Trouble shooting 22
OUTDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause :
OK
Indicate or Display:
Low pressure error
Outdoor unit Main PCB
Pressure sensor
Check if the terminal connection is loose.
Check if connector is removed.
Check if connector is erroneous connection.
Check if cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
1. Connector connection failure 2. Pressure sensor failure 3. Main PCB failure 4. Gas leak, less
Check Point 1 : Check connections of the Pressure sensor
In cooling operation, 1 minute or more after compressor's start-up,
when pressure sensor detects 0.12 MPa or less for consecutive
5 minutes.
02-24
Refer to error code table.
Check Point 2 : Check output voltage of Main PCB
Check voltage of Main PCB.
(Measure at Main PCB side connector)
>>1 pin(Red) - 3 pin(Black) DC5V 5%
BLACK
WHITE
RED
CN119
1
2
3
1
2
3
PS
PRESSURE SENSOR
If the voltage is not correct, replace Main PCB.
Check Point 3 : Check if gas leak or less gas
Measure Gas pressure, if there is a leak, correct it.
>> If recharging refrigerant, make sure to perform
vacuuming and recharge the specified amount.
MPa MPa
OK
OK
Check Point 4 : Replace Pressure sensor
If Check Point 1 ~ 3 do not improve the symptom, replace Pressure sensor.
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