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2.3 Indoor checking
No. Parts Items Estimation standard
1
Electronic
expansio
n valve
If the EEV has no
response, or can not
close fully, can not
open
When all indoor in cooling mode, EEV all
open to 480 or close to min, check the
dip switch if SW08-7 is “off”
2 sensor
if the coil sensor is
inserted conversely
or with wrong
resistance value,
select to test ambient
temp. by wired
controller or by indoor
resistance value of indoor gas
TC1( three cores, green), liquid pipe
TC2 (3 cores, black) is 10KΩ ( 25)
3 fan
When the unit is
running, if the voice is
normal
Check and resolve the problem
4 PCB
check if the
communication is
normal, and if the
wire is connected
reliably
confirm indoors in one system are
electrified accordantly, signal wire
shielded layer of all indoor and outdoor
units is connected together, and
grounding on outdoor at single point
4 Air duct
If the flap can open
and close normally, if
the duct unit has air
return duct
Check and resolve the problem
Part 2
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