Irradiance Error Codes

The solar irradiance processor is an internal part of SAM’s code that makes solar irradiance calculations and performs checks on the data in a weather file for the solar performance models.

If the code identifies a potential problem with the data, it returns a simulation message similar to this with a code number:

`exec fail(pvsamv1): Failed to calculate POA irradiance 1 (code: -105) [y:2017 m:1 d:1 h:0 minute:30]`

The following is a list of conditions for each code:

Code	Conditions
-101	Negative time stamp or time step greater than one.
-102	Latitude or longitude value out of range.
-103	Irradiance mode or sky diffuse choice set incorrectly.
-104	Tracking mode choice set incorrectly. Valid values are between zero and four.
-105	Irradiance value out of range for DNI / DHI mode: DNI or DHI value is negative or greater than 1,500 W/m².
-106	Irradiance value out of range for DNI / GHI mode: DNI or GHI value is negative or greater than 1,500 W/m².
-107	Albedo value is negative or greater than one.
-108	Array tilt angle is negative or greater than 90 degrees.
-109	Array azimuth angle is negative or greater than 360 degrees.
-110	Array rotation limit (for one-axis tracking) is less than -90 degrees or greater than 90 degrees.
-111	Irradiance value out of range for GHI / DHI mode: GHI or DHI value is negative or greater than 1,500 W/m².
-112	Array stow angle (for one-axis tracking) is less than -90 degrees or greater than 90 degrees.