over-
load for too long.
Troubleshooting
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the motor is too hot. Select
whether the adjustable frequency drive issues a warning or an alarm when the
counter reaches 100% in 1-90 Motor Thermal Protection. The fault occurs when
the motor runs with more than 100% overload for too long.
Troubleshooting
31-00559-01
• Increase 14-26 Trip Delay at Inverter Fault
• If the alarm/warning occurs during a power sag, use kinetic backup (14-10
Line Failure)
• Make sure that the supply voltage matches the adjustable frequency drive
voltage.
• Perform input voltage test.
• Perform soft charge circuit test.
• Compare the output current shown on the LCP with the adjustable
frequency drive rated current.
• Compare the output current shown on the LCP with measured motor
current.
• Display the thermal drive load on the LCP and monitor the value. When
running above the adjustable frequency drive continuous current rating, the
counter increases. When running below the adjustable frequency drive
continuous current rating, the counter decreases.
• Check for motor overheating.
• Check if the motor is mechanically overloaded
• Check that the motor current set in 1-24 Motor Current is correct.
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