18
Alpha SolarSmart 150 - Commissioning
5.3
TURN ON THE ELECTRICAL SUPPLY
1.
Check that all the wiring has be correctly installed and that all the terminal connections are tight.
2.
Switch on the electrical supply and the display (see Fig. 21) will show 'A1' and start to countdown from eighty to zero. During
this countdown the PCB does a self-diagnosis of all the sensors and pumps. If the collector temperature is between 10 and
130°C the drain back unit pump will run for a short period to run a test program, after which the system is ready for use.
3.
When all the self-diagnostic procedures have been completed, the display will flash between the solar cylinder
temperature and the operation mode.
4.
If there is enough solar light at the collector the cylinder pump will run, shortly followed by the drain back unit pump. The
drain back unit pump runs at full speed for 250 seconds to purge any air from the collector then it modulates to its
optimum speed for the collector temperature.
5.4
DISPLAY - Fig.21
The controls of the solar cylinder are able to indicate working modes on the display. The push button provides the
means to operate the cylinder. During normal operation the system can be turned on and off using the button. When the
button is held in for 5 seconds the diagnostic mode will be entered. Refer to Section 7. If the button is not touched for 5
seconds, the last mode will become active.
Display shown
Display explained
The indicates the operating mode of the solar system, on or off (o
n
or oF).
If oF is shown the solar system is not operating, press the button to change from off to on.
Note: Always leave the system on
This is the temperature of the domestic hot water (°C) in the solar cylinder.
When the system is on and working, the display will alternate between the domestic hot
water temperature (for 4 seconds) and the operating mode (o
n
or oF for 2 seconds).
This is the temperature of the domestic hot water (°C) in the solar cylinder.
The flashing dot in the right hand corner of the display shows that the drain back unit pump
and cylinder pump are running.
This is the temperature of the domestic hot water (°C) in the solar cylinder.
The flashing dot in the middle of the display shows that only the cylinder pump is running.
Flashing fault codes (71 to 84). Refer to Section 7 for a list of fault codes and possible
solutions.
Complete the details of the boiler installation in the Checklist in Section 12.
Fig. 21
Display
Push button
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