AYXPC18LR
3 – 2
[2] CHART
Malfunction
diagnosis
indications,
descriptions,
inspection
methods
and
remedies
:Flashes
in
2-sec
intervals
(normal)
*3:
The
content
of
diagnosis
is
transferred
to
the
indoor
unit
via
serial
communication,
but
it
does
not
trigger
a
complete
shutdown
operation.
Number
of
repetition
°:
No
complete
shutdown
:O
n
:Off
:Flashes
3
times
in
0.2-sec
intervals
Status
of
indoor/ outdoor
units
Indication by
LED
on
outdoor unit
Indication
by
operation
lamp
on
indoor
unit
Content
of
diagnosis
Main
category
Sub-category
(1)
Measure
resistance
of
the
outdoor
unit
thermistor.
(2)
Check
the
lead
wire
of
the
outdoor
unit
thermistor
for
torn
sheath
and
short-cir-
cuit.
(3)
No
abnormality
found
in
above
inspec-
tions
(1)
and
(2).
(1)
Replace
the
outdoor
unit
thermistor
assembly.
(2)
Replace
the
outdoor
unit
thermistor
assembly.
(3)
R
eplace
the
outdoor
unit
control
PWB
assembly.
(1)
C
heck
the
outdoor
unit
air
outlet
for
blockage.
(2)
Check
if
the
power
supply
voltage
is
216
V
or
higher
at
full
power.
(3)
Check
the
pipe
connections
for
refriger-
ant
leaks.
(4)
Measure
resistance
of
the
outdoor
com-
pressor
thermistor.
(TH1:
Approx.
53
k
at
25ºC)
(5)
Check
the
expansion
valve
for
proper
operation.
(Temporary
stop
for
cycle
protection)
(1)
Ensure
unobstructed
air
flow
from
the
outdoor
unit
air
outlet.
(2)
C
onnect
power
supply
of
proper
voltage.
(3)
Charge
the
specified
amount
of
re-
frigerant.
(4)
Replace
the
outdoor
unit
compres-
sor
thermistor
assembly.
(5)
Replace
the
expansion
valve
coil,
expansion
valve
or
outdoor
unit
control
PWB
assembly.
(1)
Measure
resistance
of
the
heat
sink
thermistor.
(1)
Replace
the
heat
sink
thermistor.
Inspection
location/method
Remedy
Normal
Heat
exchanger
thermistor
short-
circuit
error
Outdoor
tempera-
ture
thermistor
short
circuit
error
Suction
thermistor
short
circuit
error
Compressor
high
temperature
error
Temporary
stop
due
to
compressor
dis-
charge
overheat
*3
(Temporary
stop
for
cycle
protection)
Temporary
stop
due
to
outdoor
unit
heat
exchanger
overheat
*3
(Temporary
stop
for
cycle
protection)
Temporary
stop
due
to
indoor
unit
heat
exchanger
overheat
*3
(Temporary
stop
for
parts
protection)
Temporary
stop
due
to
IPM
overheat
*3
IPM
high
temper
-
ature
error
Lighting
pattern
at
the
time
of
timer
lamp
lighting
Off
for
5
seconds
Operation
lamp
Cluster
lamp
Outdoor
unit
thermistor short-circuit
Cycle
tempera-
ture
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Operation
lamp
Cluster
lamp
Indoor/ outdoor
units
in
operation
Normal
flashing
1
time
2
time
Indoor/ outdoor
units
in
complete
shutdown
Indoor/ outdoor
units
in
complete
shutdown
Indoor
unit
in
operation Outdoor
unit
in
temporary
stop
Main
category
Sub
category
Malfunction
No.
00
10
2
20
30
1
2
3
4
5
1
(Temporary
stop
for
cycle
protection)
Temporary
stop
due
to
dehumidi-
fying
operation
*3
Dry
operation
Operation
lamp
Cluster
lamp
3
time
