FXLQ20~6 FXNQ20~63P2VEB
VRV System air conditioners
4P323720-1 – 2012.06
Installation and operation manual
10
Test operation
Refer to the installation manual of the outdoor unit.
The operation lamp of the remote controller will flash when an error
occurs. Check the error code on the liquid crystal display to identify
the trouble.
If any of the items in following table are displayed on the remote
controller, there may be a problem with the wiring or power, so check
the wiring again.
Maintenance
How to clean the air filter
Clean the air filter when the display shows "
" (TIME TO CLEAN
AIR FILTER).
Increase the frequency of cleaning if the unit is installed in a room
where the air is extremely contaminated.
If the dirt becomes impossible to clean, change the air filter. (Air filter
for exchange is optional.)
1
Remove the air filter.
For
FXLQ
units
For
FXNQ
units
2
Clean the air filter.
Use vacuum cleaner (A) or wash the air filter with water (B).
When the air filter is very dirty, use soft brush and neutral
detergent.
Remove water and dry in the shade.
3
Fix the air filter.
4
After turning on the power, press FILTER SIGN RESET button.
The "TIME TO CLEAN AIR FILTER" display is turned off.
Error code
Meaning
A8
Error in power supply to indoor unit
C1
Transmission error between fan driver PCB and controller
PCB of the indoor unit
C6
Improper combination of fan driver PCB of the indoor unit or
setting failure in control PCB type
U3
Test operation of the indoor unit has not been finished
Error code
Meaning
There is a short circuit at the forced off terminals (T1, T2)
U4
or
UH
- The power on the outdoor unit is off
- The outdoor unit has not been wired for power supply
- Incorrect transmission
no display
- The power on the indoor unit is off
- The indoor unit has not been wired for power supply
- Incorrect transmission wiring, forced off wiring or remote
controller wiring
Caution
Only a qualified service person is allowed to perform
maintenance.
Before obtaining access to terminal devices, all power
supply circuits must be interrupted.
Do not touch the internal parts during and immediately
after operation.
Your hands may suffer burns if you touch the internal
parts. To avoid injury, give the internal parts time to
return to normal temperature or, if you must touch
them, be sure to wear proper gloves.
Do not use water or air of 50°C or higher for cleaning
air filters and outside panels.
Do not wash the air conditioner with water.
Doing so may result in an electric shock.
Do not operate for many hours with opened windows.
This may cause condensation.
Do not stand or place objects on the air conditioner.
This could result in injury due to falling or turning over.
Do not place containers with water on the air
conditioner.
If the containers are turned over, the water could
result in equipment failure or electric shock and fire.
Do not operate the unit with the control panel lid open.
If water gets inside the panel, it could result in
equipment failure or electric shock.
If the main power supply is turned off during
operation, operation will restart automatically after the
power turns back on again.
(A) Using a vacuum cleaner
(B) Washing with water
