6 - 5
Mini VRF SYSTEM
Trouble Diagnosis
6
3. Mini VRF Alarm Codes
Alarm code Alarm meaning Page
E06 Some indoor units do not respond to outdoor unit. 6-6
E12 Auto Address failed to start. 6-6
E15 Fewer indoor units are found in Auto Addressing than the setting on outdoor PCB. 6-6
E16 More indoor units are found in Auto Addressing than the setting on outdoor PCB. 6-7
E20 No indoor unit responded in Auto Addressing. 6-7
F04 Compressor discharge temperature sensor has failure. (DISCH) 6-8
F06 Outdoor unit heat exchanger gas temperature sensor has failure. (EXG) 6-9
F07 Outdoor unit heat exchanger liquid temperature sensor has failure. (EXL) 6-9
F08 Outdoor temperature sensor has failure. (TO) 6-9
F12 Compressor inlet temperature sensor has failure. (SCT) 6-9
F16 High pressure sensor has failure. (HPS) 6-10
F17 Low pressure sensor has failure. (LPS) 6-11
F31 EEPROM on outdoor unit PCB has failure. 6-11
H01 Compressor primary current is overcurrent. 6-11
H03 Compressor current sensor is disconnected or shorted. 6-12
H05
Compressor discharge temperature sensor is disconnected, shorted or misplaced.
(DISCH)
6-12
H06 Low pressure sensor value is too low. 6-13
H31
Compressor HIC has failure. HIC is overcurrent or overheat. VDC is undervoltage or
overvoltage.
6-14
L04 Duplicate system address setting on outdoor units. 6-15
L10 Capacity setting of outdoor unit is not correct. 6-15
L13 Indoor unit model does not match with outdoor unit. 6-15
L18 4-way valve has failure. 6-15
P03 Compressor discharge temperature is too high. 6-16
P04
High pressure switch is activated.
6-17
P05 AC power supply has abnormal. 6-18
P08
Refrigerant sensor of the indoor unit or R32 refrigerant leakage detection sensor
detected R32 refrigerant.
6-19
P14 Refrigerant leakage detection of one of the indoor units connected to the outdoor unit. 6-20
P16 Compressor secondary current is overcurrent. 6-21
P20 Too high load in refrigerant circuit. 6-21
P22 Outdoor unit fan motor has failure. 6-22
P29 Compressor start failure. Compressor is missing phase or reverse phase. 6-22
J01 R32 refrigerant leakage detection sensor has failure.
-*
J02 Life of refrigerant leak sensor in R32 refrigerant leakage detection sensor has expired.
*Refer to the Service Manual of indoor Unit.
SM830289-00_Sec6.indd 5SM830289-00_Sec6.indd 5 2021/01/29 16:15:402021/01/29 16:15:40
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