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Only for training and service purposes
LGE Internal Use Only
Checking Key Components of Unit
1.4 Remote Controller
To solve various troubles while using control panel, please read following FAQ (Frequently Asked Questions).
For your convenience, all questions are classified according to topics.
No Topic Question Answer
1
2
3
Power button does
not bright
Some icons are dis-
played automatically
Water tank heating
or related features
are not permitted
System installation is fin-
ished. Also, all wirings
including power connection
is all right. But when the
power button in front of the
control panel is pushed, it
does not bright.
Although nobody touched
control panel, someties it
displays specific icons and
the system operates auto-
matically.
Setting water tank temper-
ature is not permitted
although the water tank is
installed.
• There can be a problem in wiring between PCB
and control panel. Open control box and find
ʻCN_REMOʼ connector at the PCB. If the connector
is empty or nothing is connected, please connect it
with end of wire which is from control panel then
restart the system.
• Check if external controller is connected like ther-
mostat. If thermostat is connected to the system
and it is configured exactly, you can see
ʻThermostat Icon ( )ʼ at the display of the con-
trol panel. It is normal condition that power button
of control panel does not work when thermostat is
installed.
• It is normal condition. Basically, two features can
be operated without userʼs decision – one is sys-
tem protective operation, the other is ʻbackground
water tank heating operationʼ, which is heating
inside the water tank while space heating is not
used or the system is not working. System protec-
tive operation is, as letter says, for the purpose of
securing the system from worse condition. Anti-
freezing operation, for example, is one of the pro-
tective operation. It is essential to start protective
operation to prevent potential malfunction and to
keep possible accidents. On the other hand, back-
ground water tank heating operation is not protec-
tive operation but to supply warm water to end-
user. The background water tank heating operation
is only started when the water tank temperature is
under the specific temperature.
Following two conditions should be satisfied.
• Check if ʻWater tank enable/disableʼ button is cor-
rectly pushed or not. To use water tank, end-user
must push button and highlight icon.
Otherwise, water tank heating is disabled.
• Also, check if DIP switch setting is correct or not.
To identify the DIP switch setting, open the control
box inside the unit. Unless 2nd and 3rd pin of DIP
switch setting is 01(OFF-ON) or 10(ON-OFF), the
water tank heating will not be configured.
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