Troubleshooting PVA Operation
5-96
Short circuit current is much higher, or lower, than predicted by the model
Verify that the irradiance sensor is mounted in the plane of the array. Check for array soiling. Check
that the latitude, longitude, and azimuth are correctly entered in the Site Info screen, and that the
computer date and time are correct.
Unstable voltage message
Before performing a sweep, the PVA measures V
oc
10 times to get an average value. If there is a large
variation of values across these 10 measurements, the software posts a warning. Check for poor
connections anywhere in the measurement loop.
I-V Measurement Unit cannot be turned on
Check that the Unit has been charged.
Thermal fuse
The I-V Measurement Unit contains a thermal fuse set to trip if the inside of the I-V unit exceeds 85
o
C.
This is an uncommon occurrence because the software is programmed to dis-allow measurements when
the internal temperature exceeds approximately 70
o
C. However, if the thermal fuse trips, it irreversibly
shuts down the Unit and requires a return to factory. If you suspect that this has occurred, contact
Solmetric Technical Support.
For un-answered questions or guidance, feel free to contact us.
Solmetric Technical Support
Phone: 707-823-4600
Toll Free: 877-263-5026
Email: support@solmetric.com
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