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Pressure by pressure gauge (Check joint)
Pressure indication by LED
Output power of I/F (CDB) P.C. board
If
and
,
and
are different,
an error of the pressure sensor is considered.
If
and
are different, check P.C. board.
Check miss-wiring, wrong installation and connection of connector.
(Using miss-wiring check function of the outdoor unit, check them.)
Is blocking found in entire valve?
Are connection of connectors
and coils normal?
A Cooling
B Heating
Is outdoor PMV normal?
Is SV2 circuit normal?
Does cooling
indoor fan normally operate?
Refrigerant shortage, clogging
or pipe breakage is considered.
Is there clogging of
outdoor heat exchanger?
Does heating outdoor fan
normally operate?
Is there clogging of indoor filter
or heat exchanger?
In cooling season, go to A .
In heating season, go to B .
Are the pressure
sensor characteristics of
low pressure normal?
Isn’t any indoor unit
which has different refrigerant
system connected?
Are gas pipe, liquid pipe
and service valve of the
outdoor unit fully opened?
Are parts related to the
indoor fan motor normal?
1. Connection of connector
2. Capacitor
3. Motor 4. Fan
Open the service valve fully.
Replace low pressure sensor.
Correct SV2 circuit.
Correct wiring to regular wiring.
Shortage of
refrigerant/blocking/pipe breakage
Repair the
defective position.
Check indoor P.C. board
Defective → Replace
Check outdoor P.C. board
Defective → Replace
Repair the
defective position.
Repair the
defective position.
Replace PMV
with new one.
Cleaning
Cleaning
Is indoor fan
system normal?
· Fan breakage
· Fan coming-off
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO NO
NO
NO
NO
NO
Check
code
[H06]
[L10]
Outdoor
LED display
<Display 1> <Display 2>
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¡
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ll
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<Display 1> <Display 2>
¡¡
¡
l
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¥
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l
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ll
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Low pressure protective operation]
[Unset model type]: Only when service P.C. board is used
Cut jumper line according
to the explanation sheet packaged
with the service P.C. board.