Fronius Primo 3.0-1 Service Manual page 97

Code Description
452 Communication fault be-
tween filter and power
stage set
453 Redundant grid monitoring
has detected an incorrect
grid voltage
454 Redundant grid monitoring
has detected an incorrect
grid frequency
456 Fault detected in the island-
ing monitoring
457 Grid relay does not trigger
458 RCMU self-test failed
459 Insulation measurement
fault
460 Reference voltage outside
the permissible limit
461 Faulty data memory
462 Fault detected in monitoring
system for DC braking
463 AC pin reserved
Behaviour
1. Communication problem
caused by temporary environ-
mental interference (grid,
EMC, etc.)
2. Check ribbon cable between
filter PC board and power
stage set
3. Faulty filter PC board
4. Faulty power stage set
1. Measurement fault
2. Grid problem
3. Faulty AC guard on filter PC
board
4. Faulty AC guard on power
stage set
1. Measurement fault
2. Grid problem
3. Faulty AC guard on filter PC
board
4. Faulty AC guard on power
stage set
1. Occurs once
2. Software problem
3. Measurement fault on filter
PC board
4. Faulty measuring circuit for
anti-islanding
1. Occurs once
2. Grid test time too short
3. Grid relay jammed
1. RCMU measurement fault
1. Occurs once
2. Insulation measurement
fault
1. Occurs once
2. Faulty power stage set
measuring circuit
1. Faulty power stage set
1. Occurs once
2. Faulty monitoring system for
DC braking
1. AC connection between
power stage set and filter PC
board is fitted in the wrong di-
rection (L1 and L2 swapped)
Remedy
1. Automatic correction
2. Replace ribbon cable
3. Replace filter PC board
4. Replace AC PC board
1. Software update
2. Automatic correction
3. Replace filter PC board
4. Replace AC PC board
1. Software update
2. Automatic correction
3. Replace filter PC board
4. Replace AC PC board
1. Restart the inverter
2. Software update
2. Replace filter PC board
3. Replace AC PC board
1. Restart the inverter
2. Change settings
3. Replace AC PC board
1. Replace filter PC board
1. Restart the inverter
2. Replace DC PC board; re-
place AC PC board if neces-
sary
1. Restart the inverter
2. Replace AC PC board
1. Replace DC PC board; re-
place AC PC board if neces-
sary
1. Restart the inverter
2. Replace inverter
1. Check wiring
97