To Next Page

To Previous Page

Si12-411A

Service Diagnosis 163

Part 6

Service Diagnosis

1. Caution for Diagnosis..........................................................................164

1.1 Troubleshooting with the Operation Lamp ...........................................164

2. Problem Symptoms and Measures .....................................................166

3. Service Check Function ......................................................................167

4. Code Indication on the Remote Controller ..........................................168

4.1 Error Codes and Description of Fault ...................................................168

5. Troubleshooting ..................................................................................169

5.1 Indoor Units ..........................................................................................169

5.2 Outdoor Units .......................................................................................170

5.3 Indoor Unit PCB Abnormality ...............................................................171

5.4 Freeze-up Protection Control or High Pressure Control.......................172

5.5 Fan Motor or Related Abnormality .......................................................174

5.6 Thermistor or Related Abnormality (Indoor Unit)..................................177

5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality .......................178

5.8 Signal Transmission Error (between Indoor and Outdoor Units)..........179

5.9 Unspecified Voltage (between Indoor and Outdoor Units) ...................180

5.10 Freeze-up Protection Control ...............................................................181

5.11 OL Activation (Compressor Overload) .................................................183

5.12 Compressor Lock .................................................................................184

5.13 DC Fan Lock ........................................................................................185

5.14 Input Over Current Detection ...............................................................186

5.15 Four Way Valve Abnormality................................................................188

5.16 Discharge Pipe Temperature Control...................................................190

5.17 Position Sensor Abnormality ................................................................191

5.18 CT or Related Abnormality ...................................................................192

5.19 Thermistor or Related Abnormality (Outdoor Unit)...............................194

5.20 Electrical Box Temperature Rise..........................................................196

5.21 Radiation Fin Temperature Rise ..........................................................198

5.22 Output Over Current Detection.............................................................200

5.23 Insufficient Gas.....................................................................................202

5.24 Low-voltage Detection..........................................................................204

5.25 Anti-icing Function in Other Rooms / Unspecified Voltage

(between Indoor and Outdoor Units)....................................................205

6. Check ..................................................................................................206

6.1 How to Check .......................................................................................206

Daikin 4MKD90BVM User Manual

Questions and Answers: