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 FIGURE 4-4
Solar Control Tester
Next, the dial is turned slowly downward to lower differentials. This increases the
resistance shown to the collector sensor terminal. At the "off" differential, the control
should shut off.
Many testers also include a high limit test function. Generally, the tester shorts out
the collector sensor's terminals, to ensure the control is trying to run the system.
Then, the resistance supplied to the storage sensor terminals is reduced,
impersonating a rising storage temperature. When the high limit is reached, the
control should shut off.
About Accuracy
The dials on most testers are not very accurate. If the control has a digital display,
use that instead of the numbers on the tester dial.
TROUBLESHOOTING
4.3 TROUBLESHOOTING OPERATIONS
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