单项选择题
A.insufficient refrigeration B.leaky suction valves C.expansion valve stuck open D.suction valve not adjusted properly
If the high-pressure switch on the compressor opens and...
单项选择题If the high-pressure switch on the compressor opens and stops the compressor a possible cause could be:（）
A.too much cooling water going through the condenser B.not enough refrigerant in the system C.a leak in the evaporator coils D.no enough cooling water going through the condenser
The scale trap is located between the （）A.king valve an...
单项选择题The scale trap is located between the （）
A.king valve and the expansion valve B.solenoid valve and expansion valve C.evaporator and receiver D.compressor and evaporator
The relief valve is located on the（）A.discharge side of...
单项选择题The relief valve is located on the（）
A.discharge side of condenser B.discharge side of compressor C.outlet of the evaporator D.receiver tank
