Daikin ERSQ 011AAV1, Service Manual

Page: 6 / 262

ESIE09-08
iv Table of Contents
3.47 “LC” Indoor Unit: Malfunction of Transmission between Inverter and Con-
trol PC Board........................................................................................186
3.48 “LH” Indoor Unit: Converter Error .........................................................187
3.49 “P1” Outdoor Unit: High Voltage of Capacitor in Main Inverter Circuit .188
3.50 “P1” Indoor Unit: High Voltage of Capacitor in Main Inverter Circuit ....189
3.51 “PJ” Indoor Unit: Faulty Combination of PCB.......................................190
3.52 “U0” Low Pressure Drop Due to Refrigerant Shortage or Electronic Expan-
sion Valve Failure.................................................................................191
3.53 “U2” Power Supply Insufficient or Instantaneous Failure .....................193
3.54 “U2” Power Supply Insufficient or Instantaneous Failure .....................195
3.55 “U4” Malfunction of Transmission between Indoor Unit and Outdoor
Unit .......................................................................................................197
3.56 “U4” Malfunction of Transmission Indoor Unit ......................................199
3.57 “U5” Malfunction of Transmission between Remote Control and Indoor
Unit .......................................................................................................200
3.58 “U7” Indoor Unit: Malfunction of Transmission Outdoor Unit................201
3.59 “U8” Malfunction of Transmission between Main and Sub Remote
Controls ................................................................................................202
3.60 “UA” Communication Error between Outdoor Unit and Indoor Unit .....203
3.61 “UF” System is not Set yet ...................................................................204
3.62 “UH” Malfunction of System, Refrigerant System Address Undefined .205
Part 8 - Appendix ........................................................................ 209
1. Piping Diagrams..................................................................................210
1.1 Outdoor Unit .........................................................................................210
1.2 Indoor Unit............................................................................................212
1.3 Switch Box Layout................................................................................214
2. Wiring Diagrams..................................................................................216
2.1 Outdoor Unit .........................................................................................216
2.2 Field Wiring Connection Diagram.........................................................220
2.3 Indoor Unit............................................................................................221
3. Thermistor Resistance / Temperature Characteristics........................229
4. Pressure Sensor .................................................................................232
5. Method of Replacing the Inverter’s Power Transistors Modules.........233
Part 9 - Precautions for New Refrigerant (R-410A) ................... 237
1. Precautions for New Refrigerant (R-410A) .........................................238
1.1 Outline ..................................................................................................238
1.2 Refrigerant Cylinders............................................................................240
1.3 Service Tools........................................................................................241
Index ................................................................................................ i
Drawings & Flow Charts ............................................................... iii