Filter
Top Products
– 55 –
Check
code
[P04]
Outdoor
LED display
<DCheck and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is. (1) high-pressure SW system error,
(2) power supply error (Vdc), (3) high-pressure protective operation.
[High pressure SW system error]
Power supply error (Vdc), High pressure protective operation.
z
z
{
Connection of connectors,
outdoor P.C. board,
Fan motor, Wiring.
Is circuit wiring normal?
Is there no fan breakage
or coming-off?
Is service valve fully opened?
Does cooling outdoor fan
normally operate?
B Cooling operation.
B ← Cooling operation
C ← Heating operation
Doesn’t high pressure switch
operate?
Are parts of
high pressure switch normal?
Reset the power supply and
then do a test operation according
to the season.
Is there any element
which blocks heat exchanger
of the outdoor unit?
Clogging of heat exchanger
Short circuit
Parts check
Defective → Replace
Elimination of
blocking element
Check outdoor PC board
Defective → Replace
Wiring check,
Correct.
Open service valve fully.
Repair defective position.
Overcharge of refrigerant/
Clogging/Pipe breakage/
Abnormal overload
YES
YES YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
NO
Are characteristics
of TC and TCJ sensor
resistance value normal?
Are connections of
connectors,capacitors
and fan motor normal?
Heating operation
Does the heating indoor fan
normally operate?
Clogging by refrigerant
overcharge/Pipe breakage/
Abnormal overload
Is there any element which
blocks indoor heat exchanger?
Filter clogging
Clogging of heat exchanger
Short circuit
Elimination of
blocking element
Repair
defective position.
Replace
TC or TCJ sensor.
Check indoor P.C. board
Defective → Replace
YES
YES
YES
NO NO
YES
NO
NO
C