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6-3
PURGING PROCEDURES · LEAK TEST
PURGING PROCEDURES
Connect the refrigerant pipes (both the liquid pipe and the gas pipe) between the indoor and the outdoor
unit.
Remove the service port cap of the stop valve on the gas pipe side of the outdoor unit.
(The stop valve will not work in it initial state fresh out of the factory (totally closed with cap on).)
Connect the gauge manifold valve and the vacuum pump to the service port of the stop valve on the gas
pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gauge manifold valve, then close the gauge manifold valve and stop the vacuum
pump.
Leave as it is for one or two minutes. Make sure the pointer gauge manifold valve remains in the same
position. Confirm that the pressure gauge shows –0.101 Mpa [Gauge] (–760 mmHg).
Close
Stop valve
Open
Hexagonal wrench
Remove the gauge manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves on both sides of gas pipe and
liquid pipe.
Operating without fully opening lowers the performance and this causes trouble.
Pipe length up to 7 m
No gas charge is needed.
Tighten the cap to the service port to obtain the initial status.
Tightening torque
N·m
kgf·cm
Cap for service port
13.7 to 17.7
140 to 180
Cap for stop valve
19.6 to 29.4
200 to 300
* Remove the GUARD before air purge, and
reinstall the GUARD after servicing.
Stop valve
Gauge manifold valve
(Liquid)
Hexagonal
wrench
Charge
hose
Vacuum pump
Pipe length exceeding 7 m
Charge the prescribed
amount of gas. (refer to 3)
Retighten the cap
Leak test
6-4
TEST RUN
• Before performing the test run, recheck for any wrong wiring.
Wrong wiring prevents normal operation or results in blown fuse disabling operation.
• The test run can be initiated by using EMERGENCY OPERATION switch (press button switch). The EMER-
GENCY OPERATION switch is pressed, the unit will start the test run (continuous operation) for 30 minutes
in COOL MODE or HEAT MODE, depending on which mode is selected. During this 30 minutes a thermostat
does not work. After 30 minutes the unit will start the EMERGENCY OPERATION at fixed temperature
setting of 24°C in COOL MODE or HEAT MODE.
• Perform test run in the following procedure.
PROCEDURE
• Press the EMERGENCY OPERATION switch.
1 Press it once, and the EMERGENCY COOL
MODE starts.
If the left side lamp of the operation indicator blinks
every 0.5 seconds, inspect the in/out connecting wire
A for mis-wiring.
2 Press it once more, and the EMERGENCY HEAT
MODE starts.
3 Press it once more, and the operation stops.
GUARD*
Service port
(The operation mode changes in order of 1 - 3
Stop valve (Gas)
every press of the EMERGENCY OPERATION
switch.)
Caps
Checking the remote (infrared) signal reception
Press the ON/OFF button on the remote control and check that an electronic sound is heard from the indoor
unit. Press the ON/OFF button again to turn the air conditioner off.
If the indoor unit is operated with the remote control, both the trial and emergency operations are released
by commands from the remote control.
• Once the compressor stops, the restart preventive device operates so the compressor will not operate for 3
minutes to protect the air conditioner.
13
EMERGENCY OPERATION switch
Operation indicator
Mode
lamp
1
COOL
(Light)
(Off)
HEAT
2
(Off)
(Light)
3
STOP
(Lights not turn on)
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