CK200208 bus a/c control panel: Dimension: 152*66*56(mm) weight: 260g Display: Marked+backup lamp Display accuracy: ±1oC. Power Supply: 24V(DC20V-DC32V) Power consumption: 2.5W Current: Max.150mA Input: 1) Inside temp. sensor(25oC,Rb=5k, B=3274) 2). Defrost Sensor(25oC,Rb=5k, B=3274) 3). Pressure switch 4). Power(generator) 5). ACC power(battery) 6). Backup lamp power(optional) Output: 1). Condenser fan(max.3A) 2). Fan high (max. 3A) 3). Fan mid (max. 3A) 4). Fan low (max. 3A) 5). Fresh air open (max. 1A) 6). Clutch (max.1A) 8).Warm output(max.1A) Main functions: manual operation, cool, fresh air, error alarm, air-flow regulate, linear temp set.