Mitsubishi PUHY-EP250 Service Handbook page 9

CONTENTS
Chapter 8 Troubleshooting Based on Observed Symptoms
8-1 MA Remote Controller Problems ...................................................................................................... 207
8-2 ME remote Controller Problems ....................................................................................................... 211
8-3 Refrigerant Control Problems ........................................................................................................... 215
8-4 Checking Transmission Waveform and for Electrical Noise Interference .................................... 220
8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ........ 223
8-6 Troubleshooting Solenoid Valve Problems ..................................................................................... 225
8-7 Troubleshooting Outdoor Unit Fan Problems ................................................................................. 227
8-8 Troubleshooting LEV Problems........................................................................................................ 228
8-9 Troubleshooting Inverter Problems ................................................................................................. 234
8-10 Control Circuit .................................................................................................................................... 243
8-11 Measures for Refrigerant Leakage ................................................................................................... 246
8-12 Compressor Replacement Instructions ........................................................................................... 248
8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ..................... 250
Chapter 9 LED Status Indicators on the Outdoor Unit Circuit Board
9-1 LED Status Indicators ........................................................................................................................ 253
9-2 LED Status Indicators Table ............................................................................................................. 256
HWE12050 GB