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Model NR-B30FX1 is same as a NR-B30FW1 with a Inverter Compressor with a Inverter PCB that supplies power to the control PCB and Front Display Board. There is no cooling Fridge or Freezer, lights are on, display on but compressor and internal cooling fan in Freezer (FCC) not running normally.
On power up both Fans operate on power up, 3 way valve makes a noise, damper step motor does a cycle, but no noise on the compressor, and a blip of voltage/frequency on the outputs from inverter board to Compressor (terms W, V and U)
Checked Main and Inverter PCB test point voltages and okay, checked sensors/thermisters in cct and out of cct appear okay.
I have measured the compressor windings on Con703, and all appear good at 7.8 Ohms, and meggered them to Eth and no issues. I have on my multimeter with a KHz frequency setting but only see a brief flash of Hz on each terminal of three W,U &V), and flash of voltage, not enough to prove consistency and it’s not continuous. Power chip on Inverter PCB not hot and it’s a (IPM700) SLA6805M.Got hold of the service manual and performed the diagnostic checks with no fault showing and not on history either. On Power up cycle the internal fans work (Freezer FC and Fridge PC). The Compulsion FC start function- s/c Test Terminal 1 & 3, starts both Fridge (PC) Fan and Freezer (FC) Fans. The s/c Test 0 (Zero) Point and Gnd does not start the Compressor but the ‘C’ indication comes on the front panel. Should this start the compressor ?
Could do with a component cct diagram or how to prove the main PCB is telling the Inverter chip to fire up the compressor.(Connecter Con4 to Con704 with 5 wires).
Now stuck any advice welcome please ?
Re: Panasonic Fridge Freezer inverter NR-B30FX1 not cooling
I meant to mention that the Compressor is not getting warm but did read constant 15.4V AC across a pair of the three Compressor terminals U to V then U to W and finally V to W. This would increase to 21V when the internal Freezer Fan (FC) briefly kicked in on power up sequence, then fell back to 17.9V. Is this enough voltage or the correct voltage to start the compressor or I should be reading 200+ Volts ?
Re: Panasonic Fridge Freezer inverter NR-B30FX1 not cooling
Checked all voltages on boards, and swapped out Main Control Board, checked thermisters/sensors and okay but can’t find the sensor -ATC, for ambient room temperature to check it ?
Thinking it’s the compressor ? So checked the three windings and all good 7.8Ohms and no connection to Eth. Managed to get spare correct spec Panasonic compressor but not fitted, just connected the U,V&W three pin lead on to it and eth and no pipes connected. When power up refrigerator the Compressor does actually run for 2 seconds then stops, would of thought it would of ran for some time. Is this normal that it will stop after a few seconds and shut down as its not connected to the pipes. Does this prove the old compressor is faulty or it’s something else ? Any advice please ?Hi I just wanted to provide the outcome of the fault for anyone having the same problem. I actually bought a broken same model fridge and through elimination and measuring voltages worked out that it was the compressor at fault. I stood the fridge upside down trick but didn’t work. By gentle rubber hammer knocking on the compressor it actually burst into life. It only lasted a week and failed. It was for me sadly uneconomical to replace the compressor and the second hand fridge had exactly same fault. New fridge freezer Samsung and sold the two for parts on ebay.
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