Xantrex Technology 175 PLUS - Manual (Page 38)

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The AC load will not operate. No inverter lights are on.
Inverter will run some small loads, but not larger ones.
Possible Cause Suggested Remedy
Battery is defective. Check battery and replace if
required.
The inverter has been connected
with reverse DC input polarity.
Check connection to battery. The
inverter has likely been damaged
and needs to be repaired. Have the
unit repaired (not covered under
warranty).
Loose cable connections. Check cables and connections.
Tighten as required.
Possible Cause Suggested Remedy
Voltage drop across DC cables. Shorten cables or use heavier
cables.