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Mini VRF SYSTEM
Trouble Diagnosis
6
3. Mini VRF Alarm Codes
P08 Alarm
Alarm code P08
Alarm meaning R32 refrigerant leak detection
Alarm conditions
Refrigerant sensor of the indoor unit or R32 refrigerant leakage detection sensor detected R32 refrigerant.
Probable cause (1) Connection failure on "Refrigerant tube connection part", or refrigerant leakage caused by crack on "Indoor
unit's inside tube" or "Refrigerant tube between indoor and outdoor units"
(2) Using gases may cause false detection.
Check
(1) Check "Refrigerant tube connection part", "Indoor unit's inside tube" or "Refrigerant tube between indoor
and outdoor units".
(2) Check if one of the following items is in use that causes false detection.
•
Gas appliances with combustible gas (propane, methane)
• Insecticide or hair spray with combustible gas (LPG, etc.)
• Spray contained siloxane, medicines, drugs, lacquer, etc.
If the alarm P08 occurs, the indoor unit fan starts driving in order to prevent refrigerant retention and will
not stop despite pressing the Start/Stop button. In the event of stopping the fan for sake of the investigation
of the causes and repairing the refrigerant leak area, turn o the power after ventilating the room suciently.
Correction (1) Ventilate the room suciently and repair the refrigerant leak area.
(2) Stop using the items that are suspected to cause false detection and remove them with the ventilation
system.
When the refrigerant leak problem is solved, carry out the following procedures.
Replace the present refrigerant sensor with a new one in the following steps. (If the refrigerant sensor
detects the refrigerant leak once, detection performance decreases.)
In the case of R32 refrigerant leakage detection sensor:
• Replace the refrigerant sensor in the refrigerant leakage detection sensor with a new one.
• Reset the refrigerant sensor accumulated energization timer by pressing the switch of R32
refrigerant leakage detection sensor.
As to the procedure for refrigerant sensor replacement and resetting the accumulated energization timer,
refer to the Service Manual of indoor Unit.
In the case of indoor unit with a built-in refrigerant sensor:
• Replace the refrigerant sensor in the indoor unit with a new one.
(The unit with 2 refrigerant sensors must be replaced with both of them.)
• Change Detailed Setting Code 97 to "2" with the remote controller. Reset the refrigerant sensor
accumulated energization time. (After resetting, Code 97 automatically returns "0".)
As to the procedure for refrigerant sensor replacement, refer to the Service Manual of indoor Unit.
Cancel the alarm P08 in the following steps.
(The alarm P08 cannot be cancelled despite switching the power ON/OFF of the indoor unit.)
• Change Detailed Setting Code 97 to "3" with the remote controller. Cancel the alarm.
(After alarm cancellation, the code automatically returns to the original number.)
* At rst, replace the refrigerant sensor with a new one without fail. Then, cancel the alarm.
Check the following points whether the refrigerant sensor functions properly.
• Ensure that the inspection mark and alarm code do not appear on the remote controller.
• As to R32 refrigerant leakage detection sensor, the LED lights up in a normal mode. (Operation LED only
lights up.)
Example —
Notes
R32 refrigerant leakage detection sensor
• In normal operation mode
Operation LED (Green) : Light up, Alarm LED (Red) : Light o
• When refrigerant leak detected
Operation LED (Green) : Light o, Alarm LED (Red) : Blinking, Alarm buzzer : ON
* When the refrigerant concentration decreases, the LED of external sensor unit returns to normal and the
alarm buzzer stops. However, the alarm P08 of the indoor unit cannot be cancelled.
SM830289-00_Sec6.indd 19SM830289-00_Sec6.indd 19 2021/01/29 16:15:432021/01/29 16:15:43
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