ge inverter board model# pfsf5njwabb

[pallanesfour]

what in the world is the inverter board by the compresser what does it do and how can i tell if its bad or becoming a proplem? ive never seen one of these


pfsf5njwabb




GE Refrigerator Inverter Board Assembly Part # WR55X10855

[JWWebster]

In the name of energy conservation Brainiacs have decided to use a variable speed dc compressor which ranges from 200 VDC to 10 or 15 VDC when the machine is in vacation mode. When you want a quick chill the compressor ramps up to move the freon faster. When nobody is around and the doors are not being opened as often as it is during regular everyday use, it shuts down into a slumber using minimal power to maintain temps.

[pallanesfour]

how do i know if this thing is dead or dying and needs service and or attention?

[AJ]

What is all wrong with the refrigerator?
How old is this refrigerator?

Seems the inverter, part # WR55X10855 is NLA, no longer available.

[pallanesfour]

the compliant is that she heard a humming noise but no click after the noise. which wouldve led me to  the the realy if there was a hunmming then a click the compressor was very hot to the touch so i cleaned the famous round condensor. does the ge board in back make a humming noise when its dying  i didnt see any burn marks on it or burnt smell on the board the compressor was on all the time i was there and the temp was 22-42 and going down to normal this was yesterday so far she hasnt called me back.what to do?

[pallanesfour]

does anybody know the anser to these question 

[pallanesfour]

does any body know what the symptoms are when this inverter board is going out or is dead what can i look for?

[AJ]

Never worked on one like this myself. Maybe another tech will have some answer for the both of us.

[JWWebster]

Get the board of there and look for signs of a solder failure near the compressor relay on it. I soldiered one back once and made the compressor start working. been working every since:

[pallanesfour]

im talking about the inverter board not the control board 

[JWWebster]

Hope I never see one of em.

[Joebeef]

From the service manual....hope this helps.

The inverter receives 120 VAC line-in from the power
supply. Orange and brown wire. The inverter converts this single-phase, 60
Hz, 120 VAC into 3-phase, 240 VAC, with frequency
variations between 57 Hz and 104 Hz. This voltage
is delivered to the compressor through 3 lead wires.
Each wire will carry identical voltage and frequency.
Note: The compressor leads must be connected to
measure voltage output. If the compressor wires are
not connected, or if an open occurs in one of the 3
lead wires or in the compressor, the inverter will stop
voltage output.

When checking inverter voltage output, connect
the test-meter leads to any 2 of the 3 compressor
lead wires at the inverter plug (plug should be
connected). The same reading should be measured
between any 2 of the 3 wires.
The inverter controls compressor speed by
frequency variation and by Pulse Width Modulation
(PWM). Changing frequency and PWM will cause
an effective voltage between 80 and 240 VAC to be
received at the compressor.
• Low speed (1710 rpm) - 57 Hz
• Medium speed (2100 rpm) - 70 Hz
• High speed (3120 rpm) - 104 Hz
The inverter receives commands from the main
control board. The main control board will send
a PWM run signal from the J15 connector of 4-6
VDC effective voltage to the inverter (all wires must
be connected). The inverter will select compressor
speed (voltage output) based on this signal.
The main control board will only send a run signal to
the inverter when the compressor should be on.
Note: When measuring signal voltage (from the
main control board) at the inverter, a reading of 4-6
VDC will be measured with all wires connected. If the
inverter wiring is disconnected, the board output will
measure between 10-12 VDC.
The inverter will monitor compressor operation and
if the compressor fails to start or excessive current
draw (4 amps maximum) is detected, the inverter
will briefl y stop voltage output. The inverter will then
make 12 consecutive compressor start attempts
(once every 12 seconds). After 12 attempts, if the
compressor has not started, an 8-minute count
will initiate. After the 8-minute count, the inverter
will attempt to start the compressor again. If the
compressor starts, normal operation will resume.
If the compressor fails to start, this process will be
repeated. Removing power to the unit will reset
the inverter count. When power is restored, the
inverter will attempt to start the compressor within
8 minutes.
The inverter has a built-in circuit protection to
guard against damage from a failed or shorted
compressor. However, if a failed compressor is
diagnosed, order a new compressor and inverter.
If the compressor fails to start after replacement,
replace the inverter.

[niobrara]

Ohm your compressor all winding should ohm the same. If they do make sure you have power going to the invertor board, if you do replace invertor board if compressor fails to start.

[pallanesfour]

in lay mans terms WHAT!!

[JWWebster]

Is  their 2 pins on the compressor on this model? Ohm them 2 pins to see if you have continuity is what I would do.