Haier AU42NALEAA Service Manual - Page 175

>a__WcU[S^ a`V[e[a`Wc 6) Outdoor SPDU module over current protection Outdoor indicator shows 00101. Alarm condition: When compressor running, the module current is over 21A. outdoor failure indicator shows 00101 check if the refrigerant is yes too much or too less adjust refrigerant no check if the piping is yes blocked adjust piping no replace SPDU module 7) Outdoor high pressure protection Outdoor indicator shows 01000 Alarm condition: When compressor running, high pressure is over 4.5 MPa for 30 seconds continously. outdoor failure indicator shows 01000 check if the refrigerant is too yes much or less by the pressure gauge adjust refrigerant no check if the piping is blocked yes adjust piping no if high pressure switch is normal yes replace sensor 8) Outdoor power supply is abnormal Outdoor indicator shows 01010 Alarm condition: if power supply is not 50Hz as standard, which will affect the normal communication and cause air conditioner bad operation. outdoor indicator shows 01010 check if the wiring between indoor and outdoor is correct no adjust wiring yes check if power no adjust power supply as supply is normal 50HZˈ220-230VAC -175-