Specifications

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<Abnormality detected during unit operation: Indoor unit>
Abnormal-
ity display
P1
P2
Meaning of abnormality display and
abnormality troubleshooting
Intake sensor abnormal
1) If thermistor open or short is de-
tected and the compressor enters
the 3 minutes restart prevention
mode and does not return to nor-
mal after 3 minutes, an abnormal-
ity is recognized.
(If returned, returns to normal op-
eration.)
2) Always detected during cool, dry,
and heat operations.
Short: 90 °C or higher
Open: –40 °C or lower
Piping sensor abnormal
1) If thermistor short or open is de-
tected and the compressor enters
the 3 minutes restart prevention
mode and does not return to nor-
mal after 3 minutes, an abnormal-
ity is recognized.
(If returned, returns to normal op-
eration.)
2) Always detected during cool, dry,
and heat (except during defrost-
ing) operation.
Short: 90 °C or higher
Open: –40 °C or lower
Cause
1 Thermistor characteristics faulty.
2 Connector contact faulty.
(Insertion faulty)
3 Thermistor wiring open or contact
faulty.
4 Indoor controller board faulty.
1 Thermistor characteristics faulty.
2 Connector contact faulty.
(Insertion faulty)
3 Thermistor wiring open or contact
faulty.
4 Faulty refrigerant circuit, etc. has
caused thermistor temperature to rise
to 90 °C or higher or drop to –40 °C
or lower.
5 Indoor controller board faulty.
Judgment method and remedy
1-3
Check thermistor resistance value
0 °C ...... 15.0 kΩ
10 °C ........ 9.7 kΩ
20 °C ........ 6.4 kΩ
30 °C ........ 5.3 kΩ
40 °C ........ 3.1 kΩ
Open or faulty contact can be detected
by applying force (pulling, bending) to
lead wire while measuring thermistor re-
sistance.
2 Check for connector faulty contact.
After reinserting connector, turn on
power and recheck operation.
4 Check remote controller room tempera-
ture display.
If there is a difference between actual
room temperature and displayed room
temperature after checking that there
are no problems at 1-3, replace indoor
controller board.
If there are no problems above, there
are no abnormalities.
Turn power off and on and operate.
1-3
Check thermistor resistance value.
For characteristic, see above (P1).
2 Check for connector faulty contact.
After reinserting connector, turn on
power and recheck operation.
4 Operate in trail run mode and check pip-
ing temperature with remote controller.
When piping temperature is abnormally
low (cooling) or high (heating), refriger-
ant circuit is probably faulty.
5 Check test run mode piping tempera-
ture with remote controller.
If there is a difference between actual
piping temperature and displayed pip-
ing temperature when there are no ab-
normalities at 1-4, replace indoor con-
troller board. If there is no problem
above, there are no abnormalities.
Turn on power and operate.