AYXP12JHRN
3 – 3
✩1—The outdoor unit restarts four times before the indoor unit error is displayed (complete shutdown).
✩2—A single error judgment results in the display of the indoor unit error (complete shutdown).
✩3—The outdoor unit restarts eight times before the indoor unit error is displayed (complete shutdown).
[2] AIR CONDITIONER OPERATION IN THERMISTOR ERROR
1. Indoor unit
26 Compressor rota-
tion error (at 120°
energizing)
Compressor stops if there is no
input of position detection signal
from compressor or input is
abnormal.
Compressor operat-
ing at 120° energizing
Operation OFF or ON Yes ✩3Yes Yes
27 Outdoor unit DC fan
error
Operation stops if there is no
input of rotation pulse signal from
outdoor unit fan motor for 30 sec-
onds.
When outdoor unit
fan is in operation
Operation OFF or ON Yes ✩1Yes Yes
28 PAM overvoltage
error
Compressor stops if DC voltage is
400 V or higher.
When in operation Operation OFF or ON Yes ✩1Yes Yes
29 PAM clock error When power source frequency
cannot be determined (at startup),
or when power source clock can-
not be detected for 1 continuous
second (at startup).
At compressor star-
tup, when in opera-
tion
Compressor contin-
ues operation with-
out stopping.
None Yes Yes
Item Mode Control opera-
tion
When resis-
tance is low
(temperature
judged higher
than actual)
Short-circuit When resis-
tance is high
(temperature
judged lower
than actual)
Open-circuit
Room tempera-
ture thermistor
(TH1)
Auto Operation mode
judgment
Cooling mode is
activated even if
room tempera-
ture is low.
Cooling mode is
activated in most
cases.
Heating mode is
activated even if
room tempera-
ture is high.
Heating mode is
always activated.
Cooling Frequency control Room becomes
too cold.
Air conditioner
operates in full
power even when
set temperature is
reached.
Room does not
become cool.
Compressor does
not operate.
Dehumidifying Room tempera-
ture memory
Frequency control
Normal operation. Room tempera-
ture is stored in
memory as
31.0°C, and com-
pressor does not
stop.
Normal operation. Room tempera-
ture is stored in
memory as
18.5°C, and com-
pressor does not
operate.
Heating Frequency control Room does not
become warm.
Hot keep status
results immedi-
ately after opera-
tion starts.
Frequency does
not increase
above 30 Hz (40
Hz).
Room becomes
too warm.
Air conditioner
operates in full
power even when
set temperature is
reached.
Heat exchanger
thermistor (TH2)
Cooling
Dehumidifying
Freeze preven-
tion
Indoor unit evap-
orator may
freeze.
Indoor unit evap-
orator may
freeze.
Compressor
stops occasion-
ally.
Compressor does
not operate.
Heating Cold air preven-
tion
Cold air preven-
tion deactivates
too soon and cold
air discharges.
Compressor
operates at low
speed or stops,
and frequency
does not
increase.
Cold air preven-
tion deactivates
too slow.
Cold air preven-
tion does not
deactivate, and
indoor unit fan
does not rotate.
Function Operation Self-diagnosis
result display
Description Detection period Reset condition Indoor
unit
error
display
Indoor
unit
Outdoor
unit
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