Emotron AB 01-4429-01r2 Troubleshooting, Diagnoses and Maintenance 147
12. Troubleshooting, Diagnoses and Maintenance
12.1 Trips, warnings and limits
In order to protect the variable speed drive the principal
operating variables are continuously monitored by the sys-
tem. If one of these variables exceeds the safety limit an
error/warning message is displayed. In order to avoid any
possibly dangerous situations, the inverter sets itself into a
stop Mode called Trip and the cause of the trip is shown in
the display.
Trips will always stop the VSD. Trips can be divided into
normal and soft trips, depending on the setup Trip Type, see
menu [250] Autoreset. Normal trips are default. For normal
trips the VSD stops immediately, i.e. the motor coasts natu-
rally to a standstill. For soft trips the VSD stops by ramping
down the speed, i.e. the motor decelerates to a standstill.
“Normal Trip”
• The VSD stops immediately, the motor coasts to natu-
rally to a standstill.
• The Trip relay or output is active (if selected).
• The Trip LED is on.
• The accompanying trip message is displayed.
• The “TRP” status indication is displayed (area D of the
display).
“Soft Trip”
• the VSD stops by decelerating to a standstill.
During the deceleration.
• The accompanying trip message is displayed, including
an additional soft trip indicator “S” before the trip time.
• The Trip LED is blinking.
• The Warning relay or output is active (if selected).
After standstill is reached.
• The Trip LED is on.
• The Trip relay or output is active (if selected).
• The “TRP” status indication is displayed (area D of the
display).
Apart from the TRIP indicators there are two more indica-
tors to show that the inverter is in an “abnormal” situation.
“Warning”
• The inverter is close to a trip limit.
• The Warning relay or output is active (if selected).
• The Trip LED is blinking.
• The accompanying warning message is displayed in win-
dow [722] Warning.
• One of the warning indications is displayed (area F of
the display).
“Limits”
• The inverter is limiting torque and/or frequency to avoid
a trip.
• The Limit relay or output is active (if selected).
• The Trip LED is blinking.
• One of the Limit status indications is displayed (area D
of the display).
Table 30 List of trips and warnings
Trip/Warning
messages
Selections
Trip
(Normal/
Soft)
Warning
indicators
(Area D)
Motor I
2
t Trip/Off/Limit Normal/Soft I
2
t
PTC Trip/Off Normal/Soft
Motor lost Trip/Off Normal
Locked rotor Trip/Off Normal
Ext trip Via DigIn Normal/Soft
Ext Mot Temp Via DigIn Normal/Soft
Mon MaxAlarm Trip/Off/Warn Normal/Soft
Mon MinAlarm Trip/Off/Warn Normal/Soft
Comm error Trip/Off/Warn Normal/Soft
PT100 Trip/Off Normal/Soft
Deviation Via Option Normal
Pump Via Option Normal
Over temp On Normal OT
Over curr F On Normal
Over volt D On Normal
Over volt G On Normal
Over volt On Normal
Over speed On Normal
Under voltage On Normal LV
Power Fault On Normal
Desat On Normal
DClink error On Normal
Ovolt m cut On Normal
Over voltage Warning VL
Safe stop Warning SST
Motor PTC On Normal
LC Level
Trip/Off/Warn
Via DigIn
Normal/Soft LCL
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