Editing Argon supply voltage troubleshooting
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Inrush current limiter is based on a resistor which is bypassed by a [[GraniteCore]] controlled relay after HV DC supply has risen near nominal levels. | Inrush current limiter is based on a resistor which is bypassed by a [[GraniteCore]] controlled relay after HV DC supply has risen near nominal levels. | ||
− | Verifying internal [[HV DC bus]] voltage can be done by reading the voltage value from Granity Testing tab | + | Verifying internal [[HV DC bus]] voltage can be done by reading the voltage value from Granity Testing tab or by measuring DC voltage between VP and VN terminals. |
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==Checking for AC to HV DC signal path components== | ==Checking for AC to HV DC signal path components== | ||
{{Electricshock|Before proceeding with the tests, make sure drive has been safely discharged for at least 15 minutes before opening it. Any remaining voltage in the device may interfere the measurements here. See more info [[Power supply safe discharging|here]].}} | {{Electricshock|Before proceeding with the tests, make sure drive has been safely discharged for at least 15 minutes before opening it. Any remaining voltage in the device may interfere the measurements here. See more info [[Power supply safe discharging|here]].}} | ||
===STO1=== | ===STO1=== | ||
− | Applying 24V voltage to STO1 inputs causes the STO relay to emit a relay | + | Applying 24V voltage to STO1 inputs causes the STO relay to emit a relay click sound. If there is no sound, then the reason is related to STO1 relay or it's control. |
===Fuse F1=== | ===Fuse F1=== | ||
Open drive case and check conductivity of fuse F1. See [[Replacing Argon fuse]]. | Open drive case and check conductivity of fuse F1. See [[Replacing Argon fuse]]. | ||
===Inrush current limiter resistor R7=== | ===Inrush current limiter resistor R7=== | ||
− | R7 is a 5W | + | R7 is a 5W 33 ohm resitor that conducts current to charge bulk capacitors. After capacitors are charged to full, relay RL2 is closed to allow high current flows. |
− | Resistance of R7 can be measured with multimeter from test points marked in the image. The correct reading is | + | Resistance of R7 can be measured with multimeter from test points marked in the image. The correct reading is 33 ohm +/- 2 ohm. |
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[[File:Argoninrushlimiter.jpg|thumb|Resistor R7 measurement points inside Argon]] | [[File:Argoninrushlimiter.jpg|thumb|Resistor R7 measurement points inside Argon]] | ||
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===AC/DC rectifier bridge B3=== | ===AC/DC rectifier bridge B3=== | ||
Measuring condition of B3 is possible with multimeter's diode check function. Check all four diodes from the test points marked in the image. Multimeter red lead goes to anode and black to cathode. All diodes should give reading of 0.4 to 0.5 Volts. | Measuring condition of B3 is possible with multimeter's diode check function. Check all four diodes from the test points marked in the image. Multimeter red lead goes to anode and black to cathode. All diodes should give reading of 0.4 to 0.5 Volts. | ||
[[File:Argondiodebridge.jpg|thumb|Diode bridge B3 measurement points circled]] | [[File:Argondiodebridge.jpg|thumb|Diode bridge B3 measurement points circled]] | ||
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