Solar Lattice

Fault codes › Fronius › Fronius Primo 208-240 (3.8-1 to 15.0-1)

Fronius Primo 502

Code
502
Shown as
Insulation fault on solar modules
Vendor severity
Class 5
ID
fc:fronius-primo-502
IRI
https://solarlattice.org/kb/fc/fronius-primo-502
Status
active
Also known as
502, Fronius 502, Insulation fault on solar modules
Category
Inverters
Class warning drafted · lead
Production unaffected drafted · lead
Clears not stated

Decoded

Reports low insulation resistance; may indicate loss of electrical insulation; look at PV array; do: contact system installer.

What can be behind Low insulation resistance

Failure modes that present as the reported condition, and the tests that tell them apart.

Defined in

The manufacturer's own cause and corrective text is not reproduced here.

Same condition on other equipment

ABB / FIMER
ABB / FIMER PVS-166-175-TL E025, ABB / FIMER PVS-166-175-TL E037, ABB / FIMER PVS-60-TL E025, ABB / FIMER PVS-60-TL E037, ABB / FIMER TRIO-20.0-27.6-TL E025, ABB / FIMER TRIO-20.0-27.6-TL E037, ABB / FIMER UNO-DM-3.3-5.0-PLUS E025, ABB / FIMER UNO-DM-6.0-PLUS E025
CPS
CPS SCA25KTL-208 IsolationErr, CPS SCA25KTL-480 IsolationErr, CPS SCA36KTL IsolationErr, CPS SCA50-100K-T Protect0190, CPS SCA50-60KTL IsolationErr, CPS SCH100-125KTL IsolationErr, CPS SCH125KTL-AIO IsolationErr, CPS SCH200-250K-T IsolationErr, CPS SCH275KTL IsolationErr, CPS SCH350KTL IsolationErr
Canadian Solar
Canadian Solar 125K-T600GL02 PV ISO-PRO 01/02, Canadian Solar 125K-T600GL02 PV-MID-ISO, Canadian Solar 185-255K PV ISO-PRO 01/02, Canadian Solar 23-28KTL-CT IsolationErr, Canadian Solar 25-40K-T480GL01 PV ISO-PRO 01/02, Canadian Solar 50-66K-T480GL01 PV ISO-PRO 01/02, Canadian Solar 75-100K-T480GL02 PV ISO-PRO 01/02
Enphase
Enphase IQ7 DC Resistance Low - Power Off, Enphase IQ8 DC Resistance Low - Power Off, Enphase IQ9N DC Resistance Low - Power Off, Enphase M215-M250 DC Resistance Low - Power Off
Fronius
Fronius Galvo 502, Fronius Primo 447, Fronius Symo 447, Fronius Symo 502
Huawei
Huawei SUN2000-100KTL-USH0 2062, Huawei SUN2000-25-30KTL-US 313, Huawei SUN2000-45KTL-US-HV-D0 313
KACO new energy
KACO new energy blueplanet TL3 181, KACO new energy blueplanet TL3 182, KACO new energy blueplanet TL3 183
SMA
SMA SB-US-40 3501, SMA SB-US-41 3501, SMA SBSE-US-50 3501, SMA PEAK3-US 3501, SMA CORE1-US 3501, SMA STP-TL-US 3501, SMA STP-X-US 3501, SMA SC-CP-XT 3501, SMA SC-CP-XT 3504, SMA SC-CP-XT 3510, SMA SC-CP-XT 3511
Schneider Electric
Schneider Electric CL125 039, Schneider Electric CL125 055
Solis
Solis 1P-4G-US PV ISO-PRO 01/02, Solis 3P-5G-US PV ISO-PRO 01/02, Solis RHI-1P-HV PV ISO-PRO 01/02, Solis S5-GC PV ISO-PRO 01/02, Solis S6-EH1P PV ISO-PRO 01/02, Solis S6-GC PV ISO-PRO 01/02, Solis S6-GU PV ISO-PRO 01/02
Sungrow
Sungrow SG-CX-US 039, Sungrow SG200HX 039, Sungrow SG250HX 39, Sungrow SG350HX 039
Yaskawa Solectria
Yaskawa Solectria PVI-25TL-R IsolationErr, Yaskawa Solectria PVI-TL IsolationErr

Same code in other families

Claims

defined_in

c1 drafted · lead fronius-primo-208-240-emanual-status-codes

reports

c2 drafted · lead Low insulation resistance

indicates

c3 drafted · lead Loss of electrical insulation

affects

c4 drafted · lead PV array

has_event_class

c5 drafted · lead Warning (device continues, a condition is flagged)

has_production_effect

c6 drafted · lead No production effect

review note: support check: partial - Class 5 generally doesn't impair feed-in, but u18 doesn't tie 502 to class 5, and 'can lead to limitations'.

mitigated_by

c7 drafted · lead Contact system installer

When the code keeps recurring.

applies_to

c8 drafted · lead Fronius Primo 208-240

Data