32
33
8.4.9 Auto-Restart function
The indoor unit is equipped with an auto-restart function, which
is carried out through an auto-restart module. In the case of a
sudden power failure, the module memorizes the set conditions
before the power failure. The unit will resume the previous
operation settings (not including swing function) automatically
after 3 minutes when power returns.
If the previous condition was forced cooling mode, the unit will run
in cooling mode for 30 minutes and turn to auto mode as 24°C
set temperature.
There is a one (1) minute delay for the compressor to restart if
power to the unit is switched off accidentally before turning the
mains off. For other conditions, the compressor will have a three
(3) minute delay when restarting.
8.4.10 Ionizer function (optional)
The indoor unit is equipped with an Ionizer, which is controlled
by the CLEAN AIR button on the remote control. When the unit is
turned on, press the CLEAN AIR button to activate the function.
Press it again to stop the function. During the time that the Ionizer
is controlled by remote control, the Ionizer will be turned off
automatically if the indoor fan stops running due to a malfunction
or anti-cold-wind. When the indoor fan restarts after a malfunction
has been rectifi ed and anti-cold-wind has been released, the
Ionizer option will be available again.
8.4.11 function (optional)
is a device that ionizes the air through positive and
negative high voltage electrodes operating simultaneously.
When the positive ions and negative ions are neutralized they
release tremendous amounts of energy which sterilize the air
passing through and alter the structure of any resident bacteria.
The residual negative ions not only eliminate odour, dust, smoke
and pollen particles in the air, but also bring a fresh and healthy
sensation to the user - just like being in a forest or standing close
to a waterfall. This function is available only when the unit is on
using the remote control. After the unit has been turned on, the
function is switched on when the user presses the ”clean
air” button on the remote control. Pressing the button again will
switch off the ionizer function. The function only works
when the indoor fan motor is running. If the indoor fan motor is
off, the also stops working even though the
function is available.
P.S. The function cannot be used at the same time as the
Ionizer function.
8.4.12 8°C Heating (optional)
When using the heating function, the preset temperature of the
air conditioner can be as low as 8°C, which keeps the room
temperature steady at 8°C and prevents household things
freezing when the house is unoccupied for a long time in severe
cold weather.
9. TROUBLESHOOTING
9.1 Indoor Unit Error Display
Display
LED STATUS
E0
EEPROM parameter error
E1
Indoor/outdoor units communication protection
E2
Zero-crossing signal error
E3
Indoor fan speed out of control
E5
Open or short circuit of outdoor temperature sensor or outdoor unit
EEPROM parameter error
E6
Open or short circuit of room or evaporator temperature sensor
E7
Outdoor fan speed out of control
P0
IBM malfunction or IGBT over-strong current protection
P1
Over voltage or too low voltage protection
P2
Temperature protection of compressor top
P4
Inverter compressor drive error
Note:
E4 & P3: Reserved function.
9.2 Diagnosis and Solutions
9.2.1 EEPROM parameter error
Turn off the power supply and turn
it back on 5 secs later
Is the EEPROM chip plugged into
the indoor PCB properly?
Replace the main PCB for the
indoor unit
Fix the connection
The problem returns
No
Yes
E963_Lennox Luna Inverter Service Manual 4.indd 32-33
E963_Lennox Luna Inverter Service Manual 4.indd 32-33
2/02/12 10:13 AM
2/02/12 10:13 AM
