GE Industrial Solutions AF-600 FP High Power (460V_575V 150HP and above) - Manual (Page 100)

6.3.16 Input Terminal Signal Tests
The presence of signals on either the digital or analog input terminals of the frequency converter can be verified on the frequency converter display. Digital or
analog input status can be selected or read in parameters DR-60 through DR-64.
Digital inputs
With digital inputs displayed, control terminals 18, 19, 27, 29, 32, and 33 are shown left to right, with a 1 indicating the presence of a signal.
If the desired signal is not present in the display, the problem may be either in the external control wiring to the frequency converter or a faulty control card. To
determine the fault location, use a voltmeter to test for voltage at the control terminals.
Verify the control voltage power supply is correct as follows.
1. With a voltmeter measure voltage at control card terminal 12 and 13 with respect to terminal 20. The meter should read between 21 and 27 VDC.
If the 24 V supply voltage is not present, conduct the Control Card Test (6.3.17) later in this section.
If 24 V is present, proceed with checking the individual inputs as follows
2. Connect the (-) negative meter lead to reference terminal 20.
3. Connect the (+) positive meter lead to the terminals in sequence.
The presence of a signal at the desired terminal should correspond to the digital input display readout. A reading of 24 VDC indicates the presence of a signal. A
reading of 0 VDC indicates no signal is present.
Analog inputs
The value of signals on analog input terminals 53 and 54 can also be displayed. The voltage or current in mA, depending on the switch setting, is shown in line 2
of the display.
If the desired signal is not present in the display, the problem may be either in the external control wiring to the frequency converter or a faulty control card. To
determine the fault location, use a voltmeter to test for a signal at the control terminals.
Verify the reference voltage power supply is correct as follows.
1. With a voltmeter, measure the voltage at control card terminal 50 with respect to terminal 55. The meter should read between 9.2 and 11.2 VDC.
If the 10 V supply voltage is not present, conduct the Control Card Voltage Test earlier in this section.
AF-650 GP and AF-600 FP High Power Service Manual
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