GE AF-650 GP Operating Instructions Manual page 82

Check 4: Inverter Cabinet and Rectifier Cabinet Door Fans
This checks the wiring between the Inverter Module and the Cabinet Door Fans. All three door fans are controlled from Inverter Module number 2 (middle inverter
module in 62/64 drive or right inverter module in 61/63 drive).
1. Unplug the 10-pin connector from the top of Inverter Module number 2. Read the terminals on the wire harness side of the connector (male connector).
Measure between pins 5 and 10. Should read approximately 16 Ω.
2.
Incorrect reading
An incorrect reading could indicate a failed fan or a bad wire harness.
To check fans
1. Disconnect the wiring from the fan terminals.
Read across the fan terminals on each fan. A reading of approximately 47 Ω is expected.
2.
Replace any defective fans and repeat the test.
Reconnect the 10-pin connector on top of Inverter Module number 2.
Check 5: Rectifier Heat Sink Fan and Option Cabinet Door Fan
1. Unplug the 10-pin connector from the top of Inverter Module number 1. Read the terminals on the wire harness side of the connector (male connector).
If unit size 61 or 62 Drive (no option cabinet), measure between pins 5 and 10. Should read approximately 21 Ω.
2.
If unit size 63 or 64 Drive (with option cabinet), measure between pins 5 and 10. Should read approximately 15 Ω.
3.
Incorrect Reading
In incorrect reading could indicate a failed fan or a bad wire harness.
1. Perform the Heat Sink Fan Ohm test on the Rectifier Module.
2. If unit size 63 or 64 (with option cabinet), perform the Option Cabinet Door Fan test.
3. If the above checks do not identify the problem, remove the faulty Rectifier Module and check the connections between the connectors on the top of
the module and the power card. If these connections are the problem, replace and retest the fan continuity.
If the above checks do not identify the problem, replace the wire harness between Inverter Module number 1 and the Rectifier Module. Reconnect the 10-pin
connector on top of Inverter Module number 1.
Check 6: Heat Sink Fan Ohm Test
Check the resistance of the heat sink fan on each module.
Rectifier Module
1. Unplug the 8-pin connector from the top of the Rectifier Module. Read the terminals on the Rectifier Module side of the connector (female connector).
Measure between pins 1 and 4. Should read approximately 21 Ω.
2.
Inverter Module
1. Unplug the 10-pin connector from the top of each Inverter Module. Read the terminals on the Inverter Module side of the connector (female connector).
Measure between pins 5 and 10. Should read approximately 21 Ω.
2.
Incorrect Reading
An incorrect reading would indicate either a defective heat sink fan or defective wiring to the fan.
Follow the instructions for removing the heat sink fan. Make the following measurements on the connector leading to the fan
Measure between pins 1 and 2. Should read approximately 21 Ω.
1.
Measure between pins 1 and 3. Should read approximately 45 Ω.
2.
Measure between pins 2 and 3. Should read approximately 68 Ω.
3.
4. Measure between pins 1 and 4. Should read open.
5. Measure between pins 2 and 4. Should read open.
6. Measure between pins 3 and 4. Should read open.
High Power Service Manual for Unit Sizes 6x
6
81