Trouble shooting
Following is the common troubles and reasons
1. The entire AC system is power off
• Reason analysis
- Fuse of AC is burnout.
- Wiring harness of AC power is not connected.
2. Evaporation fan is running, after turning on temperature control switch, indication light is not on,
condensation fan and compressor do not work.
• Reason analysis
- Indoor temperature of driving cab is lower than 4º
- Temperature sensing detector is open circuit or not connected.
- AC temperature control switch relay is broken.
3. Evaporation fan rotates, condensation fan rotates, compressor does not absorb
- Coil of compressor clutch is broken
- High/low pressure switch is broken.
- Freon is leaked
- Circuit from high/low pressure switch to compressor is open.
4. Evaporation fan does not run, condensation fan runs, compressor absorbs
- Earth wire of evaporation fan drops, or earth wire contact is not good.
- III gear switch is broken
- Evaporation fan is broken
SPC000024 Air Conditioner
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