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Accessing Installer Mode
It will be necessary to switch to Installer mode if the system needs to operate in Heating Only or Cooling Only
modes, or the Pump Down procedure needs to be performed. Installer Mode can be accessed one of two
ways:
Installer Mode Method One (1):
1. Supply power to the system.
2. Reset the system by simultaneously pressing the Reset button and the "A" button on the handheld control-
ler. A very slender tool is needed to access the Reset button.
3. Release the buttons. The display on the handheld controller changes to "00".
4. Set the code by pressing the Up and Down Temperature buttons. The Up Temperature button changes the
code on the ten (10) digit; the Down Temperature button changes the code on the one (1) digit. See the
"Setting the Cooling Only / Heating Only Modes" table below for the code numbers.
5. Press the ON / OFF button to save the mode. When the mode is saved, the system will beep.
6. Press reset again to return to a user mode, and turn the power off to the system.
7. Wait approximately thirty (30) seconds, and then turn the power back on to the system. The system will
operate in the selected mode.
To Cancel Installer Mode Method One (1):
Follow steps above, but use the cancel code numbers in the "Canceling the Cooling Only / Heating Only
Modes" table below.
Table 23: Setting the Cooling Only / Heating
Only Modes.
Mode
Code Number
Cooling
Heating
• After the Cooling Only mode is set, Heating and Auto Changeover functions cannot be used.
• After the Heating Only mode is set, Cooling, Dehumidification, and Auto Changeover functions cannot be used.
• After a mode is canceled, the system will return to normal operation.
•
Modes cannot be set when the system is operating. The system must be completely OFF before any mode can be set.
• If a mode is NOT set when the system is OFF, that mode will not operate.
• During Heating Only Mode, if the system is turned OFF when the handheld controller is set to a function other than Heating / Fan mode, the
system will not turn back on. Turn the system OFF first, set the handheld controller to Heating / Fan mode, and then turn the system back
ON.
• WLAN Module's communication time will lag by about one (1) minute after unit is turned back on, and in normal operating mode.
• Entire lock or Mode lock cannot be set if heating or automatic operation is set through a central controller.
FINAL INSTALLATION PROCEDURES
Table 24: Cancelling the Cooling Only / Heating
Only Modes.
45
Cooling
47
Heating
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Mode
Code Number
46
48
Installer Modes
Figure 123: Installer Mode
Method One (1).
Step 2.
TEMP
A
SET UP
Reset
Step 3.
Step 4.
10 digits
TEMP
1 digit
Step 5.
ON/OFF
A
67
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