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+-- Thread: Looking for Advice on Rangehood connections (/showthread.php?tid=7334514)
Looking for Advice on Rangehood connections - ShopStud - 11-05-2017
Our Dacor Raised Vent RV36 (for 5 burner cooktop), mated with a CABP3 blower assembly, started making noises and working inconsistently. So I took the blower motor out and overhauled it; also changed the three rubber mounts as the old ones had melted and turned gummy. I also serviced the motor associated with the lift mechanism. This is what the raised vent looks like from above:
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRcAE2RYBX8X_rNm1QYThpykmCm2RJV_giYy8FYRmh7VLt0hvTDHg
This is what it looks like from below, with the CABP3 blower unit mounted:
https://www.goedekers.com/media/catalog/product/cache/1/image/1400x1400/9df78eab33525d08d6e5fb8d27136e95/c/a/cabp3-2.jpg
This is the exploded view of the raised vent RV36 (Page 9):
http://www.apdepot.com/images/PartsLookup/DACOR/PM_RV.PDF
And the circuit diagram may be found on Page 14.
The exploded view of the blower assembly (CABP3) is here:
https://www.searspartsdirect.com/model-number/cabp3/3262/0122700.html
When the blower assembly was out, I connected it directly to the 120 volts mains outlet and it worked perfectly at high speed, without any malfunction or vibration. Once I connected it back into the raised vent unit, it seemed to work fine at the low and medium speeds. However, if I put it into high speed, it decelerated rapidly, came to virtual halt and started humming loudly. I then measured the voltage across the motor power supply terminals (with a Fluke 115 multimeter) at each of the three speeds, while motor was connected and running. They were as follows:
Low speed - 83.8 volts
Medium speed - 99.3 volts
High speed - fluctuated wildly/rapidly between 92 and 95 volts, while motor was almost stationary and humming.
I am a bit puzzled as to why this is happening - i.e., rapidly coming to almost a complete stop at high speed setting, and why the voltage is fluctuating rapidly. What's worse is that the motor decelerates very rapidly when put on "high" and almost comes to a complete halt .... it rotates very, very, very slowly (say 45 to 50 seconds for one rotation), and the motor makes a loud humming sound. With the voltage between 92 and 95 volts, one would have thought that the blower would operate at least at medium speed. But it doesn't. It just seems to come to a near stop.
I took the capacitor out of the circuit and measured it with a Fluke 115 multimeter and it is to spec (5 micro Farads). I made sure that all wires for the blower motor (power supply connections and capacitor connections) were connected properly, as I had color coded each set of wires with different colored insulation tape while dismantling. When compared to the circuit diagram also, it was connected correctly.
The RV system has a circuit board and I think the speed is electronically controlled (triac ?). This is what it looks like:
https://www.repairclinic.com/PartDetail/Main-Control-Board/700991/1491408
Any explanation as to why it is behaving the way it is, at high speed setting. And any suggestions as to what I can try to fix the problem ? The boss is giving me a hard time and I need to have it fixed soon.
Thanks !
RE: Looking for Advice on Rangehood connections - Mr_Mike - 11-06-2017
Well, the high speed circuit is hosed. duh!
$200? Buy the board unless you're an electronics wizard. I supposed its controlled similar to a ceiling fan.
RE: Looking for Advice on Rangehood connections - doobes - 11-10-2017
(11-06-2017, 12:51 PM)Mr_Mike Wrote: Well, the high speed circuit is hosed. duh!
$200? Buy the board unless you're an electronics wizard. I supposed its controlled similar to a ceiling fan.
$139 from Amazon with shipping.