AFD FAN

[puckman]

Replaced a fan and starting capacitor in a afd because of a f31 fault [cooling fan]. Now after replacing cap and fan and running after a few minutes I get a F14 Fault whitch is heatsink temp. or air restriction. After thinking about this and not being able to see which way fan was spinning , is it possible fan is running in reverse ? Wll changing cap leads change rotation? Or is F- 14 Fault just a new job?

 

[mike_kilroy]

sounds like it might be wrong direction. yes, try reversing.

no, reversing cap will not reverse direction. from another post:

In a standard FHP capacitor-start motor, there are two pairs of leads, the motor-run leads and the motor-start leads. All you need to do to reverse the direction of the motor is reverse the polarity of one pair.

 

[Jraef]

Replaced a fan and starting capacitor in a afd because of a f31 fault [cooling fan]. Now after replacing cap and fan and running after a few minutes I get a F14 Fault whitch is heatsink temp. or air restriction. After thinking about this and not being able to see which way fan was spinning , is it possible fan is running in reverse ? Wll changing cap leads change rotation? Or is F- 14 Fault just a new job?

Your post has some conflicting information. "Starting capacitor" is a term for a cap used in a single phase motor to make it begin turning.

Use of the term AFD and reference to the "fault codes" makes me think you are talking about the heat sink cooling fan on an Adjustable Frequency Drive, is that right? If so, the fans are generally DC powered, so yes, their direction of rotation would be polarity dependent so if you connected the wires backward, the fan would turn, but in the wrong direction so it would suck not blow (or vice versa). Capacitors in a VFD are not "starting" capacitors though. They are DC bus capacitors. And if you hooked one of those up backward, all the magic smoke would escape.

If AFD meant something else to you and it is a Cap start single phase motor, then if it is a reversible motor, you may have connected the wrong wire to the capacitor. No idea where you would get fault codes on a single phase motor though.

 

[puckman]

Jraef, Let me try to start at the begining . replaced internal cooling fan and starting capacitor [ listed in company parts list] because of a [f32] cooling fan fault, stated in keypad. Turned unit on and after say 10 minutes got a f 14 fault which is listed as heatsink temp. My thinking was maybe fan was running in reverse, cannot see what direction fan was turning and though if i reversed capacitor leads it might reverse fan direction , just a guess.

Eaton [C H ] svx 9000 drives , their calling cap a starting capacitor in the parts list and i assume to call it the same. It also uses a driver board for fan motor.
What type of cap i don't know. Do you feel reversing cap wires will change rotation? . Thank you guys

 

[Jraef]

Jraef, Let me try to start at the begining . replaced internal cooling fan and starting capacitor [ listed in company parts list] because of a [f32] cooling fan fault, stated in keypad. Turned unit on and after say 10 minutes got a f 14 fault which is listed as heatsink temp. My thinking was maybe fan was running in reverse, cannot see what direction fan was turning and though if i reversed capacitor leads it might reverse fan direction , just a guess.

Eaton [C H ] svx 9000 drives , their calling cap a starting capacitor in the parts list and i assume to call it the same. It also uses a driver board for fan motor.
What type of cap i don't know. Do you feel reversing cap wires will change rotation? . Thank you guys

Sounds as though maybe it is a really big drive that has a large AC powered blower motor then? If so, it's not the cap wires that you reverse, it is the cap connection to the windings that you swap. If it is a conventional single phase cap start motor, single voltage, then you swap the connections to wires 5 and 8. For example if you have 4-8 and 1-5, connect it 4-5 and 1-8. If it is a dual voltage motor there is a little more to it, but ut still boils down to swapping the 5 and 8 wires.

 

[puckman]

We cleaned the heatsinks in drive [ rated for 150hp] and plan on reinstalling fan tomorrow. Fan is pretty much concealed once installed and cannot se e rotatation , we think a plate that acts as a funnel for air flow might have jammed fan causing fan not to turn. We will redo in morning. thanks to all for help, again. great forum.

 

[mike_kilroy]

sounds like it might be wrong direction. yes, try reversing.

no, reversing cap will not reverse direction. from another post:

In a standard FHP capacitor-start motor, there are two pairs of leads, the motor-run leads and the motor-start leads. All you need to do to reverse the direction of the motor is reverse the polarity of one pair.

So, if fan was not mechanically stopped due to ductwork as you say may be, then swapping the leads as above will reverse direction.

 

[puckman]

That is the question i have been trying to get a definite answer to . Can switching cap wire change rotation of motor , so far the answer is "no". We will install this fan unit again today . We tested fan wired to drive but not installed and fan function fine , test only for about a minute to confirm driver board and cap all worked together. The work area can not be reached by hand to try to spin motor . To do this drive will have to be removed from cabinet and placed on a work bench and that will be the last resort.
Will let people know tonight how things went.

 

[puckman]

Everything worked out great today putting fan back into drive. Made one small adjustment with a small opening for my fingers to get to fan and make sure it is free and can turn without any restriction. Drive has been runing all day. No I did not reverse cap wires.
Thank you all again for your help.