3-80
Check code
Operation cause
[A7]
TS condition gas leak detection
1. Outdoor unit service valve closed
2. Blockage of check valve to interrupt the liquid line.
3. Outdoor PMV A error
4. TS sensor error
5. Insufficient refrigerant, blockage in pipe
6. 4-way valve error
YES
YES
YES
NO
NO
Open service valve fully.
Replace TS sensor.
Are gas pipe,liquid pipe,
and service valve of the
outdoor unit fully open?
YES
NO
Check and replace 4-way valve unit.
Is refrigerant bypassed from
discharge port to compressor
suction port with 4-way valve?
Is resistance characteristics
of TS sensor normal?
Insufficient refrigerant,
blockage, pipe breakage
NO
Repair outdoor PMVA.
Is outdoor PMV A normal?
1. Connector connection
2. Wiring
3. Coil
4. Valve unit
5. Outdoor P.C. board
NO
YES
YES
Replace the check valve
In there blockage in
the check valve to interrupt
the liquid line?
*
In cooling
only model
( )
Check there is no blockage or pipe
breakage, and then addrefrigerant according
to judgment of refrigerant amount.
Check code
Operation cause
[AA]
Pd sensor alarm
Pd sensor output voltage alarm
It is abnormal output voltage of Pd sensor. Check disconnection of connector connection circuit (Pd sensor :
CN501) and output voltage of the sensor.
If the sensor is normal, replace the outdoor interface P.C. board.
