Content
1. Safety Precautions ......................................................................................................................... 1
2.
Troubleshooting ........................................................................................................................... 4
2.1 Safety caution .................................................................................................................... 4
2.2 Error diagnosis and solution without error code ................................................................. 4
2.3 Error code list .................................................................................................................... 6
2.4 Spot check ......................................................................................................................... 7
2.4 Troubleshooting by error code ........................................................................................... 8
Indoor unit error .............................................................................................................. 8
2.4.1 E1 (IDU) Communication failure between indoor and outdoor unit ......................... 8
2.4.2 E2, E3, E4 (IDU) temperature sensor fault .............................................................. 8
2.4.3 E6 (IDU) Zero-crossing detection fault ................................................................... 9
2.4.4 E7 (IDU) EEPROM error........................................................................................ 9
2.4.5 E8 (IDU) PG fan motor stall protection ................................................................... 9
2.4.6 E9 (IDU) Communication fault of wired controller ................................................. 10
2.4.7 HC Room card port disconnected port..................................................................... 10
Outdoor unit error ............................................................................................................ 11
2.4.8 E2 (ODU) Communication failure between indoor and outdoor unit ....................... 11
2.4.9 E4, E5, E6 (ODU) temperature sensor fault............................................................. 11
2.4.10 E9 (ODU) AC over-voltage / under-voltage protection .......................................... 11
2.4.11 E10 (ODU) Outdoor unit EEPROM error .............................................................. 11
2.4.12 E11 (ODU) Indoor unit fan motor fault ................................................................. 11
2.4.13 E12 (ODU) IPM temperature sensor fault ............................................................. 11
2.4.14 E2x Outdoor unit fan motor fault .......................................................................... 12
2.4.15 H2x Compressor fault ........................................................................................... 12
2.4.16 P3 Primary / secondary over-current protection ..................................................... 12
2.4.17 P4 High discharge temperature protection ............................................................. 13
2.4.18 P5 High condenser temperature protection ............................................................ 13
2.4.19 P6 IPM module fault ............................................................................................. 13
2.4.20 P7 IDU anti-frosting protection ............................................................................. 14
2.4.21 P8 High IPM temperature protection ..................................................................... 14
2.4.22 P9 Outdoor unit fan motor stall protection............................................................. 15
2.4.23 P11 High evaporator temperature protection ......................................................... 15
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