SQFlex Service Instructions

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4.6.1 Trouble-shooting of a combined system
All measuring points/terminal designations in the following refer to the IO 102 breaker box.
1. Disconnect the pump
• Set the IO 102 switch to off.
• Disconnect the pump cable from the terminals.
• Disconnect plus or minus from the solar modules.
WARNING: Do not touch the wire due to high voltage.
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 (more than 10 V), or if no voltage is
measured and the wind turbine is turning, the wind turbine is faulty. Repair or replace the wind tur-
bine.
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 DC 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 ore more of the solar modules is faulty.
Replace the faulty solar module/s.
5. Check the IO 102 breaker box with solar modules connected
• 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. Reset of dry-running alarm
• Set the IO 102 switch to off.
• Reconnect the pump cable to the terminals.
• Set the IO 102 switch to 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 38 Thursday, October 1, 2009 3:27 PM