sounds like your thermistor input circuit is bad. most thermistors, NTC & PTC, have switch point or knee around a couple k; most drives have set point around 3-10k -- anything above is good, below bad -- or vice versa. none will have switch point over 100k. thermostats of course are 0 ohms or open so setpoint still set around 1k to trip. if you can go 1-400k then input is prob bad - unless your thermistor is a special one that is semiconductor based and polarity sensative like a KTY unit - then your pot will not simulate it correctly.
Thread: Yaskawa Varispeed 626VM3 Help
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06-19-2012, 11:46 PM #1
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06-20-2012, 04:17 PM #2
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Thank you Mike! I guess I kinda figured it was bad. I just wanted to confirm what I was thinking. Do you recommend anyone to fix this for me?
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03-17-2014, 09:50 PM #3
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The serial control cable was frayed and caused the fault. It also burnt out the FSSB.
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