4.7 Charging the Remaining Refrigerant ........................................................................................................................ 118

4.8 Startup wizard ........................................................................................................................................................... 118

4.9 (Optional) Power-off ................................................................................................................................................. 126

4.10 Checking After Commissioning .............................................................................................................................. 127

5 Operation and Maintenance ................................................................................................... 128

5.1 Routine Maintenance ................................................................................................................................................ 128

5.1.1 Data Record ........................................................................................................................................................... 128

5.1.2 Monthly Maintenance ............................................................................................................................................ 128

5.1.3 Quarterly Maintenance .......................................................................................................................................... 131

5.1.4 Yearly Maintenance ............................................................................................................................................... 132

5.2 Alarm Reference ....................................................................................................................................................... 133

5.3 Troubleshooting ........................................................................................................................................................ 154

5.4 Parts Replacement .................................................................................................................................................... 158

5.4.1 Replacing the Air Filter.......................................................................................................................................... 158

5.4.2 Replacing the Indoor Fan ....................................................................................................................................... 159

5.4.3 Replacing the Differential Pressure Switch ........................................................................................................... 162

5.4.4 Replacing the Compressor ..................................................................................................................................... 165

5.4.5 Replacing the Filter Dryer ..................................................................................................................................... 172

5.4.6 Replacing the Driver .............................................................................................................................................. 175

5.4.7 Replacing the Liquid Level Detector ..................................................................................................................... 178

5.4.8 Replacing the Condensate Pump ........................................................................................................................... 182

5.4.9 Replacing the Humidifier Pump ............................................................................................................................ 186

5.4.10 Replacing the Wet Film Humidifier ..................................................................................................................... 189

5.4.11 Replacing the Electric Heater .............................................................................................................................. 192

5.4.12 Replacing a Strong-current Box ........................................................................................................................... 196

5.4.13 Replacing Main Control Module, Auxiliary Power Supply Module, or PSU ...................................................... 199

5.4.14 Replacing the T/H Sensor .................................................................................................................................... 202

5.4.15 Replacing the LCD .............................................................................................................................................. 204

5.4.16 Replacing the Switch ........................................................................................................................................... 208

5.4.17 Replacing the Contactor ....................................................................................................................................... 210

5.4.18 Replacing the SPD ............................................................................................................................................... 212

5.4.19 Replacing the Relay ............................................................................................................................................. 214

5.4.20 Replacing the Fuse ............................................................................................................................................... 216

6 FAQ .............................................................................................................................................. 219

6.1 Querying Temperature and Humidity Curves ........................................................................................................... 219

6.2 How Can I Handle Active Alarms? ........................................................................................................................... 220

6.3 Querying Logs .......................................................................................................................................................... 221

6.4 Querying Device Runtime ........................................................................................................................................ 222

6.5 Querying Component Status ..................................................................................................................................... 222

6.6 Querying System Parameters .................................................................................................................................... 223

6.7 Querying Version Details .......................................................................................................................................... 225

Issue 01 (2017-07-27)

Huawei Proprietary and Confidential

Contents

Table of Contents