ABB UNO-2.0-I-OUTD Product Manual page 91

- Message on display
Name of Derating and Cause
- Signal
Power limitation for over-voltage:
The message indicates that the user has set a power limitation
due to over voltage (parameter U >(10 min)) in order to reduce
the maximum output power of the inverter when the reading of the
- LIMxxx% CODE:02
average grid voltage exceeds certain limits.
- Display symbol
The sampling of readings is done every 10 minutes (U>(10min)).
b6
LIM xxx% = Power reduction percentage
Examples:
LIM 100% = no power limitation
LIM 50% = limitation to 50% of the output nominal power
Anti-islanding power limitation:
The message indicates that a power limitation is active since an
- LIMxxx% CODE:03
"islanding" condition has been recorded.
- Display symbol LIM xxx% = Power reduction percentage
b6 Examples:
LIM 100% = no power limitation
LIM 50% = limitation to 50% of the output nominal power
Power limitation due to low grid voltage:
The message indicates that an output power limitation may occur
- LIMxxx% CODE:04
since a low grid voltage (AC) condition has been recorded.
- Display symbol LIM xxx% = Power reduction percentage
b6 Examples:
LIM 100% = no power limitation
LIM 50% = limitation to 50% of the output nominal power
Power limitation due to excess temperature:
The message indicates that a power limitation is active since an
excess temperature condition has been recorded inside the inver-
ter (This parameter depends also on the power which the inverter
must provide since the measurement of temperatures is taken
- LIMxxx% CODE:05
internally and is influenced by the heat dissipated by the compo-
- Display symbol b7
nents of the inverter itself).
LIM xxx% = Power reduction percentage
Examples:
LIM 100% = no power limitation
LIM 50% = limitation to 50% of the output nominal power
Power limitation for input over-voltage:
The message indicates that a power limitation is active since an
- LIMxxx% CODE:06
input over voltage (AC) has been recorded.
- Display symbol
LIM xxx% = Power reduction percentage
b6
Examples:
LIM 100% = no power limitation
LIM 50% = limitation to 50% of the output nominal power
Solution
• Check the limitation value set in the "Settings >
Service > U > (10 min) Der." menu
• If the inverter remains connected to the grid and
the limitation is active, contact customer assistance
• Check that the grid voltage is lower than the mini-
mal voltage. Should this condition persist, contact
the grid operator to resolve the problem.
• Check that the inverter is not exposed to direct
sunlight. Wait for the temperatures to which the in-
verter is exposed to return to the operating range
and for the inverter to cool down.
- If the problem (once the ambient temperature has
returned within the range) persists, contact custo-
mer assistance.
• It is necessary to measure the input voltage inside
the inverter with a voltmeter.
- If it is higher than the maximum voltage of the ope-
rating range, the alarm is genuine and it is necessa-
ry to check the configuration of the PV generator. If
the voltage has also exceeded the maximum input
threshold the inverter could be damaged.
- If it is lower than the maximum voltage of the ope-
rating range, the alarm is caused by an internal
malfunction and it is necessary to contact customer
assistance.
- 91 -
8 - Maintenance