Fronius Symo 3.0-3-S Serviceanleitung Seite 86

Code Description
302 Current peak on the PV
generator
303 Too high heat sink temper-
ature
306 POWER LOW
307 DC LOW
308 The intermediate circuit
voltage
309 Too high DC1 voltage
313 Too high DC2 voltage
86
Behaviour
1. Bad contact: wall bracket <-
> inverter
2. Voltage drop in the public
mains
3. Measuring error on the pow-
er stage set
1. Ventilation opening blocked
2. Too high ambient tempera-
ture
3. In- or outside fan cable not
connected
4. In- or outside fan defective
5. Bad contact: wall bracket <-
> heat sink
6. Measuring error on the pow-
er stage set
7. Fan output on Recerbo de-
fective
1. DC power is too low for feed-
ing in
2. Measuring error on the pow-
er stage set
1. DC main switch open
2. PV generator not connected
3. DC voltage too low for feed-
ing in
4. Reversal voltage of PV gen-
erator
5. DC operation mode: fix volt-
age + wrong voltage
6. Measuring error on the pow-
er stage set
1. Voltage drop on AC grid
2. Bad contact: wall bracket <-
> inverter
3. Measuring error on the pow-
er stage set
1. PV generator voltage too
high in MPP1
2. Wrong DC cabling in MPP 1
3. Measuring error on the pow-
er stage set
1. PV generator voltage too
high in MPP 2
2. Wrong DC cabling in MPP 2
3. Measuring error on the pow-
er stage set
Remedy
1. Check AC wall bracket
screws
2. Automatic correction
3. Change DC board. After-
wards if necessary AC board
1. Clean openings
2. Change mounting place
3. Connect fan cable
4. Change fan
5. Check phase change paste
6. Change AC board
7. Change Recerbo
1. Wait for more irradiance or
check PV modules
2. Change DC board. After-
wards if necessary AC board
1. Close DC main switch
2. Connect PV generator
3. Wait for more irradiance or
check PV modules
4. Reverse polarity of PV gen-
erator
5. Check MPP settings / volt-
age
6. Change DC board. After-
wards if necessary AC board
1. Automatic correction
2. Check AC wall bracket
screws
3. Change AC board
1. Check PV configuration
2. Check DC cabling
3. Change DC board. After-
wards if necessary AC board
1. Check PV configuration
2. Check DC cabling
3. Change DC board. After-
wards if necessary AC board