Great Wall Florid. Manual - part 52

GWFLORID Maintenance Manual

206

Failure

Symptoms 

Cause analysis

Heating sys-

tem

No or insuffi-

cient heating

Air conditioner blower malfunction

Blower relay damaged

Hot air duct blockage

Cooling water pipe blockage

Temperature change throttle actuator damaged

Coolant insufficient

Blower does 

not work

Fuse blown or ill switch contact

Blower motor burnt out

Blower's high speed relay broken

Speed adjustive resistance damaged

Open circuit

Water leakage

Heater water pipe degradation, poor connection

Over heated

Fan's speed adjustive resistance damaged

Temperature change throttle actuator damaged

Defroster’s hot 

air insufficient

Mode cable damaged

Vent is not in place

Air outlet blockage

Insufficient heating

Air duct mounting

Open circuit

Troubleshooting (Continued)

207

Air Conditioning System

Air Conditioning System's Structure Diagram and Fundamentals

Air Conditioning System Overview

Basic composition

Composed of  air conditioner, compressor assembly, condenser 

assembly, pipeline, defroster system, heating & ventilation 

system, etc. The air conditioner also includes evaporator and 

blower components.

Function

This  system is  a  manually controlled  air  conditioning 

system, with steam compression as its cooling method.

Residual heat water warming is the heating method the 

engine adopts. Inner & outer circulation, blowing mode, 

and cold & warm temperature adjustment are all controlled 

by individual cables from the air conditioning controller. It 

achieves ventilation, warming, and cooling integration.

Caution: While starting the compressor, you must open 

the air regulation knob first, otherwise it cannot start.

Operation

The compressor is driven directly by the engine. High 

temperature and high pressure refrigerant vapor exhausted 

from the compressor will pass through the high pressure 

pipe into the condenser, dissipate the heat via temperature 

difference, and then form a high pressure liquid. High 

pressure liquid passes through the accumulating dehydrator 

into the expansion valve, and after passing through the 

throttle  valve,  it  becomes  a  low  pressure  liquid.  Heat 

exchange via the evaporator will cool down the room’s air, 

and then the refrigerant inside the system will become a low 

temperature and low pressure vapor, which is then sucked 

into the compressor and compressed into high temperature 

and high pressure air again. Thus a cooling cycle is formed. 

The circulation continues, which maintains a comfortable 

temperature inside the vehicle.

Expansion valve

Compressor 

Condenser fan

Condenser

Pipeline

Air conditioner

Accumulating 

dehydrator

GWFLORID Maintenance Manual

208

Air Conditioning System Terminal Definition

Pin

Interface signal

Pin

Interface signal

A

Emergency lamp relay

2

Parking lamp drive +

B

Power supply (+)

3

Safety indicator 

lamp drive +

C

Ground

4

Blower LO gear drive +

D

Power supply

5

Blower common 

terminal GND

E

Air conditioner 

request signal

6

Blower HI gear drive +

F

Blower relay

9

Blower M1 gear drive +

10

Blower M2 gear drive +

Air conditioner switch

Hazard warning switch + rear defroster switch

Blower + night lighting + safety instruction

Cylinder

Blade

Exhaust valve

Rotor

Exhaust 

valve

Compressor

Entire outline structure (shown on the left)

Rotary vane compressor’s operation 

As the diagram shows, when the rotor is rotating under an 

external force, due to the synergism of centrifugal force and the 

oil pressure difference on the five vanes of the rotor, their edge 

clings to the cylinder wall. Because the fixed cylinder is oval 

shaped, while rotating on the rotor, the rotor vanes spread and 

retract according to the cylinder's geometrical shape, which in 

turn makes the crescent shape consisting of the cylinder, vanes, 

etc. to change continuously, so as to achieve the functions of 

suction, compression, and exhaustion.

209

Air Conditioning System

Compressor Removal

1.  Hoist the vehicle with a jack.

2.  Remove the bottom mudguard.  

3.  Remove the compressor.

Compressor Installation

Before installing, manually rotate the compressor several 

circles, allowing each component in the relative motion to be 

covered with lubricant.

Clearance between the compressor's auricular branch and 

bracket should be less than 0.1 mm. If the clearance is too 

big, fill the clearance with a washer.

1.  Loosen the engine's adjusting bolt firstly, take down the 

engine belt, and then change the compressor belt.

2.  Fix the compressor bracket onto the engine body with 

the bolts. The bracket must be fastened tightly with suf-

ficient intensity. Fix the compressor bracket onto the 

engine with four M10 ×1.25 (Q1461030 FD) bolts and 

a tightening torque of 45±5 N·m, and then install the 

compressor onto the bracket with a tightening torque of 

22±3 N·m.

3.  Take  off  the  suction  and  exhaust  cap.  Select  the 

suction duct and exhaust duct that matches the size 

of the suction and exhaust port to connect with each 

other (size of suction and exhaust port shown in the 

diagram). Then tighten the coupling bolt.

Water pump pulley

Engine pulley

Tensioner  pulley

Steering 

pump pulley

Crank pulley Compressor pulley

Suction port (S-end) size

Exhaust port (D-end) size

C-C 

2:1

B-B 

2:1

4.  Put the 4PK850 type compressor belt onto the pulley, 

and then adjust the bracket to make the belt reach the 

specified tension. That is, if a force of 100

-

120 N is 

used on the belt, deformation of the belt is 8

-

10 mm.

5.  Insert the thermal protector plug into the relevant plug 

of the air conditioning system's wire harness.