101
EN-US
450 No guard controller detect-
ed
1. Ribbon cable between the
power module and filter PC
board faulty or not connected
correctly
1. Check ribbon cable between
Recerbo and the power mod-
ule
2. Filter PC board faulty 2. Replace filter PC board
451 Memory error for a micro-
controller
1. Grid problem 1. Automatically corrected
2. Faulty AC guard on filter PC
board
2. Replace filter PC board
3. Faulty AC guard on power
module
3. Replace AC PC board
452 Communication between
filter and power module
faulty
1. Communication problem
caused by temporary environ-
mental faults (grid, EMC, etc.)
1. Automatically corrected
2. Ribbon cable between filter
PC board and power module
faulty
2. Replace ribbon cable
3. Filter PC board faulty 3. Replace filter PC board
4. Power module faulty 4. Replace AC PC board
453 Redundant grid monitoring
has detected faulty grid
voltage
1. Measurement error 1. Software update
2. Grid problem 2. Automatically corrected
3. Faulty AC guard on filter PC
board
3. Replace filter PC board
4. Faulty AC guard on power
module
4. Replace AC PC board
454 Redundant grid monitoring
has detected faulty grid fre-
quency
1. Measurement error 1. Software update
2. Grid problem 2. Automatically corrected
3. Faulty AC guard on filter PC
board
3. Replace filter PC board
4. Faulty AC guard on power
module
4. Replace AC PC board
456 Fault detected in islanding
monitoring
1. Occurs once 1. Restart inverter
2. Software problem 2. Software update
3. Measurement error on filter
PC board
2. Replace filter PC board
4. Measurement circuit for anti-
islanding faulty
3. Replace AC PC board
457 Grid relay does not trigger 1. Occurs once 1. Restart inverter
2. Grid test time is too low 2. Change settings
3. Grid relay sticks 3. Replace AC PC board
458 RCMU self-test faulty 1. RCMU measurement faulty 1. Replace filter PC board
459 Faulty insulation measure-
ment
1. Occurs once 1. Restart inverter
2. Insulation measurement
faulty
2. Replace DC PC board and
then, if necessary, AC PC
board
460 Reference voltage outside
of permissible limit
1. Occurs once 1. Restart inverter
2. Measurement circuit on
power module defective
2. Replace AC PC board
461 Faulty data memory 1. Faulty power module 1. Replace DC PC board and
then, if necessary, AC PC
board
Code Description Behavior Remedy
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