Inverter compressor not pumpming

[RBM]

Hello I have a Fujitsu Inverter compressor which I think is in efficient - haven't had this happen before - system runs at 16 degrees C at R410a suction temp/press, on closing liquid line took a long time to only reach 25 psi (175 kpa) suction pressure. Is this a proper test for an inverter style compressor? -has anyone encountered this before?
any help appreciated

[bigor_2]

Pls, specify a model name of unit.

[install monkey]

should be able to pull a 10 inch vac, within 2 mins if the lp switch is linked out and the liq valve isnt passing

[RBM]

Thanks install monkey, do you generally replace inverter PC when replacing compressor?
Hi bigor the mod no. is AOT45LJBYL
Thank you

[install monkey]

check with fujitsu- some say as long as the 3 outputs are even, - then theres no need to replace it- as your compressor does start, then no need, if the compressor went down to earth or was siezing then your putting more strain on the inverter,
http://www.mediafire.com/view/6696s1...ng%20Guide.pdf
click on the link above for tayters guide for inverter checking- he also has a 24hr helpline as he can be found posting on here at 2am uk time!

warranty can be limited to 6mths if inverter not changed with some manufacturers

[Brian_UK]

Not sure myself but would an inverter pump down on its own?

[install monkey]

PUMP DOWN (Refrigerant collecting operation)
Perform the following procedures to collect the refrigerant when moving
the indoor unit or the outdoor unit.
(1) Press the push-button switch on the circuit board once.
The LED on the circuit board starts flashing (one second ON/one se-cond
OFF). This indicates the start of PUMP DOWN operation.
When the switch is pressed while the compressor is in operation, PUMP
DOWN operation starts automatically.
When the switch is pressed while the compressor is in stop, the com-pressor
starts to operate automatically, and then move on to PUMP
DOWN operation.
(2) PUMP DOWN operation continues for about 1 minute. When PUMP
DOWN operation is completed, the compressor stops automatically.
Then close the 2-way valve and 3-way valve immediately.
(3) Turn the power off.

[install monkey]

http://www.mediafire.com/view/02xk31.../Manual(3).pdf
similar service manual- click on link above- aota 30lbtl

[bigor_2]

Sorry, I just to understand all this topic. You need to use advice of install monkey for compression test.
And no good idea if you simple to close service valve then compressor is start.

[RBM]

Thanks for your advice, much appreciated.

[Tayters]

Bear in mind if you have the metal body fan motors they are reknowned for taking out PCB's left right and centre. If finances allow get the newer white plastic body motors.

Cheers,
Andy.

[Brian_UK]

Bear in mind if you have the metal body fan motors they are reknowned for taking out PCB's left right and centre. If finances allow get the newer white plastic body motors.

Cheers,
Andy.

Not really related to this thread methinks?

[Tayters]

Not related to a non pumping compressor but related to the power surging through the unit when the isolator gets turned back on and a diode in the fan motor goes skew whiff and wrecks 2 other boards and you end up looking a bit of a plum.

[install monkey]

is that tayters floggin them fujitsu fan motors again! by means of subliminal messages haha

[Tayters]

is that tayters floggin them fujitsu fan motors again! by means of subliminal messages haha

Ha, me kpi's need a boost!