Guidebook – sunlight pump – ennos AG
Date:
18.01.2017
Page
29 of 32
copyright
ennos 2017
Trouble shooting
If the Motor does not turn and the ECU switches between “wait for energy” and “start-‐up” only. There are different
reasons for this behavior:
1.
Insufficient power from the PV array.
The system can only start if there is sufficient sun available to power the motor. During morning and
evening time as well as cloudy situations, this is normal.
Check with sun power meter or measure the short circuit current of the PV Array.
2.
Pump blocked.
If there is sufficient sun power available to run the motor, probably the pump is clogged or broken.
Disassemble the pump from the flange and check if you can rotate it by hand. If not, try to free it by
rotating it by hand or replace the pump.
Check if the Motor starts when the pump is not connected. If it doesn’t start at all, replace the Solar Drive
with a spare one or check with the technical support person.
When the motor runs without load, it will stop after 2-‐5 seconds. This is a normal behavior and not a
problem.
Whenever you are unsure about the actual output Power of the PV Panel, use a Sun Power Meter to measure the
irradiance. A cheap Sun Power meter can be purchased from Daystar PV –
www.daystarpv.com
or PCE –
www.pce-‐
instruments.com
.
13.1
Water output lesser than expected
If the water output is lesser than expected check if the installation is according to this manual. This includes
especially PV Array sizing, orientation and maintenance, electrical installation and sizing of the wires, sizing,
installation and maintenance of the piping and filter.
First, check if the filter has been cleaned regularly, then complete a system inspection and testing before
contacting any support engineer.
13.2
System Inspection
To locate most of the problems, a simple inspection is sufficient. This can be done without any electrical
knowledge.
13.2.1
PV Array
-‐
Check if the array is oriented according to chapter 6 (sun facing, tilting angle, etc.)
-‐
Check if the complete PV array is free of shadows. Even small leaves, dirt or a little shade (<10%) from a
tree can cause the system to stop
13.2.2
Wiring
-‐
Check all connections if wired correctly. Take care about polarity of signals.
-‐
Check all terminals and connections between cables as improper connection is a major reason for
malfunction. Pull the wires by hand to check if the connection is done properly. Check if the insulation of
the wire is not interfering with the connection
-‐
Check the condition of all wiring. Animals often bite into cables and destroy them.
13.2.3
Water Level sensors (if present)
-‐
Regularly check the delivery and suction tank sensors. Failure of the sensor will be detected only after the
delivery tanks overflows which can lead to damage. If the suction sensor fails, this will damage the pump.
To check the sensor, operate them manually like water would do and check if the indicators on the ECU
front panel indicate the correct state.
