SiUS12-928_B
iv
Table of Contents
3. Service Check Function ..........................................................................138
3.1
ARC452 Series Remote Controller .......................................................... 138
3.2
ARC433 Series Remote Controller .......................................................... 141
4. Code Indication on Remote Controller ....................................................144
4.1
Indoor Unit................................................................................................ 144
4.2
Outdoor Unit ............................................................................................. 145
5. Troubleshooting for Indoor Unit...............................................................146
5.1
Indoor Unit PCB Abnormality ................................................................... 146
5.2
Freeze-up Protection Control or Heating Peak-cut Control...................... 148
5.3
Fan Motor or Related Abnormality ........................................................... 150
5.4
Thermistor or Related Abnormality (Indoor Unit)...................................... 153
5.5
Signal Transmission Error (between Indoor Unit and Outdoor Unit) ........ 154
5.6
Unspecified Voltage (between Indoor Unit and Outdoor Unit) ................. 155
6. Troubleshooting for Outdoor Unit............................................................156
6.1
Refrigerant Shortage ................................................................................ 156
6.2
Low-voltage Detection or Over-voltage Detection .................................... 159
6.3
Signal Transmission Error (on Outdoor Unit PCB) (24/32 Class Only) .... 161
6.4
Unspecified Voltage (between Indoor Unit and Outdoor Unit) / Anti-icing
Function in Other Rooms ......................................................................... 162
6.5
Anti-icing Function.................................................................................... 163
6.6
Outdoor Unit PCB Abnormality (24/32 Class Only).................................. 165
6.7
OL Activation (Compressor Overload) ..................................................... 166
6.8
Compressor Lock ..................................................................................... 167
6.9
DC Fan Lock ............................................................................................ 168
6.10 Input Overcurrent Detection ..................................................................... 169
6.11 Four
-
Way Valve Abnormality (18 Class Only).......................................... 170
6.12 Discharge Pipe Temperature Control....................................................... 172
6.13 High Pressure Control in Cooling ............................................................. 173
6.14 Compressor Sensor System Abnormality (24/32 Class Only).................. 174
6.15 Position Sensor Abnormality .................................................................... 176
6.16 CT or Related Abnormality ....................................................................... 179
6.17 Thermistor or Related Abnormality (Outdoor Unit) ................................... 181
6.18 Electrical Box Temperature Rise.............................................................. 183
6.19 Radiation Fin Temperature Rise .............................................................. 186
6.20 Output Overcurrent Detection .................................................................. 189
7. Check ......................................................................................................191
7.1
Thermistor Resistance Check .................................................................. 191
7.2
Fan Motor Connector Check .................................................................... 192
7.3
Hall IC Check ........................................................................................... 192
7.4
Power Supply Waveform Check............................................................... 193
7.5
Outdoor Electronic Expansion Valve Check............................................. 194
7.6
Four Way Valve Performance Check ....................................................... 195
7.7
Inverter Unit Refrigerant System Check................................................... 195
7.8
“Inverter Checker” Check ......................................................................... 196
7.9
Rotation Pulse Check on the Outdoor Unit PCB ...................................... 197
7.10 Installation Condition Check..................................................................... 198
7.11 Discharge Pressure Check....................................................................... 198
7.12 Outdoor Fan System Check ..................................................................... 199
7.13 Main Circuit Short Check.......................................................................... 199
