Installer Mode, Heating Only Mode - LG LS090HSV5 Installation Manual

FINAL INSTALLATION PROCEDURES

Installer Mode, Heating Only Mode

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.
To Enter Installer Mode:
1. Press the Reset and "A" buttons. A very slender tool is needed to access the Reset button.
2. Set the code by pressing the Up and Down Temperature buttons, and then press the ON / OFF
button. The Up Temperature button changes the code on the ten (10) digit; the Down Temperature
button changes the code on the one (1) digit.
Enabling Heating Only Mode
To be able to run Heating Only mode, the unit must be changed to
Installer mode (see above page for instructions).
1. Supply power to the system, but system must be OFF with all
functions inactive.
2. Enter the Installer mode.
3. Set code to 47.
4. Press the ON / OFF button and select the code number 47. Unit
will beep to acknowledge that the code has been received.
5. Turn off power for a minimum of 30 seconds.
6. Turn power back on to system.
• After the Heating Only mode is set, Cooling, Dehumidification, Auto Changeover modes cannot be used.
• After Heating Only mode is disabled, system operation will return to normal.
• Codes cannot be entered when the system is operating. The system must be OFF to enter the codes. Even if the code is entered when the
system is ON, the function won't operate.
• During Heating Only Mode, if the system is turned OFF when the handheld controller is used to set the system to operate in modes other than
Heating or Fan, the system will not turn back On. Turn the system OFF after the handheld controller is used to system the system to Heating
or Fan, and then turn back ON.
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Disabling Heating Only Mode
1. Supply power to the system, but system must be OFF with all
functions inactive.
2. Enter the Installer mode.
3. Set code to 48.
4. Press the ON / OFF button and select the code number 48. Unit
will beep to acknowledge that the code has been received.
5. Turn off power for a minimum of 30 seconds.
6. Turn power back on to system.
Figure 89: Using the Handheld Con-
troller to Change System to Installer
Mode.
SETUP
Press