If compressor only is running and fan is stationary
At the compressor check that 240v is available to the fan. If 240 volts are available
check for electrical continuity from the compressor to the fan.
If 240 volts are available check the blade for free rotation.
If the fan still does not operate, change the motor.
If the compressor remains stationary whilst the fan is running
Check that the wiring is correct and power is available to the compressor.
Check the compressor windings, remove the relay and thermal trip unit and test for
continuity across the main windings, pins A and C, a reading of 37.6 ohms should be
achieved.
Test for continuity across the start windings, pins A and B. a reading of 26.4 ohms
should be achieved. finally test all three pins for leakage to earth.
Failure of any of the above tests indicates a defective compressor and the unit should be
returned for repair.
If the compressor windings are proved correct the fault lies within the overload/thermal
trip/ptc assembly. This is non serviceable and should be replaced.
If the compressor has failed on over-temperature, the unit should be allowed to cool for 15-20
minutes prior to reconnecting power supplies.
Summary of Contents for FORMATIC D12,000
Page 23: ...10 WIRING DIAGRAMS...
Page 24: ......
Page 25: ......
Page 26: ......
Page 28: ......
Page 31: ...12 Dolomite AB Water chiller Installation and Instruction Manual...
Page 39: ...Dolomite AB water chiller top assembly exploded view...