Service Manual 27
Test running
TEST RUNNING
1. Check that all tubing and wiring have been prop-
erly connected.
2. Check that the gas and liquid side service valves
are fully open.
1. Prepare remote control
Remove the battery cover
by pulling it according to the
arrow direction.
Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
Reattach the cover by
pushing it back into position.
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
• Remove the batteries from the remote control if
the system is not going to be used for a long time.
2. Settlement of outdoor unit
■
Anchor the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a concrete
or rigid mount.
■
When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
■
In the case when the vibration of the unit is con-
veyed to the hose, secure the unit with an
anti-vibration rubber.
NOTICE
3. Evaluation of the performance
Operate unit for 15~20 minutes, then check the sys-
tem refrigerant charge:
1. Measure the pressure of the gas side service
valve.
2. Measure the temperature of the intake and dis-
charge of air.
If the actual pressure are higher than shown, the sys-
tem is most likely over-charged, and charge should be
removed. If the actual pressure are lower than shown,
the system is most likely undercharged, and charge
should be added.
The air conditioner is now ready for use.
NOTICE
Bolt
Tubing connection
Outside ambient TEMP The pressure of the gas side service valve
95°F(35°C)
4~5kg/cm
2
G(56.8~71.0 P.S.I.G.)
This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the out-
door unit without loss in refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the
charge port on the gas side service valve.
2. Open the gas side service valve halfway and purge the
air from the manifold hose using the refrigerant gas.
3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the cool-
ing operation.
5. When the low-pressure gauge reading becomes 1 to
0.5kg/cm
2
G(14.2 to 7.1 P.S.I.G.), fully close the gas
side valve stem and then quickly turn off the unit. At
that time, Pump Down has been completed and all
refrigerant gas will have been collected in the outdoor
unit.
PUMP DOWN
3. Ensure the difference between the intake temper-
ature and the discharge is more than 46˚F(8°C)
(Cooling) or reversely (Heating).
4. For reference; the gas side pressure of optimum
condition is as below.(Cooling)
Discharge
temperature
Discharge air
Intake temperature
