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Mitsubishi Electric Manuals
Air Conditioner
PUHY-HP72
Service handbook
Mitsubishi Electric PUHY-HP72 Service Handbook page 197
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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8-11
Measures for Refrigerant Leakage
.................................................................................................... 50
8-12
Parts Replacement Instructions
........................................................................................................ 52
8-12-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant Circuit Parts)
............. 52
8-12-2 Notes on Wiring Installation
.................................................................................................................. 53
8-12-3 Four-way Valve and Check Valve Replacement Procedure
................................................................. 54
8-12-4 Compressor Replacement Procedure
................................................................................................... 62
8-12-5 Removal Instructions for the Control Box
............................................................................................. 64
8-12-6 Transformer box replacement instructions
............................................................................................ 66
8-12-7 Maintenance Procedure for the Drain Pan
............................................................................................ 68
8-12-8 Maintenance Procedures for the Heat Exchanger
................................................................................ 70
8-12-9 Accumulator Replacement Procedure
.................................................................................................. 77
8-13
Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit
..................... 79
HWE18240_GB
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Chapters
Table of Contents
8
Chapter 2 Restrictions
26
Chapter 3 Major Components, Their Functions and Refrigerant Circuits
58
Chapter 4 Electrical Components and Wiring Diagrams
68
Chapter 5 Control
86
Chapter 6 Test Run
110
Chapter 7 Troubleshooting Using Error Codes
118
Chapter 8 Troubleshooting Based On Observed Symptoms
196
Chapter 9 Usb Function
278
Table of Contents
Troubleshooting
Chapter 7 Troubleshooting Using Error Codes
118
Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems
215
Troubleshooting Solenoid Valve Problems
219
Troubleshooting Outdoor Unit Fan Problems
221
Troubleshooting LEV Problems
222
Troubleshooting Inverter Problems
228
Troubleshooting Problems with IGBT Module
237
Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit
243
Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit
276
Maintenance LED Display and Troubleshooting
289
Troubleshooting
292
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This manual is also suitable for:
Puhy-hp192
Puhy-hp120tnu-a
Puhy-hp240tsnu-a
Puhy-hp96
Puhy-hp240tysnu-a
Puhy-hp120tynu-a
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Puhy-hp144
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