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TROUBLE DIAGNOSIS
Items
Precautions
4,Vacuum degessing.
5,Refdgerant
charging.
Evaporator
Suctionpipe
[_
Compressor
Dr_er
BLue
pr
hut e
Pipe Connection
Connect a red hose to the high pressure side and a blue hose to the
low pressure side.
Vacuum Sequence
Open (_. (_) valves and evacuate for 40 minutes. Close valve O.
Red
KEYPOINTING
- If power is applied
dudng vacuum
degassing, vacuum
degassing shall be
more effective.
- Operate compressor
while charging
refrigerant.
(it is
easier and more
certain to do like
this.)
Charging sequence
1) Check the amountof refrigerantsuppliedto each model after completing vacuum
degassing.
2) Evacuate bombe with a vacuum pump.
3) Measure the amount of refrigerant charged.
- Measure the weight of an evacuated bombe with an electronic scale.
- Charge refrigerant
into a bombe and measure the weight. Calculate the weight of
refrigerant charged into the bombe by subtracting
the weight of an evacuated
bombe.
- ndicate the weight of
an evacuated bombe
KEYPOINTING
- Be sure to charge
the refrigerant at
around 25°C.
- Be sure to keep -5g
in the winer and
+5g in summer
Calculation
of amount of refrigerant
charged
]
the amount of refdgerant charged= a weight after charging -
a weight before charging (a weight of an evacuated cylinder)
- 96 -
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