MULTI TYPE

Check code Check code name
Cause
[P15] / [AE]
(AI-NET)
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?
No
Open service valves fully.
Yes
Is outdoor PMV normal?
1. Connector connection
2. Wiring
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
No
Connectors: PMV1: CN300,
PMV2: CN301, PMV4: CN303
Repair outdoor PMV.
Yes
Are
characteristics
of TS1 sensor
resistance
normal?
Yes
No
* See “Outdoor unit temperature sensor
characteristics” on “8-9. Sensor Characteristics”.
Replace TS1 sensor.
Does discharge
refrigerant gas bypass
to suction side through
4-way valve?
Yes
Check and replace 4-way
valve and coil.
No
Is there any
leakage on SV41,
42 and 43 valve
circuits?
Yes
No
Repair SV41/SV42/SV43
valve circuits.
(Coil, valve body, disconnection
of wire, etc.)
Refrigerant shortage,
clogging, pipe breakage.
(Check there is no clogging and pipe
breakage, and then recharge refrigerant.)
Check code Check code name
Cause
[P13] / [47]
(AI-NET)
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?
No
Correct connector connection.
(PMV1: CN300, PMV2:
CN301, PMV4: CN303)
Yes
Are
operations of outdoor
PMV1/PMV2/PMV4
normal?
No
PMV error
Yes
Are
characteristics of
Pd sensor/Ps sensor
output voltage
normal?
No
Pd sensor/Ps sensor error
Yes
Is SV2 valve coil
correctly connected?
No
Correct connector connection.
(CV2: CN302)
Yes
Are balance pipe
service valves of
all units fully
opened?
No
Open fully balance pipe
service valves of all units.
Yes
Is there no
clogging of SV3B
valve?
Yes
Replace clogging parts.
No
Is there no
clogging of SV3B valve
of any other unit than
malfunctioning one?
Yes
Replace clogging parts.
No
Is there no leakage of
check valve of main
discharge pipe in follower
units in which compressors
are driven in cooling
operation?
Yes
Replace check valve of main
discharge pipe.
Yes
Check I/F P.C. board.
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