130
[P04] * Any of the following abnormality may occur.
Seeing the LED on the outside board can determine which abnormality occurs.
1.High pressure sensor activated.
2.Power source failure (Vdc)
3.Hi pressure protection operation
4.Case thermostat operation
[High pressure SW operation]
Power supply error (Vdc), High pressure protective operation, Case thermostat operation.
Check code
Outdoor LED
indication
Check and Action procedure
(No specific description indicates outdoor unit parts.)
Connection of connectors,
Fan motor, Wiring,
PC board
<401, 601> MCC-1768
<801, 1101> MCC-1705
Is circuit wiring normal?
Is there 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 run 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 control board
If defective, replace it
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
1.
2.
PC board
<401, 601> MCC-1768
<801, 1101> MCC-1705
Are characteristics
of TC and TCJ sensor
resistance value normal?
Are connections of
connectors, capacitors
and fan motor normal?
Heating operation
Does the heating outdoor fan
normally operate?
Clogging by refrigerant
overcharge / Pipe breakage /
Abnormal overload
C
Is there any element which
blocks hydro heat exchanger?
Filter clogging
Clogging of heat exchanger
Shor3.
2.
1.
t circuit
Elimination of
blocking element
Repair
defective position
Replace
TC or TCJ sensor
Check hydro PC board
Defective Replace
YES
YES
YES
NO NO
YES
NO
NO
→
To Next Page
Loading...
