– 214 –
(A)
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
No
Yes
No
No
No
[P04]
esuaCedoc k
cehC
Check code name
Error concerning high-pressure
SW
1. High-pressure SW error
2. Service valve closed
3. Pd sensor error
4. Indoor/outdoor fan error
5. Indoor/outdoor PMV choke
6. Indoor/outdoor heat exchanger clogging, air short
circuit
7. SV2 circuit error
8. SV4 circuit error
9. SV5 circuit error
10. Discharge line check valve malfunction
11. Refrigerant overcharge
Sub-code:
01: Compressor 1, 02: Compressor 2, 03: Compressor 3
Note) High-pressure SW is
normally closed. (B contact)
Does high-pressure SW
operate?
Are parts of high-
pressure SW normal?
Is service valve fully
opened?
Are characteristics of
high-pressure sensor
normal?
Does cooling outdoor
fan normally operate?
Is there any
interference of heat-
exchanging of outdoor unit?
1. Heat exchanger clogging
2. Air short circuit
Is there any crack or
coming-off of fan?
Connector connection, fan
IPDU, fan motor, wiring
Connectors: PMV1: CN300,
PMV2: CN301, PMV4: CN303
Is circuit cabling
normal?
Check parts.
Failure
Replace
Check and correct
cabling.
Open service valve
fully.
Replace the high-
pressure sensor.
Repair faulty parts.
Repair outdoor PMV.
Eliminate the
interference.
Check A3-IPDU P.C. board.
Failure
replace
(B) Cooling operation
Cooling
To (B)
Heating
To (C)
Reset power supply, and start a test
operation corresponded to the season.
Is outdoor PMV normal?
1. Connector connection
2. Cabling
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
Yes
No
Yes
Yes
No
Yes
No
No
No
Yes
Yes
No
[P03]
esuaCedoc kcehC Check code name
Discharge temp TD1 error
Are service
valve of gas and liquid
sides fully opened?
Open service valve fully.
Repair outdoor PMV.
Replace TD1 sensor.
Check 4-way valve.
Correct installation of valve
coil.
Replace SV41 valve.
Correct wiring
Refrigerant shortage,
clogging, pipe breakage
1. Service valve of outdoor unit closed
2. Outdoor PMV error
3. TD sensor error
4. Refrigerant shortage, clogging of refrigerant piping
5. 4-way valve error
6. SV4 circuit leakage, misinstallation
Are
characteristics of
TD1 sensor resistance
normal?
Does
discharged refrigerant
gas leak to suction side
through 4-way
valve?
Are indoor units of a
different refrigerant line
connected?
Connectors: PMV1: CN300, PMV2: CN301, PMV4: CN303
(Check it using the miswiring check
function of the outdoor unit.)
(Check there is no pipe breakage, and
then recharge the refrigerant.)
Is outdoor PMV normal?
1. Connector connection
2. Wiring
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
SV4 circuit
1. Are SV41, SV42 and
SV43 valve coils
installed correctly?
2. Is SV41 circuit sealed
correctly (no leakage)?
* See “Outdoor unit temperature sensor
characteristics” on “8-9. Sensor Characteristics”.
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