MCC 68AC353-102 MICROMAX, Операция и обслуживание

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1--4
©
2012 Mobile Climate Control T-348 Rev. 07/2012
Table 1-3 Additional Support Manuals
MANUAL/FORM NUMBER EQUIPMENT COVERED TYPE OF MANUAL
T-348PL 68AC353 Parts List
62-10699 Micromate Diagnostic Tool (Card)
1
4
7
9
2
5
6
13
11
10
8
12
Dash--Air
Option
3
1. Compressor
2. Discharge Check Valve
3. Refrigerant Lines
4. Compressor Harness
5. Electronics Boards - Power Relay
6. Liquid Line Solenoid
7. AC353 (Rooftop) See Figure 1-2
8. Main Harness
9. Driver Control
10. Power Harness
11. Main Circuit Breaker
12. Battery
13. Alternator
Figure 1-1 System Component Identification
1.4 GENERAL DESCRIPTION
1.4.1 Compressor Assembly
The compressor assembly is mounted in the engine
compartment (see Figure 1-1) and includes the
refrigerant compressor, clutch assembly, suction and
discharge service valves, high pressure switch, low
pressure switch, suction and discharge servicing
(charging) ports and electric solenoid unloaders.
The compressor raises the pressure and temperature
of the refrigerant and forces it into the condenser
tubes. The clutch assembly provides a means of belt
driving the compressor by the bus engine. The
suction and discharge service valves enable servicing
of the compressor. Suction and discharge servicing
(charging) ports mounted on the service valves
enable connection of charging hoses for servicing of
the compressor, as well as other parts of the
refrigerant circuit. The high pressure switch contacts
open on a pressure rise to shut down the system
when abnormally high refrigerant pressures occur.
The electric unloaders provide a means of
controlling compressor capacity, which enables
control of temperature inside the bus. For more
detailed information on the 05G compressor, refer
to the Operation and Service Manual number
62-02756.
1.4.2 Discharge Check Valve
A check valve is located in the discharge line close to
the compressor. (see Figure 1-1) The discharge
check valve is a spring loaded, normally closed valve
that opens with the flow of refrigerant from the
compressor. When the compressor clutch is
disengaged, the discharge check valve will close,