*120Kph UP...

[erick_214]

[SIZE="4"]Tanong lang mga gurus, I have a 1999 Toyota Hi-ace van subic. Ngayon pag nasa expressway ako at umabot na ng 120Kph yung takbo ko eh nawawala yung lamig ng AIRCON, parang kusang pinapatay yung compressor? Bakit kaya ganun? May prob ba compressor ng van ko?

Thanks[/SIZE]

[renzo_d10]

*120kph or more, turn off your air-con. Ganun talaga dapat.

[jick.cejoco]

[SIZE=4]Tanong lang mga gurus, I have a 1999 Toyota Hi-ace van subic. Ngayon pag nasa expressway ako at umabot na ng 120Kph yung takbo ko eh nawawala yung lamig ng AIRCON, parang kusang pinapatay yung compressor? Bakit kaya ganun? May prob ba compressor ng van ko?

Thanks[/SIZE]

if the a/c cuts out at this vehicle speed, it might be more linked to the engine speed. either the system is low on charge making the clutch cycle on and off or your compressor clutch has a speed sensor that cuts out at certain rpm. if the car engine speeds up, so does the a/c compressor and if there is insufficient charge or there is a restriction on the low side, the low pressure switch will cut clutch operation to prevent the evaporator from icing up.

[desert fox]

pacheck mo broTS ang expansion valve ng AC mo.

[airolynx]

Or baka nag hhigh pressure sir.

Golden Rule sa pag hataw: turn off a/c compressor :D

[kicks4us24]

Golden Rule sa pag hataw: turn off a/c compressor :D

parang Nitrous button lang eh yun a/c button!

hataw na!

vrrrrrooomm!!

[airolynx]

parang Nitrous button lang eh yun a/c button!

hataw na!

vrrrrrooomm!!

HAHAHAHAA!!!! Natawa naman ako dito... sa bagay pag may inoovertake ka tapos ayaw bumigay, pag pindot mo ng A/C button bigla mag ssurge yung power ng engine. Parang Nitrous nga naman! Good one kicks4us24!

[phezthie]

check freon and expansion valve, the two possible reasons..

freon, low charge
xvalve, dirty or restricted...

[erick_214]

[SIZE="4"]Elow Guyz ulet,

Well, regarding sa aircon...hindi naman mukhang kulang yung freon dahil malamig naman yug buga ng hangin kahit na tanghaling tapat eh...

Talaga bang dapat ay pinapatay yung compressor kung hahataw ng takbo? Itinanong ko kasi sa aircon shop yung sitwasyon ko ang sabi sa akin may ibang aircon talaga na ganun at baka raw sa computer box na rin...totoo kaya ito? Mayron bang nakaka-experience sa inyo ng kagaya ng sa akin?


TIA...[/SIZE]

[airolynx]

Im not sure if may comp box yung 1999 na Hi Ace. Pero from what I experienced, may pressure cut off yung compressor. So pag may konting obstruction either sa Drier or expansion valve, mas mataas yung pressure reading nya... Kaya mag ccut off sya.

[erick_214]

Im not sure if may comp box yung 1999 na Hi Ace. Pero from what I experienced, may pressure cut off yung compressor. So pag may konting obstruction either sa Drier or expansion valve, mas mataas yung pressure reading nya... Kaya mag ccut off sya.

[SIZE="4"]
Yap, may ECU yung hi-ace jap ver. Mayron nga ata pressure check switch yung AC system. So pag mataas yung RPM eh tumataas din yung pressure sa AC system? Parang protection ba ito sa compressor? Naalala ko kasi noon may luma kaming toyota 3K yung engine kahit anong apak sa gas o kahit nakarecta eh hindi naman nawawala yung lamig ng AC siguro dahil wala siyan pressure switch?[/SIZE]

[erick_214]

Elow ulet guyz...Now I'm tempted to disconnect the pressure valve switch. OK lang kaya yung disconnect ko lang sa wire?

[airolynx]

sir huwag. the pressure valve switch is there to protect your compressor. If you remove that, hindi mag ccut off yung compressor kahit excessive yung pressure. it can lead to compressor failure.

[desert fox]

Pacheck mo uli expansion valve ng AC mo.

[shadow]

tama yun post ng isang poster, nag high pressure. no need to turn off your A/C hinde naman hataw ang 120kph eh. I assume cruising ang ginagawa mo. not "hataw".

saka design naman yan kahit naka on ang A/C walang problema pag rekta ka na sa highway.

[erick_214]

tama yun post ng isang poster, nag high pressure. no need to turn off your A/C hinde naman hataw ang 120kph eh. I assume cruising ang ginagawa mo. not "hataw".

saka design naman yan kahit naka on ang A/C walang problema pag rekta ka na sa highway.

Ganito kasi nangyayari, hindi ko naman pinapatay yung AC switch eh, parang kusa lang siyang pinapatay ng kung anong switch na mayron yung van ko...

Ngayon, normal lang ba na magHIGH+PRESSURE pag nakarekta na

TIA...ulet

[phezthie]

sir, kahit hindi mo pinapatay yung main switch ng A/C, meron pa ibang safety features ang system like yung pressure switchto protect the compressor from unwarranted damage ...

pag nag high pressure, as repeatedly told, ang isa sa possibilities ay yung expansion valve... kaya its better to go to reputable shop muna and have it checked and idamay mo na yung freon baka naman kulang lang... HTH

[s_quilicot]

*120kph or more, turn off your air-con. Ganun talaga dapat.

Huh? Bakit?

[erick_214]

sir, kahit hindi mo pinapatay yung main switch ng A/C, meron pa ibang safety features ang system like yung pressure switchto protect the compressor from unwarranted damage ...

pag nag high pressure, as repeatedly told, ang isa sa possibilities ay yung expansion valve... kaya its better to go to reputable shop muna and have it checked and idamay mo na yung freon baka naman kulang lang... HTH

OK...expansion valve naman...

Tanong ko muna,,,under normal driving...ano ba ang syptoms ng may problema na ang expansion valve?

Sa pagkakaintindi ko eh, pag barado ba yung expansion valve eh tataas yung pressure around 3k rpm...tama ba ito?

TIA...

[miked]

^cyclic warm and cold air ang cicirculate if expansion valve is restricted......it can be further diagnosed with pressure readings.

the point is: go to a reputable A/c shop have your system pressure tested. Low reading (and sometimes vacuum) on the low side (evap-xvalve side) and higher than normal on the high side (compressor-condenser side) will confirm a restriction on the lines and it's usually the expansion valve. This is one of the many troubleshooting guides in A/C systems. Yours may show some other types of problems.

Re:driving modes, overspeeding the compressor in the long run will hurt it thus the reason the pressure switch (usually connected on the drier-filter) will turn off the clutch when it reaches a certain rpm...All things have their limit.