– 220 –
Yes
Yes
No
No
No
No
Yes
No
Yes
Yes
No
Yes
Yes
Yes
No
No
Yes
No
(C)
Yes
No
Heating operation
Yes
Yes
Yes
No
Yes
No
No
Yes
No
Yes
No
No
Yes
No
[P20]
Cooling operation
(B)
No
Yes
No
esuaCedoc kcehC Check code name
High-pressure protective
operation
1. Pd sensor error
2. Service valve closed.
3. Indoor/outdoor fan error
4. Indoor/outdoor PMV clogging
5. Indoor/outdoor heat exchanger clogging
6. SV2 circuit error
7. SV4 circuit error
8. SV5 circuit error
9. Outdoor I/F P.C. board error
10. Operation error of check valve of main discharge
pipe
11. Refrigerant overcharge
Are service valves fully
opened?
Does heating
indoor fan normally
operate?
Is indoor PMV
normal?
Is check valve
of main
discharge pipe
normal?
Is there
clogging in any
valves?
Is SV5 circuit normal?
Are any indoor
units in different
refrigerant circuit
connected?
Are
characteristics of
sensor TC2 and TCJ
resistance normal?
Is connector
connection and coil
normal?
Is connector
connection, condenser
or fan motor normal?
Does
cooling outdoor fan
normally operate?
Is there
any fan crack
or coming-off?
Is SV2 bypass
circuit normal?
Is SV4 circuit normal?
Is check valve of
main discharge pipe
normal?
Are
characteristics of high-
pressure sensor
normal?
Open service valves fully.
Repair faulty parts.
Repair faulty parts.
Repair check valve.
Replace
Eliminate the
interference.
Replace PMV body.
Repair SV5 circuit.
Check and correct
wiring.
Replace TC2 or TCJ
sensor.
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload
Check indoor P.C. board.
Faulty
Replace
(Coil error, choke,
disconnection of cables, etc.)
(Check it using the
miswiring check function
of the outdoor unit.)
Repair faulty parts.
Repair faulty parts.
Repair outdoor PMV.
Eliminate the interference.
Repair SV2 bypass circuit.
Repair SV4 circuit.
Repair check valve.
Replace
Refrigerant overcharge, clogging, pipe
breakage, abnormal overload
(Connector connection, fan IPDU,
fan motor, cabling)
(Coil error, clogging, disconnection
of wire, etc.)
(Coil error, clogging, disconnection
of wire, etc.)
Check parts.
Failure
Replace
Reset power supply, and start a test operation
corresponded to the season.
Cooling
To (B)
Heating
To (C)
* 1. Pressure by pressure gauge (Check joint)
2. Pressure display on 7-segment display
3. Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor
is considered.
If 2 and 3 are different, check I/F P.C. board.
Is there any
interference of heat-
exchanging of outdoor unit?
1. Heat exchanger clogging
2. Air short circuit
Connectors: PMV1: CN300,
PMV2: CN301, PMV4: CN303
Yes
Is outdoor PMV normal?
1. Connector connection
2. Wiring
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
Is there any interference
of heat-exchanging of
indoor unit?
1. Filter clogging
2. Heat exchanger
clogging
3. Air short circuit
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