– 217 –
Yes
Yes
No
No
No
Yes
Yes
No
Yes
No
[P15]
esua
Cedo
c
kceh
C
Check code name
Gas leak detection
TS condition (Sub-code: 01)
1. Outdoor unit service valve closed
2. Outdoor PMV error
3. TS1 sensor error
4. Refrigerant shortage, clogging refrigerant circuit
5. 4-way valve error
6. SV4 circuit error
Are service valves
at gas and liquid
side fully opened?
Open service valves fully.
Repair outdoor PMV.
Replace TS1 sensor.
Check and replace 4-way
valve and coil.
Repair SV41/SV42/SV43
valve circuits.
Refrigerant shortage,
clogging, pipe breakage.
(Check there is no clogging and pipe
breakage, and then recharge refrigerant.)
(Coil, valve body, disconnection
of wire, etc.)
Are
characteristics
of TS1 sensor
resistance
normal?
Does discharge
refrigerant gas bypass
to suction side through
4-way valve?
Is there any
leakage on SV41,
42 and 43 valve
circuits?
Connectors: PMV1: CN300,
PMV2: CN301, PMV4: CN303
Is outdoor PMV normal?
1. Connector connection
2. Wiring
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
Yes
Yes
No
No
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
Yes
[P13]
esuaCedoc kcehC Check code name
Outdoor liquid back detection
error
1. PMV1/PMV2 error
2. Pd sensor, Ps sensor error
3. Clogging of SV2 circuit
4. Clogging of SV3B circuit and/or balance pipe
5. Leakage at a check valve on a main discharge pipe
6. Outdoor I/F P.C. board error
Are
connections of outdoor
PMV1/PMV2/PMV4
connectors correct?
Are
operations of outdoor
PMV1/PMV2/PMV4
normal?
Are
characteristics of
Pd sensor/Ps sensor
output voltage
normal?
Is SV2 valve coil
correctly connected?
Are balance pipe
service valves of
all units fully
opened?
Is there no
clogging of SV3B
valve?
Is there no
clogging of SV3B valve
of any other unit than
malfunctioning one?
Correct connector connection.
(PMV1: CN300, PMV2:
CN301, PMV4: CN303)
PMV error
Pd sensor/Ps sensor error
Correct connector connection.
(CV2: CN302)
Open fully balance pipe
service valves of all units.
Replace clogging parts.
Replace clogging parts.
Replace check valve of main
discharge pipe.
Check I/F P.C. board.
Is there no leakage of
check valve of main
discharge pipe in follower
units in which compressors
are driven in cooling
operation?
* See “Outdoor unit temperature sensor
characteristics” on “8-9. Sensor Characteristics”.
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