Re-Installation While The Outdoor Unit Need To Be Repaired; Evacuating The Entire System; Refrigerant Charging - Pioneer YN018GMFI16M2D Service Manual

6.7 Re-installation while the outdoor unit
needs to be repaired

1. Evacuating the entire system

Procedure:
1). Confirm that both the 2-way and 3-way valves
are set to fully opened position.
2). Connect the vacuum pump to 3-way
valve's service port.
3). Evacuate for approximately one hour.
Confirm that the low side pressure gauge
indicates -0.1Mpa (14.5 Psi).
4). Close the valve (Low side) on the
charging set, turn off the vacuum pump
and confirm that the gauge needle does
not move (within approximately 15 minutes
after turning off the vacuum pump).
5). Disconnect the charging hose from the
vacuum pump.

2. Refrigerant charging

Procedure:
1). Connect the charging hose to the
charging cylinder, open the 2-way valve
and the 3-way valves.
Connect the charging hose which you
disconnected from the vacuum pump to the valve
at the bottom of the cylinder. If the refrigerant is
R410A, set 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 an electronic
scale and record the weight.
4). Open the valve (Low side) on the charge
set and charge the system with liquid
refrigerant
If the system cannot be charged fully with the
specified amount of refrigerant, or can only
be charged with little amount at a time,
(approx. 150g (5 Ozs) each time), while
operating the air conditioner in the cooling
cycle, wait approx. 1 minute 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 cap. Use torque wrench to
tighten the
service port cap to a torque of 18N.m. Be
sure
to check for gas leakages.