Troubleshooting 2.1 Display board 2.1.1 Icon explanation on indoor display board (Big cassette). 2.1.2 Icon explanation on indoor display board (Ceiling & Floor) 2.1.3 Icon explanation on indoor display board (A5 Duct) 2.1.4 Display of auto-lifting panel of 4 way cassette 2.1.5 Display of GA floor standing 2.1.6 Display board of M floor- standing 2.2 Indoor unit malfunction For GA & M floor standing: Contents Codes P0 Evaporator low temp. protection Ed Outdoor unit malfunction E1 Indoor / outdoor communication error E2 Open or short circuit of T1 temperature sensor E3 Open or short circuit of T2 temperature sensor E4 Open or short circuit of T2B temperature sensor E7 EEPROM chip malfunction E8 Indoor fan speed is out of control For the others tyoes: Defrosting Timer Display(digital NO. Malfunction Running lamp lamp lamp lamp tube) Communication malfunction between indoor 1 X X X E1 ☆ and outdoor units. Open or short circuit of T1 temperature 2 X X X E2 ☆ sensor Open or short circuit of T2 temperature 3 X X X E3 ☆ sensor Open or short circuit of T2B temperature 4 X X X E4 ☆ sensor 5 Full-water malfunction X X X EE ☆
Troubleshooting 2.1 Display board 2.1.1 Icon explanation on indoor display board (Big cassette). 2.1.2 Icon explanation on indoor display board (Ceiling & Floor) 2.1.3 Icon explanation on indoor display board (A5 Duct) 2.1.4 Display of auto-lifting panel of 4 way cassette 2.1.5 Display of GA floor standing 2.1.6 Display board of M floor- standing 2.2 Indoor unit malfunction For GA & M floor standing: Codes Contents P0 Evaporator low temp. protection Ed Outdoor unit malfunction E1 Indoor / outdoor communication error E2 Open or short circuit of T1 temperature sensor E3 Open or short circuit of T2 temperature sensor E4 Open or short circuit of T2B temperature sensor E7 EEPROM chip malfunction E8 Indoor fan speed is out of control For the others tyoes: NO. Malfunction Defrosting lamp lamp Running lamp Timer lamp Display(digital tube) 1 Communication malfunction between indoor and outdoor units. X X X ☆ E1 2 Open or short circuit of T1 temperature sensor X X ☆ X E2 3 Open or short circuit of T2 temperature sensor X X ☆ X E3 4 Open or short circuit of T2B temperature sensor X X ☆ X E4 5 Full-water malfunction X ☆ X X EE
U2MRT-Light-Commercial-Lot11.docx