Dometic BUTTNER MT150PP Instructions De Montage Et De Service page 24

Troubleshooting
10 Troubleshooting
Fault
The solar charge controller does
not work.
The solar charge controller does
not work. The "Standby" LED is
flashing.
The solar charge controller does
not work. The "Laden" LED
flashes once before the solar
charge controller switches to
standby mode ("Standby" LED is
flashing).
Unusually long charging time.
The "Laden" LED is flashing
quickly.
24
Possible cause
Insulation faults, breaks or loose
connections at the live cables.
Short circuit has been generated.
No solar panel power is generated. The solar charge controller automati-
The generated solar power is too
low. Objects or dirt are blocking
out light at the solar panels.
Reverse polarity protection.
Over voltage protection. Solar
panel voltage (VoC) too high
(> 28.0 V).
High temperature protection: The
solar charge controller switches to
reduced charging voltage
(12.75 – 13 V) when the tempera-
ture of the battery exceeds the cut-
off value (> 50 °C).
Low temperature protection: The
solar charge controller switches to
reduced charging voltage
(12.75 – 13 V) when the tempera-
ture of the battery drops below the
cutoff value (lead batteries:
< –30 °C, LiFePO4 batteries:
< –20 °C).
MT150PP, MT230PP, MT350PP, MT550PP
Solution
➤ Check live cables for insulation
faults, breaks or loose connec-
tions.
➤ If you cannot find an error, con-
tact an authorized service agent.
The device fuse must be replaced by
an authorized service agent after it
has been triggered by excess cur-
rent.
cally switches to standby mode at
night.
➤ Check for obstructions and
ensure that the solar panels are
not blocked by shadows.
➤ Remove any dirt.
➤ Check the right polarity of the
solar panel wiring.
➤ Check the solar panel voltage
(VoC). Reduce the number of
connected solar panels if neces-
sary.
The solar charge controller returns
automatically to full charging voltage
when the temperature drops to the
restart value
(< 48 °C).
The solar charge controller returns
automatically to full charging voltage
when the temperature exceeds to
the restart value (> 22 °C).
EN