12 Faults and remedies 12.2 Cab / Operator's platform 67088 00 0293 210 2 - BA DOMINATOR 150/140/130 - 12/09 245 Malfunction Possible cause and remedy Air conditioner shuts down automatically. • Extremely high outside temperature. - Let system cool down, then switch it on again. - Close door and windows. Air conditioner does not provide cooling. Only uncooled air comes out of the air louvres. • Magnetic clutch does not engage. - Have clutch replaced. • Drive belt slack. - Tension or replace V-belt. • Cable connections loose. - Tighten loose or disconnected cables. • Fuses blown. - Install new fuse. • Compressor will not pump coolant. Expansion valve has frozen.
Saturation of moisture indicator has been reached. - Have filter-receiver replaced. For this, the system has to be discharged using the correct recovery equipment and then recharged. Cool air is blown through the air louvres, but the air flow is insufficient for cooling the cab. • Evaporator in cab roof blocked. - Clean evaporator. • Evaporator defective. - Have evaporator replaced (Have air condi- tioner system discharged and then recharge with refrigerant). • Condenser upstream of radiator is soiled. - Clean condenser. • Low refrigerant level. White ball does not float and is at bottom of indicator. - Have air conditioning system checked by a specialist workshop.
• Outside air getting into the cab. - Close door and windows completely. Air conditioner provides cool air for a time, then discharges warm air again. • Ice formation in the expansion valve. up to serial no. …: The filter receiver drier is saturated when the blue ball has turned pink. - Have filter-receiver replaced. (Discharge and then recharge air conditioner.) from serial no. …: The filter receiver drier is saturated when the orange ball has lost its colour. - Have filter-receiver replaced. (Discharge and then recharge air conditioner.)