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122
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'20 • PAC-SM-351
E49
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
NO
YES
NO
YES
Is the
service valve fully
opened?
Are the
connections of low
pressure sensor and suction pipe
temprerature sensor
connector OK?
NO
YES
NO
YES
Are the
characteristics of
low pressure sensor, suction
pipe temperature
sensor OK?
Is the low
pressure normal during
operation?
From previous page
Open fully.
Correct connector.
Defective low pressure
sensor, suction
pipe temperature
sensor
➞
Replace.
Charge refrigerant.
Defective outdoor unit
control PCB
➞
Replace.
(Defective low pressure
sensor, suction pipe
temperature sensor circuits)
2. Error detection method
3 .
Condition of error displayed
4. Presumable cause
Note:
Error code
Remote control:
LED Green Red
Outdoor control PCB
Outdoor inverter
PCB
1-time flashKeeps flashing
Indoor control PCB
Stays OFFKeeps flashing
Content
Keeps flashing
Yellow LED
Low pressure error or
low pressure sensor anomaly (2/2)
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