Phoenix Contact UM IA RAD-SOL-SET-24 Serie Manual De Instrucciones página 155

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8.6.3 Load operating error
1. Check whether voltage is present at the load.
Check whether the fuses of the system have failed.
The SunSaver charge controller does not contain any fuses or circuit breakers.
2. Check whether the load and the other connections on the charge controller and battery
have been connected correctly.
Make sure that the voltage drops in the system wiring are not too high.
3. Check whether the LEDs of the SunSaver charge controller indicate the correct state.
If the red "LOAD DISCONNECT" LED is on, the load has been disconnected because
the battery voltage was low. This is normal if the load requires more power than
provided by solar panels due to poor weather or sunlight conditions.
4. Measure the voltage at the BATTERY terminal blocks of the charge controller. Current
should be present for the load if this voltage is above the value for low voltage
disconnection.
Measure the voltage at the LOAD terminal blocks of the charge controller. If no voltage
is present, the charge controller may possibly be damaged.
8.6.4 System frequently switches to the LVD
(low voltage disconnection) state
If the system switches to the LVD state too often, the daily current draw may exceed the
solar system output power. Recalculate your load requirements (see example on page 1-8).
If the recalculation shows that the solar system is not large enough, batteries with a higher
capacity or a larger solar panel can be used.
Please contact the technical support team at Phoenix Contact if the result of the calculation
shows that the size of your solar system is not sufficient. They will inform you whether it is
possible to expand the components in order to increase the output power of your solar
system.
The battery has a service life of 2 to 4 years depending on the regular extent of discharge
and ambient temperatures. A typical indication of declining battery capacity is the load
working during the day but not at night. In this case, the battery voltage drops down to the
LVD (low voltage disconnection) setpoint at night and then increases above this value
during the day with the solar charging current.
You will also see evidence of this during the day if you turn on and off the solar panels. If the
voltage falls rapidly with the solar panels off, and then rises rapidly when turned on it is time
to replace the batteries.
Spare batteries are available from Phoenix Contact (see "Ordering data" on page 10-4).
Charge controller
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