Fronius Primo 3.0-1, Service Manual, Page: 98 / 160

98
Class 5-6 service
codes Class 5 - 6 status codes do not generally interfere with feeding energy into the grid, but can
cause restrictions. These status codes are displayed until they are acknowledged by
pressing a key (however, the inverter continues to operate normally in the background).
472 Faulty fuse for solar module
ground 1. Faulty fuse for solar module
ground 1. Replace fuse
2. Incorrect setting in Basic
Service menu 2. Set DC mode to "floating"
474 RCMU sensor fault 1. Rapidly changing insolation
conditions 1. Automatic correction
2. Faulty sensor 2. Replace filter PC board
475 Insulation fault detected 1. Incorrect setting 1. Check ISO / GFDI setting
2. Grounding fault on PV gen-
erator 2. Check PV generator
3. Faulty power stage set
measuring circuit 3. Replace DC PC board; re-
place AC PC board if neces-
sary
476 No internal power supply 1. Grid voltage too low 1. Check wiring
2. Grid test time too short 2. Power failure
3. Inadequate internal power
supply 3. Replace AC PC board
4. Inadequate internal power
supply 4. Replace filter PC board
480 Power stage set software
and display software are in-
compatible 1. Old power stage set/display
software 1. Software update
2. Old software 2. Reload setup
3. Incompatible hardware com-
bination 3. Check hardware compo-
nents
481 Recerbo has an old soft-
ware version 1. Old Recerbo software 1. Software update
2. Old software 2. Reload setup
3. Incompatible hardware com-
bination 3. Check hardware compo-
nents
482 Inverter switched off during
start-up 1. Start-up process was unsuc-
cessful 1. Restart the inverter
483 Set DC2 fixed voltage is
outside the permitted MPP
range 1. Incorrectly set fixed voltage 1. Check the settings
484 - 485 Error during data transfer 1. Communication problem
caused by temporary environ-
mental interference (grid,
EMC, etc.) 1. Automatic correction
2. Check ribbon cable between
filter PC board and power
stage set 2. Replace ribbon cable
3. Faulty AC guard on filter PC
board 3. Replace filter PC board
4. Faulty AC guard on power
stage set 4. Replace AC PC board
Code Description Behaviour Remedy