Pioneer WAE009AMFI15RL, Service Manual

Page: 28 / 65

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2. Refrigerant charging
Procedure:
1). Connect the charge hose to the charging
cylinder, open the 2-way valve and the 3-way
valve
Connect the charge hose which you
disconnected from the vacuum pump to the
valve at the bottom of the cylinder. If the
refrigerant is R410A, make the cylinder upside
down to ensure liquid charge.
2). Purge the air from the charging hose
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).
3) Put the charging cylinder onto the electronic
scale and record the weight.
4). Open the valve (Low side) on the charge set
and charge the system with liquid refrigerant.
ASSURE TO CHARGE a little at a time
(approximately 150g or 5 Ounces each time),
while operating the air conditioner in the cooling
cycle; wait approximately 1 minute in between
each charging load and then repeat the
procedure.
5).When the electronic scale displays the
proper weight, disconnect the charge hose from
the 3-way valve’s service port immediately
If the system has been charged with liquid
refrigerant while operating the air conditioner,
turn off the air conditioner before disconnecting
the hose.
6). Mount the valve stem caps and the service
port. Use torque wrench to tighten the
service port cap to a torque of 18N.m. Be sure
to check for gas leakage.