Weak current College】 【the air conditioning with cooling technology law questions and answers reference 13 --- Power By】 【China power house network.

254, heat pump type split air conditioners at power-on, indoor and outdoor fan rotation, but the compressor does not rotate, no refrigeration, this fault and the following of (B).
(A) compressor start capacitor circuit (B) solenoid valve coil circuit breaker
(C) overload protector circuit breaker (D) short circuit temperature controller
255, reduce weight start relay inductance coil turns after (D).
(A) release the current decrease for low voltage (B) release the current increase for high voltage
(B) release the current unchanged for low voltage (D) apply current unchanged for high voltage
256, air conditioner pressure too high-voltage side of reason is (C).
(A) the evaporator is too dirty (B) refrigerant shortage
(C) condenser dust too much (D) the power supply voltage is too low
257, air conditioner refrigeration, because (A) cause the compressor to overheat protector actions and the circuit is disconnected.
(A) dry filter clogging (B) indoor air temperature low
(C) evaporator with dirt too much (D) the fan speed is too high
258, the window type air conditioner, compressor temperature rise too high, and (B).
(A) refrigerant leaks (B) low fan speed
(C) refrigerant excessive (D) capillary plug
259, compressor operation current too high is because (A).
(A) the power supply voltage is too low (B) refrigerant too little
(C) expansion valve opening small (D) low fan speed
260, window type air conditioner evaporator frosting, (C).
(A) the room temperature is high (B) the amount of refrigerant charging too much
(C) indoor temperature low (D) high fan speed
261, (D) is not a compressor efficiency difference.
(A) cylinder clearance is too large (B) piston and cylinder clearance is too large
(C) valve leak (D) refrigerant leakage
262, compressor does not work properly because (B).
(A) take a mouthful of piston ring gap is too large (B) temperature controller failure
(C) cylinder clearance is too large (D) refrigerant shortage
263, oil pressure instability is (C).
(A) (B) modification of lubricant oil temperature is too high (
C) hydraulic pump suction oil with foam (D) excessive lubricant
264, (A) is not back to the gas heat through high.
(A) there is air in the system (B) the evaporator refrigerant is too small
(C) inspiratory valve leakage or damage (D) failure of suction pipe insulation
265, (D) is not a screw compressor temperature or overheat.
(A) the compression ratio is too large (B) oil cooler effect difference (
Insufficient quantity between C) (D) energy-regulating device failure
266, centrifugal compressor surge occurs and strong, rhythmic noise and buzz sound reason is (C).
(A) failure of earthquake preparedness measures based on the machine (B) of the compressor and the main motor bearing hole different heart
(B) import Wang Yue through small (D) seal tooth and rotor parts touch Sassafras
267, (C) is not a refrigeration system condensing pressure is too high.
(A) lack of cooling water (B) of the cooling water temperature is too high (C) refrigerant shortage (D) not enough condensation area
268, air conditioner compressor operates non-stop for a long time because of (D).
(A) the voltage is low (B) the condenser ventilation (C) refrigerant excessive (D) thermostat failure
269, air conditioner not wind because (B).
(A) air filter dirty plug (B) fan flip
(C) thermostat temperature package leakage (D) refrigerant shortage
270, compress several suction tube frosting is (C).
(A) in the compresses a few poor oil return (B) the system has a Non-Condensable gases
(C) expansion valve regulated inappropriate (D) evaporator with excessive workload