Diagnostics
H-Max HVAC Drives MN04008004E—September 2011 www.eaton.com 19
Diagnostics
Under this menu, you can find Active faults, Reset faults, Fault history, Counters and Software info.
Active Faults
Reset Faults
Fault History
Fault Codes
Fault Codes and Descriptions
Menu Function Note
Active faults When a fault/faults appear(s), the display with the name of
the fault starts to blink. Press OK to return to the
Diagnostics menu. The Active faults submenu shows the
number of faults. Select the fault and push OK to see the
fault-time data.
The fault remains active until it is cleared with the Reset
button (push for 2s) or with a reset signal from the I/O
terminal or Fieldbus or by choosing Reset faults (see
below). The memory of active faults can store the
maximum of 10 faults in the order of appearance.
Menu Function Note
Reset faults In this menu you can reset faults. For closer instructions. CAUTION! Remove external Control signal before
resetting the fault to prevent unintentional restart
of the drive.
Menu Function Note
Fault history 40 latest faults are stored in the Fault history. Entering the Fault history and clicking OK on the selected
fault shows the fault time data (details).
Fault
Code
Fault
ID Fault Name Possible Cause Remedy
1 1 Overcurrent
(hardware fault)
AC drive has detected too high a current
(>4*I
H
) in the motor cable:
• Sudden heavy load increase
• Short circuit in motor cables
• Unsuitable motor
• Check loading
• Check motor
• Check cables and connections
• Make identification run
• Check ramp times
2 Overcurrent
(software fault)
2 10 Overvoltage
(hardware fault)
The DC-link voltage has exceeded the
limits defined:
• Too short a deceleration time
• Brake chopper is disabled
• High overvoltage spikes in supply
• Start/Stop sequence too fast
• Make deceleration time longer
• Use brake chopper or brake resistor
(available as options)
• Activate overvoltage controller
• Check input voltage
11 Overvoltage
(software fault)
3 20 Earth fault
(hardware fault)
Current measurement has detected that
the sum of motor phase current is not zero:
• Insulation failure in cables or motor
Check motor cables and motor
21 Earth fault
(software fault)
5 40 Charging switch The charging switch is open, when the
START command has been given:
• Faulty operation
• Component failure
• Reset the fault and restart
• Should the fault re-occur, contact the
distributor near to you
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