SQFlex Service Instructions

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1.5.1 Trouble-shooting

1. Find out if the problem is mechanical or electrical.

• Propeller cannot turn = Mechanical problem, see Mechanical problems on page 20

• Propeller turns slowly = Electrical problem, see Electrical problems on page 21

Electrical problems may be in the wind turbine or the IO 102 breaker box. Determine which as follows:

2. Disconnect the three wires from the wind turbine one at a time at the IO 102 breaker box. If the propel-

ler starts, the wire that allowed it to start leads to a defective rectifier in the IO 102 breaker box. Replace

the breaker box, see Overview of possible system combinations on page 26

3. If the propeller still does not start, the problem is in the tower wiring or the wind turbine.

4. The propeller is running, but may have an electrical problem. Using a voltmeter, read the voltage

across the leads and see the list below as a guide to possible problems.

• The voltage increases and decreases slowly with wind speed and equally across all wires = Every-

thing OK.

• No voltage across two wires = One wire from wind turbine is not carrying power. Check in order:

-the tower wiring to ensure it is properly wired.

-slip rings and brushes,

-stator connections and stator windings for obvious damage.

• The voltage is significantly higher across two wires than the others = Contact the distributor or the fac-

tory.

• Voltage is produced even after ON/OFF switch is activated = Possibly a faulty ON/OFF switch or a

wire has been short circuited to the other two wires or an internal fault has occurred in the IO 102

breaker box.

• The voltage is significantly lower across two wires than the others = Bad connection at the wind tur-

bine voltage connections or faulty stator winding.

5. Should these steps not solve the problem, proceed directly to Electrical problems on page 21

Wind turbine power outpout

Instantaneous speed

1000

800

600

400

200

5 10 15 20 25 30 35 40 mph

2.3 4.5 6.8 9.0 11.3 13.5 15.8 18.0 m/s

Instantaneous Wind Speed

Power Output (W)

Whisper 200

sqflex_SI_US_WG.book Page 19 Thursday, October 1, 2009 3:27 PM