MOTOR GP-GEROTOR 2190428 - Caterpillar

Perform this adjustment when the compressor is in automatic mode. The command signal of the target discharge temperature will help you determine whether or not to perform the compressor control. Change the compressor to ON or OFF using the air conditioning on/off switch. When the On/Off switch is manually operated, the mode for manual operation (ON or OFF) is set.
When the compressor control is ON, the LED indicator comes on.
When the compressor control is OFF, the LED indicator goes off.
Illustration 3 g00302977
(1) Compressor OFF. (2) Compressor ON. (T) Evaporator detected temperature.
In order to prevent the evaporator from frosting, perform the compressor (On/Off) control in accordance with the temperature that is detected by the evaporator sensor.
When "MAX COOL" (18 °C) is chosen, the compressor comes on.Note: When the pressure switch is in the OFF position, the compressor shuts off regardless of the temperature inside the cab.
Table 1
Pressure switch OFF     High side     (3.14 2 MPa/G)    
Pressure switch OFF     Low side     (0.196 .02 MPa/G)    Sunlight Correction Function
Illustration 4 g00302978
(A) Temperature correction (°C). (B) Direct sunlight (Kcal/h m2).Determine the amount of sunlight correction almost in proportion to the sunlight amount that has been detected by the sunlight sensor. Lower the target discharge temperature in proportion to the calculated amount of correction.Warm Up Control (Cold Air Discharge Suppression Control)
When the ambient (outside) temperature is low, prevent the discharge of cold air by suppressing air flow until the water temperature of the engine increases. Understand that the following conditions remain established:
Fan: Automatic mode
Target discharge temperature ­ (minus) preset temperature (18.5°C to 31.5°C) = 45°C
Discharge mode: other than DEFROST mode
The warm up control is cancelled when the water temperature sensor detects less than 35°C. This is true even ten minutes after the engine start switch is turned ON.
When the detected temperature is 20°C or below, air flow will not occur.
When the detected temperature is 20°C to 35°C, air flow is on low (L).
When the detected temperature is above 35°C, the warm up control finishes and switches to the "AUTO" mode. The warm up control will not start again until the engine start switch is turned OFF.
When manual operation is chosen during the warm up control, warm up control is ended.Other Auxiliary Functions (Manual Selection)
MAX COOL, MAX HOT
When 18°C and 32°C are preset, the maximum cooling (MAX COOL) is set at 18°C and the maximum heating (MAX HOT) is set at 32°C.
Table 2
Preset Temperature    MAX COOL (18 °C)    MAX HOT (32 °C)    
Temperature control     Fully closed     Fully opened    
Discharge mode     FACE     FOOT    
Compressor mode     ON     OFF    
Fan speed     "H"     "M2"    Note: When manually operated, manual operation is preceded.Suction Mode Control
The damper motor (recirculation and fresh air) is responsible for changing the suction mode. When the system is OFF, recirculation is selected. By pushing the air inlet selection switch that you desire, the respective mode will be selected.Discharge Mode Control
Two damper motors control the position from