Installation manual

MonoSolar & Solar Panels Installation Manual Page 20 of 29
8.2 Fault Diagnosis
Condition Diagnosis/ Comment
1. The display does not
give any indication in
sunny periods.
a) Ensure healthiness of electrical supply
b) Disconnect the electrical supply, remove the cover and
check:
• The 3.15A fuse (20x5mm)
• The electrical connections to the power supply
and/or display
• The solar panel sensor and wiring
2. The MonoSolar does
not start operating
even though the sun
shines and the display
works.
The display indicates the tank temperature. The
temperature of the panel is equal or lower than the
temperature of the water in the tank. If this is not the case:
a) Disconnect the appliance, remove the cover/lid and
check:
• The cable to the pump has not been connected.
• The wiring of the pump is defective.
b) The pump is defective and needs to be replaced.
c) The appliance has just been connected and meanwhile
the appliance reached a temperature over a 100
0
C. The
appliance will cool down by short periods of circulation at
intervals until it has reached the right temperature.
3. You hear the sound
of dripping water in the
tank.
a) In case the solar system has just started to operate, wait
until the pump speed has come down and listen again.
b) Check the filling level of the tank as described in
‘Inspection and Maintenance’ (section 8.1).
c) Check if there is a leakage in the solar panel circuit.
4. You can hear the
pump running.
Whenever the temperature increases, the pump speed will
increase. This is audible.
5. The panel ‘whistles’
whenever the pump is
running.
Disconnect the electrical supply when the solar panel is
cool and allow the panel to drain. Disconnect the flow pipe
from the panel. Remove the washer from behind the
reducer. Clean/clear the hole.
6. The temperature on
the display does not
change while the
MonoSolar has been
operating for a number
of hours.
a) The tank heat sensor is not operating. Disconnect the
appliance, remove the cover/lid and check:
• The connector from the sensor is not connected
or is defective.
• The display is defective.
b) There is no circulation through the solar panel:
• The pipes to and from the panel are too long.
• The height of the top of the panel is greater than
the maximum allowed (see Fig 5.3 & 5.4).
• The panel flow and return pipe are not in copper
8mm and 10mm OD pipes respectively.
d) The solar panel is frozen up:
• The flow and/or return pipes are not insulated
properly.
• The solar panel is not level on the roof.