23
8 ERRORS DISPLAY
If there is an error occurring during the operation of the system, the error code will be displayed on the LCD, as show in Fig. 24. If multi errors occur at the same time, their
codes will be displayed circularly.
Note: In event of any error, please turn o the unit and contact the professionally skilled personnel.
Fig. 24
Error Error code Error Error code
Return air temperature sensor open/short circuited F1 Drive board communication error P6
Evaporator temperature sensor open/short circuited F2 Compressor overheating protection H3
Indoor unit liquid valve temperature sensor open/short circuited B5 Indoor and outdoor units unmatched LP
Indoor gas valve temperature sensor open/short circuited B7 Communication line misconnected or expansion valve error Dn
IPM temperature sensor open/short circuited P7 Running mode conict E7
Outdoor ambient temperature sensor open/short circuited F3 Pump-down Fo
Outdoor unit condenser mid-tube temperature sensor open/short circuited F4 Defrost or oil return
Discharge temperature sensor open/short circuited F5 Forced defrosting H1
Communication error between indoor and outdoor unit E6 Compressor startup failure Lc
DC bus under-voltage protection PL High discharge temperature protection E4
DC bus over-voltage protection PH Overload protection E8
Compressor phase current sensing circuit error U1 Whole unit over-current protection E5
Compressor demagnetization protection HE Over phase current protection P5
PFC protection Hc Compressor desynch H7
IPM Temperature Protection P8 IPM Current protection H5
Overload protection L9 Compressorphaseloss/reversal protection Ld
System charge shortage or blockage protection F0 Frequency restricted/reduced with whole unit current protection F8
Capacitor charging error PU Frequency restricted/reduced with IPM current protection En
High pressure protection E1 Frequency restricted/reduced with high discharge temperature F9
Low pressure protection E3 Frequency restricted/reduced with antifreezing protection FH
Compressor stalling LE Frequency restricted/reduced with overload protection F6
Over-speeding LF Frequency restricted/reduced with IPM temperature protection EU
Drive board temperature sensor error PF Indoor unit full water error E9
AC contactor protection P9 Anti-freeze protection E2
Temperature drift protection PE AC input voltage abnormal PP
Sensor connection protection Pd Whole unit current sensing circuit error U5
DC bus voltage drop error U3 4-way valve reversing error U7
Outdoor fan 1 error protection L3 Motor stalling H6
Outdoor fan 2 error protection LA PG motor zero-crossing protection U8
Compressor suction temperature sensor error Dc Indoor fan tripping error U0
IDU network address error Y3
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