Table of Contents
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Si12-714
1. Caution for Diagnosis.........................................................................170
2. Problem Symptoms and Measures .....................................................172
3. Service Check Function ......................................................................173
4. Code Indication on the Remote Controller ..........................................176
5. Troubleshooting ..................................................................................177
6. Check ..................................................................................................216
Service Diagnosis
Service Diagnosis
1.1 Troubleshooting with Operation Lamp .................................................170
4.1 Error Codes and Description of Fault ...................................................176
5.1 Indoor Units ..........................................................................................177
5.2 Outdoor Units .......................................................................................178
5.3 Indoor Unit PCB Abnormality ...............................................................179
5.4 Freeze-up Protection Control or High Pressure Control.......................180
5.5 Fan Motor or Related Abnormality .......................................................182
5.6 Thermistor or Related Abnormality (Indoor Unit)..................................185
5.8 Unspecified Voltage (between Indoor and Outdoor Units) ...................188
5.9 Freeze-up Protection Control ...............................................................189
5.10 OL Activation (Compressor Overload) .................................................191
5.11 Compressor Lock .................................................................................192
5.12 DC Fan Lock ........................................................................................193
5.13 Input Over Current Detection ...............................................................194
5.14 Four Way Valve Abnormality................................................................196
5.15 Discharge Pipe Temperature Control...................................................198
5.16 High Pressure Control in Cooling .........................................................199
5.17 Position Sensor Abnormality ................................................................201
5.18 CT or Related Abnormality ...................................................................202
5.19 Thermistor or Related Abnormality (Outdoor Unit)...............................204
5.20 Electrical Box Temperature Rise..........................................................206
5.21 Radiation Fin Temperature Rise ..........................................................208
5.22 Output Over Current Detection.............................................................210
5.23 Insufficient Gas.....................................................................................212
5.24 Low-voltage Detection..........................................................................214
(between Indoor and Outdoor Units) ....................................................215
6.1 How to Check .......................................................................................216
Part 6
169
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Table of Contents
Troubleshooting
