SQFlex Service Instructions

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4.5.1 Trouble-shooting of a wind-powered system with CU 200 control unit and level switch
1. Check the system by means of the CU 200
If the CU 200 indicates fault, proceed according to section Trouble-shooting by means of CU 200 on
page 10.
2. Disconnect the pump
• Switch off the pump by pressing the ON/OFF button at the CU 200. The OFF light must be on.
• Disconnect the pump cable from the terminal J2.
3. 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 18
.
The three values measured must be identical. If they differ, or if no AC voltage is measured and the
Propeller is turning, the wind turbine is faulty. Repair or replace the wind turbine.
4. Check the IO 102 breaker box
• 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 18
.
If no DC voltage is measured and the Propeller is turning, the breaker box is faulty. Replace the
breaker box.
5. Check the level switch in the water reservoir
• Disconnect the level switch cable from the terminal J5 in CU 200.
• 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.
6. Check the CU 200 control unit
• Let the level switch remain disconnected.
• Measure the DC voltage across the terminal for the pump (J2) in CU 200.
The value must correspond to the value measured under step 4.
If the value differs, the CU 200 is defective. Replace the CU 200.
7. 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.
• Switch on the pump by pressing 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 36 Thursday, October 1, 2009 3:27 PM