Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook page 9

CONTENTS
IX Troubleshooting
[1] Error Code Lists.................................................................................................................... 227
[2] Responding to Error Display on the Remote Controller........................................................ 230
[3] Investigation of Transmission Wave Shape/Noise ............................................................... 303
[4] Troubleshooting Principal Parts............................................................................................ 306
[5] Refrigerant Leak ................................................................................................................... 343
[6] Compressor Replacement Instructions................................................................................. 347
[7] Servicing the BC controller ................................................................................................... 353
[8] Troubleshooting Using the Heat source Unit LED Error Display .......................................... 356
X LED Monitor Display on the Heat source Unit Board
[1] How to Read the LED on the Service Monitor ...................................................................... 359
HWE09080 GB