Heating And Air Conditioning System; Check The Air Conditioning System - SANY SY155U Operation And Maintenance Manual

Heating and Air Conditioning System

Check the Air Conditioning System

While checking the air conditioning system, also check
the following:
Air Conditioning System
Assembly/
Component
Hose and line Check the hoses and lines for
assembly cracks and leaks.
Check for loose connections or
loose fasteners.
Connecting Check if connection is loose, check
fasteners for loose or damaged connecting
fasteners.
Drive belt Check for deterioration due to
heavy wear, scarring, and cracking.
Condenser Check for blockage by debris
assembly (garbage, dust, grass, etc.).
Refrigerant leak Check for leaks at line and hose
connections.
Noise Check compressor (not under
load).
Check condenser and evaporator
fans.
NOTE: If any abnormalities are discovered, contact a
SANY dealer. Do not repair the air conditioning
system beyond the tasks described in this
manual.
This system is under pressure. Working on it
could create a hazardous situation, which could
result in injury. Contact a SANY dealer if repairs
are required.
2
3
Figure 5-40
SY155U Excavator OMM
Check(s)
CAUTION
1
1. Inside the cab, press the A/C power key (1) to turn on
the air conditioning system. Check start-up, air flow
control (3), and fan speed control (2). See "Climate
Control System" on page 3-20.
2. Shut down the engine.
3. Prepare the machine for checks and inspections.
See "Maintenance Safety" on page 2-5.
4. Open the appropriate access covers or compartment
doors. See "Doors, Panels, Covers, and Filler Cap"
on page 4-5.
5. Turn the battery disconnect switch to OFF. See
"Battery Disconnect Switch" on page 3-15.
4
6. Check the air conditioner condenser (4) for leaks.
7. Check the air conditioner compressor (6) for:
• Refrigerant leaks at the hose and line connections
(5).
• Loose, worn, or twisted drive belt (7).
0003663
5-27
MAINTENANCE
Figure 5-41
5
6
Figure 5-42
0003603
7
0003613