Daikin ERQ Series Service Manual page 6

4. Troubleshooting (OP: Unified ON/OFF Controller) .............................261
1. Piping Diagrams..................................................................................268
2. Wiring Diagrams for Reference...........................................................271
3. List of Electrical and Functional Parts .................................................275
4. Option List ...........................................................................................277
5. Thermistor Resistance / Temperature Characteristics........................278
6. Pressure Sensor .................................................................................280
7. Method of Checking The Inverter's Power Transistors and
1. Precautions for New Refrigerant (R-410A) .........................................284
iv
3.44 "U5" AHU: Malfunction of Transmission Between Remote
Controller and AHU ..............................................................................254
3.45 "U9" AHU: Malfunction of Transmission Between AHU and
Outdoor Units in the Same System ......................................................255
3.46 "UA" Improper Combination of AHU and Outdoor Units, AHUs
and Remote Controller .........................................................................256
3.47 "UF" System is not Set yet ...................................................................258
3.48 "UH" Malfunction of System, Refrigerant System Address
Undefined .............................................................................................259
4.1 Operation Lamp Blinks .........................................................................261
1.1 Outdoor Unit .........................................................................................268
2.1 Outdoor Unit .........................................................................................271
2.2 Field Wiring ..........................................................................................274
3.1 Outdoor Unit .........................................................................................275
Diode Modules ....................................................................................281
1.1 Outline ..................................................................................................284
1.2 Refrigerant Cylinders............................................................................286
1.3 Service Tools........................................................................................287
ESiEN09-06 A
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