67
(4) Cause Code of Indoor Unit Stoppage ( )
Code
(SEG1)
Item
Code
(SEG1)
Item
Operation OFF, Power OFF
Instantaneous Overcurrent of Inverter;
Electronic Thermal Activation of Inverter Retry;
Abnormal Current Sensor of Inverter Retry.
Thermo-OFF
Retry due to Inverter Voltage Decrease;
Retry due to Inverter Overvoltage
Alarm
Electronic Valve Opening Difference
Protection
Freeze Protection; Overheating Protection Forced Thermo-OFF for Oil Return
Instantaneous Power Failure at the Outdoor Unit The Outdoor Unit Hot Start
Instantaneous Power Failure at the Indoor Unit Retry due to High Pressure Decrease
Stoppage of Cooling Operation due to High/Low Outdoor
Air Temperature
Stoppage of Heating Operation due to High Outdoor Air
Temperature
Cooling Air Discharge Temperature Decrease
Demand. Forced Stoppage Forced Thermo-OFF
Retry due to Pressure Ratio Decrease Forced Thermo-OFF
Retry due to Ps Increase
Retry due to Abnormal Operating Mode
(4-Way Valve Switching Failure)
Retry due to Pd Increase Retry after Defrosting Operation
Retry due to Discharge Gas Temperature Increase; Retry
due to Low Pressure Decrease
Forced Thermo-OFF for the Indoor Units Rotation
Retry due to Discharge Gas SUPERHEAT
Decrease
Forced Thermo-OFF for the Outdoor Unit Control
Notes:
●
The cause code of indoor unit stoppage is not always “ ” (Alarm) during stoppage by the abnormality.
If the unit is under Thermo-OFF by other cause of stoppage before “ ” (Alarm) occurs, the previous cause code of indoor unit
stoppage remains.
●
When the communication between the driver board and the outdoor unit PCB is disconnected for 30
seconds, the outdoor micro-computer will be reset. Accordingly when the alarm code “ ”
(Communication Failure between Driver Board and Outdoor Unit PCB) occurs, the cause code of indoor unit stoppage may be
indicated “ ”.
●
When the communication between the indoor unit and the outdoor unit is disconnected for 3 minutes, the
indoor micro-computer will be reset. Accordingly when the alarm code “ ”
(Communication Failure between Indoor Unit and Outdoor Unit) occurs, the cause code of indoor unit stoppage may be
indicated “ ”.
TROUBLESHOOTING
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