Chapter 14. Faults
Fault
No.
Fault type Fault Description How to fix it
38 High Udc -
hardware failure
Too high voltage on the DC link
capacitors.
1. Check the configuration of electrical
connection of photovoltaic panels (too
many PV panels in series connection)
2. Check the connection of the dump
load resistor when using a synchronous
generator.
50 Short circuit -
hardware failure
Hardware protection has recorded the
occurrence of transistor short-circuits.
Check the connecting the power wires.
60 High current -
hardware failure
The amplitude of the current from the
RESs or electrical grid has reached a
value in excess of the limit.
1. Check the input current measurement
and the voltage measurement in the DC-
link circuit.
2. Check the reference voltage in the DC-
link circuit.
61 High current on
input 1
The amplitude of the input current at
input 1 has exceeded the limit.
62 High current on
input 2
The amplitude of the input current at
input 2 has exceeded the limit.
65 Too high
output current
The amplitude of the current send to the
electric grid reaches a value exceeding
the limit.
66 Overload Long-term value of the output current
exceed the nominal current.
1. Check that the power of the connected
loads does not exceed the inverter
power. 2. Check the cosφ of the installed
loads.
67 Output voltage
dip
The value of the generated voltage has
dropped below the threshold.
1. Check that the power of the loads
during their start-up is not greater than
150% of the inverter's rated power.
70 Varistor failure Failure of the varistors has been
detected.
Contact the service.
71 Low input 1
resistance
Too low resistance was detected
between input 1 and PE.
1. Check the installation wires.
2. Measure the resistance of the
installation poles relative to PE.
72 Low input 2
resistance
Too low resistance was detected
between input 2 and PE.
73 Low -DC
resistance
Too low resistance was detected
between i-DC and PE.
80
Timeout
Exceeding the response time in the
internal communication bus of the
inverter.
1. Check the connection of
communication wires inside the inverter.
2. In case of frequent failures contact the
service.
81 Communication
error
Erroneous data in the inverter's internal
communication bus.
91 Low electric grid
frequency – work
state
The electric grid frequency is too low or
inverter measurement module is
damaged
1. Check the electrical grid frequency.
2. In case of frequent failures contact the
service.
92 High electric grid
frequency – work
state
The electric grid frequency is too high or
inverter measurement module is
damaged
93 Low electric grid
voltage – work
state
The electric grid RMS voltage is too low
or inverter measurement module is
damaged.
1. Check the electrical grid voltage.
2. In case of frequent failures contact the
service.
94 High electric grid
voltage – work
state
The electric grid RMS voltage is too high
or inverter measurement module is
damaged.
95 Uref limit Electrical grid is no connected to the
inverter – anty-islanding protection
1. Check the electrical grid wires,
protection fuses, and be be sure main
switch power is ON.
68 PS100 – User manual
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