Vacon 20, Complete User'S Manual

Page: 55 / 160

fault tracing vacon
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5
5. FAULT TRACING
When a fatal fault is detected by the frequency converter control electronics, the
drive will stop and the symbol FT and the fault code blinked on the display are in the
following format, e.g.:
The active fault can be reset by pressing BACK / RESET button when the API is in ac-
tive fault menu level (FT XX), or pressing BACK / RESET button with long time (> 2 s)
when the API is in active fault submenu level (F5.x ), or via the I / O terminal or field
bus. Reset fault history (long push > 5 s), when the API is in fault history submenu
level (F6.x). The faults with subcode and time labels are stored in the Fault history
submenu which can be browsed. The different fault codes, their causes and correct-
ing actions are presented in the table below.
Fault
code
Fault name Possible cause Correcting actions
1
Overcurrent
Frequency converter has
detected too high a current
(>4*I
N
) in the motor cable:
• sudden heavy load increase
• short circuit in motor cables
• unsuitable motor
Check loading.
Check motor size.
Check cables.
2
Overvoltage
The DC-link voltage has
exceeded the internal safety
limit:
• deceleration time is too short
• high overvoltage peaks in
mains
Increase the deceleration
time (Par.4.3 or Par.4.6)
3
Earth fault
Current measurement has
detected extra leakage current at
start:
• insulation failure in cables or
motor
Check motor cables and
motor
Table 5.1: Fault codes
Fault code (02 = overvoltage)
FT 2