0 troubleshooting problems, 1 problems with the display – Go Power! GP-PWM-30 User Manual

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Solar Controller




© 2012 Carmanah Technologies Corporation

September 2012

8.0 Troubleshooting Problems

How to read this section
Troubleshooting Problems is split into three sub-sections, grouped by
symptoms involving key components. Components considered irrelevant
in a diagnosis are denoted ‘Not Applicable’ (N/A). A multimeter or
voltmeter may be required for some procedures listed.

It is imperative all electrical precautions stated in the Warning Section
and outlined in the Installation Section are followed. Even if it appears
the system is not functioning, it should be treated as a fully functioning
system generating live power.

8.1 Problems with the Display

Display Reading: Blank

Time of Day: Daytime/Nighttime

Possible Cause:

(1) Battery or fuse connection and/or solar array connection (Daytime only).
(2) Battery or fuse connection (Nighttime only).

How to tell:
(1) & (2) Check the voltage at the controller battery terminals with a voltmeter and compare
with a voltage reading at the battery terminals.

If there is no voltage reading at the controller battery terminals, the problem is in the wiring
between the battery and the controller. If the battery voltage is lower than 6 volts the
controller will not function.
For the solar array, repeat steps 1 and 2 substituting all battery terminals with solar array


(1) & (2) Check all connections from the controller to the battery including checking for
correct wire polarity. Check that all connections are clean, tight, and secure. Ensure the
battery voltage is above 6 volts.