SQFlex Service Instructions

40 / 60
4.7.1 Trouble-shooting of a combined system with CU 200 control unit and level switch
Measuring points/terminal designations in the following refer to the IO 102 breaker box or
the CU 200.
1. Disconnect the pump
• Set the IO 102 switch to off.
• Disconnect plus or minus from the solar modules.
WARNING: Do not touch the wire due to high voltage.
• Disconnect the pump cable from the terminal J2.
• Release the wind turbine by setting the IO 102 switch to on.
2. Check the wind turbine
• Measure the AC voltage across the terminals for the wind turbine, i.e. one measurement between each of the
three phases.
U = 0-250 VAC. The voltage depends on the wind speed, see Wind turbine on page 24
.
The three values measured must be identical. If they differ, or if no voltage is measured and the wind turbine is
turning, the wind turbine is faulty. Repair or replace the wind turbine.
3. Check the IO 102 breaker box with wind turbine connected
• Measure the DC voltage across the terminals for the CU 200 in the breaker box.
U = 0-300 VDC. The voltage depends on the wind speed, see Wind turbine on page 24
.
If no voltage is measured and the wind turbine is turning, the breaker box is faulty. Replace the breaker box.
4. Check the solar modules
• Disconnect the three wires from the wind turbine one by one and short-circuit all three wires to each other in
order to stop the turbine.
WARNING: Do not touch the wire due to high voltage.
• Reconnect the wire from the solar panel which was disconnected under step 1.
• Measure the DC voltage and short-circuit DC current across the terminals (2T1, 4T2).
See electrical connection in Section 1.4.
If the DC voltage or DC current is outside the range, one or more of the solar modules is faulty. Replace the
faulty solar module/s.
5. Check the IO 102 breaker box with solar modules
• Connect the solar modules by setting the IO 102 switch to on.
• Measure the DC voltage and short circuit DC current, across the terminals for the pump.
The values must correspond to the values measured under step 4.
If the values differ, the breaker box is defective. Replace the breaker box.
6. Check level switch in the water reservoir
• Release the wind turbine by setting the IO 102 switch to on.
• Disconnect the level switch cable from the terminal J5.
• Measure the disconnected level switch cable with an ohmmeter.
• Turn the level switch upwards => the contact in the level switch is closed. The measured value must be approx.
0 Ω.
• Turn the level switch downwards => the contact in the level switch is open. The measured value must be ∞ Ω.
If one of the two values is not correct, the level switch is defective. Replace the level switch.
7. Check the CU 200 control unit
• Let the level switch remain disconnected.
• Measure the DC voltage across the terminals for the pump (J2).
The value must correspond to the value measured under step 3 or 5.
Note: The sun and wind conditions may have changed since the measurements in point 3 or 5 were made
If the value differs, the CU 200 is defective. Replace the CU 200.
8. Check the pump
• Make sure that CU 200 is set to off by pressing ON/OFF button. The OFF light must be on.
• Reconnect the pump cable to the terminal J2.
• Connect the level switch cable to the terminal J5.
The level switch must point downwards to send a starting signal to the CU 200.
• Press the ON/OFF button the on light must be on.
Note that the dry running sensor is covered with water.
If the pump starts, it was stopped due to dry running and has now been reset.
• Wait five minutes.
If the pump does not start, it is defective. Repair or replace the pump.
sqflex_SI_US_WG.book Page 40 Thursday, October 1, 2009 3:27 PM