LG FMN0760NL, Service Manual

Page: 68 / 122

- 68 -
6. Test Running
1. Check that all tubing and wiring have been properly
connected.
2. Check that the gas and liquid side service valves are
fully open.
(1) Prepare remote controller
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.
NOTE:
• Use 2 AAA(1.5volt) batteries. Do not use rechargeable
batteries.
• Remove the batteries from the remote controller if the
system is not going to be used for a long time.
(2) Precautions in test run
■
The initial power supply must provide at least 90%
of the rated voltage.
Otherwise, the air conditioner should not be operat-
ed.
■
For test run, carry out the cooling operation firstly
even during heating season. If heating operation is
carried out firstly, it leads to the trouble of compres-
sor. Then attention must be paid.
■
Carry out the test run more than 5 minutes without
fail. (Test run will be cancelled 18 minutes later
automatically)
■
The forced operation is started by pressing button
for 2 seconds. (Cassette Type)
The test run is started by pressing button for 5 sec-
onds. (Cassette Type)
The test run is started by pressing timer cancel but-
ton five times continuously. (Room type)
■
To cancel the test run, press any button.
(3) 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 conveyed to
the hose, secure the unit with an anti-vibration rubber.
(4) Evaluation of the performance
Operate unit for 15~20 minutes, then check the system
refrigerant charge:
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and discharge
of air.
3. Ensure the difference between the intake temperature
and the discharge is more than 8°C (Cooling) or
reversely (Heating).
Bolt
Tubing connection
Discharge
temperature
Discharge air
Intake temperature
Thermometer
Discharge
temperature
Discharge air
Intake temperature
R
Thermometer