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Help did some test to see if the motherboard is bad or the condenser fan motor, here are the results.

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Old 07-28-2011, 12:24 PM
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Default condenser fan spins very slow
Model Number: PFS22SISBSS   Brand: GE   Age: 1 - 5 years   

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Help
did some test to see if the motherboard is bad or the condenser fan motor, here are the results. J2 and pin 8- 13.64VDC
J2 and pin 4-10.8 VDC
J2 and pin 3- 13.64 VDC
J2 and pin 5- 3.8 VDC
what is bad? the condenser fan motor or the motherboard?


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  #2 (permalink)  
Old 07-28-2011, 01:02 PM
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Quote:
Originally Posted by joenkathy View Post
Help
did some test to see if the motherboard is bad or the condenser fan motor, here are the results. J2 and pin 8- 13.64VDC
J2 and pin 4-10.8 VDC
J2 and pin 3- 13.64 VDC
J2 and pin 5- 3.8 VDC
what is bad? the condenser fan motor or the motherboard?
JoenKathy,

Thanks for all the readings and information, Great job.

Everything is in prescribed range, except J2 pin 5. I'd expect a higher DC voltage reading, but the voltage does fluctuate up and down.

"J2 5 VDC Output to condenser fan for motor operation. Effective voltage is
determined by pulse width modulation."

Try this test before you replace the "motherboard".

J2 pin 5 to pin 3 = 10.5 VDC (high), 7.5 VDC (med), 5.5 VDC (low).

Good Luck,
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Old 07-29-2011, 04:31 AM
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Default Ge Model # Pfs22sisbss

Thanks Joe M. APP TEAM, for the info, confused about the next test you want me to perform, you put J2 pin 5 to pin 3. Do I use J2 as the common (ground) and the red lead on pin 5, 4, & 3? Or am I using a jumper lead for pin 3-5. Please clearify. Thanks again for your help.
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Old 07-29-2011, 07:14 AM
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Quote:
Originally Posted by joenkathy View Post
Thanks Joe M. APP TEAM, for the info, confused about the next test you want me to perform, you put J2 pin 5 to pin 3. Do I use J2 as the common (ground) and the red lead on pin 5, 4, & 3? Or am I using a jumper lead for pin 3-5. Please clearify. Thanks again for your help.

JoenKathy,

You're going the be testing across the two pins, on the board/in the J2 connector.

Example :

Main Control Board J2 Connector(low-voltage DC Side)

J2 pin2(blue/white wire) to J2 pin3(white/silver wire) = 12 VDC

Once you have determined the two pin locations, disconnect the J2 wire harness from the board, put your meter probes on the two separate pins and check for voltage. You can also insert the end of the meter probe, into the connector from the wire insertion side, if the probes are small enough.

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Old 07-29-2011, 10:59 AM
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Thanks for the help.
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Old 07-29-2011, 11:24 AM
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Quote:
Originally Posted by joenkathy View Post
Thanks for the help.

You're welcome,

You'll have it figured out and repaired in no time.

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Old 05-02-2012, 07:15 PM
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Default My condenser fan runs very slowly also.

My condenser fan runs very slowly also. It is on a GE GBS22HCRAWW bottom mount freezer refrigerator.

I get similar readings (although I'm not sure what your other probe is contacting).

I measured from the back of the plug connected to the motherboard's J2 socket with the fridge running. Measured between pin 3 (FAN COM) and all the other wires.

J2: 3-8 (Wh-Rd) = 14.0V Supply
J2: 3-5 (Wh-Pk) = 3.3V Cond Fan
J2: 3-4 (Wh-Yl) = 13.2 Evap Fan
J2: 3-1 (Wh-Bl) = 6.6 Evap RPM

The 3-8 reading is in spec, but I've found conflicting info on weather the pin 3-5 reading indicates a motherboard problem. One source indicates that a ~4 V reading on fixed speed fan models indicates a motherboard problem. Another source indicates that only the pin 3-8 supply voltage is important and that for this case the fan is the problem.

The original poster here did not follow up with their outcome.

Can any kind experts or the OP help me out?

Thanks in advance,
Michael
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Old 05-03-2012, 06:43 AM
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Quote:
Originally Posted by m_p_v_13 View Post
My condenser fan runs very slowly also. It is on a GE GBS22HCRAWW bottom mount freezer refrigerator.

I get similar readings (although I'm not sure what your other probe is contacting).

I measured from the back of the plug connected to the motherboard's J2 socket with the fridge running. Measured between pin 3 (FAN COM) and all the other wires.

J2: 3-8 (Wh-Rd) = 14.0V Supply
J2: 3-5 (Wh-Pk) = 3.3V Cond Fan
J2: 3-4 (Wh-Yl) = 13.2 Evap Fan
J2: 3-1 (Wh-Bl) = 6.6 Evap RPM

The 3-8 reading is in spec, but I've found conflicting info on weather the pin 3-5 reading indicates a motherboard problem. One source indicates that a ~4 V reading on fixed speed fan models indicates a motherboard problem. Another source indicates that only the pin 3-8 supply voltage is important and that for this case the fan is the problem.

The original poster here did not follow up with their outcome.

Can any kind experts or the OP help me out?

Thanks in advance,
Michael
Michael,
Disconnect and test the condenser fan motor resistance, there should be a reading of 1.5 to 3.0 ohms resistance.

Your "Motherboard" should be supplying 13 VDC to the condenser fan motor if its a single speed motor and 9 VDC in the slo speed winding. Check the voltage at the "motherboard" with the fan motor disconnected, that way if the motor is bad, we're not getting a false reading, due to the "drag" .

Good Luck and Thanks
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