2001 NISSAN X-TRAIL Service Repair Manual

ignition bulb navigation update trunk release brake tires

Page 3297 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual REFRIGERATION SYSTEM
ATC-21
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Operation
1. Operation Control Valve
Operation control valve is located in the suction port (low-pressure) side, and opens or closes in response

REFRIGERATION SYSTEM
ATC-21
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Operation
1. Operation Control Valve
Operation control valve is located in the suction port (low-pressure) side, and opens or closes in response
to changes in refrigerant suction pressure.
Operation of the valve controls the internal pressure of the crankcase.
The angle of the swash plate is controlled between the crankcase's internal pressure and the piston cylin-
der pressure.
2. Maximum Cooling
Refrigerant pressure on the low-pressure side increases with an increase in heat loads.
When this occurs, the control valve's bellows compress to open the low-pressure side valve and close the
high-pressure side valve.
This causes the following pressure changes:
● The crankcase's internal pressure to equal the pressure on the low-pressure side;
● The cylinder's internal pressure to be greater than the crankcase's internal pressure.
Under this condition, the swash plate is set to the maximum stroke position.
3. Capacity Control
● Refrigerant pressure on suction side is low during high speed driving or when ambient or interior tem
perature is low.
● The bellows expands when refrigerant pressure on the suction pressure side drops below approxi
mately 177 kPa (1.8 kg/cm
2 , 26 psi).
Since suction pressure is low, it makes the suction port close and the discharge port open. Thus, crank-
case pressure becomes high as high pressure enters the crankcase.
● The force acts around the journal pin near the swash plate, and is generated by the pressure difference
before and behind the piston.
The drive lug and journal pin are located where the piston generates the highest pressure. Piston pres-
sure is between suction pressure Ps and discharge pressure Pd, which is near suction pressure Ps. If
crankcase pressure Pc rises due to capacity control, the force around the journal pin makes the swash
plate angle decrease and also the piston stroke decrease. In other words, crankcase pressure increase
triggers pressure difference between the piston and the crankcase. The pressure difference changes the
angle of the swash plate.
RHA473C

Page 3298 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual ATC-22
REFRIGERATION SYSTEM
RHA474C

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NISSAN X-TRAIL 2001 Service Repair Manual REFRIGERATION SYSTEM
ATC-23
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Component LayoutEJS00280
NOTE:
This illustration is for RHD models. The layout for LHD models is symmetrically opposite.
RJIA0479E

Page 3300 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual ATC-24
LUBRICANT
LUBRICANT
PFP:KLG00
Maintenance of Lubricant Quantity in CompressorEJS000TH
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compre

Page 3301 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual LUBRICANT
ATC-25
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4.CHECK ANY PART
Is there any part to be replaced? (Evaporator, condenser, liquid tank or in case there is evidence of a large
amount of

Page 3302 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual ATC-26
LUBRICANT
RHA065DI

Page 3303 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual AIR CONDITIONER CONTROL
ATC-27
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AIR CONDITIONER CONTROLPFP:27500
Overview Air Conditioner LAN Control SystemEJS000TI
The LAN system consists of auto amp., mode door motor, a

Page 3304 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual ATC-28
AIR CONDITIONER CONTROL
TRANSMISSION DATA AND TRANSMISSION ORDER
Amplifier data is transmitted consecutively to each of the door motors following the form shown in figure below.
Start: Initial

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