Mitsubishi Electric City Multi PQHY-P72 Service Handbook page 9

CONTENTS
IX Troubleshooting
[1] Check Code Lists................................................................................................................ 179
[2] Responding to Error Display on the Remote Controller...................................................... 182
[3] Investigation of Transmission Wave Shape/Noise ............................................................. 265
[4] Troubleshooting Principal Parts.......................................................................................... 268
[5] Refrigerant Leak ................................................................................................................. 298
[6] Servicing the BC controller ................................................................................................. 300
X
LED Monitor Display on the Heat Source Unit Board
[1] How to Read the LED on the Service Monitor .................................................................... 305